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  • Computer chemistry  (1)
  • Mass spectrometry  (1)
  • Pre-column  (1)
  • 1
    ISSN: 1612-1112
    Keywords: Capillary gas chromatography ; Natural products ; Citrus analysis ; Pre-separation by gel-permeation ; Pre-column
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Gaschromatographie von Naturstoffen wird durch nicht-flüchtige Anteile sehr erschwert. Störungen erfolgen durch Krackung und Katalysatorwirkung im Einspritzblock, Geisterpeaks und Grundlinienversatz. Mittels einer einfachen Gelchromatographie-Vortrennung wird eine Verbesserung der Citrusölanalytik beschrieben. Werden die höhermolekularen Stoffe nicht benötigt, kann man diese durch Verwendung einer Vorsäule am Gaschromatographen ausschalten. Ein einfacher Umbau am GC Gerät wird angegeben.
    Notes: Summary GC separation of natural products is upset by nonvolatile compounds. The problems arise from thermal and catalytic cracking in the injector, from ghost peaks and base line drift. A treatment is shown for obtaining an improvement in citrus analysis by using simple gelpermeation chromatography for pre-separation. A second method describes the separation of the high relative molecular mass compounds with a pre-column GC-equipment. A simple conversion is demonstrated for this modification of GC apparatus.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 11 (1972), S. 357-366 
    ISSN: 0570-0833
    Keywords: Computer chemistry ; Mass spectrometry ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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