Monitoring the authenticity of pu'er tea via chemometric analysis of multielements and stable isotopes
文献类型： 外文期刊
作者： Liu, Hong-Lin 1 ; Zeng, Yi-Tao 3 ; Zhao, Xin 2 ; Ye, Yu-Long 4 ; Wang, Bei 1 ; Tong, Hua-Rong 1 ;
作者机构： 1.Southwest Univ, Coll Food Sci, Chongqing 400715, Peoples R China
2.Chongqing Univ Educ, Chongqing Engn Res Ctr Funct Food, Chongqing Collaborat Innovat Ctr Funct Food, Chongqing Engn Lab Res & Dev Funct Food, Chongqing 400067, Peoples R China
3.Chongqing Furen High Sch, Chongqing 400067, Peoples R China
4.Sichuan Acad Agr Sci, Tea Res Inst, Chengdu 610066, Sichuan, Peoples R China
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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