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  • Gas chromatography  (73)
  • Springer  (73)
  • American Meteorological Society
  • Blackwell Publishing Ltd
  • International Union of Crystallography
  • Springer Nature
  • 1985-1989  (73)
  • 1975-1979
  • 1970-1974
  • 1960-1964
  • 1950-1954
  • 1988  (39)
  • 1986  (34)
Collection
Keywords
Publisher
  • Springer  (73)
  • American Meteorological Society
  • Blackwell Publishing Ltd
  • International Union of Crystallography
  • Springer Nature
    • +
Years
  • 1985-1989  (73)
  • 1975-1979
  • 1970-1974
  • 1960-1964
  • 1950-1954
Year
  • 1
    Electronic Resource
    Electronic Resource
    Synthesis of hydrocarbons under presumed prebiotic conditions using high-frequency discharge (1986)
    Springer
    Journal of molecular evolution 23 (1986), S. 113-118 
    Details
    ISSN: 1432-1432
    Keywords: Primordial terrestrial atmospheres ; CH4, C2H2, CO2 ; Prebiotic synthesis ; High-frequency discharge ; Hydrocarbons ; Gas chromatography ; Mass Spectrometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Various hydrocarbons were synthesized by high-frequency discharge in a primordial terrestrial model atmosphere. The products were extracted by benzene or methanol and analyzed by GC-MS. The mean carbon chain length of the hydrocarbons formed by the discharge through pure CH4 gas was less than 6. Benzene was also obtained. Some isomers were obtained for each of the hydrocarbons containing a given number of carbons. When a small amount of C2H2 was added to the CH4, longer chain compounds were formed, as compared with discharge in CH4 only. However, when the amount of C2H2 was increased, unextractable high molecular weight compounds were produced. The amounts of products decreased as the mixing ratio of CO2 to CH4 increased. No hydrocarbons were detected when the ratio of CO2/CH4 exceeded 1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02099905
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  • 2
    Electronic Resource
    Electronic Resource
    Determination of cyanogen and cyanogen chloride using gas chromatography with a flame ionisation detector (1986)
    Springer
    Chromatographia 21 (1986), S. 161-164 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Flame ionisation detection ; Cyanogen ; Cyanogen chloride
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The response of a flame ionisation detector (FID) to cyanogen ((CN)2) and cyanogen chloride (CNCI) has been studied. The lower limits of detection for (CN)2 and CNCl were 6×10−12 moles and 2×10−11 moles respectively. In a comparative study a thermal conductivity detector gave as its lower limit of detection for both (CN)2 and CNCl 4×10−11 moles. Both detectors showed excellent linearity over the range 0 to 10 micromoles. The ratio of the gradients of the FID calibrations (CN)2/CNCI were found to be approximately two suggesting the response depended on the cyanide group. The response and stability of the FID was investigated as a function of air and hydrogen flow-rates. The response increased with increasing air flow-rate for both (CN)2 and CNCI up to 300cm3min−1, thereafter no significant increase was observed. On raising the hydrogen flow from 10 to 25cm3min−1 only a slight increase in the sensitivity of the FID towards both (CN)2 and CNCI was observed. At higher flow rates the response for (CN)2 increased markedly whereas at the same flow rates the response for CNCI increased only slightly.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02311746
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  • 3
    Electronic Resource
    Electronic Resource
    Studies of adsorption and solution of acetylacetonates of Cr(III), Co(III) and Al(III) by gas chromatography (1986)
    Springer
    Chromatographia 21 (1986), S. 214-218 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Behaviour of metal acetylacetonates ; Adsorption isotherms ; Heat of solution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Specific retention volumes, adsorption isotherms, molar heats of solution and changes of the entropy were determined from chromatographic data, which was obtained by the gas chromatographic separation of metal acetylacetonates. The retention data for Cr(III), Co(III) and Al(III) acetylacetonates were measured at different temperatures and different flow rates. From the retention data other values associated with adsorption and solution phenomena were calculated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02311889
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  • 4
    Electronic Resource
    Electronic Resource
    Immobilized stationary phase on the basis of polyethylene glycol cross-linked with pluriisocyanates of the Desmodur type (1986)
    Springer
    Chromatographia 21 (1986), S. 454-460 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Capillary columns ; Immobilized stationary phase ; Carbowax-type stationary phase ; Cross-linked polyurethane
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The preparation of an immobilized stationary phase based on Carbowax 20M is described. The stationary phase cross-linking was carried out with Desmodur N 75 or Desmodur L 75, pluriisocyanates. The properties of the prepared stationary phases are compared.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02341270
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  • 5
    Electronic Resource
    Electronic Resource
    Some improvements in the determination of volatile nitrosamines by fused silica capillary-GC in combination with a thermal energy analyzer (1986)
    Springer
    Chromatographia 22 (1986), S. 65-72 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Volatile nitrosamines ; Fused silica capillary columns ; Linear indices
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Fused silica capillary columns of different diameters and polarities are linked to a thermal energy analyzer and a flame ionisation detector for comparison. Extra column effects are discussed. Unsymmetrical homologue nitrosamines are applied in order to assign the volatile nitrosamines most often to be determined by their linear indices rather than by their overall retention times.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02257301
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  • 6
    Electronic Resource
    Electronic Resource
    The use of carbon monoxide and water gas as the flame-forming agent in the thermionic detector (1986)
    Springer
    Chromatographia 22 (1986), S. 95-98 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Thermionic detector ; Flame-forming agents ; CO2 and water gas
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The use of carbon monoxide were suggested as the flame-forming agent in the thermionic detector (TID). The main characteristics of this detector were studied. It was shown that the optimum flow rate of carbon monoxide is 40 ml/min at an air flow rate of 400–550 ml/min. The response increases twice with the positive potential on the collector. Molar responses of TID were compared with those obtained when using carbon monoxide and hydrogen. For instance, for phosphorus containing compounds they are approximately the same (∼102), while for nitrogen containing compounds in the case of carbon monoxide, there is a 2–5 fold increase in the response. The linear dynamic range for methaphose and azobenzene is 103.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02257307
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  • 7
    Electronic Resource
    Electronic Resource
    Investigation of the interaction of olefin-bonded transition metal complexes by gas chromatography. II. Phosphine complexes of Cu(II) (1986)
    Springer
    Chromatographia 22 (1986), S. 147-152 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Metal complexes ; Chemically bonded phase ; Specific interactions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Packings consisting of chemically bonded diphenylphosphine complexes with CuCl2 and CuBr2 were synthesized and their retention parameters determined. The packings investigated are capable of specific interactions with electron-donating compounds and are characterized by particularly high selectivity in relation to cis and trans isomers allowing their complete separation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02257316
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  • 8
    Electronic Resource
    Electronic Resource
    Mixed micropacked columns designed for selective separation of fermentation products (1986)
    Springer
    Chromatographia 22 (1986), S. 358-362 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Micropacked columns ; Quantitation ; Fermentation products
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A new method is proposed for the analysis by gas chromatography of volatile compounds found in alcoholic and acetic fermentation samples. The method represents a suitable choice for the accurate and precise determination of 19 compounds (including Methanol) by direct injection onto a single column. Chromatograms of synthetic mixtures as well as actual samples show the capabilities of the micropacked column used.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02268790
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  • 9
    Electronic Resource
    Electronic Resource
    Simultaneous distillation-extraction (SDE) method in the qualitative and quantitative GC analysis of cheese volatile components (1988)
    Springer
    Chromatographia 25 (1988), S. 861-864 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Simultaneous distillation-extraction ; Cheese volatiles
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary A simultaneous distillation-extraction apparatus proposed by Godefroot has been used for the GC study of volatile components of cheese. 5–10 g of cheese provide a fraction that can be directly injected into a GC or a GC/MS. Two capillary columns (SE-30 and SP-1000) were evaluated, the second one being adequate for quantitative determinations. Camphor was used as internal standard. The coefficients of variation ranged from 1.4 to 11.8. The technique can be used as a fast method for the characterization of cheeses from their volatile component concentrations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02311418
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  • 10
    Electronic Resource
    Electronic Resource
    Slope of the log plot of adjusted retention time against carbon number for various homologues serices (1988)
    Springer
    Chromatographia 25 (1988), S. 1087-1088 
    Details
    ISSN: 1612-1112
    Keywords: Gas chromatography ; Log plot ; Homologous series
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The slope of the log plot of the adjusted retention time of a homologous series usually varies from that of the n-alkane series by no more than 2%, though with unusual interactions between the functional group and the stationary phase the difference may be as high as 7%.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02259389
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