部分市售茶叶中氟含量的测定及分析  

Determination and analysis of fluoride content in certa in tea

作　　者：钟希琼[1] 傅小媚 邓泰濠 

机构地区：[1]佛山科学技术学院食品安全系,广东佛山528231

出　　处：《佛山科学技术学院学报（自然科学版）》2016年第2期39-42,共4页Journal of Foshan University(Natural Science Edition)

基　　金：佛山市科技创新专项资金(2014AG10007);佛山市科技计划项目(2014GA000425)

摘　　要：用氟离子选择电极法检测市售各类茶叶（绿茶、红茶、乌龙茶、普洱茶）中氟的含量。结果表明：四大类茶叶中普洱茶的氟含量相对较高，在180～240 mg·kg^-1之间；红茶的氟含量相对较低且相差不大，在80～105 mg·kg^-1之间；绿茶中的崂山绿茶氟含量相对较高，达274．16rag·kg^-1，其他3种绿茶的氟含量均较低，其中鼎湖山珠茶为54．64 mg·kg^-1；乌龙茶中4种茶叶的氟含量相差较大，其中潮安单枞茶王氟含量相对较低为48．58 mg·kg^-1，而安溪铁观音氟含量高达818．46 mg·kg^-1，超过行业标准的3倍多。方法的变异系数在1．19％-7．37％之间，说明重复性好，可以满足大批量样品的测定要求。The fluoride content in some kinds of tea was determined by fluorine selective electrode method. Theresults showed the fluorine content in Pu／＇ er tea was relatively higher, the average value was among 180-240mg·kg^-1. While the fluorine content in Black tea was lower, the average value was between 80 -105mg·kg^-1. Thefluoride content in Laoshan green tea was relatively higher, up to 274.16 mg ·kg^-1, the other three Green tea waslower, such as Dinghushan pearled tea was 54.64 mg·kg^-1. The fluorine content in Oolong tea had largerdifference, 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.

关 键 词：茶叶 氟含量 氟离子选择电极法 

分 类 号：S685[农业科学—观赏园艺]