摘要
目的 建立一种快速、准确的高温燃烧水解 氟离子选择电极法测定煤、头发和食物中氟的方法。方法 对影响高温燃烧水解的因素如石英砂用量、水解时间、水解温度、蒸馏水体积以及称样量进行了比较系统的研究 ,并且确定了最佳试验条件。结果 本法高温燃烧水解时间比中华人民共和国标准GB T4 6 33 1997降低了 1 3,采用杨树叶、茶叶、煤标准参照物及辣椒、玉米等样品测定了方法的精密度和准确度 ,相对标准偏差 <5 % ,回收率 90 3%～ 10 7 6 %。结论 本方法适用于各种环境样品中氟的测定。
Objective To establish a fast and accurately method of determination of fluorine in coal, hair and food by combustion-hydrolysis-ion selective electrode method. Methods The influence factors on combustion-hydrolysis, such as silica weight, temperature and time of hydrolysis, sample weight and volume of distilled water were studied so that to determine the best of all testing conditions. Results The time for hydrolysis in this method was reduced by one third of that of GB/T4633-1997 standard of PRC method. The fluorine in standard reference material such as tea, poplar leaves, coal and capsicum, and corn was determined on precision and accuracy by this method. The relative standard deviation was less than 5%. The recovery varied from 90.3 % to 107.6%.Conclusion The method is suitable for determining fluorine in the various environmental samples.
出处
《卫生研究》
CAS
CSCD
北大核心
2004年第3期288-291,共4页
Journal of Hygiene Research
基金
国家十五攻关项目 (No.2 0 0 1BA70 4B0 3)
关键词
燃烧水解
氟离子选择电极法
测定
环境样品中氟
combustion-hydrolysis ion-selective electrode method, determination fluorine, the environmental samples
