Analysis of nonpolar lipophilic aldehydes/ketones in oxidized edible oils using HPLC-QqQ-MS for the evaluation of their parent fatty acids
Analysis of nonpolar lipophilic aldehydes/ketones in oxidized edible oils using HPLC-QqQ-MS for the evaluation of their parent fatty acids
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DOI：
10.1016/j.foodres.2014.08.042
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发表时间：
2014-10-01
影响因子：
8.1
通讯作者：
Deng, Ze-Yuan
中科院分区：
文献类型：
--
作者：
Cao, Jun;Zou, Xian-Guo;Deng, Ze-Yuan
以6种不同脂肪添加成分的食用油为研究对象，探讨了可能由母体脂肪酸加速氧化产生的非极性亲脂醛/酮类化合物。采用高效液相色谱-质谱联用技术对c2 ~ c10范围内的20种醛类和5种酮类进行了同时测定。主成分分析表明，醛羰基含量与油酸、亚油酸和α -亚麻酸初始含量之间存在密切关系。戊醛、己醛、己酮、庚醛、2-原己醛、2-庚烯醛、2-辛烯醛、2-壬烯醛和2,4-十烯醛是与亚油酸初始含量密切相关的关键羰基。乙醛、丙酮、丙醛、丁醛、2-戊烯醛、2-己烯醛、2,4-庚二烯醛和2,4-非二烯醛是与α -亚麻酸添加起始含量密切相关的关键指标，辛醛、辛酮、壬醛、壬酮、癸醛、癸酮和2-癸烯醛是与油酸起始含量相关的氧化指标。研究结果提供了食用油二次氧化产物的完整图景和母体脂肪添加的可能来源。(C) 2014 Elsevier Ltd.版权所有。
Six edible oils with different fatty add compositions were used to explore nonpolar lipophilic aldehydes/ketones produced by possible parent fatty acids after accelerated oxidation. Simultaneous determination of 20 aldehydes and five ketones within the C2-C10 range was carried out using HPLC-QqQ-MS technique. Close relationships among the amounts of aldehyde carbonyls and the initial contents of oleic, linoleic and alpha-linolenic acids were revealed by principal component analysis. Pentanal, hexanal, hexanone, heptanal, 2-propenal, 2-heptenal, 2-octenal, 2-nonenal and 2,4-decadienal were the key carbonyls in close association with the initial content of linoleic acid. Ethanal, acetone, propanal, butanal, 2-pentenal, 2-hexenal, 2,4-heptadienal and 2,4-nonadienal were the key markers closely related with the initial content of alpha-linolenic add. Furthermore, octanal, octanone, nonanal, nonanone, decanal, decanone and 2-decenal were the oxidation indexes linked to the initial content of oleic acid. The results provide a complete picture of secondary oxidation products in edible oils and possible source of parent fatty adds. (C) 2014 Elsevier Ltd. All rights reserved.