Novel Approach To Evaluate the Oxidation State of Vegetable Oils Using Characteristic Oxidation Indicators
Novel Approach To Evaluate the Oxidation State of Vegetable Oils Using Characteristic Oxidation Indicators
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使用特征氧化指示剂评估植物油氧化态的新方法
DOI：
10.1021/jf5047656
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发表时间：
2014-12-31
影响因子：
6.1
通讯作者：
Deng, Ze-Yuan
中科院分区：
文献类型：
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作者：
Cao, Jun;Deng, Long;Deng, Ze-Yuan
选取4种具有典型脂肪酸组成的植物油，在加速氧化条件下测定其脂肪氧化指标。加速氧化35d时，总氧化值(TOTOX，R2=0.89~0.97)和过氧化值(POV，R2=0.92~0.97)与非极性羰基总量呈良好的线性关系。此外，茶油(主要是油酸)中的壬醛含量显著增加，并与TOX(21.6TOX-595，R2=0.92)呈线性相关，紫苏油(主要是亚麻酸)中的丙醛显著增加，与TOX(8.10TOX+75.0，R2=0.90)呈线性相关。葵花籽油(主要是亚油酸)和棕榈油(主要是棕榈酸和油酸)中的己醛(分别为9.56TOTOX+913，R2=0.90和7.10TOTOX+342，R2=0.78)和壬醛(分别为10.5TOTOX+691，R2=0.95和6.65TOX+276，R2=0.84)也与TOTOX有良好的线性关系。结合这四种醛的变化规律，发现其氧化稳定性的大小顺序为葵花油<；山茶油<；紫苏油<；棕榈油，与POV、TOX和总非极性羰基的顺序相同。结果表明，正庚醛、正丙醛、己醛、正庚醛四种醛可作为四种油脂的氧化指示剂。
Four vegetable oils with typical fatty acid compositions were chosen to determine their indicators of lipid oxidation under the conditions of accelerated oxidation. Good linear correlations were observed between the total nonpolar carbonyl amount and the total oxidation value (TOTOX,R2= 0.89–0.97) or peroxide value (POV,R2= 0.92–0.97) during 35 days of accelerated oxidation. Additionally, nonanal in camellia oil (oleic acid mainly) increased significantly, and correlated linearly with TOTOX (21.6 TOTOX – 595,R2= 0.92); propanal increased significantly in perilla oil (linolenic acid mainly) and correlated linearly with TOTOX (8.10 TOTOX + 75.0,R2= 0.90). Hexanal (9.56 TOTOX + 913,R2= 0.90, and 7.10 TOTOX + 342,R2= 0.78, respectively) and nonenal (10.5 TOTOX + 691,R2= 0.95, and 6.65 TOTOX + 276,R2= 0.84, respectively) in sunflower oil (linoleic acid mainly) and palm oil (palmitic and oleic acids mainly) also had good linear correlations with TOTOX. Considering the change patterns of these four aldehydes, it was found that the oxidation stability was in the order sunflower oil < camellia oil < perilla oil < palm oil, which was same as POV, TOTOX, and total nonpolar carbonyls. It was concluded that the four aldehydes nonanal, propanal, hexanal, and nonenal could be used as oxidation indicators for the four types of oils.