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Fluoride in tea from Shandong Province, China and exposure assessment.
Food Additives & Contaminants: Part B ( IF 2.5 ) Pub Date : 2020-01-05 , DOI: 10.1080/19393210.2019.1710267 Lijun Shao 1 , Shiming Xu 2 , Guoling Wang 1 , Luping Yang 1 , Renpeng Li 1 , Jing Zhu 3 , Jindong Chen 1 , Dafeng Jiang 1
Food Additives & Contaminants: Part B ( IF 2.5 ) Pub Date : 2020-01-05 , DOI: 10.1080/19393210.2019.1710267 Lijun Shao 1 , Shiming Xu 2 , Guoling Wang 1 , Luping Yang 1 , Renpeng Li 1 , Jing Zhu 3 , Jindong Chen 1 , Dafeng Jiang 1
Affiliation
In this study fluoride in 170 tea samples from Shandong province (China) was determined using a selective ion electrode. The fluoride concentrations ranged from 31.2 to 338 mg/kg with an average of 119 mg/kg. The mean fluoride concentrations were 164, 121, 98.7 and 96.8 mg/kg, which corresponded to Pu'erh tea, green tea, oolong tea and black tea, respectively. Moreover, 4.7% of the analysed samples exceed the legal limit of 200 mg/kg recommended by China. The estimated daily intake of fluoride via drinking tea for an adult was between 0.655 and 1.07 mg/person/day, which were lower than the provisional maximum tolerable daily intake value of 3.5 mg/person/day set by the National Health and Family Planning Commission of the People's Republic of China. In future, maintaining a surveillance programme to monitor the trend of fluoride in tea is necessary for food safety and human health.
更新日期：2020-01-05
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