湖北宜昌黑茶氟含量研究
Study on the Content of Fluoride in Hubei Yichang Dark Tea
李涛 1梁静宇 2张文雅 2韩蔓蔓 2王俊雄 2任道金2
作者信息
- 1. 三峡大学茶叶研究中心,湖北宜昌443002;三峡大学生物与制药学院,湖北宜昌443002
- 2. 三峡大学生物与制药学院,湖北宜昌443002
- 折叠
摘要
[目的]研究湖北宜昌黑茶氟含量,估算宜昌居民的氟离子摄入量.[方法]利用氟离子电极法,测定湖北宜昌自来水氟含量及供试5个批次宜昌黑茶的氟含量,分析冲泡过程中氟离子溶解特性.[结果]2014年1月6日湖北宜昌自来水的氟含量为(0.112±0.009)mg/L,为氟含量偏低的自来水.供试5个批次宜昌黑茶氟含量分别为(113±6)、(170±7)、(190±7)、(255±8)和(246±8)mg/kg,加标回收率在94.1％ ～104.6％,宜昌黑茶氟含量符合砖茶氟含量国家标准(300 mg/kg).5个批次宜昌黑茶洗茶2次后再冲泡,茶水中氟离子浓度在(0.107±0.008) ～ (0.939 ±0.031)mg/L,符合饮用水氟含量国标.[结论]湖北宜昌自来水氟含量偏低,供试5个批次的湖北宜昌黑茶氟含量符合国家标准,可以作为一种安全的氟来源.
Abstract
[Objective] The aim was to study fluoride content in black tea from Yichang,Hubei,to estimate residents' fluoride ion intake.[Method] The contents of fluoride of tap water in Yichang,Hubei Province and five batches of Yichang dark teas were determined by fluoride ion selective electrode.The dissolution features of fluoride in those infusing teas were studied.[Resuh] The content of fluoride of tap water in Yichang on Jan.6 in 2014,which is on the low side,was (0.112 ± 0.009) mg/L.The contents of fluoride of five batches of Hubei Yichang dark teas were (113 ±6),(170 ±7),(190 ±7),(255 ±8) and (246 ±8) mg/kg respectively.The recovery of standard were from 94.1 to 104.6％.The fluoride contents of five batches of those dark teas meet the national standards of the fluoride content in brick tea (300 mg/kg).The fluoride concentrations of those dark teas after cleaning twice,which are in the range from (0.107 ± 0.008) to (0.939 ± 0.031) mg/L,meet the national standards of the fluoride content in drinking water.[Conclusion] The content of fluoride of tap water in Yichang,Hubei Province,is on the low side.The contents of fluoride in these five batches of Yichang dark teas,which meet the national standards,are safe source of fluoride.
关键词
氟/氟离子选择电极/自来水/黑茶Key words
Fluoride/Fluoride ion selective electrode/Tap water/Dark tea引用本文复制引用
基金项目
三峡大学茶叶研究中心开放研究基金(2015CY1)
湖北宜昌市科技局项目(A14-302-a14)
出版年
2016
国家科技期刊平台
NSTL
维普
万方数据