Identification of Carbonyl Compounds in Transesterified Fats Detection in Milk Fat

Abstract

The non-glyceridic fraction of fats transesterified in the presence of Na-K alloy, and the unsaponifiable fraction of these fats were studied by chromatographic methods. α-Diketones derived from the fatty acids components have been found to be the main by-products of the non-glyceridic fraction, mono-ketones being also present as minor products. These α-dike tones are destroyed during alkaline hydrolysis and when the unsaponifiable fraction is studied, monoketones are found as the main components. On the basis of these findings a method for detecting transesterified fats in natural fats, particularly in milk fat, is proposed.