摘要
目的建立硫酸铈催化分光光度法测水中碘化物含量的不确定度数学模式,探讨检测过程中的质量控制因素。方法按照适合缺碘及高碘地区的水碘检测方法(中国疾病控制预防中心国家碘缺乏病参照实验室推荐),应用一个实例量化不确定度的分量,并作详尽的分析和计算,得到扩展不确定度。结果标准系列的逐级稀释、标准曲线的拟合对不确定度的贡献较大。该水样碘化物含量报告为(3.92±0.19)μg/L,P=95%,k=2。结论硫酸铈催化分光光度法测水中碘化物含量的检测过程中严格控制标准曲线的线性范围、逐级稀释、同步实验等步骤,为实验室质量控制提供依据。
[ Objective ] To establish a mathematical model for uncertainty evaluation in determining iodide content in water by ceri- um sulfate catalytic speetrophotometry, and discuss the quality control factors in detection process. [ Methods ] According to water i- odine detection method in iodine deficiency and excess areas recommended by National Iodine Deficiency Disorders Reference Labo- ratory of China Center for Disease Control and Prevention, the quantized uncertainty component of an example was utilized for de- tailed analysis and calculation, and resulted in expanded uncertainty. [ Results ] Progressive dilution of the standard series and standard curve fitting had great contribution to the uncertainty. The iodide content of water samples was reported as （ 3.92 ± 0.19 ） μg/L, P = 95 %, k = 2. [ Conclusion ] The experimental procedures such as the linear range, progressive dilution and synchroniza- tion should be strictly controlled in the determination of iodide content in water by cerium sulfate catalytic speetrophotometry.
出处
《职业与健康》
CAS
2012年第18期2253-2256,共4页
Occupation and Health
关键词
不确定度
碘
生活饮用水
Uncertainty
Iodine
Drinking water
