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Discriminating protected geographical indication Chinese Jinxiang garlic from other origins using stable isotopes and chemometrics

文献类型： 外文期刊

作者： Nie, Jing 1 ; Shao, Shengzhi 1 ; Zhang, Yongzhi 2 ; Li, Chunlin 1 ; Liu, Zhi 3 ; Rogers, Karyne M. 1 ; Wu, Ming-Chee 5 ;

作者机构： 1.State Key Lab Managing Biot & Chem Threats Qual &, Hangzhou 310021, Peoples R China

2.Zhejiang Acad Agr Sci, Inst Qual & Stand Agr Prod, 198 Shiqiao Rd, Hangzhou 310021, Peoples R China

3.Hunan Univ Humanities Sci & Technol, Coll Agr & Biotechnol, Loudi 417000, Peoples R China

4.GNS Sci, Natl Isotope Ctr, Lower Hutt 5040, New Zealand

5.Natl Cheng Kung Univ, Dept Earth Sci, Tainan 70101, Taiwan

关键词： Garlic; Geographical origin; Stable isotopes; Protected geographical indication; Traceability; Chemometrics

期刊名称：JOURNAL OF FOOD COMPOSITION AND ANALYSIS （ 影响因子：4.556； 五年影响因子：4.89 ）

ISSN： 0889-1575

年卷期： 2021 年 99 卷

页码：

收录情况： SCI

摘要： Jinxiang garlic is a well-known commodity with protected geographical indication (PGI) status in China and is also registered PGI in the European Union. A stable isotope profile (C-13, N-15, H-2, O-18, and S-34) was used to construct a discrimination model to differentiate PGI Jinxiang garlic from other major garlic export countries (Argentina and Southeast Asian countries; Thailand and Vietnam), as well as garlic produced in other Chinese provinces (Guizhou and Hainan). Results showed that there were no significant isotope differences for Jinxiang garlic sampled from 13 towns across the county, especially for delta N-15 and delta H-2. delta O-18 value was not a suitable classification variable for origin, but delta H-2, delta N-15, and delta S-34 values were found to be useful to characterize garlic origin. Chemometrics showed pair-wise partial least squares discriminant analysis (PLS-DA) model was an appropriate method to distinguish Jinxiang garlic from other locations, with a total discriminant accuracy of more than 89.5 % and 100% classification of PGI Jinxiang garlic. This study has potential to provide a suitable traceability method to authenticate Jinxiang garlic with PGI status in international markets.

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