电感耦合等离子体质谱法与硫酸铈催化法测定水碘的方法比较  

Comparison of the detection methods for water iodine by inductively coupled plasma mass spectrometer and cerium sulfate catalytic spectrophotometry

作　　者：王云[1] 张国平[1] 吴婷婷[1] 蒋忠瑭 

机构地区：[1]晋城市疾病预防控制中心,山西晋城048000

出　　处：《中国卫生检验杂志》2016年第17期2452-2453,2467,共3页Chinese Journal of Health Laboratory Technology

摘　　要：目的探讨电感耦合等离子体质谱法(ICP-MS)与硫酸铈催化法测定水碘的方法比较。方法用ICP-MS方法直接测定水中碘,以铟(^(115)In)作为内标元素电感耦合等离子体质谱法测定,标准曲线法定量;硫酸铈催化分光光度法测定水中碘化物含量,利用碘的质量浓度与相应吸光度的对数值的线性关系进行定量;同时用水中碘成分分析标准物质(GBW09113、GBW09114)作为质控样。结果经t检验,2种方法检测结果差异无统计学意义(P>0.05)。结论硫酸铈催化法测定时需要根据不同浓度的样品配制相应的测定曲线,线性范围窄,操作比较繁琐。用ICP-MS测定水中碘含量线性范围宽、抗干扰能力强、测定周期短,完全满足分析的要求,适用于日常样品的检测。Objective To discuss the comparison of the detection methods for water iodine by inductively coupled plasma mass spectrometer（ ICP-MS） and cerium sulfate catalytic spectrophotometry. Methods The water iodine was directly analyzed by ICP-MS with Indium（115In） as an internal standard. The quantification was based on standard curve; meanwhile,the water iodine was analyzed by cerium sulfate catalytic spectrophotometry. Using the quality of iodine concentration and absorbance corresponding to quantify numerical linear relationship. The standard reference materials（ GBW09113,GBW09114） were used as quality control standards. Results By t test,difference between the two methods showed no statistical significance（ P〉0. 05）.Conclusion The method of cerium sulfate catalytic spectrophotometry need to draw the corresponding measurement curve according to the samples with different concentrations with narrow linear range and complicated procedures. ICP-MS has wider linear range,stronger anti-interference ability and shorter time. It can fully meet the requirements of analysis for the determination of iodine in water.

关 键 词：电感耦合等离子体质谱法 硫酸铈催化法 水碘 

分 类 号：R123.1[医药卫生—环境卫生学]