离子色谱法快速测定氯化钾中微量溴离子和硫酸根离子  

Determination of Trace Br^(-) and SO_(4)^(2−) in Potassium Chloride by Ion Chromatography

作　　者：金珍 闫春辉 JIN Zhen;YAN Chun-hui(Analysis and Test Center,Soochow University,Suzhou 215123,Jiangsu China)

机构地区：[1]苏州大学分析测试中心,江苏苏州215123

出　　处：《分析测试技术与仪器》2022年第3期304-307,共4页Analysis and Testing Technology and Instruments

摘　　要：建立了离子色谱-抑制型电导快速检测氯化钾中微量溴离子和硫酸根离子的方法.在优化的色谱条件下,Br^(-)和SO_(4)^(2−)分别在0.05~10 mg/L质量浓度范围内线性关系良好(相关系数r分别为0.9951、0.9962),方法检出限分别为0.029、0.020 mg/L.氯化钾中Br^(-)和SO_(4)^(2−)的加标回收率在93.7%~99.0%范围内.方法具有线性范围好、易于操作、灵敏度高等特点,可作为氯化钾中快速检测Br^(-)和SO_(4)^(2−)的质量控制方法.A method for rapid detection of trace bromide and sulfate ions in potassium chloride by ion chromatography with suppressed conductivity has been established.The calibration curves of Br^(-)and SO_(4)^(2−)showed good linearity in the range of 0.05~10 mg/L(r was 0.9951,0.9962,respectively).The detection limits of Br^(-)and SO_(4)^(2−)were 0.029 mg/L and 0.020 mg/L,respectively.The recoveries of Br^(-)and SO_(4)^(2−)in potassium chloride ranged from 93.7%to 99.0%.The method is of a good linear range,easy operation and high sensitivity,can be used as the quality control method for the rapid detection of Br^(-)and SO_(4)^(2−)in potassium chloride.

关 键 词：离子色谱法 氯化钾 Br^(−) SO_(4)^(2−) 

分 类 号：O657.7[理学—分析化学]