燃烧水解-离子选择电极法测定植物样品中氟含量的方法改进  

Determination of Fluoride in Plant Samples by Combustion Hydrolysis-Ion Selective Electrode Method

作　　者：赵怀颖[1] 孙德忠[1] 吕庆斌 

机构地区：[1]国家地质实验测试中心,北京100037 [2]北京市计量检测科学研究院,北京100029

出　　处：《岩矿测试》2010年第1期39-42,共4页Rock and Mineral Analysis

基　　金：国土资源地质大调查项目资助(1212010660902)

摘　　要：对燃烧水解-离子选择电极法测定氟离子含量的方法进行改进。采用标准溶液添加法绘制标准曲线，用去离子水吸收，操作简单，减少了误差，适用于低氟植物样品的测定。方法检测限为0．45Wg／g，回收率为90．2％～109．7％。将改进的电极法应用于低氟植物试样的检测，结果与离子色谱法测定值相符。Fluoride in plant samples were determined by improved combustion hydrolysis-ion selective electrode method. Deionized water was substituted of NaOH solution as absorption liquid and standard solution addition method was used for calibration, which obviously simplified the operation and reduced the determination errors. The detection limit of method for fluoride is 0.45 μg/g and the recovery is 90.2% - 109.7%. The improved method has been applied to the determination of trace fluoride in plant samples and the results are in agreement with those from ion chromatogranhv method.

关 键 词：燃烧水解 离子选择电极法 标准溶液添加 氟化物 植物样品 

分 类 号：O657.15[理学—分析化学] O613.41[理学—化学]