Multielemental Analysis Associated with Chemometric Techniques for Geographical Origin Discrimination of Tea Leaves (<i>Camelia sinensis</i>) in Guizhou Province, SW China
This study aimed to construct objective and accurate geographical discriminant models for tea leaves based on multielement concentrations in combination with chemometrics tools. Forty mineral elements in 87 tea samples from three growing regions in Guizhou Province (China), namely Meitan and Fenggan...
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doaj-22cb5cdf5a94472882b8641393c7487c2020-11-25T01:18:23ZengMDPI AGMolecules1420-30492018-11-012311301310.3390/molecules23113013molecules23113013Multielemental Analysis Associated with Chemometric Techniques for Geographical Origin Discrimination of Tea Leaves (<i>Camelia sinensis</i>) in Guizhou Province, SW ChinaJian Zhang0Ruidong Yang1Rong Chen2Yuncong C. Li3Yishu Peng4Chunlin Liu5College of Resource and Environmental Engineering, Guizhou University, Guiyang 550025, ChinaCollege of Resource and Environmental Engineering, Guizhou University, Guiyang 550025, ChinaCollege of Mining, Guizhou University, Guiyang 550025, ChinaDepartment of Soil and Water Sciences, Tropical Research and Education Center, IFAS, University of Florida, Homestead, FL 33031, USACollege of Resource and Environmental Engineering, Guizhou University, Guiyang 550025, ChinaCollege of Resource and Environmental Engineering, Guizhou University, Guiyang 550025, ChinaThis study aimed to construct objective and accurate geographical discriminant models for tea leaves based on multielement concentrations in combination with chemometrics tools. Forty mineral elements in 87 tea samples from three growing regions in Guizhou Province (China), namely Meitan and Fenggang (MTFG), Anshun (AS) and Leishan (LS) were analyzed. Chemometrics evaluations were conducted using a one-way analysis of variance (ANOVA), principal component analysis (PCA), linear discriminant analysis (LDA), and orthogonal partial least squares discriminant analysis (OPLS-DA). The results showed that the concentrations of the 28 elements were significantly different among the three regions (<i>p</i> < 0.05). The correct classification rates for the 87 tea samples were 98.9% for LDA and 100% for OPLS-DA. The variable importance in the projection (VIP) values ranged between 1.01⁻1.73 for 11 elements (Sb, Pb, K, As, S, Bi, U, P, Ca, Na, and Cr), which can be used as important indicators for geographical origin identification of tea samples. In conclusion, multielement analysis coupled with chemometrics can be useful for geographical origin identification of tea leaves.https://www.mdpi.com/1420-3049/23/11/3013tea leavesmultielementICP-MSchemometricsgeographical origin discrimination |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jian Zhang Ruidong Yang Rong Chen Yuncong C. Li Yishu Peng Chunlin Liu |
spellingShingle |
Jian Zhang Ruidong Yang Rong Chen Yuncong C. Li Yishu Peng Chunlin Liu Multielemental Analysis Associated with Chemometric Techniques for Geographical Origin Discrimination of Tea Leaves (<i>Camelia sinensis</i>) in Guizhou Province, SW China Molecules tea leaves multielement ICP-MS chemometrics geographical origin discrimination |
author_facet |
Jian Zhang Ruidong Yang Rong Chen Yuncong C. Li Yishu Peng Chunlin Liu |
author_sort |
Jian Zhang |
title |
Multielemental Analysis Associated with Chemometric Techniques for Geographical Origin Discrimination of Tea Leaves (<i>Camelia sinensis</i>) in Guizhou Province, SW China |
title_short |
Multielemental Analysis Associated with Chemometric Techniques for Geographical Origin Discrimination of Tea Leaves (<i>Camelia sinensis</i>) in Guizhou Province, SW China |
title_full |
Multielemental Analysis Associated with Chemometric Techniques for Geographical Origin Discrimination of Tea Leaves (<i>Camelia sinensis</i>) in Guizhou Province, SW China |
title_fullStr |
Multielemental Analysis Associated with Chemometric Techniques for Geographical Origin Discrimination of Tea Leaves (<i>Camelia sinensis</i>) in Guizhou Province, SW China |
title_full_unstemmed |
Multielemental Analysis Associated with Chemometric Techniques for Geographical Origin Discrimination of Tea Leaves (<i>Camelia sinensis</i>) in Guizhou Province, SW China |
title_sort |
multielemental analysis associated with chemometric techniques for geographical origin discrimination of tea leaves (<i>camelia sinensis</i>) in guizhou province, sw china |
publisher |
MDPI AG |
series |
Molecules |
issn |
1420-3049 |
publishDate |
2018-11-01 |
description |
This study aimed to construct objective and accurate geographical discriminant models for tea leaves based on multielement concentrations in combination with chemometrics tools. Forty mineral elements in 87 tea samples from three growing regions in Guizhou Province (China), namely Meitan and Fenggang (MTFG), Anshun (AS) and Leishan (LS) were analyzed. Chemometrics evaluations were conducted using a one-way analysis of variance (ANOVA), principal component analysis (PCA), linear discriminant analysis (LDA), and orthogonal partial least squares discriminant analysis (OPLS-DA). The results showed that the concentrations of the 28 elements were significantly different among the three regions (<i>p</i> < 0.05). The correct classification rates for the 87 tea samples were 98.9% for LDA and 100% for OPLS-DA. The variable importance in the projection (VIP) values ranged between 1.01⁻1.73 for 11 elements (Sb, Pb, K, As, S, Bi, U, P, Ca, Na, and Cr), which can be used as important indicators for geographical origin identification of tea samples. In conclusion, multielement analysis coupled with chemometrics can be useful for geographical origin identification of tea leaves. |
topic |
tea leaves multielement ICP-MS chemometrics geographical origin discrimination |
url |
https://www.mdpi.com/1420-3049/23/11/3013 |
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