Monitoring the authenticity of pu'er tea via chemometric analysis of multielements and stable isotopes

文献类型： 外文期刊

第一作者： Liu, Hong-Lin

作者： Liu, Hong-Lin;Wang, Bei;Tong, Hua-Rong;Liu, Hong-Lin;Zhao, Xin;Zeng, Yi-Tao;Ye, Yu-Long

作者机构：

关键词： Chemometrics; ICP-MS; ICP-OES; Multi-element and stable isotope fingerprinting; Production year; Pu'er tea; Quality control

期刊名称：FOOD RESEARCH INTERNATIONAL （ 影响因子：6.475； 五年影响因子：6.508 ）

ISSN： 0963-9969

年卷期： 2020 年 136 卷

页码：

收录情况： SCI

摘要： Mineral elements and stable isotopes combined with stoichiometric methods were used as a potential tool for first authenticating Chinese tea according to it's production year. A total of 86 mineral elements and stable isotope compositions were determined from the Xiangzhujing Pu'er tea in five different production years using ICP-MS and ICP-OES. On the basis of 78 statistically significant mineral elements and stable isotopes, HCA, PCA, PLS-DA, BP-ANN, and LDA were employed to build authentication models for predicting the Pu'er tea with different production years. The clustering results of the HCA and PCA were worse than that of PLS-DA, BP-ANN, and LDA. The PLS-DA model displayed a perfect model performance ((RX)-X-2 = 0.86, (RY)-Y-2 = 0.974, and Q(2) = 0.922). The authentication performance of LDA and BP-ANN revealed their 100% recognition sensitivity and prediction ability and was thus better than that of PLS-DA. Mn, Zn-68, and Tl-203 were the markers for enabling the successful authentication of Pu'er tea with different production years. This study contributes toward generalizing the use of mineral element and stable isotope fingerprinting combined with LDA and BP-ANN as a promising tool for authentication of tea worldwide.

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