Determination of Total Fluoride in Brick Tea with Oxygen Bomb Combustion-Standard and Fluoride Ion Additive Selective Electrode Method

WANG Xian-yang; LI Lu-ling

doi:10.13305/j.cnki.jts.2006.03.010

PDF(338 KB)

Journal of Tea Science ›› 2006, Vol. 26 ›› Issue (3) : 204-208. DOI: 10.13305/j.cnki.jts.2006.03.010

Determination of Total Fluoride in Brick Tea with Oxygen Bomb Combustion-Standard and Fluoride Ion Additive Selective Electrode Method

WANG Xian-yang, LI Lu-ling

Author information +

History +

Abstract

The method of determining total fluoride in brick-tea has been investigated, with oxygen bomb combustion-standard and fluoride ion additive selective electrode. The result showed that the sample of brick-tea was burned in the oxygen bomb with 3βMPa purity oxygen, then absorbing the ash with deionization water, the content of total fluoride was determined directly by means of fluoride ion additive selective electrode under pH5.6 and the concentration of sodium citrate dihydrate in TISAB is 110.0βg／L. The average recoveries were 95.88%~101.0% with RSD of 0.75%~1.25%. The fluoride in national tea reference material was determined, and the content of fluoride was accord with the certified values. This method is simple, rapid, accurate．

Key words

brick-tea / fluoride / fluoride ion selective electrode / oxygen bomb / standard addition method

Cite this article

EndNote

Ris (Procite)

Bibtex

Download Citations

WANG Xian-yang, LI Lu-ling. Determination of Total Fluoride in Brick Tea with Oxygen Bomb Combustion-Standard and Fluoride Ion Additive Selective Electrode Method[J]. Journal of Tea Science. 2006, 26(3): 204-208 https://doi.org/10.13305/j.cnki.jts.2006.03.010

References

[1] 张凌云, 陈瑞鸿, 曹顺爱, 等. 茶叶中氟的研究进展[J]. 茶叶, 2002, 28(1): 11~13.
[2] 马立锋, 石元值, 阮建云, 等. 我国茶叶氟含量状况研究[J]. 农业环境保护, 2002, 21(6): 537~539.
[3] 孙殿军, 刘立志. 我国饮茶型氟中毒研究的回顾及展望[J]. 中国地方病学杂志, 2005, 24(1): 1~2.
[4] 孙玉富, 孙殿军. 砖茶含氟量综述[J]. 中国地方病学杂志, 2002, 21(6): 515~518.
[5] 赵立达, 鲁成银. 茶叶中氟的检测方法[J]. 中国茶叶, 2003, 25(1): 17~18.
[6] 黄文耀, 李阳, 李明健, 等. 三种不同方法测定砖茶中氟含量的比较[J]. 中国地方病学杂志, 2002, 21(1): 61~62.
[7] 吴卫红, 谢正苗, 徐建明, 等. 土壤全氟含量测定方法的比较[J]. 浙江大学学报(农业与生命科学版), 2003, 29(1): 103~107.
[8] 刘孟刚, 史乃捷, 胡晓明, 等. 氧弹燃烧-ICP-OES用于柴油标准物质中硫含量的定值[J], 光谱学与光谱分析, 2003, 23(5): 965~967.
[9] 屈国新. 氧瓶燃烧-电极法测定毛发中微量氟的探讨[J]. 广西预防医学, 1997, 3(3): 165~167.
[10] J. M Colina, C F Arias, A Rodriguez.The influence of composition of the TISAB solution on the determination of fluoride in tea infusion[J]. Fluoride, 1990, 23(1): 20~23.
[11] 罗明标, 刘艳, 张国庆, 等. 茶汤中铝的浓度、形态和生物可给性[J]. 茶叶科学, 2004, 24(3): 153~158.
[12] 童小麟, 张杰砖. 茶中的氟对人体健康的影响[J]. 茶叶通讯, 2000, 27(2): 9~12.
[13] 杨惠芬, 李明元, 沈文. 食品卫生理化检验标准手册[M]第1版. 北京: 中国标准出版社, 1997: 158~60.