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Stable isotopic and elemental characteristics with chemometrics for the geographical origin authentication of Dendrobium officinale at two spatial scales

文献类型： 外文期刊

作者： Xiong, Feng 1 ; Yuan, Yuwei 2 ; Li, Chunlin 2 ; Lyu, Chaogeng 1 ; Wan, Xiufu 1 ; Nie, Jing 2 ; Li, Haiyan 3 ; Yang, Jian 1 ; Guo, Lanping 1 ;

作者机构： 1.China Acad Chinese Med Sci, Natl Resource Ctr Chinese Mat Med, State Key Lab Breeding Base Daodi Herbs, Beijing 100700, Peoples R China

2.Zhejiang Acad Agr Sci, Inst Agro Prod Safety & Nutr, Key Lab Informat Traceabil Agr Prod Agr & Rural Af, Hangzhou 310021, Peoples R China

3.China Acad Chinese Med Sci, Inst Informat Tradit Chinese Med, Beijing 100700, Peoples R China

关键词： SIR; Multi -element; D; officinale; Origin authentication; Spatial scales

期刊名称：LWT-FOOD SCIENCE AND TECHNOLOGY （ 影响因子：6.056； 五年影响因子：6.295 ）

ISSN： 0023-6438

年卷期： 2022 年 167 卷

页码：

收录情况： SCI

摘要： Dendrobium officinale Kimura et Migo (D. officinale) is a healthy tea with protected designation of origin labels, which requires of authenticating its geographical origin. Stable isotope ratios of 87Sr/86Sr, delta 13C, delta 15N, delta 2H, and delta 18O and 24 element contents of D. officinale in 379 samples from 11 sites in six provinces were compared at two spatial scales: regional scale among the six provinces, and local scale among six sites within Zhejiang province. 87Sr/86Sr, delta 13C, and Ca were significantly different only at regional scale, while Fe was different only at the local scale. Combined with chemometric methods such as Linear Discriminant Analysis and Random Forest high accuracies were obtained for the geographical origin authentication at both regional (100%) and local scale (98.81%). Moreover, ranks of variable importance differed between the regional and local scale discrimination. The top ten important variables at the regional scale were Zn, Sr, delta 2H, Ba, Mn, delta 15N, Cu, 87Sr/86Sr, Nd, Rb, while those at the local scale were Na, delta 15N, Cu, delta 2H, Zn, Ni, La, Rb, Nd, and Pb. This study established a stable isotope and element fingerprints dataset of D. officinale, provided potential authenticating methods, and revealed different variable importance ranks for the two scales.

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