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Studies on trimethylsilyl derivatives of 1‐alkyl‐2‐acylglycerols by gas‐liquid chromatography mass spectrometry
Author(s) -
Satouchi Kiyoshi,
Saito Kunihiko
Publication year - 1976
Publication title -
biomedical mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 0306-042X
DOI - 10.1002/bms.1200030306
Subject(s) - chemistry , alkyl , trimethylsilyl , mass spectrometry , alkoxy group , mass spectrum , selected ion monitoring , fragmentation (computing) , gas chromatography , glyceride , ion , chromatography , organic chemistry , medicinal chemistry , gas chromatography–mass spectrometry , fatty acid , computer science , operating system
Trimethylsilyl derivatives of 1‐hexadecyl‐2‐decanoyl‐, ‐hexadecanoyl‐ and ‐octadecenoylglycerols and 1‐octadecyl‐2‐decanoyl‐, ‐hexadecanoyl‐ and ‐octadecenoylglycerols as well as 1,2‐dihexadecanoylglycerol were analysed by a gas chromatograph mass spectrometer system. The following points are characteristic of the fragmentation pattern of these 1‐alkyl‐2‐acyl derivatives: (1) in the spectra of alkyl acyl derivatives, ions at [M – 15] + and [M – 90] + ˙ are 14 mass units less than those of the corresponding diacyl derivatives; (2) the base peak is m / e 130; (3) alkyl acyl derivatives show fragments due to one acyl group instead of the two acyl groups of diacyl derivatives; (4) ions at m / e 314 and 342, [R 1 0 + 73] + ˙, are characteristic of the trimethylsilyl derivatives of hexadecyl‐ and octadecylglycerols, respectively; (5) the ion [M – R 1 0] + is present, but the complementary alkoxy ion is absent.