Mass-spectrometric behavior of oxidized triacylglycerols and their TMS derivatives
The mass spectrometric fragmentation of oxidized triacylglycerols of castor oil and their TMS derivatives have been studied for the first time. Three types of fragmentary ions have been detected: 1) products of the successive elimination of TMSOH; 2) ions characteristic for unoxidized triacylglycerols; and 3) products of the cleavage of C-C bonds present in the α-positions to the TMSO groups, which are characteristic for these hydroxy acid derivatives. The origin of these ions has been confirmed by measurements of elementary composition and by the analysis of MD spectra. The specific cleavage of the C-C bonds in the α-positions to the OTMS (OH) groups permits the mass-spectrometric method to be proposed for the analysis of mixtures of oxidized triacylglycerols.
KeywordsRicinoleic Acid Successive Elimination Methyl Ricinoleate Native Triacylglycerols Ricinoleic Acid Derivative
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