数字农科院2.0

Chemical analysis combined with multivariate statistical methods to determine the geographical origin of milk from four regions in China

文献类型： 外文期刊

作者： Ruting Zhao;Meicheng Su;Yan Zhao;Gang Chen;Ailiang Chen;Shuming Yang

作者机构：

关键词： Fatty acids;Geographical origin;Isotopes;Milk;Mineral elements;Multivariate statistics

期刊名称： Foods

ISSN： 2304-8158

年卷期： 2021 年 10.0 卷 5.0 期

页码：

收录情况： JCR（2021版）

摘要： Traceability of milk origin in China is conducive to the implementation of the protection of regional products. In order to distinguish milk from different geographical distances in China, we traced the milk of eight farms in four neighboring provinces of China (Inner Mongolia autonomous region, Hebei, Ningxia Hui autonomous and Shaanxi), and multivariate data analysis was applied to the data including elemental analysis, stable isotope analysis and fatty acid analysis. In addition, orthogonal partial least squares discriminant analysis (OPLS-DA) is used to determine the optimal classification model, and it is explored whether the combination of different technologies is better than a single technical analysis. It was confirmed that in the inter-provincial samples, the combination of the two techniques was better than the analysis using a single technique (fatty acids: R2 = 0.716, Q2 = 0.614; fatty acid-binding isotopes: R2 = 0.760, Q2 = 0.635). At the same time, milk produced by farms with different distances of less than 11 km in each province was discriminated, and the discriminant distance was successfully reduced to 0.7 km (Ningxia Hui Autonomous Region: the distance between the two farms was 0.7 km, R2 = 0.771, Q2 = 0.631). For short-distance samples, the combination multiple technologies are not completely superior to a single technique, and sometimes, it is easy to cause model over-fitting. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

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