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A convenient analytical method using high-temperature gas chromatography for the determination of mono- and diacylglycerols, lipase-catalyzed cleavage products of triacylglycerol (TG), has been developed. In this study, analytical conditions were examined using triolein (TO), diolein (DO) and monoolein (MO) as standard materials. As a result, a trimethylsilyl(TMS) derivatization with N,O -bis(trimethylsilyl)acetamide and a well-programmed column temperature using a low polar capillary column permitted the regiospecific analysis of 1-MO, 2-MO, 1,2-DO and 1,3-DO. Solid-phase extraction using an aminopropyl silica cartridge was effective for the sequential treatment of lipase-catalyzed cleavage products of TO. A quantitative analysis became feasible by the use of tricaprin as an internal standard. It was suggested that the present method was useful for the analysis of a different manner of cleavage due to the different kinds of TGs and lipases.

Simple determination of lipase-catalyzed cleavage products of triacylglycerol by gas chromatography