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  • Gas chromatography
  • Springer  (24)
  • American Chemical Society
  • 2005-2009
  • 1990-1994  (24)
  • 1980-1984
  • 1925-1929
  • 1990  (24)
Collection
Keywords
Publisher
Years
  • 2005-2009
  • 1990-1994  (24)
  • 1980-1984
  • 1925-1929
Year
  • 1
    Electronic Resource
    Electronic Resource
    A routine gas chromatographic method for the analysis of chlorofluorocarbons in aerosol cans (1990)
    Springer
    Chromatographia 29 (1990), S. 13-15 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Mass spectrometery ; Aerosol cans ; Chlorofluorocarbons
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A gas chromatographic (GC) method for the routine analysis of fully halogenated chlorofluorocarbons (CFCs) in aerosol cans is described. The identification of CFCs by GC was found to be in full agreement with those by GC-mass-spectrometery. The method has been applied to the analysis of CFCs in 448 aerosol products. The most commonly used fully halogenated CFC propellants in aerosol cans were found to be CFC11, CFC12 and CFC114.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02261131
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  • 2
    Electronic Resource
    Electronic Resource
    Improved gas chromatographic separation of C6 epoxides (1990)
    Springer
    Chromatographia 29 (1990), S. 322-324 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; C6 epoxides ; Retention indices
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The separation of C6 epoxides on a fused-silica capillary column coated with Permaphase DMS (dimethylsilicone) was investigated. Retention indices were determined at 50 and 60°C. We demonstrate that this stationary phase provides a better resolving power than OV-101.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02261297
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  • 3
    Electronic Resource
    Electronic Resource
    The glass insert in stop-flow split injection (1990)
    Springer
    Chromatographia 29 (1990), S. 385-388 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Capillary columns ; Split injector design ; Glass inserts
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary In stop-flow split injection the careful choice of the experimental conditions is of great importance for accurate quantitation, the size of the gaseous sample plug and its position with respect to the column inlet and to the top of the insert during the evaporation period are critical to prohibit sample vapour overflow and aerosol splitting. The proper insert design is established. A sample volume of 0.5 μl is recommended in the practical application of the stop-flow method.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02261307
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  • 4
    Electronic Resource
    Electronic Resource
    A comparative study of different multiresidue methods for the determination of pesticides in fruit samples by gas chromatography (1990)
    Springer
    Chromatographia 29 (1990), S. 459-466 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Pesticide analysis ; Multiresidue methods ; Solvent extraction schemes ; Fruit samples
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A comparative study of different multiresidue methods for the determination of organochlorine and organophosphorus pesticides in fruit samples has been carried out. Recoveries for each pesticide added to a peach sample were obtained after applying different extraction systems. The study was performed with the following pesticides: dimethoate, chlorpyrifos, fenitrothion, lindane, malathion, methidathion, phentoate and tetradifon. Extraction systems induded: acetonitrile+anhydrous sodium sulphate, acetonitrile-water+Celite acetone and acetone-methanol. Determination of pesticides was performed by gas capillary chromatography with ECD and NPD. GC/FPD and GC/MS were also used for confirmation and identification purposes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02261395
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  • 5
    Electronic Resource
    Electronic Resource
    Quality control and classification of camomilla oils with the oxygen-sensitive flame-ionization detector (1990)
    Springer
    Chromatographia 30 (1990), S. 47-50 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Selective detection ; Oxygen flame ionization detector ; Camomilla oils
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The application of the Oxygenate Analyzer (O-FID) developed for the selective determination of oxygenated compounds has been studied for the quality control and classification of camomilla oils. In comparison to FID detection the O-FID results in a simpler chromatogram and a much higher sensitivity for the characteristic oxygenated compounds. On the basis of the O-FID chromatograms, by measuring the relative peak areas of the characteristic compounds, the camomilla oils can be classified and the oils of unacceptable quality unambigously distinguished.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02270447
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  • 6
    Electronic Resource
    Electronic Resource
    The retention mechanism in poly(ethylene glycol) 20M layer on the surface of a silanized support (1990)
    Springer
    Chromatographia 30 (1990), S. 630-634 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Poly(ethylene glycol) 20M ; Silanized supports ; Retention mechanisms
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The properties of poly(ethylene glycol) 20M (PEG 20M) on the silanized surface of Chromosorb W HMDS were investigated. It was found that the surface layer of PEG 20M is in a liquid form below its melting temperature. It the stationary phase loading ratio is above 0.105 the main retention mechanism is partition in both the liquid and solid forms of PEG 20M. The contribution of adsorption to the retention volume was also determined. It is suggested that in the case of methanol this contribution is caused by adsorption on the residual silanol groups present on the support surface whereas for n-octane this is rather adsorption on the gas-liquid interface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02269736
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  • 7
    Electronic Resource
    Electronic Resource
    Dependence of solution data at ideal dilution on solvent molecular size (1990)
    Springer
    Chromatographia 30 (1990), S. 493-499 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Chemical potential of solutes ; Ideal dilute solutions ; Effect of size of solvent molecule
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Gas-liquid chromatography allows the rapid experimental determination of the Henry coefficient of molecular probes if a number of precautions are taken. From a knowledge of the temperature dependence of the related standard chemical potential, the standard partial molar enthalpy, entropy and the mean heat capacity difference can be calculated. These functions determine the retention behaviour of the probe over a temperature range of more than 100 K with a precision better than 1%. They also give the necessary information to verify and to develop models for ideal dilute solutions and for the calculation of interaction forces. The choice of specific solvents is examined and justified and the experimental determination of retention data is discussed especially with reference to the precautions to observe in order to measure retention governed by gas-liquid partition only. Calculation of the standard chemical potential related to the molal Henry coefficient is advocated and the dependence of the standard chemical potential on size and shape of the solvent molecule based on data collected on paraffinic stationary phases is examined. This latter function is shown to depend linearly on the inverse of the molar mass of the solvent. Comparison with literature data demonstrates the general validity of this finding and that the shape of the solvent molecule is of less importance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02269794
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  • 8
    Electronic Resource
    Electronic Resource
    Determination of carbofuran in a nutrient solution by GLC/NPD and HPLC (1990)
    Springer
    Chromatographia 30 (1990), S. 421-423 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Column liquid chromatography ; Carbofuran ; Hydroponics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Two analytical methods using GC/NPD and HPLC to analyse carbofuran in a nutrient solution used in hydroponic culture are described. Both methods show a high recovery, (greater than 90%), and their limits of detection are low.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02328509
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  • 9
    Electronic Resource
    Electronic Resource
    Fluoride determination in fluorinated milk by headspace gas chromatography (1990)
    Springer
    Chromatographia 29 (1990), S. 544-546 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Headspace sampling ; Fluoride in milk ; Trifluorosilane derivative
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A new method was developed for the determination of fluoride in fluorinated milk on the basis of headspace gas chromatography utilizing, the reaction between trimethylchlorosilane and ion-bound fluorine in highly acidic media. The obtained trifluorosilane has a high volatility and can be easily determined by headspace gas chromatography.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02261219
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  • 10
    Electronic Resource
    Electronic Resource
    Benzene emission comparisons by gas chromatography of leaded versus unleaded and “gasohol” versus straight-hydrocarbon fuel vapors (1990)
    Springer
    Chromatographia 29 (1990), S. 603-605 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Leaded fuels ; Unleaded fuels ; Gasohol ; Straight-hydrocarbon fuels
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary It has been theorized that the removal of lead in fuels may result in an increase of fuel volatility. In addition, alcohols added to fuels (“gasohols”) increase volatility. Consequently, benzene emissions in unleaded and gasohol vapors may be increasing. Flame ionization detection gas chromatography was used to analyze benzene concentrations in fuel vapors. Results indicated that leaded fuels emitted more benzene than unleaded fuels. Though benzene concentrations varied for unleaded vapors, leaded gasohol fuels had higher benzene levels than their straight-hydrocarbon counterparts. These higher benzene emission levels may be an indication that volatility increases in leaded and some gasohol brands.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02261231
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  • 11
    Electronic Resource
    Electronic Resource
    Application of selectivity tuning in series-coupled capillary GC columns for the exact quantification of the quenching effect in FPD detection (1990)
    Springer
    Chromatographia 29 (1990), S. 115-119 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; FPD-Detection ; Sulfur compounds ; Quenching effects ; Series-coupled columns
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary In a series-coupled system of two capillary columns with different polarity, a controlled overlapping of sulphur-containing and sulphur-free compounds can be achieved by means of different mid-point pressure settings. By means of this selectivity tuning it is possible to measure exactly the quenching of the flame photometric detector signal for a sulphur compound coeluted with an excess of a sulphur-free compound. With the example of a complex sample it is shown that, with a suitable system of columns, selectivity tuning can give quench-free FPD chromatograms or chromatograms with quench-free regions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02268695
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  • 12
    Electronic Resource
    Electronic Resource
    Effect of adsorption on the retention values in glass capillary columns coated with poly(ethylene glycol) 20M (1990)
    Springer
    Chromatographia 30 (1990), S. 635-638 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Retention values ; Adsorption ; Glass capillary columns
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Effect of adsorption on the retention values for some n-alkanes, n-alcohols and esters in glass capillary columns coated with PEG-20M was studied. Adsorption parameters for the used solutes were evaluated from the retention data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02269737
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  • 13
    Electronic Resource
    Electronic Resource
    Theoretical interpretation of the retention indices of alkylbenzenes (1990)
    Springer
    Chromatographia 30 (1990), S. 144-148 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Retention index calculation ; Alkylbenzenes ; Structure-retention relationships
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The correlation between retention data of alkylbenzenes in GLC (measured on the stationary phase OV-101) and contribution of the Gibbs solvation energy are investigated in order to determine the dominant factor controlling retention. The retention in GLC can be predicted with help of our thermodynamic retention model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02274536
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  • 14
    Electronic Resource
    Electronic Resource
    Fluorine-induced chemiluminescence detection of biologically methylated tellurium, selenium, and sulfur compounds (1990)
    Springer
    Chromatographia 30 (1990), S. 181-185 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Chemiluminescence detection ; Se, Te and S compounds ; Speciation of elements ; Headspace analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The sensitive detection of volatile, methylated selenium and tellurium compounds based on capillary gas chromatography coupled to fluorine-induced chemiluminescence detection is described. The method requires no sample derivatization, and the detection limits for selenides and tellurides (low pg range) are the lowest reported to date. This technique can resolve and speciate complex mixtures of methylated tellurium, selenium, and sulfur gases and is useful for analysis of selenium and tellurium gases in environmental samples that also contain usually interfering reduced sulfur gases. Applications of the technique for analysis of bacterial and fungal headspace samples are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02274543
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  • 15
    Electronic Resource
    Electronic Resource
    The role of adsorption in gas-liquid systems and its use for enrichment of trace amounts (1990)
    Springer
    Chromatographia 30 (1990), S. 489-492 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Trace enrichment in gases ; Adsorption effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02269793
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  • 16
    Electronic Resource
    Electronic Resource
    Reproducibility of retention indices measurement of alkylbenzenes on crosslinked methyl silicone phase fused silica capillaries (1990)
    Springer
    Chromatographia 30 (1990), S. 328-332 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Retention index reproducibility ; Alkylbenzenes ; HP PONA columns ; OV-101 glass capillary columns
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Reproducibility of the Kovats retention indices of alkylbenzenes was studied on conventional “PONA” fused-silica capillary columns coated with crosslinked dimethyl silicone phase, with a film thickness of 0.5 μm. The data were compared with those obtained on conventional OV-101 columns. The tested PONA columns showed reproducible chromatographic properties, capacity ratios and high efficiencies. Having a standard deviation of s=0.03 i.u. of the retention indices on a single column, the column-to-columns differences were found to be up to 0.3 i.u. Higher indices were determined for crosslinked columns, the difference being in most cases about one i.u.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02319717
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  • 17
    Electronic Resource
    Electronic Resource
    The micro-trap: An alternative to cryofocussing in capillary gas chromatography (1990)
    Springer
    Chromatographia 29 (1990), S. 571-574 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Capillary columns ; Micro-trap ; Trace analysis ; Airborne halocarbons
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary For routine analyses involving numerous samples or for field operation of on-site instruments, cryogenic traps are inconvenient: their operation is timeconsuming and automation is technically demanding. complete trapping and efficient band-focussing may be achieved at ambient temperature with micro-traps packed with suitable sorbents. Two approaches have been evaluated: if the boiling points of the analytes are within a range of about 100°C, a single-sorbent trap and direct coupling to the column are recommended; for samples containing components wih widely different volatilities, a trap composed of two or more segments with complementary affinties and coupling to the chromatographic column under carrier-gas flow-reversion is preferable. The procedure has been evaluated for airborne C1 and C2-halocarbons; it is also applicable to trace analysis of other volatile organic air pollutants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02261224
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  • 18
    Electronic Resource
    Electronic Resource
    Effect of adsorption on the retention values in glass capillary columns coated with OV-101 (1990)
    Springer
    Chromatographia 29 (1990), S. 575-578 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Retention values ; Adorption effects ; Glass capillary columns
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Effect of adsorption on the retention values for C5−C10 alkanes and C1−C8 n-alcohols in glass capillary columns coated with OV-101 is investigated. Adsorption parameters are evaluated from the retention data
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02261225
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  • 19
    Electronic Resource
    Electronic Resource
    Quantitative GC determination of carbon monoxide by calibration via the production of CO from formic acid (1990)
    Springer
    Chromatographia 29 (1990), S. 347-350 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Quantitative determination of carbon monoxide ; In-situ generation of standards
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Carbon monoxide, produced from the dehydration of formic acid in the presence of sulfuric acid is proposed for the quantitative determination of the gas in the parts-per-million range. In this method the standard solution of formic acid in acidified water is introduced with a total-volume syringe from the injector and passes through a precolumn packed with sulfuric acid on diatomite support. The produced carbon monoxide is converted to methane over nickel and determined with a flame-ionization detector. The accuracy of this method is about 5% in the experimental range.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02261301
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  • 20
    Electronic Resource
    Electronic Resource
    Detection of new radiolysis products in γ-irradiated, methanolic medazepam by GC-FTIR (1990)
    Springer
    Chromatographia 30 (1990), S. 255-262 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; FTIR ; γ-Irradiation sterilization ; Medazepam ; 1,4-Benzodiazepines
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A methanolic solution of 2% medazepam was irradiated with a dose of 50 kGy. A capillary gas chromatograph with a Fourier Transformation Infrared Spectrophotometer (FTIR) was used to investigate the radiolysis products in the solution. The changed products found earlier were confirmed and new ones identified. The radiolytic scheme can be improved and enlarged.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02319703
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  • 21
    Electronic Resource
    Electronic Resource
    Determination of melissyl alcohol by capillary column gas chromatography (1990)
    Springer
    Chromatographia 30 (1990), S. 267-270 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Split injection ; Insert packing material ; Melissyl alcohol
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary For accurate determination of polar, high-boiling melissyl alcohol in mixtures containing also low-boiling components by capillary column gas chromatography with hot split injection, all experimental paramenters, such as the injection procedure, insert size and design, injector temperature, sample size, solvent and carrier gas nature, etc. must be optimized. Of the factors affecting the quantitation the nature of the insert packing material is of the greatest importance. With the commonly used packing material, quartz wool, in the insert, a much lower than true melissyl alcohol concentration was obtained. Accurate quantitation was only possible when stop-flow injection, together with an insert packed with glass beads was used.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02319705
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  • 22
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    The system of universal retention indices and aspects of its application in gas chromatography (1990)
    Springer
    Chromatographia 30 (1990), S. 163-170 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Universal retention index ; Classification of stationary phases ; Identification
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The universal retention index has been developed on the basis of a critical analysis of the forms of chromatographic retention data presentation. Methods are presented for the determination of the universal retention index. The advantages of the universal retention index system in the evaluation of the selectivity and classification of stationary phases and in the determination of the composition of binary and polynary stationary phases are discussed. The thermodynamic aspect of the suggested system of chromatographic retention data presentation is also considered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02274540
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  • 23
    Electronic Resource
    Electronic Resource
    Measurement of the adduction constant by gas-liquid chromatography (1990)
    Springer
    Chromatographia 30 (1990), S. 211-214 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Determination of adduction contant ; Enthalpies and entropies
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The adduction constants for the following eight binary systems were measured by gas liquid chromatography, at different temperatures: tetrachloromethane/p-xylene, tetrachloromethane/pseudocumene, chloroform/p-xylene, chloroform/pseudocumene, chloroform/aniline, m-methylphenol/aniline, o-methylphenol/aniline, and o-chlorophenol/aniline. The relationships between the adduction constant and temperature were used to fit the enthalpies and entropies of adduct formation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02274549
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  • 24
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    Trans-esterification of fatty acids from microorganisms and human blood serum by trimethylsulfonium hydroxide (TMSH) for GC analysis (1990)
    Springer
    Chromatographia 30 (1990), S. 245-248 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Trimethylsulfonium hydroxide (TMSH) ; FAME analysis ; Bacteria ; Blood serum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Trimethylsulfonium hydroxide (TMSH) can convert fatty acids into the corresponding fatty acid methyl esters (FAMEs) in a single step. These fatty acids may also be bound in biomolecules such as phospholipids and/or glycerides. Complex mixtures of saturated and unsaturated FAMEs which may contain hydroxy and cylopropyl groups are obtained by trans-esterification; they can easily be separated in most cases by capillary GC. When FAMEs are generated from different microorganisms e.g. bacteria the patterns of the chromatograms are characteristic. Examples of characteristic patterns of bacteria with different cell wall structures are shown. The described method of transesterification can also be applied directly to blood serum without sophisticated sample pretreatment. The profiles of the chromatograms match well those described in the literature obtained by other methods of trans-esterification or sample preparation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02319701
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