Pollution characteristics and health risk assessment of nine elementsin commercially available Kuding and Partridge tea leaves and their infusions in Hainan Province
YUN Fen, YE Hai-mei, HUANG Han
Hainan Provincial Center for Disease Control and Prevention, Haikou, Hainan 570203, China
Abstract：Objective To understand the content of nine kinds of elements, including Al, Cu, Mn, Cr, Cd, Pb, Ni, As and Hg in commercially available Kuding and Partridge tea leaves and their infusions in Hainan Province, and to assess health risks associated with drinking their infusions. Methods Commercially available Kuding and Partridge tea leaves were collected in Hainan Province during 2017-2018, and the content of the nine elements in their infusions were determined by inductively coupled plasma mass spectrometry after microwave digestion. Health risks from pollution of the elements in the leaves and their infusions were assessed using the targeted hazard quotient (THQ) and hazard index (HI) recommended by the United States Environmental Protection Agency (USEPA). Results The mean of Cd content in Kuding tea leaves was 5.46 mg/kg, with the exceeding standard rate of 82.0%, but the content of the nine elements in Partridge tea leaves was within the national maximum permissible limits. The content of Cd, Mn and Al in Kuding tea infusions and the content of Mn and Ni in Partridge tea infusions were allhigher than the national maximum permissible limits for drinking water, and the content of the above-mentioned elements in the tea infusions decreased with the increase of infusion times. The hazard index (HI) in Kuding tea leaves was 1.147, with a range of HI in the first infusion of tea to the third infusion of tea being 0.341-0.117. The HI in Partridge tea leaves was 0.346, with a range of HI in the first infusion of tea to the third infusion of tea being 0.314-0.132. Conclusion Tea drinkers should pour the first infusion of tea away. Sipping infusions of commercially available Kuding and Partridge tea in Hainan Province poses no significant health risks, but it is necessary to strengthen the monitoring on the content of Cd, As and Mn in Kuding tea leaves as well as Mn and As in Partridge tea leaves.
云奋, 叶海湄, 黄涵. 海南省市售苦丁茶和鹧鸪茶及茶汤中9种元素污染特征及健康风险评估[J]. 实用预防医学, 2021, 28(9): 1054-1058.
YUN Fen, YE Hai-mei, HUANG Han. Pollution characteristics and health risk assessment of nine elementsin commercially available Kuding and Partridge tea leaves and their infusions in Hainan Province. , 2021, 28(9): 1054-1058.
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2021, Vol. 28 
