植物油中不饱和醛作为特征氧化指标的适用性
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作者单位:

(1.仲恺农业工程学院轻工食品学院 广州 510225;2.仲恺农业工程学院现代农业创新研究院 广州 510225;3.深圳大学高等研究院 广东深圳 518000;4.华南理工大学食品科学与工程学院 广州 510225)

作者简介:

马路凯(1991—),博士,副教授

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基金项目:

国家重点研发计划项目(2018YFC1602101);国家自然科学基金项目(32001622,31771895);广东省重点研发项目(2019B020212001);广东省区域联合基金青年基金项目(2019A 1515110823);广州市科技特派员项目(GZKTP201937);广东省普通高校青年创新人才项目(KA2001957)


Applicability of Unsaturated Aldehyde in Vegetable Oil as Characteristic Oxidation Index
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(1.College of Light Industry and Food Science, Zhongkai University of Agricultural and Engineering, Guangzhou 510225;2.Academy of Contemporary Agricultural Engineering Innovations, Zhongkai University of Agricultural and Engineering, Guangzhou 510225;3.Institute for Advanced Study, Shenzhen University, Shenzhen 518000, Guangdong;4.School of Food Science and Engineering, South China University of Technology, Guangzhou 510225)

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    摘要:

    丙二醛(MDA)、4-羟基-2-壬烯醛(HNE)和4-羟基-2-己烯醛(HHE)是3种典型的非挥发性醛类物质,具有基因毒性,与多不饱和脂肪酸(PUFA)的氧化密切相关,在植物油和油基食品中普遍存在。目前关于其生成及与油脂品质相关性的研究较少。本文以我国常见的5种市售植物油为研究对象,借助Schaal加速氧化法探究植物油在模拟储藏过程中MDA、HHE和HNE的生成规律,并结合化学计量学方法探究三者作为评价油脂氧化指标的适用范围。结果表明:60 ℃贮藏30 d,3种醛的含量逐渐增加,不同植物油中其生成规律和分布规律差异显著(P < 0.05)。在受试植物油中均检测到MDA、HNE,亚麻油(LO)中MDA含量最高【(3.34±0.06)μg/g】,玉米油(CO)、菜籽油(RO)和LO中生成较多的HNE,含量分别为(3.70±0.08),(1.60±0.04)μg/g和(1.91±0.06)μg/g。HHE仅在RO和LO中检出,LO中HHE的含量最高【(4.46±0.07) μg/g】。利用主成分分析研究3种醛与传统氧化指标的相关性,结果表明:在PUFA含量较低的油脂中,MDA含量与氧化指标的相关性较差,而HNE和HHE与各氧化指标相关性高,可作为油脂氧化新的评价指标。

    Abstract:

    Malondialdehyde (MDA), 4-hydroxy-2-nonenal (HNE) and 4-hydroxy-2-hexenal (HHE) are three typical non-volatile aldehydes, which are genotoxic and closely related to the oxidation of polyunsaturated fatty acids(PUFA). They are common in vegetable oils and oil-based foods. However, there are few studies on their formation and correlation with oil quality. In this paper, five common commercial vegetable oils in China were selected as the research objects, and the formation rules of MDA, HHE and HNE in the simulated storage process of vegetable oils were explored by Schaal accelerated oxidation method. Combined with chemometrics method, the application scope of the three as evaluation indexes of oil oxidation was explored. The results showed that the contents of three aldehydes increased gradually during 30 days storage at 60 ℃, and the formation and distribution of aldehydes in different vegetable oils were significantly different (P<0.05). MDA and HNE were detected in all tested vegetable oils. The content of MDA in linseed oil (LO) was the highest [(3.34±0.06) μg/g], while more HNE was produced in corn oil (CO), rapeseed oil (RO) and linseed oil (LO), with the contents of (3.70±0.08), (1.60±0.04) μg/g and (1.91±0.06) μg/g, respectively. HHE was only detected in rapeseed oil (RO) and linseed oil (LO), and the content of HHE in linseed oil (LO) was the highest [(4.46±0.07) μg/g]. Principal component analysis was used to study the correlation between three aldehydes and traditional oxidation indexes. The results showed that the correlation between MDA content and oxidation indexes was poor in oils with low PUFA content, while HNE and HHE had high correlation with oxidation indexes, which could be used as new evaluation indexes of oil oxidation.

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马路凯,崔芸,刘漩,刘袆帆,陈海光,程威威,李琳琳,刘国琴,朱立学.植物油中不饱和醛作为特征氧化指标的适用性[J].中国食品学报,2022,22(5):239-248

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  • 收稿日期:2021-05-01
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  • 在线发布日期: 2022-06-15
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