Article ID Journal Published Year Pages File Type
1188214 Food Chemistry 2007 8 Pages PDF
Abstract

A new sensitive HPLC–MS method for the detection of sterol oxidation products was developed. The method was developed and optimized with commercially available cholesterol oxidation products. MS detection was carried out with an ion-trap mass spectrometer using atmospheric pressure chemical ionization in positive ion mode. With this new method, both primary and secondary oxidation products of cholesterol and stigmasterol, including epoxides, could be detected. Applicability of the method was investigated using thermo-oxidized (180 °C) stigmasterol as a model compound. Formation and degradation of two hydroperoxides were observed and formation of eight secondary oxidation products quantitatively determined. In conclusion, this method proved to be a powerful tool for investigating oxidation mechanisms of sterols.

Related Topics
Physical Sciences and Engineering Chemistry Analytical Chemistry
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