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Simultaneous determination of 4-hydroxy-2-alkenals, lipid peroxidation toxic products

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Lipid peroxidation has been associated with cell injury and possible carcinogenecity, for the products can damage cellular membrane and DNA. Among the products formed from lipid peroxidation, 4-hydroxy-2-alkenals are the major components and have been suggested to play a role in cellular toxicity. However, the difficulties of the quantification due to their strong reactivity during laboratory procedures hinder the exposure measurement of the compounds. A novel detection method based on the conversion of 4-hydroxy-2-alkenals to stable diols and to subsequent ortho-esters has been developed. Simultaneous detection in a sensitive single-ion monitoring mode by GC/MS was carried out, monitoring m/z 129, which was the common fragment ion for the ortho-esters derived from 4-hydroxy-2-alkenals. The proposed method was used to quantify 4-hydroxy-2-nonenal in oils and in oxidized arachidonic acid.
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Keywords: 4-hydroxy-2-alkenals; HNE; HOE; lipid peroxidation; simultaneous detection

Document Type: Research Article

Publication date: April 1, 2003

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