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Characterization of Volatile Compounds with HS-SPME from Oxidized n-3 PUFA Rich Oils via Rancimat Tests

Authors :
Po-Yuan Chiang
Li-Yun Lin
Chin-Yin Tseng
Ming-Ching Cheng
Kai-Min Yang
Chih-Wei Chen
Source :
Journal of Oleo Science. 66:113-122
Publication Year :
2017
Publisher :
Japan Oil Chemists' Society, 2017.

Abstract

Algae oil and fish oil are n-3 PUFA mainstream commercial products. The various sources for the stability of n-3 PUFA oxidation are influenced by the fatty acid composition, extraction and refined processing. In this study, the oil stability index (OSI) occurs within 2.3 to 7.6 hours with three different n-3 PUFA rich oil. To set the OSI in the Rancimat test as the oil stability limit and observed various degrees of oxidation (0, 25, 50, 75, 100 and 125%). The volatile oxidation compounds were analyzed via headspace-solid phase microextraction (HS-SPME) and GC/MS. We detected 51 volatile compound variations during the oxidation, which were composed of aldehydes, hydrocarbons, cyclic compounds, alcohols, benzene compounds, ketones, furans, ester and pyrrolidine. The off-flavor characteristics can be strongly influenced by the synergy effects of volatile oxidation compounds. Chemometric analysis (PCA and AHC) was applied to identify the sensitive oxidation marker compounds, which included a (E,E)-2,4-heptadienal appropriate marker, via lipid oxidation in the n-3 PUFA rich oil.

Details

ISSN :
13473352 and 13458957
Volume :
66
Database :
OpenAIRE
Journal :
Journal of Oleo Science
Accession number :
edsair.doi.dedup.....6d5d638beb456da9da2eb7efcb49f4b2