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1

Digitale Medien

Esterification of C2−C16 dicarboxylic acids to n-butyl esters in aqueous solutions for their gas chromatographic analysis (1984)

Molnár-Perl, I. ; Fábián-Vonsik, V. ; Pintér-Szakács, M.

Springer

Chromatographia 18 (1984), S. 637-641

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ISSN: 1612-1112

Schlagwort(e): Gas chromatography ; Esterification in aqueous solution ; n-Butyl esters of C2−C16 dicarboxylic acids ; Dicarboxylic acid analysis

Quelle: Springer Online Journal Archives 1860-2000

Thema: Chemie und Pharmazie

Notizen: Summary C2−C16 dicarboxylic acids were esterified in aqueous solution in the presence of sulfuric acid. Esterification in water/n-butanol mixtures with mole ratios between 0.02 and 2.53 can be utilized for the quantitative determination of the dicarboxylic acids by gas chromatography. The presence of water does not interfere at water/n-butanol mole ratios below 0.27. For mole ratios above 0.27 anhydrous sodium sulfate has been used for binding the water. The mole ratio range was 0.25–0.75 for anhydrous sodium sulfate/water, and 0.32–1.3 for sulfuric acid/anhydrous sodium sulfate.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF02261980

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2

Digitale Medien

Solubilities and partial molar enthalpies of solution for polar gas-liquid systems determined by gas chromatography (1984)

Sweeney, C. W.

Springer

Chromatographia 18 (1984), S. 663-667

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ISSN: 1612-1112

Schlagwort(e): Gas chromatography ; Gas solubilities ; Enthalpies of solution ; Polar solutions

Quelle: Springer Online Journal Archives 1860-2000

Thema: Chemie und Pharmazie

Notizen: Summary The gas-liquid chromatographic method has been used to determine the solubilities and partial molar enthalpies of solution of the gases H2S, CO2 and COS in four polar solvents. The results agree well with literature values obtained using conventional techniques, with the one exception of H2S in N-methyl-2-pyrrolidinone. In this case there is some evidence for the occurrence of adsorption at the gas-liquid interface.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF02265810

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3

Digitale Medien

Gas chromatographic analysis of aromatic, carboxylic acids in the presence of C1−C5 fatty acids and C2−C7 dicarboxylic acids esterified in aqueous solutions as the n-butyl esters (1984)

Molnár-Perl, I. ; Fábián-Vonsik, V. ; Pintér-Szakács, M.

Springer

Chromatographia 18 (1984), S. 673-676

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ISSN: 1612-1112

Schlagwort(e): Gas chromatography ; Esterification in aqueous solution ; n-Butyl esters of aromatic polycarboxylic acids

Quelle: Springer Online Journal Archives 1860-2000

Thema: Chemie und Pharmazie

Notizen: Summary The direct esterification and gas chromatographic analysis of aromatic carboxylic acids as n-butyl esters is described. Derivatization is performed in aqueous solution with n-butanol in the presence of sulfuric acid. The butyl esters of benzoic, phthalic, hemimellitic, trimellitic, trimesic and pyromellitic acids permit their gas chromatographic separation from each other and from fatty acids and alipatic dicarboxylic acids. At mole ratios of [H2O]/ [n-BuOH]≤0.04 the water present does not interfere with the esterification reaction. At mole ratios above 0.04 anhydrous sodium sulfate is used for binding the water, at mole ratios of [Na2SO4 anh.]/[H2O]=0.25–0.75.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF02265812

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4

Digitale Medien

Interactions of some polar compounds with methylsilicone liquid phases in gas chromatography (1984)

Masłowska, J. ; Nowicka, K.

Springer

Chromatographia 18 (1984), S. 202-204

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ISSN: 1612-1112

Schlagwort(e): Gas chromatography ; Polysiloxane stationary phases ; Heat of adsorption ; Heat of solution

Quelle: Springer Online Journal Archives 1860-2000

Thema: Chemie und Pharmazie

Notizen: Summary The changes in the heat of solution of polar compounds and xylene isomers in methylsilicone fluid OV-101 deposited on Chromosorb W AW DMCS were studied. It was shown that the heat of solution increases with an increase of the percentage loading of the OV-101 up to 10%. Solution and adsorption thermodynamic characteristics of the studied system are briefly discussed.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF02276733

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5

Digitale Medien

Investigation of interaction of olefin-bonded transition metal complexes by gas chromatography. Diphenylphosphine complexes with CoCl2 and CoBr2 (1984)

Wasiak, W. ; Szczepaniak, W.

Springer

Chromatographia 18 (1984), S. 205-210

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ISSN: 1612-1112

Schlagwort(e): Gas chromatography ; Metal complexes ; Chemically bonded phase

Quelle: Springer Online Journal Archives 1860-2000

Thema: Chemie und Pharmazie

Notizen: Summary Packings consisting of diphenylphosphine complexes with CoCl2 and CoBr2, chemically bonded to the silica surface, were synthesized and their retention parameters determined. The packings are capable of specifically interacting with electron-donating compounds by forming π-complexes. The interaction is considerably stronger in the case of CoBr2-containing packing than in the case of CoCl2-containing packing.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF02276734

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6

Digitale Medien

On-column injection in the stopped-flow mode with open-tubular columns (1984)

Pacholec, F. ; Poole, C. F.

Springer

Chromatographia 18 (1984), S. 234-238

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ISSN: 1612-1112

Schlagwort(e): Gas chromatography ; Open-tubular columns ; On-column injection ; Stopped-flow operation

Quelle: Springer Online Journal Archives 1860-2000

Thema: Chemie und Pharmazie

Notizen: Summary A simple, inexpensive, on-column injector of the septum moving-needle kind is described for quantitative analysis using open-tubular columsn. when operated in the stopped-flow mode an improvement incolumn efficiency is observed combined wit a diminished tendency to produce split-top peaks, particularly for late eluting peaks. Using electronic integration a relative error of about 2.7% was observed for peaks spanning a wide range of sample concentrations and volatilities.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF02270556

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7

Digitale Medien

Viscosity of gases used as the mobile phase in gas chromatography (1984)

Ettre, L. S.

Springer

Chromatographia 18 (1984), S. 243-248

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ISSN: 1612-1112

Schlagwort(e): Gas chromatography ; Carrier gas ; Viscosity ; Influence of temperature

Quelle: Springer Online Journal Archives 1860-2000

Thema: Chemie und Pharmazie

Notizen: Abstract The vicosity-temperature relationship of the three gases (helium, nitrogen and hydrogen) most frequenly used as the carrier gas in gas chromatography is studied. Based on available data, equaitions are derived to describe this relationship. Using these equations viscosity data are tabulated for the chromatographically important temperature range.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF02270558

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8

Digitale Medien

Gas chromatographic determination of parabens in various pharmaceutical dosage forms (1984)

Croo, F. ; Schutter, J. ; Bossche, W. ; [weitere]

Springer

Chromatographia 18 (1984), S. 260-264

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ISSN: 1612-1112

Schlagwort(e): Parabens and their dissolution ; Pharmaceutical dosage forms ; Derivatization ; Gas chromatography

Quelle: Springer Online Journal Archives 1860-2000

Thema: Chemie und Pharmazie

Notizen: Summary A specific, sensitive and general applicabla gas chromatographic method is described for the determination of parabens in various liquid pharmaceutical preparations: propylparaben and butylparaben in a liquid antacid dosage form (I); methylparaben, ethylparaben and propylparaben in a syrup (II); methylparaben and propylparaben in a solution for injection (III). Each time one of the parabens is used as internal standard. The parabens are extracted with diethylether and derivatized by silylation. Different columns are used for the analysis of the parabens: 3% SE-30 column, a 3% QF-1 column for different selectivity, a 2% OV-1 column for isothermal operation. Special attention is attributed to the standard: the parabens are dissolved in a minimal amount of 0.1 M sodium hydroxide and extracted in the same way as the pharmaceutical dosage form.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF02270561

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9

Digitale Medien

Resolution and assignment of the configuration of secondary aliphatic alcohols by gas chromatography on chiral phase (1984)

Binet, S. ; Dreux, J. ; Longeray, R.

Springer

Chromatographia 18 (1984), S. 294-296

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ISSN: 1612-1112

Schlagwort(e): Gas chromatography ; Configuration ; Resolution ; Alcohols

Quelle: Springer Online Journal Archives 1860-2000

Thema: Chemie und Pharmazie

Notizen: Summary The study of the resolution of sixteen secondary aliphatic alcohols by gas chromatography on (+)-dodecyl (2R, 3R)-tartrate, trapping the ascending part of the peak from a conventional filled column, has allowed the determination in a single operation of the sign and order of emergence of enantiomers. A correlation between the configuration of these secondary alcohols and their order of emergence has been established.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF02259080

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10

Digitale Medien

Analysis of carboxylic acids by gas chromatography. Derivatisation using chloroacetone (1984)

McCalley, D. V. ; Thomas, C. W. ; Leveson, L. L.

Springer

Chromatographia 18 (1984), S. 309-312

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ISSN: 1612-1112

Schlagwort(e): Gas chromatography ; Carboxylic acids ; Acetonyl derivatives

Quelle: Springer Online Journal Archives 1860-2000

Thema: Chemie und Pharmazie

Notizen: Summary The preparation of the acetonyl esters of nine aliphatic carboxylic acids is described, the general formula of the derivatives being RCOOCH2COCH3 where R=alkyl or H. The derivatives show good chromatographic properties on both packed and capillary columns. The electron impact and chemical ionisation mass spectra of the derivatives are discussed.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF02259083

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11

Digitale Medien

A thermodynamic criterion for the identification of the functional group of aliphatic compounds by gas chromatography (1984)

Golovnya, R. V. ; Grigoryeva, D. N.

Springer

Chromatographia 18 (1984), S. 449-455

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ISSN: 1612-1112

Schlagwort(e): Gas chromatography ; Thermodynamic relationships ; Retention index ; Peak identification

Quelle: Springer Online Journal Archives 1860-2000

Thema: Chemie und Pharmazie

Notizen: Summary A thermodynamic criterion, ΔQ, is suggested which permits to estimate the difference in the functional group energy of interactions for two different stationary phases. The linear dependence of ΔQ on the homolog number m of any series Rm X can be used as the thermodynamic criterion for the identification of substances by GC analysis.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF02262976

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12

Digitale Medien

Performance of open tubular columns as a function of tube diameter and liquid phase film thickness (1984)

Ettre, L. S.

Springer

Chromatographia 18 (1984), S. 477-488

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ISSN: 1612-1112

Schlagwort(e): Gas chromatography ; Open tubular (capillary) columns ; Sample capacity ; Column comparison ; Film thickness ; Column diameter

Quelle: Springer Online Journal Archives 1860-2000

Thema: Chemie und Pharmazie

Notizen: Summary Wall-coated, open-tubular (capillary) columns prepared from different diameter tubing, with different liquid phase film thickness, are compared with each other and with packed and support-coated open-tubular columns. The comparison is based on the variation of the phase ratio and the capacity factor, and includes column efficiency (HETP, theoretical plate number), resolution, retention time, and sample capacity. Problems associated with the evaluation of the sample capacity are outlined. The influence of temperature on column performance is discussed in detail. Finally, the possibilities of short, wide-bore open-tubular columns prepared with a thick liquid-phase film are demonstrated.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF02267232

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13

Digitale Medien

Open tubular columns: The influence of changing the liquid phase film thickness on column efficiency (1984)

Benedek, P. ; Józsa, L. ; Ettre, L. S.

Springer

Chromatographia 18 (1984), S. 367-368

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ISSN: 1612-1112

Schlagwort(e): Gas chromatography ; Open tubular (capillary) columns ; Variation of film thickness ; Thick-film columns ; Mass transfer terms

Quelle: Springer Online Journal Archives 1860-2000

Thema: Chemie und Pharmazie

Notizen: Summary The factors characterizing the influence of the variation of the liquid phase film thickness on the mass transfer terms in the Golay equations describing the performance of open tubular columns are investigated and numerical values are given.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF02262482

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14

Digitale Medien

The preparation of analytically stable, immobilized stationary phase coatings on colums packing materials (1984)

Ghaoui, L. ; Shanfield, H. ; Zlatkis, A.

Springer

Chromatographia 18 (1984), S. 11-14

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ISSN: 1612-1112

Schlagwort(e): Gas chromatography ; Cross-linked Stationary phase ; Immobilized Stationary phase ; Packed columns ; Trapping

Quelle: Springer Online Journal Archives 1860-2000

Thema: Chemie und Pharmazie

Notizen: Summary A coating of silicone SE-54 on Chromosorb W has been converted to an analytically stable, immobilized stationary phase layer by cross-linking with an organic peroxide. Up to 10% by weight has been applied in this manner. Excellent high temperature qualities are exhibited, such as low bleeding and good base line stability, during typical analyses. Poly (2,6-dimethyl-p-phenylene oxide) has also been crosslinked as a surface coating on Chromosorb W with an organic peroxide. From 3 to 4% by weight has been immobilized in this way. The resultant packing material, following high temperature conditioning, has been examined for use as an adsorbent of trace substances, similar to the applications to which such adsorbents as Tenax GC have commonly been applied, e.g. trace analysis of air. It appears to exhibit satisfactory properties for this analytical purpose.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF02279455

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15

Digitale Medien

Gas-liquid chromatography of isopropylidene-glucose and glucose as their trimethylsilyl derivatives (1984)

Novina, R.

Springer

Chromatographia 18 (1984), S. 21-22

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ISSN: 1612-1112

Schlagwort(e): Gas chromatography ; Isopropylidene-glucose ; Glucose ; GC of TMS-derivatives

Quelle: Springer Online Journal Archives 1860-2000

Thema: Chemie und Pharmazie

Notizen: Summary This paper describes the gas chromatographic separation of the mixture of di- and mono-O-isopropylidene-D-glucose and D-glucose as their trimethylsilyl derivatives. The use of OV-101 as liquid phase provides a complete separation for the all components in the mixture. Quantative analysis was performed using xylitol as the internal standard for di- and mono-O-isopropylidene-D-glucose, and sorbitol as the internal standard for α-and β-glucose.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF02279458

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16

Digitale Medien

Coupling of chromatography and NMR part 5: Analysis of high-boiling gas-chromatographic fractions by on-line nuclear magnetic resonance (1984)

Herzog, H. ; Buddrus, J.

Springer

Chromatographia 18 (1984), S. 31-33

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ISSN: 1612-1112

Schlagwort(e): Gas chromatography ; Nuclear magnetic resonance ; Terpenes

Quelle: Springer Online Journal Archives 1860-2000

Thema: Chemie und Pharmazie

Notizen: Summary A procedure is described for recording1H NMR spectra of flowing gaseous GC fractions boiling as high as 200°C. The line width of the signals in the NMR spectra is smaller than 2.2Hz.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF02279461

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17

Digitale Medien

Chromatographic determination of tetramethrin on woolen cloth and in aqueous treatment formulations (1984)

Simonaitis, R. A. ; Cail, R. S.

Springer

Chromatographia 18 (1984), S. 556-559

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ISSN: 1612-1112

Schlagwort(e): Gas chromatography ; Liquid chromatography ; Tetramethrin ; Residues

Quelle: Springer Online Journal Archives 1860-2000

Thema: Chemie und Pharmazie

Notizen: Summary A method is described for the analysis of tetramethrin aqueous formulation and residues of tetramethrin on woolen cloth. The samples were extracted with acetonitrile and partitioned with benzene. Interferences were removed by liquid column chromatography with acid alumina and eluted with 10% ethyl acetate-hexane. Analysis was by gas chromatography with a 10% UCW98 (methylsilicone) column. Detection was made with the flame ionization detector to avoid the repeated dilutions necessary with use of the electron capture detector.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF02265694

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18

Digitale Medien

The role of electric interactions in the retention index concept; Implications in quantitative structure-retention studies (1984)

Lamparczyk, H. ; Radecki, A.

Springer

Chromatographia 18 (1984), S. 615-618

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ISSN: 1612-1112

Schlagwort(e): Gas chromatography ; Retention index ; Electric parameters ; Physico-chemical relationships ; Structure-retention study

Quelle: Springer Online Journal Archives 1860-2000

Thema: Chemie und Pharmazie

Notizen: Summary A new equation is derived relating the retention index to the molecular polarizabilities, ionization potentials and permanent dipole moments of the stationary phase and the solute. Various implications of this equation to quantitative structure-retention relationships are discussed.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF02261974

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19

Digitale Medien

Air-sampling of aldehydes—Application to chromatographic determination of formaldehyde and acetaldehyde (1984)

Guenier, J. P. ; Simon, P. ; Delcourt, J. ; [weitere]

Springer

Chromatographia 18 (1984), S. 137-144

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ISSN: 1612-1112

Schlagwort(e): Aldehydes and ketones ; 2,4-dinitrophenylhydrazine-coated silica gel ; Gas chromatography ; Column liquid chromatography ; Pollution

Quelle: Springer Online Journal Archives 1860-2000

Thema: Chemie und Pharmazie

Notizen: Summary After a brief review of several methods described in the literature this paper discusses air-sampling on 2,4-dinitrophenylhydrazine-coated silica gel and identification requirements for aldehydes and ketones most commonly found in industrial pollution. Quantitative analysis of formaldehyde and acetaldehyde either by GC or by HPLC techniques is established using a dynamic system producing test atmospheres and compared with the usual colorimetric determinations.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF02258770

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20

Digitale Medien

High resolution gas chromatography: Simultaneous detection of narcotics, adulterants, and diluents in street samples (1984)

Comparini, I. Barni ; Centini, F. ; Pariali, A.

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 140-141

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Capillary columns ; Narcotics: street samples ; Narcotics, adulterants and diluents: simultaneous determination ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Zusätzliches Material: 2 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070308

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21

Digitale Medien

High resolution gas chromatography (HRGC) of the lipids extracted from blood serum (1984)

Lercker, G. ; Cocchi, M. ; Turchetto, E. ; [weitere]

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 274-276

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Capillary column, glass ; Liquid-liquid and liquid-solid extraction ; Serum lipids ; Fatty acids ; Cholesterol and cholesteryl esters ; Triglycerides ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Zusätzliches Material: 1 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070509

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22

Digitale Medien

Picomole amounts of methyl chloride by reaction gas chromatography (1984)

Oomens, A. C. ; Noten, L. G.

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 280-281

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Reaction GC ; Iodination reactor ; Electron capture detection ; Trace analysis ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Zusätzliches Material: 2 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070512

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23

Digitale Medien

Device for injection of absorbent-trapped compounds on to a WCOT column (1984)

Langlois, D. ; Mielle, P. ; Etievant, P.

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 477-479

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Glass capillary column ; Adsorbent ; Cold trapping ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Zusätzliches Material: 2 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070806

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24

Digitale Medien

Analysis of pesticide residues by high resolution gas chromatography. Part 1: Comparison between packed and capillary columns in pesticide residue determinations. Practical considerations for routine use of capillary gas chromatography (1984)

Zenon-Roland, L. ; Agneessens, R. ; Nangniot, P. ; [weitere]

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 480-484

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Packed and capillary columns ; Fungicides and insecticides ; Adsorption ; Length of column ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Zusätzliches Material: 3 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070807

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25

Digitale Medien

Advantages and limits of the quantitative determination of α-ferrocenyl carbinols with capillary GC (1984)

Lorbeer, E. ; Widhalm, M.

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 536-537

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Capillary column ; On-Column injection ; Vaporizing injection ; Decomposition ; α-Ferrocenyl carbinols ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Zusätzliches Material: 3 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070910

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The Analysis of volatile compounds by purge and trap with whole column cryotrapping (WCC) on a fused silica capillary column (1984)

Pankow, J. F. ; Rosen, M. E.

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 504-508

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Fused silica capillary columns ; GC/MS/DS ; Cryotrapping and cryofocussing of organics ; Purgeable compound analysis ; Trace organic analysis ; Priority pollutants ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: The purge and trap (P&T) method of analysis has been interfaced with fused silica capillary column gas chromatography. This interfacing has been accomplished without splitting the P&T trap desorption carrier gas. Thus, 100% of the purged compounds are transferred to the column. The analytes are cryofocussed on the column using whole column cryotrapping (WCC) at -80°C. The resulting P&T/WCC procedure is extremely well-suited to the analysis of trace purgeable aqueous organic compounds. Samples and standards containing a variety of aromatic standard compounds were analyzed. The standards included benzene, toluene, ethylbenzene, xylenes, C3-C4-benzenes, and naphthalene, as well as three P&T internal standard compounds. Chromatographic peak widths were uniformly less than 6 s at the base and excellent precision was obtained in the relative retention time data for all compounds. The chromatogram of a groundwater sample contaminated with aromatic gasoline compounds is also presented. Since P&T/WCC works well with fused silica capillary columns, the full sensitivity and chromatographic efficiency of capillary gas chromatography is made available to P&T analyses.

Zusätzliches Material: 2 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070902

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Kovats retention indices of selected olefins on bonded phase fused silica capillaries (1984)

Lubeck, A. J. ; Sutton, D. L.

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 542-544

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Fused silica (capillary) columns ; Bonded (cross-linked) phases ; Hydrocarbon analysis ; Olefinic hydrocarbons ; Retention index data ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Zusätzliches Material: 2 Tab.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070913

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Solute focusing using the solvent effect - A mass spectrometric investigation of packed bed inlets (1984)

Pretorius, V. ; Rohwer, E. R. ; Lawson, K. H. ; [weitere]

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 142-143

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Solute focussing ; Solvent effect ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Zusätzliches Material: 2 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070309

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Deactivation of fused silica capillary columns with polymethylhydrosiloxanes (1984)

Woolley, C. L. ; Kong, R. C. ; Richter, B. E. ; [weitere]

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 329-332

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Fused silica capillary columns ; Deactivation ; Polymethylhydrosiloxanes ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Zusätzliches Material: 2 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070608

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Multidetection of pesticides in capillary gas chromatography (1984)

Deleu, R. ; Copin, A.

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 338-339

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Pesticides ; Multidetection ; ECD-NPSD-SSD ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Zusätzliches Material: 3 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070613

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Analysis of gases containing inorganic compounds and light hydrocarbons on fused-silica open-tubular columns prepared with a thick liquid phase filmEnlarged text of a paper presented at the 35th Pittsburgh Conference on Analytical Chemistry and Applied Spectroscopy, Atlantic City, NJ, USA, March 5-9, 1984. (1984)

Palo, R. T. ; Walters, J. D. ; March, E. W. ; [weitere]

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 358-369

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Capillary columns ; Thick liquid phase films ; Natural and refinery gases ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: Capillary columns having a thick liquid phase film and a low phase ratio permit the separation of low molecular mass compounds which would have a very small capacity factor on columns with a classical thin film. At the same time, the increased sample capacity allows conventional hot-wire thermal conductivity detectors to be used with such columns. The analysis of natural and refinery gases, containing both inorganic compounds and light (C1—C7) hydrocarbons, utilizing a combination of hot-wire and flame ionization detectors, is demonstrated.

Zusätzliches Material: 10 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070705

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Optimization of capillary parameters for gas chromatography (1984)

Ogan, K. ; Scott, R. P. W.

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 382-388

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Capillary columns ; HETP equation ; Optimum column parameters ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: An HETP equation for the capillary column is developed that takes into account the dependence of gaseous diffusion on pressure, the compressibility of the mobile phase, together with the unique relationship between mobile phase velocity, and the resistance to mass transfer in the stationary phase. The equation is used to develop a procedure for column optimization and expressions are derived that allow the optimum column radius and optimum column length to be calculated for a given fixed inlet pressure. It is shown that fast, simple separations are optimally achieved using relatively short small diameter columns. Conversely, optimum performance for the separation of complex mixtures requiring higher efficiencies requires the use of long columns with relatively large diameters.

Zusätzliches Material: 5 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070708

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On the potential of CGC in triglyceride analysis (1984)

Geeraert, E. ; Sandra, P.

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 431-432

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Capillary columns ; Triglycerides ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Zusätzliches Material: 1 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070716

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Determination of nitrated-polyaromatic hydrocarbons (nitro-PAHs) in environmental samples by high resolution chromatographic techniques (1984)

Liberti, A. ; Ciccioli, P. ; Cecinato, A. ; [weitere]

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 389-397

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ISSN: 0935-6304

Schlagwort(e): Low and high resolution liquid chromatography ; Gas chromatography ; Capillary columns ; Alkali flame detection ; Chemical ionization mass spectrometry ; Nitro-PAHs ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: An analytical procedure is described for the fractionation of organic compounds present in environmental samples and the determination of nitro polyaromatic hydrocarbons (nitro-PAHs). Both low and high resolution liquid chromatography are employed for the prefractionation of the soluble organic fraction (SOF) extracted from particulate matter or gaseous pollutants collected on adsorption traps. High resolution gas chromatography is used to analyze four fractions containing alkanes, PAHs, nitro-PAHs, and other polar PAHs. Nitrogen-containing species are separated by GC and detected specifically using an alkali flame (NPD) detector. Flame ionization (FID) detection, GC-MS of positive ions, and negative ion chemical ionization MS of the whole fraction is used for the identification and quantitation of the various components. The composition of SOF extracted from particulate matter emitted from diesel exhausts is elucidated and a large number of nitro-PAHs identified by the combination of the various techniques.

Zusätzliches Material: 7 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070709

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Immobilization of stationary phase films by gamma radiation. Part 2 medium-polarity OV-1701-Vi phase (1984)

Etler, O. ; Vigh, Gy.

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 700-701

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Glass capillary columns ; Immobilization ; 60Co gamma radiation ; Medium-polarity phase ; OV-1701-Vi ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Zusätzliches Material: 1 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240071207

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Analysis of volatile organic compounds in polymers by dynamic headspace and gas chromatography/mass spectrometry (1984)

Jacobsson, Sven

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 185-190

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Capillary columns ; Mass spectrometry ; Dynamic headspace ; Deans switching ; Cold trap ; Reinjection ; Polymers ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: An experimental method for the analysis of volatile organic compounds in polymers is described. The technique involves dynamic headspace sampling, collection, and concentration of the volatiles in a cold trap, followed by capillary column gas chromatography/mass spectometry. Flow switching is carried out by the Deans switching technique. Four technical polymers used as pharmaceutical packaging materials have been analyzed in order to demonstrate the method.

Zusätzliches Material: 6 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070403

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The use of coupled columns for the capillary gas chromatographic separation of water pollutants (1984)

Mehran, Mehrzad F. ; Cooper, W. J. ; Jennings, W.

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 215-217

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Capillary, fused silica ; Coupled columns ; Halogenated organic pollutants ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Zusätzliches Material: 4 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070410

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Chromatographic mechanisms of coated porous polymers: Chromosorb 102 coated with squalane (1984)

Aider, A. ; Devallez, B. ; Guermouche, M.-H.

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 222-224

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Interface ; Partition ; Adsorption ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Zusätzliches Material: 2 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070413

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Activated carbon fiber as stationary phase in gas chromatography (1984)

Asche, W.

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 282-283

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Details

ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Gas analysis ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Zusätzliches Material: 1 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070513

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Large sample injection method (≥ 100 μL) for capillary GC using a commercial thermodesorption unit as injection device (1984)

Kirschmer, P. ; Oehme, M.

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 306-311

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Capillary columns ; Thermodesorption ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: A commercial thermodesorption and cold trap unit can be used as a large sample volume injection device in high resolution gas chromatography. Volumes of more than 100 μl can be injected. More than 97% of solvents, such as hexane, can be removed by a Tenax TA precolumn without any loss of compounds with volatilities comparable to naphthalene. Experimental conditions, recovery rates of polycyclic aromatic hydrocarbons, and the reproducibility of the method are described in detail. The method was successfully applied for the determination of PAH in air particulate matter extracts.

Zusätzliches Material: 3 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070604

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Stability of dibenzothiophene oxides under gas chromatographic conditions (1984)

Andersson, J. T.

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 334-335

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Fused-Silica columns ; Thermal stability ; Dibenzothiophene oxides ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Zusätzliches Material: 3 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070611

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Overcoming background contamination in closed loop stripping analysis (CLSA) (1984)

Grob, K. ; Grob, G. ; Habich, A.

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 340-342

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Sample preparation ; Closed loop stripping analysis ; Charcoal adsorbent filter ; Overcoming contamination ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Zusätzliches Material: 1 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070614

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Direct gas chromatographic analysis of halogenated hydrocarbons at the part-per-trillion level (1984)

Zlatkis, A. ; Ghaoui, L. ; Wang, F.-S. ; [weitere]

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 370-374

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Trace analysis ; On-column injection ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: Large sample volume on-column injection (up to 250 μL) of n-pentane solutions of halogenated hydrocarbons has been employed for the direct measurement of both low-boiling and high-boiling compounds in what is essentially a single run. Two-bonded phase, fused-silica capillary columns are joined in series, through which the low-boiling compounds are first chromatographed and detected with an electron capture detector. High-boiling compounds are then trapped in a section joining the two columns, and subsequently chromatographed in the second column, using the same detector. This procedure permits analysis at the ppt level.

Zusätzliches Material: 7 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070706

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Multidimensional capillary gas chromatography-enantiomeric separations of selected cuts using a chiral second column (1984)

Schomburg, G. ; Husamanm, H. ; Hübinger, E. ; [weitere]

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 404-410

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Multidimensional capillary columns ; Enantiomeric separations ; Intermediate trapping ; Mixed polarities ; Terpene alcohols ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Zusätzliches Material: 6 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070711

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Analysis of pesticide residues by high resolution gas chromatography. Part 2: Determination of fungicide and insecticide residues in various crops (1984)

Agneessens, R. ; Zenon-Roland, L. ; Nangniot, P.

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 533-536

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Capillary columns ; Fungicides and insecticides ; Sensitivity limits ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Zusätzliches Material: 4 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070909

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Determination by MS-MS of 1,1-dichlorodimethyl sulfone from pulp mill bleach plant effluents in aquatic organisms (1984)

Lindström, Krister ; Schubert, Ralf

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 68-73

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ISSN: 0935-6304

Schlagwort(e): MS-MS ; Gas chromatography ; Capillary GC-ECD, GC-MS, GC-MS-MS ; Bleaching ; Chlorine compounds ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: Gas chromatography (GC) with electron capture detection (ECD), GC combined with mass spectrometry (MS), GC with multi-stage mass spectometry (MS-MS), and direct inlet MS-MS have been used to determine 1,1-dichlorodimethyl sulfone (DDS) in aquatic organisms in the receiving waters outside a pulp mill bleach plant. Both GC-MS-MC and direct inlet MS-MS of tissue extracts of fish and mussel appear to be sensitive, selective, and rapid analytical techniques for the determination of DDS.

Zusätzliches Material: 8 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070204

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Selective determination of substituted PAH in aerosols using liquid CO2-extraction, HPLC prefractionation on chemically activated silica, and HRGC combined with negative ion mass spectrometryPresented in part at the 5th International Symposium on Capillary Gas Chromatography, Riva del Garda, Italy, 1983 and the VIIth International Symposium on Column Liquid Chromatography, Baden-Baden, 1983. (1984)

Stray, H. ; Manø, S. ; Mikalsen, A. ; [weitere]

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 74-82

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Capillary column ; HPLC prefractionation ; MS ; ECD ; Substituted PAHs ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: A method is described which allows the determination of different substituted polycyclic aromatic hydrocarbons (PAH) such as NO2-PAH, carbazoles, keto-PAH, and aza-arenes in aerosol samples. Liquid CO2-extraction is used to minimize the loss of reactive compounds. High performance liquid chromatography on chemically activated silica is employed to prefractionate the samples into subfractions with a minimum of overlap between different PAH compound classes. Both electron capture detection and negative ion chemical ionization combined with capillary gas chromatography are used for identification and quantification. The latter method also allows distinction between isomers with different toxic properties when N2O/CH4 reaction gas mixtures are used. Selectivity for tetrachlorodibenzo-p-dioxins as against pesticides and polychlorinated biphenyls can be improved by this technique. The applicability of the method is critically discussed and different examples are given.

Zusätzliches Material: 5 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070205

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Autocrosslinkable methyl-2-phenylethylpolysiloxane stationary phase for capillary column gas chromatography (1984)

Bradshaw, J. S. ; Crowley, S. J. ; Harper, C. W. ; [weitere]

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 89-92

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Capillary column ; Stationary phase ; Polysiloxane ; Autocrosslinkable ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: Methyl-2-phenylethylpolysiloxane polymers have been synthesized for comparison with methylphenylpolysiloxane stationary phases for gas chromatography. The 50% 2-phenylethyl polysiloxane was found to be autocrosslinkable at 260°C without addition of free redical initiator. Although the selectivity of this phase appears to be similar to the 50% phenyl polysiloxane, its thermal stability is not as high.

Zusätzliches Material: 2 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070207

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Solute focusing, using the solvent effect in capillary GLC: The solvent effect in the presence of stationary phase (1984)

Pretorius, V. ; Lawson, K. H. ; Rohwer, E. R. ; [weitere]

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 92-94

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Details

ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Capillary column ; Solute focusing ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Zusätzliches Material: 1 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070208

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Separation and analysis of 3-nitrobenzo[e]pyrene and 1-, 3-, and 6-nitrobenzo[a]pyrene via fused silica GC combined with negative ionization atmospheric pressure ionization mass spectrometry (1984)

Korfmacher, W. A. ; Fu, P. P. ; Chou, M. ; [weitere]

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 41-42

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Mass spectrometry ; Capillary GC ; Fused silica GC ; 6-Nitrobenzo[a]pyrene ; 3-Nitrobenzo[a]pyrene ; 1-Nitrobenzo[a]pyrene ; 3-Nitrobenzo[e]pyrene ; Nitro-PAHs ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Zusätzliches Material: 2 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070108

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51

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GC/MS analysis of chlorinated paraffins with negative ion chemical ionization (1984)

Müller, Markus D. ; Schmid, Peter P.

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 33-37

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ISSN: 0935-6304

Schlagwort(e): Chlorinated paraffins ; Gas chromatography ; Mass spectrometry ; Negative ion ; Chemical ionization ; Capillary column ; On-column injection ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: Although chlorinated paraffins (CP) are produced in large amounts (300 000 tonnes per year), little is known about their occurrence in the environment due to the lack of specific and sensitive analytical methods. The present paper describes the GC/MS analysis of different CP's using capillary gas chromatography with on-column injection and negative ion chemical ionization (NCI) mass spectrometry. Chromatographic resolution of groups of isomers and homologues was obtained. The chromatograms and mass spectra are discussed. The suitability of this method for trace analysis of a CP sample using multiple ion detection (MID) is described.

Zusätzliches Material: 3 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070106

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52

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Simple carrier gas flow controller unit for capillary GC with On-column injection (1984)

Takayama, Y.

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 48-48

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Capillary, glass ; Carrier gas flow controller unit ; On-column injection ; Sample, loading onto column ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Zusätzliches Material: 1 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070112

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53

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Isolation, concentration, and gas chromatographic determination of C4—C12 fatty acids in water and sludge (1984)

Janda, V. ; Pehal, F. ; Hrivňák, J.

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 540-541

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Capillary ; SDE enrichment ; Fatty acids ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Zusätzliches Material: 2 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070912

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Selective and non-selective sampling from precolumn separations - with emphasis on the sampling of aqueous solutionsPaper based on a poster presented at the Fifth International Symposium on Capillary Chromatography, Riva del Garda, Italy, April 26-28, 1983. (1984)

Schomburg, G. ; Bastian, E. ; Behlau, H. ; [weitere]

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 4-12

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Immobilized capillary columns ; Aqueous solutions ; On-column injection ; Split injection ; Multidimensional separations ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: Various methods of gas chromatographic analysis at high resolution and low detection limits in aqueous solutions are described with regard to sampling techniques, column technology, and the application of coupled pre-columns, also including multidimensional methods. Immobilized polyethylene glycol (Carbowax 20 M) columns have also been produced and used successfully.

Zusätzliches Material: 11 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070102

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55

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Polarizable biphenyl polysiloxane stationary phase for capillary column gas chromatography (1984)

Kuei, J. C. ; Shelton, J. I. ; Castle, L. W. ; [weitere]

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 13-18

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Capillary columns ; Biphenyl polysiloxane ; Stationary phase ; Polarizable phase ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: A crosslinkable biphenylmethylpolysiloxane stationary phase was synthesized for capillary column gas chromatography and compared with methyl, phenyl, and cyanopropyl polysiloxane stationary phases for the separation of isomeric polycyclic aromatic compounds. While the new phase gave similar separations of nonpolar isomers when compared to the nonpolar phases, separations of polar isomers were greatly improved because of the induced polarity of the biphenyl group of the stationary phase by the solute molecules. This polarizable stationary phase offers a unique selectivity which is not available in other stationary phases.

Zusätzliches Material: 5 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070103

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56

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Determination of biogenic quaternary ammonium compounds on fused silica capillary columns with a splitless injector as a chemical reactor/pyrolysis chamber (1984)

Findeis, P. M. ; Farwell, S. O.

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 19-24

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Capillary, fused silica ; Splitless injection ; Flash derivatization ; Quaternary ammonium compounds ; Acetylcholine ; Biogenic amines ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: A conventional splitless injector is used as a pyrolysis chamber or chemical reactor for the N-demethylation of acetylcholine and other choline esters. The novel uses of 2-aminoethanol as a N-demethylation reagent in splitless injection and bonded-phase fused silica capillary columns in the separation of the tertiary amine derivatives of choline esters are described. A comparison is made between non-polar and moderately polar fused silica capillary columns in the separation of choline esters.

Zusätzliches Material: 4 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070104

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57

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Organic micropollutants in the sewage from a phenoxyalkanoic acid production plant after biological treatment in a municipal trickling filters plant (1984)

Folke, Jens

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 25-32

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; CGC-ECD, CGC-MS ; Chlorophenols ; Chlorophenoxyalkanoic acids ; Neutral chlorinated compounds ; Biological sewage treatment plant ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: The environmentally hazardous organic substances in the waste water from the manufacture of chlorophenoxyalkanoic acids have been identified and semiquantified before and after passing through a biological treatment plant for municipal sewage, the secondary effluent of which is discharged into a marine ecosystem. The organics belong to three groups: (i) chlorophenols; (ii) chlorophenoxyalkanoic acids; and (iii) chlorinated neutrals. The removal of chlorophenols and phenoxyalkanoic acids was shown to be good, with a 90% overall reduction of chlorinated substances in the sewage passing through the treatment plant. The lowest reduction occurred for the polychlorinated compounds. Two chlorobenzofurans among the chlorinated neutrals were preliminarily identified.

Zusätzliches Material: 2 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070105

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58

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Improved capillary GC/MS interface (1984)

Giang, B. Y.

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 137-139

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Deactivated fused silica tubing ; Zero dead volume union ; Capillary column GC/MS interface ; Test mixture for non-polar columns ; Test mixture of phenols ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Zusätzliches Material: 3 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070307

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59

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Determination of cyclopentolate by capillary column gas-liquid chromatography (1984)

Andermann, G. ; Richard, A.

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 144-146

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Capillary column ; Cyclopentolate ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Zusätzliches Material: 3 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070310

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Trace analysis by simultaneous on-column injection/enrichment of massive sample volumes (1984)

Miller, R. J. ; Barringer, G. E.

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 148-150

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Capillary columns ; On-column injection/enrichment ; Milliliter sample volumes ; Trace analysis ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Zusätzliches Material: 2 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070312

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61

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Prediction of gas chromatographic retention indices of linear, branched, and cyclic alkanes from their physicochemical properties (1984)

Bermejo, J. ; Guillén, M. D.

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 191-195

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Saturated hydrocarbons ; Retention indices ; Molar refraction ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: Kováts retention indices for a series of linear, branched, and cyclic alkanes on squalane at any temperature, and on other stationary phases of different polarity at a given temperature, are related to physicochemical properties of the solutes, such as boiling point and molar refraction, by multiple regression analysis. The equations found permit calculation of the Kováts retention index for all alkanes, with standard deviations close to experimental error. The same equations can also be used for calculating the physicochemical parameters they contain.

Zusätzliches Material: 8 Tab.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070404

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62

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An experimental study of cooling during evaporation of liquid films (1984)

Pretorius, V. ; Apps, P. ; Rohwer, E. R. ; [weitere]

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 209-210

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Solvent effect ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Zusätzliches Material: 4 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070407

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The dynamic film concentrator - A new approach to large and dilute samples in GLC (1984)

Apps, P. J. ; Pretorius, V. ; Rohwer, E. R. ; [weitere]

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 212-214

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Trace analysis ; Solvent effect in GC ; Parts per trillion ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Zusätzliches Material: 3 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070409

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64

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Peak purity in analysis of polycyclic aromatic hydrocarbons by programmed-temperature capillary gas chromatography (1984)

Huynh, C. K. ; Vu Duc, T.

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 270-273

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Capillary column ; Temperature-programmed analysis ; Retention indices ; Polychclic aromatic hydrocarbons (PAH) ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Zusätzliches Material: 4 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070508

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Amino acid enantiomer separation for the detection of adulteration in fruit juices (1984)

Ooghe, W. ; Kasteleyn, H. ; Temmerman, I. ; [weitere]

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 284-285

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Capillary columns ; Fruit juices ; Amino acids ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Zusätzliches Material: 2 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070514

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66

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On the stability of polarity mixtures used in CGC (1984)

Temmerman, I. ; Sandra, P.

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 332-333

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Capillary columns ; Polarity mixtures ; Reaction products ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Zusätzliches Material: 1 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070609

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Increased speed of steroid analysis by capillary GC and GC-MS; effects of sample pretreatment and sample introdution (1984)

Curvers, J. ; Maris, F. ; Cramers, C. ; [weitere]

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 414-422

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Capillary columns ; Steroid analysis ; Sample pretreatment ; Sample introduction ; Separation speed ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: Quantitative analysis of steroids and their metabolites in urine samples calls for increased speed of sample clean-up, of the derivatization procedure, and of separation. A fast procedure for sample pretreatment, which can be performed within 8 hours, is introduced and evaluated. It is shown that use of fast pretreatment in combination with narrow bore columns, which are compatible with existing instrumentation, can considerably increase, laboratory throughput. The effect of different sample introduction techniques (e.g. splitless, on-column, and moving needle) on column efficiency and resolution is demonstrated and discussed.

Zusätzliches Material: 7 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070713

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68

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The analysis of C1—C4 alcohols, MTBE, and DIPE in motor gasolines by multi-dimensional capillary column gas chromatography (1984)

Johansen, N. G.

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 487-489

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Capillary column ; Multi-dimensional technique ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Zusätzliches Material: 4 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070809

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69

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Filter extraction in closed loop stripping analysis (CLSA) (1984)

Habich, A. ; Grob, K.

Weinheim : Wiley-Blackwell

Journal of High Resolution Chromatography 7 (1984), S. 492-494

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ISSN: 0935-6304

Schlagwort(e): Gas chromatography ; Capillary, glass ; Closed loop stripping analysis ; Filter extraction ; Chemistry ; Analytical Chemistry and Spectroscopy

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Zusätzliches Material: 2 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jhrc.1240070811

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Gas Chromatographic Separation of Enantiomers on Optically Active Metal-Complex-Free Stationary PhasesThe separation of enantiomers on optically active metal-complex stationary phases (“complexation gas chromatography”) will not be discussed here.. New Analytical Methods (24) (1984)

Schurig, Volker

Weinheim : Wiley-Blackwell

Angewandte Chemie International Edition in English 23 (1984), S. 747-765

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ISSN: 0570-0833

Schlagwort(e): Chiral resolution ; Analytical methods ; Gas chromatography ; Chemistry ; General Chemistry

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie

Notizen: If a stationary phase A employed in gas chromatography possesses a chemical affinity for substance B, which is to be separated, then the retention behavior is not only determined by the normal physical equilibrium between the gas and liquid phases but also by the chemical equilibrium A + B ⇋ AB. If A and B are chiral and A is present in optically active form while B is a racemic mixture, then it is possible to achieve a gas chromatographic enantiomer resolution without the isolation of diastereomers: the energetically different diastereomeric associates AR BR and AR BS are formed rapidly and reversibly. This enantiospecific resolution principle was first demonstrated in 1966 by the quantitative resolution of racemic amino acid derivatives on optically active peptide phases in analogy to the well-known stereospecificity of enzymes. The anchoring of the chiral resolving agent to thermally stable polysiloxanes together with the employment of high resolution capillary columns and the use of appropriate derivatization strategies has led to the development of enantiomer resolution into a routine modern method for many classes of substances. The demonstration of enantiospecificity in the gas chromatographic separation process is of fundamental interest, and its systematic study can result in a significant contribution to the understanding of the molecular mechanism of “chiral recognition”. The gas chromatographic separation of enantiomers has also proven to be an accurate and sensitive method for the determination of the enantiomeric composition of natural products and products of enantioselective transformations (asymmetric syntheses, “chiral pool” transformations, kinetic resolutions, biomimetic reactions) and for the quantification of racemization, e.g. in the synthesis and hydrolysis of peptides. In any research program devoted to the phenomenon of chirality, the gas chromatographic separation of the enantiomers of volatile compounds constitutes an indispensable modern instrumental technique.

Zusätzliches Material: 11 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/anie.198407473

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