砷铈催化—分光光度法测定尿中碘含量的不确定度评定

Evaluation on the Uncertainty of Iodine in Urine Analyzed by As-Ce Catalytic Spectrophotometry

摘要: 目的评估砷铈催化—分光光度法测定尿中碘含量的测量不确定度，使实验结果更具客观性和准确性。方法根据《尿中碘的砷铈催化分光光度法》(WS/T107－2006)测定尿样结果，建立不确定度评定的数学模型，系统分析计算不确定度各分量。结果当尿中碘含量为85.25μg/L时，其扩展不确定度为3.0μg/L(k=2)。结论砷铈催化—分光光度法测定尿中碘含量的不确定度主要来源于标准溶液浓度的不确定度分量。

Abstract: Objectives To evaluate the uncertainty of iodine in urine analyzed by As-Ce catalytic spectrophotometry(WS/T107－2006) to make the results more objective and accurate. Methods A mathematic model was established by the results determined by the WS/T107－2006method,and each component of the uncertainty was analyzed and calculated by the model. Results The expanded uncertainty was3.0μg/L(k=2) while the iodine content was 85.25μg/L. Conclusion The uncertainty of the concentration of standard solution was the main source of the uncertainty component for iodine in urine analyzed by As-Ce catalytic spectrophotometry.