Determination and analysis of fluoride content in certa in tea
ZHONG Xi-qiong
FU Xiao-mei
DENG Tai-hao
Abstract：The fluoride content in some kinds of tea was determined by fluorine selective electrode method. The results showed the fluorine content in Pu\’er tea was relatively higher, the average value was among 180~240 mg·kg-1. While the fluorine content in Black tea was lower, the average value was between 80 ~105 mg·kg-1. The fluoride content in Laoshan green tea was relatively higher, up to 274.16 mg·kg-1, the other three Green tea was lower, such as Dinghushan pearled tea was 54.64 mg·kg-1. The fluorine content in Oolong tea had larger difference, the lowest was Chaoan unique bush, about 48.58 mg·kg-1; while Anxi tieguanyin was 818.46 mg·kg-1, it surpassed three times of the trade standard. The coefficient of variation of the method was among 1.19%- 7.37%, so this method was repeatable and suitable for analysis of large-scale samples.
Keywords：teafluorine contentfluorine ion selective electrode method
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 39-42 )