Quality assessment and geographical origin classification of extra-virgin olive oils imported into China

文献类型： 外文期刊

第一作者： Li, Xue

作者： Li, Xue;Zhang, Yu;Liu, Zhi;Wang, Wei;Sun, Sulin;Wang, Junhong;Zhu, Zuoyi;Li, Xue;Zhang, Yu;Liu, Zhi;Wang, Wei;Yang, Hua;Zhu, Shenlong;Niu, Erli;Liu, Zhi;Liu, Jun;Agusti, Romero

作者机构：

关键词： EVOOs; Fatty acids; Triacyglycerols; Food quality; Origin authenticity; Chemometrics

期刊名称：JOURNAL OF FOOD COMPOSITION AND ANALYSIS （ 影响因子：4.52； 五年影响因子：4.942 ）

ISSN： 0889-1575

年卷期： 2022 年 113 卷

页码：

收录情况： SCI

摘要： Extra-virgin olive oil (EVOO) is an important imported commercial product in China. This study comprehen-sively evaluated the quality of EVOOs imported from different countries into China based on chemical param-eters and sensory attributes. Multivariate statistics were used to authenticate their geographical origins. 71.8% of the oils failed to meet the current official standards at inland and abroad established for commercial EVOO category. Pyropheophytin, defect attributes, peroxide value, and K270 were above the limits in 32%, 24%, 23%, and 5% of the failed samples respectively, while free acidity, K232 and delta K were above the limits in 4%. Fatty acids and delta ECN42 were beyond the limits in 2% of the failed samples. Linear discriminant analysis (LDA) and orthogonal partial least squares discriminant analysis (OPLS-DA) based on fatty acids and triacyglycerols succeeded in identifying the origin of olive oils. 3.5% of the total might be mislabelled the geographical origin. The main quality problems of the analyzed oils include oxidation, counterfeiting with refined oils and origin fraud. Considering the results and the fact that most EVOOs in China are imported from other countries, che-mometrics combined with critical quality attributes should be an ideal way of EVOO quality control, protecting consumers from frauds.

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