水中碘化物的3种测定方法比较  

Comparison of Three Methods for Determination of Iodide in Water

作　　者：董志梅 黄叶薇 DONG Zhimei;HUANG Yewei(Beihai Water Supply Co.,Ltd.,Beihai 536000,China)

机构地区：[1]北海市供水有限责任公司,广西北海536000

出　　处：《食品安全导刊》2024年第6期72-75,共4页China Food Safety Magazine

摘　　要：目的:通过离子色谱法、硫酸铈催化分光光度法、电感耦合等离子体质谱法3种方法测定水中碘化物,通过实验比较,分析3种方法的优缺点。方法:选取质控样品作为实验对象,按照3种方法实验步骤测定各实验组水中碘化物浓度。结果:3种检测方法线性关系均满足实际检测要求,且相关系数R^(2)≥0.999。电感耦合等离子体质谱法检出限为0.6μg·L^(-1),加标回收率为100.8%,相对标准偏差为0.36%~0.45%;硫酸铈催化分光光度法检出限为1.2μg·L^(-1),加标回收率为84.4%,相对标准偏差为0.80%~1.91%;离子色谱法检出限为8μg·L^(-1),加标回收率为91.4%,相对标准偏差为0.23%~1.11%。结论:3种检测方法检测范围广、灵敏度高,且精密度和准确度表现良好,均可准确测定水中碘化物的含量。Objective:To determine iodine content in water by ion chromatography,cerium sulfate catalytic spectrophotometry and inductively coupled plasma mass spectrometry,and to analyze the advantages and disadvantages of the three methods through experimental comparison.Method:Quality control samples were selected as experimental objects,and the concentration of iodine in water of each experimental group was determined according to the experimental steps of the three methods.Result:The linear relationship of the three detection methods all meet the actual detection requirements,and the correlation coefficient R^(2)≥0.999.The detection limit of inductively coupled plasma mass spectrometry was 0.6μg·L^(-1),the spiked recovery rate was 100.8%,and RSD was 0.36%~0.45%.The detection limit of cerium sulfate catalytic spectrophotometry was 1.2μg·L^(-1),the spiked recovery rate was 84.4%,and RSD was 0.80%~1.91%.The detection limit of ion chromatography was 8μg·L^(-1),the spiked recovery rate was 91.4%,and RSD was 0.23%~1.11%.Conclusion:The three detection methods have a wide range of detection,high sensitivity,and good precision and accuracy,and can accurately determine the content of iodide in water.

关 键 词：碘化物 离子色谱法 硫酸铈催化分光光度法 电感耦合等离子体质谱法 

分 类 号：R123.1[医药卫生—环境卫生学]