过硫酸铵消化-砷铈催化分光光度法测定尿碘不确定度评定  

EVALUATION OF MEASUREMENT UNCERTAINTY FOR THE DETERMINATION OF IODINE IN URINE BY AS^(3+)-CE^(4+) CATALYTIC SPECTROPHOTOMETRY USING AMMONIUM PERSULPHATE DIGESTION

作　　者：谈桂权 

机构地区：[1]泰州市疾病预防控制中心,泰州225300

出　　处：《现代预防医学》2007年第8期1550-1552,共3页Modern Preventive Medicine

摘　　要：[目的]对过硫酸铵消化-砷铈催化分光光度法测定尿碘的不确定度进行评定。[方法]通过分析测定过程,识别不确定度来源,量化不确定度分量,计算合成不确定度和扩展不确定度。[结果]用本方法测定尿碘的扩展不确定度为0.035C。有必要在结果计算中应用校正因子。[结论]为提高测定结果的准确性,减小不确定度,建议在检测过程中采取一些技术改进措施。[Objective] To estimate the measurement uncertainty for the determination of iodine in urine by As3^＋-Ce4^＋ catalytic spectrophotometry using ammonium persulphate digestion. [Methods] Through the analysis of measurement procedure the uncertainty sources were identified. Each uncertainty component was evaluated and expressed as standard uncertainty. Then a combined standard uncertainty and an expanded standard uncertainty were caculated. [ Results] The expanded standard uncertainties for the determination of iodine in urine was 0.035C. It was necessary to use a correction factor in the resuh formula. [Conclusions] In order to get better accuracy and reduce the value of uncertainly, improved technical measures are suggested in the measurement procedure.

关 键 词：尿碘测定 过硫酸铵消化 分光光度法 不确定度 评定 

分 类 号：O657.3[理学—分析化学]