摘要
本文使用离子选择电极法测定土壤样品中的氟化物。为提高测定结果的精确性,测定实验中需要使用总离子强度调节缓冲液。选取TISAB1和TISAB2两种常用缓冲液进行对比实验,结果表明TISAB1缓冲液的3次测定结果均在保证值规定范围内,可以更好地满足氟化物测定实验中提高测定精度的需要。金属离子干扰实验表明,在Al^(3+)浓度不超过10 mg/L、Fe^(3+)浓度不超过50 Mg/L、Ca^(2+)浓度不超过100 mg/L的情况下,3种金属离子不会对氟化物测定结果产生干扰。土壤水溶态氟化物的检出限为2.1μg,土壤全态氟化物的检出限为2.2μg,可以满足土壤环境氟化物测定要求。
The ion selective electrode method was used to determine fluoride in soil samples.In order to improve the accuracy of the measurement results,it is necessary to use the total ion strength adjustment buffer in the measurement experiment.TISAB1 and TISAB2 buffers were selected for comparison experiment.The results show that the three test results of TISAB1 buffer are within the specified range of guaranteed value,which can better meet the need of improving the accuracy of fluoride test.The metal ion interference experiment shows that when the concentration of Al^(3+)does not exceed 10 mg/L,the concentration of Fe^(3+)does not exceed 50 Mg/L,and the concentration of Ca^(2+)does not exceed 100 mg/L,the three metal ions will not interfere with the results of fluoride determination.The detection limits of water-soluble fluoride in soil and total fluoride in soil are 2.1μg and 2.2μg respectively,which can meet the requirements of soil environmental fluoride determination.
作者
徐伟
王桃源
高基景
赵剑
李殿春
秦超
Xu Wei;Wang Taoyuan;Gao Jijing;Zhao Jian;Li Dianchun(Harbin Comprehensive Investigation Center of Natural Resources,China Geological Survey,Harbin,China)
出处
《科学技术创新》
2024年第3期40-43,共4页
Scientific and Technological Innovation
