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《Journal of Tea》 2003-01
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Lead concentration in teas and its safety tesing

TANG Chaqin ZENG Xiaowei LU Jianliang LIANG Yuerong (Tea Science Institute of Zhejiang University,Hangzhou 310029)  
85 tea samples were collected from various tea producing area in China, and lead concentration of these samples was studied using dithizone chromometer method. The results showed that the lead average concentration of these samples was 1.97 mg/kg, and that the sequence of lead level in different kinds of tea was pu'erjasmine teagreen teablack teaoolong teabrick tea. It was suggested that suitable plucking and steaming-fixation processing might decrease the lead level of tea.
【CateGory Index】: TS272
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