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Licensed Unlicensed Requires Authentication Published by De Gruyter 2016 (Print 1990)

Determination of Ester-Emulsifiers Components Content After Hydrolysis and Silylation by Gas Chromatography: Results of a Collaborative Study and the Standardised Method

  • H. Brüschweiler and A. Hautfenne

Abstract

A method for the gas chromatographic determination of the components of ester-emulsifiers has been elaborated and tested in a collaborative study.

The method involves saponification of the ester-emulsifiers in ethanolic KOH solution, evaporation of the alcohol, silylation of the products of hydrolysis and determination of the components either by packed or capillary gas chromatography. The emulsifiers analysed in this study were mono- and digly cerides, diacetyl tartaric acid ester of mono- and diglycerides and sorbitan monostearate in oil (coconut oil). Emulsifiers present in oil were preliminarily separated by column chromatography.

The hydrolysis-silylation procedure described is applicable not only for the characterization and quantification of functional components of ester-emulsifiers, but also for oils, fats, wax esters and other hydrolysable lipids.

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