GB/T 46928-2025 Animal and vegetable fats and oils—Determination of monoacylglycerols,diacylglycerols,triacylglycerols and glycerol—High-performance size-exclusion chromatography(HPSEC)

Scope

This document describes a method for determining glycerol monoester, glycerol diester, glycerol triester, and glycerol in animal and vegetable oils using high-performance size-exclusion chromatography.
This document is applicable to animal and vegetable oil products with glycerol monoester and glycerol diester as the main components and a content of >10%, and glycerol triester content of <20%. When the glycerol ester mixture is based on oleic acid and capric acid, only the content of glycerol monoester and glycerol can be determined.
This document is not applicable to milk fats or oils with a wide range of fatty acid chain lengths, as the molecular weight of glycerol diester of short-chain fatty acids is lower than that of glycerol monoester of long-chain fatty acids.

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