Summary
A gas chromatographic method for the analysis of water solutions of the lowest fatty acids has been described, with special reference to the separation of the system water-formic acid-acetic acid. The optimum conditions are: 20% by weight of di-2-ethyl-hexyl sebacate-citric acid mixture (1∶3), coated on silanised (trimethyl chlorsilane) Celite; temperature 110° C, thermal-conductivity detection. The method has been used for testing the composition of pure fatty acids and of technical acetic acid from wood distillation products.
Zusammenfassung
Ein Verfahren zur gaschromatographischen Analyse wäßriger Lösungen der niedersten Fettsäuren wurde beschrieben, vor allem zur Trennung des Systems Wasser-Ameisensäure-Essigsäure. Die besten Arbeitsbedingungensind: 20 Gew. -% Di-2-äthylhexylsebacinat-Zitronensäure-Gemisch (1 zu 3) auf silamsiertem (Trimethylchlorsilan) Celit; 110° C, Nachweis durch Wärmeleitfähigkeitsmessung. Das Verfahren wurde zur Prüfung reiner Fettsäuren und von technischer Essigsäure aus Holzdestillaten verwendet.
Résumé
On décrit une méthode de Chromatographie en phase gazeuse pour l'analyse des solutions aqueuses d'acides gras inférieurs, en prêtant particulièrement attention à la séparation du système eau-acide formique-acide acétique. Les conditions optimales sont: 20% en poids du mélange sébacate de diéthyl-2 hexyle-acide citrique (1∶3), enduit sur de la célite silanisée (triméthylchlorosilane); température 110° C; détection par conductivité thermique. La méthode a été utilisée pour contrôler la composition des acides gras purs et celle de l'acide acétique technique provenant des produits de distillation du bois.
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Dedicated to the 60th birthday of Prof. Dr.M. Jureček.
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Kaplanová, B., Janák, J. Direct gas chromatographic analysis of lower fatty acids with particular respect to the separation of water, formic acid, and acetic acid. Mikrochim Acta 54, 119–125 (1966). https://doi.org/10.1007/BF01217440
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DOI: https://doi.org/10.1007/BF01217440