Concentration and exposure of rare earth elements in brick tea and green tea from southeast of Hubei Province
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(Hubei Provincial Center for Disease Control and Prevention,Hubei Provincial Key Laboratory for Applied Toxicology,Hubei Wuhan 430079,China)

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    Abstract:

    This study aims to investigate the rare earth elements (REEs) levels in brick tea and green tea, and estimate the intakes of REEs to the tea consumption population.Methods Altogether 30 tea samples were collected from southeast of Hubei Province. REEs in brick tea and green tea were detected by microwave digestion and inductively coupled plasma mass spectrometry. Results The concentration of REEs in brick tea and green tea were 4.09-8.01 and 0.53-1.42 mg/kg, respectively, and the content of REEs in the brick tea which were made by older tea leaves was significantly higher than green tea. Ce, La, Nd, Y and Sc were the main elements among 16 REEs, all together accounting for 82.60% (4.51/5.46) in brick tea and 88.12% (0.89/1.01) in green tea. Conclusion In the average exposure level, the exposure of REEs from green tea and brick tea were 0.05 and 0.27 μg/kg BW. In the high exposure level, the exposure of REEs from green tea and brick tea were 0.17 and 0.91 μg/kg BW. All the exposure were less than the current advised ADI values.

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ZHOU Yan, WEN Sheng, ZHANG Ying, YANG Han, ZHENG Xiao-jie, HUANG Wen-yao. Concentration and exposure of rare earth elements in brick tea and green tea from southeast of Hubei Province[J].中国食品卫生杂志,2015,27(6):683-686.

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History
  • Received:September 11,2015
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  • Online: December 14,2015
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