摘要
目的了解砖茶中氟含量过高的原因及其预防措施,保护饮茶人群的身体健康。方法选择燃煤污染型地氟病多发区(简称“高氟区”)和无地氟病地区(简称“低氟区”)的茶园(场)作为采样点。在茶园(场)的5个方位设置采样点,采集各采样点内同种茶树上的老叶和嫩叶。按照GB/T5009.18—2003《食品中的氟测定》的要求,采用氟离子选择电极法对样品进行测定。结果共采集茶叶样本433件,均检出氟。高、低氟区老叶中的含氟量[分别为(1106±684)、(989±618)mg/kg]均高于嫩叶[分别为(86±55)、(78±76)mg/kg],经t检验,差异均有统计学意义(P<0.01)。高氟区老叶、嫩叶中的含氟量[分别为(1106±684)、(86±55)mg/kg]与低氟区[分别为(989±618)、(78±76)mg/kg]比较,经t检验,差异均无统计学意义(P>0.05)。结论茶叶含氟量随着茶叶生长时间的延长而升高。厂家应选用氟含量较低的嫩叶作为制茶原料,群众应少饮或不饮老茶。
Objective To explore the factors that cause fluoride level in the brick-tea produced in Ya an region and look for the method for reducing tea fluoride.Methods Compared the fluoride content in the old leaves and new leaves from different fluoride level regions.Results The tea content in the old leaves was higher than that in the new leaves,there was no difference among the different plant areas.Conclusion The content of fluoride in tea increases as the growth time goes on.
出处
《环境与健康杂志》
CAS
CSCD
北大核心
2007年第4期249-250,共2页
Journal of Environment and Health
关键词
氟
茶
卫生调查
Fluorine
Tea
Health survey
