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  • Artikel  (24)
  • Gas chromatography  (24)
  • Springer  (24)
  • American Meteorological Society
  • Blackwell Publishing Ltd
  • Cambridge University Press
  • Institute of Physics
  • Springer Nature
  • 1990-1994
  • 1980-1984  (24)
  • 1965-1969
  • 1981  (24)
  • 1968
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  • Artikel  (24)
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  • Springer  (24)
  • American Meteorological Society
  • Blackwell Publishing Ltd
  • Cambridge University Press
  • Institute of Physics
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Erscheinungszeitraum
  • 1990-1994
  • 1980-1984  (24)
  • 1965-1969
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  • 1
    Digitale Medien
    Digitale Medien
    Chemically modified teflon wall-coated open tubular columns for gas chromatography (1981)
    Springer
    Chromatographia 14 (1981), S. 19-22 
    Details
    ISSN: 1612-1112
    Schlagwort(e): Teflon columns ; Chemically modified teflon ; Gas chromatography ; Capillary columns
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Summary Wall-coated open tubular columns prepared from chemically modified teflon tubing have been developed for gas chromatography. Chemical reaction of the inner walls of teflon tubing allows bonding of an adhesive layer on which a variety of stationary phaes can be coated. Test mixtures of alkanes and alcohols were used to investigate the chromatographic properties of these columns and the stability and mixing of the adhesive and stationary phae layers. the results in dicate that mixing of the layers is negligible and that the column is stable for a long period of time.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02262057
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  • 2
    Digitale Medien
    Digitale Medien
    Die Herstellung von Glas-Kapillarsäulen für die Gas-Chromatographie (1981)
    Springer
    Chromatographia 14 (1981), S. 55-66 
    Details
    ISSN: 1612-1112
    Schlagwort(e): Capillary columns, glass ; Gas chromatography ; Column preparation
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Beschreibung / Inhaltsverzeichnis: Zusammenfassung Kapillar-Gas-Chromatographie ist heute das sich am stärksten entwickelnde Gebiet der Gas-Chromatographie. Es gibt viele komplexe, neue Fragestellungen in der Analytik, welche den Einsatz spezieller Kapillarsäulen erfordem. Glücklicherweise gibt es aber auch eine große Zahl von Herstellungsverfahren für Kapillarsäulen, welche — noch mehr als bei der Herstellung von gepackten Säulen — eine Anpassung an die gestellten Aufgaben ermöglichen. In diesem Artikel werden die Herstellungsverfahren für Kapillarsäulen zusammengestellt und Anregungen gegeben, wie aufgaben-orientierte Säulen erreicht werden.
    Notizen: Summary Glass capillary column chromatography is the most rapidly growing part of gas chromatography. There are many complex new analytical tasks and they require special capillary columns, Fortunately there is a wide range of column preparation methods available, and they make the preparation of glass capillary columns a more varied job than that of packed columns. In this paper these methods are reviewed and suggestions are given for making task-oriented columns.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02262064
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  • 3
    Digitale Medien
    Digitale Medien
    Gas chromatographic analysis of phenylurea herbicides following catalytic hydrolysis on silica gel (1981)
    Springer
    Chromatographia 14 (1981), S. 579-586 
    Details
    ISSN: 1612-1112
    Schlagwort(e): Gas chromatography ; Urea herbicides ; Catalytic hydrolysis
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Summary A method is described for the rapid catalytic hydrolysis of phenylurea herbicides on silica gel at elevated temperatures. After derivatisation of the anilines produced with heptafluorobutyric acid anhydride final analysis is done on a gas chromatograph equipped with an electroncapture detector. Detection limits are in the 1–5 picogram range. The method has successfully been applied to residue analysis of water samples at the 1 ppb level. The determination of free anilines present in water samples and the potential of various techniques to be used to discriminate between free anilines and parent herbicides are also discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02262887
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  • 4
    Digitale Medien
    Digitale Medien
    Gas chromatographic analysis of water phenolic pollutants using acid-washed graphitised carbon black (1981)
    Springer
    Chromatographia 14 (1981), S. 86-88 
    Details
    ISSN: 1612-1112
    Schlagwort(e): Gas chromatography ; Graphitised carbon black ; Phenols ; Water pllutants
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Summary The fractionation of eleven phenols which may be contaminants in drinking water has been accomplished by using acid-washed graphitised carbon black modified with trimesic acid and PEG 20 M.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02279517
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  • 5
    Digitale Medien
    Digitale Medien
    Novel applications for headspace gas chromatography (1981)
    Springer
    Chromatographia 14 (1981), S. 447-451 
    Details
    ISSN: 1612-1112
    Schlagwort(e): Headspace analysis ; Gas chromatography ; Residual analysis of polyethylene terephthalate ; Acetylene reduction assay ; Ethylene evolution in germinating seed ; Acetaldehyde generation in polyester resin
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Summary New application areas for headspace gas chromatography in agricultural and polymer degradation research are described. Specific examples are drawn from the various forms of headspace analysis with emphasis on the automated static equilibrium method.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02263531
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  • 6
    Digitale Medien
    Digitale Medien
    The obstruction factor γ in gas chromatography (1981)
    Springer
    Chromatographia 14 (1981), S. 576-578 
    Details
    ISSN: 1612-1112
    Schlagwort(e): Gas chromatography ; Tortuosity factor
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Summary The relationship between the obstructive factor γ and velocity was restudied. The dependence of the obstructive factor on velocity was verified. The effects of diffusion coefficient and particle-to-column diameter ratio on the obstructive factor-velocity relationship were investigated. The results are consistent with Hawkes' hypothesis that values of γ at low velocities are averages over tightly packed and loosely packed domains while at high velocities they are weighted in favour of the loosely packed domains where there is more flow.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02262886
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  • 7
    Digitale Medien
    Digitale Medien
    Blending bulk dissolution and gas-liquid-adsorption with the mixing of two liquid stationary phases to increase selectivity (1981)
    Springer
    Chromatographia 14 (1981), S. 648-652 
    Details
    ISSN: 1612-1112
    Schlagwort(e): Gas chromatography ; Gas-liquid adsorption ; Bulk solution ; Mixed stationary phases
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Summary It is shown that the blending of some retention effects can make the resolution of complex mixtures on short classical columns as effective as on capillary columns.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02291105
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  • 8
    Digitale Medien
    Digitale Medien
    Headspace gas chromatographic determination of aromatic hydrocarbons in natural and waste water (1981)
    Springer
    Chromatographia 14 (1981), S. 699-703 
    Details
    ISSN: 1612-1112
    Schlagwort(e): Gas chromatography ; Headspace analysis ; Aromatic hydrocarbons ; Water analyses
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Summary The possibilities of using headspace analysis of aromatic hydrocarbon traces in aqueous solutions with changing values of the partition coefficients are discussed. A variant of headspace analysis of the simplest aromatic hydrocarbon in natural and waste water is described. It involves two-step gaseous extraction of a sample in vessels of varying volume before and after the equilibrium phase is replaced with a pure gas (air or nitrogen). This method permits to analyse 5–50 ml water samples with benzene and toluene contents varying from the ppb to the ppm range within an error not exceeding 155. The analysis time is about 1.5 h. The presence of non-volatile organic or mineral substances does not influence the determination. This method is unsuitable to heterogeneous systems (aqueous oil emulsions): before carrying out the analysis for the hydrocarbon content these systems have to be homogenized first.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02259458
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  • 9
    Digitale Medien
    Digitale Medien
    Factors affecting reproducibility in the manufacture of glass and siliceous glass open tubular (capillary) columns (1981)
    Springer
    Chromatographia 14 (1981), S. 484-487 
    Details
    ISSN: 1612-1112
    Schlagwort(e): Gas chromatography ; Open tubular (capillary) columns ; Glass columns ; Fused-silica columns ; Column testing
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Summary Column characteristics affecting the chromatographic behavior of glass and siliceous glass (“fused silica”) capillary columns include the dimensional uniformity of the column, the physical and chemical characteristics of the column wall and the characteristics of the liquid phase. In the case of the coated column the uniformity and thickness of the liquid phase film are the most important criteria affecting column reproducibility. The paper discusses these factors and their influence on column performance.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02263539
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  • 10
    Digitale Medien
    Digitale Medien
    Analysis of complex industrial samples by gas chromatography; a report on selected past activities (1981)
    Springer
    Chromatographia 14 (1981), S. 203-211 
    Details
    ISSN: 1612-1112
    Schlagwort(e): Gas chromatography ; Quantitative analysis ; Copper oxide converter ; Inorganic gas analysis ; Determination of fluorine and oxygen ; Hydrocarbon analysis ; Wine analysis
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Summary A review of past activities concerning selected industrial analytical problems is given. This includes the following question: preparation of pure gas mixtures to be used for calibration, catalytic conversion of ester and pyridin samples to carbon dioxide and a one-point calibration method using peak heights, both for quantitative analysis, analysis of gas mixtures containing fluorine and inorganic fluorine compounds and the determination of the oxygen and fluorine content of the sample, separation and identification of hydrocarbons in shale oil and petroleum fraction samples, and analysis of wine.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02260153
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