摘要
本法用硝酸-双氧水消解烘干后的白菜,以柠檬酸钠溶液作离子强度缓冲调节剂并采用氟离子选择电极在pH5～6时直接测定游离态氟离子浓度.方法标准偏差≤0.16,变异系数〈5.44%,平均回收率为102.62%.
In this work,the cabbage was digested by nitric acid-hydrogen peroxide firstly. Then, sodium citrate solution was used as the buffer to regulate the ionic strength. Finally, free fluoride ion concentration was determined by fluorine ion selective electrode at pH 5-6. Standard deviation was 0.16, coefficient of variation was 5.44%, and average recovery was 102.62%.
出处
《河南科学》
2013年第4期438-440,共3页
Henan Science
关键词
氟化物
白菜
氟离子选择电极
硝酸-双氧水消解
fluoride
cabbage
fluorine ion selective electrode
nitric acid-hydrogen peroxide digestion
作者简介
吴红（1972-），女，河南郑州人，工程师，主要从事环境监测分析工作．
