Triacylglycerols of winter butterfat containing configurational isomers of monoenoic fatty acyl residues. II. Saturated dimonoenoic triacylglycerols

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Triacylglycerols of Finnish winter butterfat containing one saturated and two monoenoic fatty acyl residues were studied. With silver ion high‐performance liquid chromatography (HPLC), molecules were separated according to the difference in the configuration of one fatty acyl moiety. The distribution of the saturatedcis,trans‐dimonoenoic and saturatedcis,cis‐dimonoenoic triacylglycerols according to their acyl carbon numbers was compared by means of reversed‐phase HPLC and tandem mass spectrometry. Furthermore, two examples of the fatty acid composition of a specified molecular weight species were shown. The fatty acid compositions of corresponding saturatedcis,trans‐dimonoenoic and saturatedcis,cis‐dimonoenoic triacylglycerols were similar; however, there may be differences in the proportions of different fatty acid combinations or in the distribution of fatty acids between primary and secondary glycerol positions.