Recent techniques for the authentication of the geographical origin of tea leaves from camellia sinensis: A review.

Mengying Shuai, Chuanyi Peng, Huiliang Niu, Dongliang Shao, Ruyan Hou, Huimei Cai

Journal: Food chemistry 2022;374():131713

PMID: 34920400

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Abstract

Tea is one of the most important beverages worldwide, is produced in several distinct geographical regions, and is traded on the global market. The ability to determine the geographical origin of tea products helps to ensure authenticity and traceability. This paper reviews the recent research on authentication of tea using a combination of instrumental and chemometric methods. To determine the production region of a tea sample, instrumental methods based on analyzing isotope and mineral element contents are suitable because they are less affected by tea variety and processing methods. Chemometric analysis has proven to be a valuable method to identify tea. Principal component analysis (PCA) and linear discriminant analysis (LDA) are the most preferred methods for processing large amounts of data obtained through instrumental component analysis.

Address: State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Science and Technology, Anhui Agricultural University, Hefei 230036, PR China; Key Laboratory of Food Nutrition and Safety, School of Tea and Food Science and Technology, Anhui Agricultural University, Hefei 230036, PR China.; State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Science and Technology, Anhui Agricultural University, Hefei 230036, PR China.; Anhui Guoke Testing Technology Co Ltd, Hefei 230036, PR China.; State Key Laboratory of Tea Plant Biology and Utilization, School of Tea and Food Science and Technology, Anhui Agricultural University, Hefei 230036, PR China; Key Laboratory of Food Nutrition and Safety, School of Tea and Food Science and Technology, Anhui Agricultural University, Hefei 230036, PR China. Electronic address: [email protected].

DOI: 10.1016/j.foodchem.2021.131713

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MeSH Terms: Camellia sinensis, Chemometrics, Discriminant Analysis, Plant Leaves, Principal Component Analysis, Tea