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Analytical Problems in the Investigation of Unsaturated Acids Conversion I Determination of the Content of trans Isomers

✍ Scribed by Szczepańska, H. ;Chmielarz, B.

Publisher
John Wiley and Sons
Year
1982
Weight
556 KB
Volume
84
Category
Article
ISSN
0931-5985

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✦ Synopsis

Abstract

The paper discusses the methods suitable for serial investigations of vegetable oils modification by catalytic isomerization, which comprises geometrical and positional isomerization, as well as partial polymerization and cyclization of unsaturated acids. The first part discusses the methods relating to the determination of stereoisomers. Infrared spectrophotometric method is used for the determination of isolated and conjugated trans isomers total content. Gas chromatography method in packed columns filled with cyanosilicones is suitable for the determination of the trans bonds in monoenes, dienes and trienes. In further parts of the paper discussion on the selection of methods of determination of the total content of conjugated dienes, cyclic monomers and polymers is envisaged.

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✍ Szczepańska, H. ;Chmielarz, B. 📂 Article 📅 1983 🏛 John Wiley and Sons ⚖ 686 KB

The paper discusses the methods of determination of the position of unsaturated bonds in a chain of acids, the determination of the sum of conjugated unsaturated bonds and the composition of the fatty acids. The position of unsaturated bonds in acids of modified oils may be determined most quickly b