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Preliminary study on the geographical origin of Chinese 'Cuiguan' pears using integrated stable isotope and multi-element analyses

文献类型： 外文期刊

作者： Zeng, Tingting 1 ; Fu, Tingting 1 ; Huang, Yongchuan 1 ; Zhang, Wei 1 ; Gong, Jiuping 1 ; Ji, Bingjing 1 ; Yang, Xiaoxia 1 ; Tang, Mingfeng 1 ;

作者机构： 1.Chongqing Acad Agr Sci, Inst Agr Qual Stand & Testing Technol, Chongqing 401329, Peoples R China

2.Minist Agr & Rural Affairs, Agr Prod Qual & Safety Supervis Inspect & Testing, Chongqing, Peoples R China

关键词： Pear; Geographical origin traceability; Stable isotope; Mineral elements

期刊名称：HELIYON （ 影响因子：3.6； 五年影响因子：3.9 ）

ISSN：

年卷期： 2024 年 10 卷 17 期

页码：

收录情况： SCI

摘要： Distinguish the geographical origin of the pear is important due to the increasingly valued brand protection and reducing the potential food safety risks. In this study, the profiles of stable isotopes (delta C-13, delta N-15, delta H-2, delta O-18) and the contents of 16 elements in pear peer from four production areas were analyzed. The delta C-13, delta N-15, delta H-2, delta O-18 and 12 elements were significantly different (p < 0.05) in the four production areas. Chemometrics analysis including principal component analysis (PCA), orthogonal partial least squares discriminant analysis (OPLS-DA) and linear discriminant analysis (LDA) were exploited for geographical origin classification of samples. OPLS-DA analysis showed that crucial variables (delta C-13, delta O-18, delta H-2, Ni, Cd, Ca, delta N-15, Sr and Ga) are more relevant for the discrimination of the samples. OPLS-DA achieved pear origin accuracy rates of 87.76 % by combining stable isotope ratios and elemental contents. LDA had a higher accuracy rate than OPLS-DA, and the LDA analysis showed that the original discrimination rate reached to 100 %, while the cross-validated rate reached to 95.7 %. These studies indicated that this method could be used to assess the geographical discrimination of pear from different producing areas and could potentially control the fair trade of pear in fruit markets

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