Analysis of hydroxy fatty acids as pentafluorobenzyl ester, trimethylsilyl ether derivatives by electron ionization gas chromatography/mass spectrometry
نویسندگان
چکیده
منابع مشابه
Identification of arachidonate epoxides/diols by capillary chromatography-mass spectrometry.
The identification of epoxide regioisomers of arachidonic acid (EETs) as methyl esters is difficult because they coelute during gas chromatography and possess similar mass spectra. In the present study, EETs and their hydrolysis products, dihydroxyeicosatrienoic acids (DHETs), were analyzed as pentafluorobenzyl ester derivatives and their properties were compared to other esters. The four EET r...
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Combined capillary gas-liquid chromatography-electron capture negative chemical ionization mass spectrometry of pentafluorobenzyl ester-TMSi ether derivatives of bile acids and isotope dilution using deuterated internal standards are introduced as a sensitive and selective analysis technique for plasma bile acids. As a result of the high ionization efficiency of pentafluorobenzyl derivatives un...
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The trimethylsilyl ethers of alditols with 3, 4, 5 and 6 carbon atoms were investigated. The mass spectra are unusually clearly correlated with the structures. The predominant fragmentations are cleavages in the carbon chain and rearrangement loss of trimethylsilanol. The spectra are closely related to those of the methyl ethers. A spectrum unambiguously identifies a compound as an alditol and ...
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ژورنال
عنوان ژورنال: Journal of the American Society for Mass Spectrometry
سال: 1995
ISSN: 1044-0305,1879-1123
DOI: 10.1016/1044-0305(94)00090-m