石墨炉测定尿铅的不确定度合成及分析

Synthesis and analysis of uncertainty of lead's density in urine detected by graphite furnace-AAS

合成尿铅测定结果的不确定度及分析影响不确定度的因素。结果:(1)尿样中铅含量C=(118.8±8.2)ng.mL-1;(2)最主要影响因素为标准工作曲线,其对不确定度的贡献达80.5%。结论:标准工作曲线对不确定度的贡献随着尿铅浓度的增大而减少。

The uncertainty of lead in urine was determined and influence factors were analyzed.The results：（1）The content of lead in urine C=（118.8±8.2）ng·mL-1;（2）The key influence factor was standard work curve,reached 80.5%.Conclusion： The effect of standard work curve reduced with lead in urine increased.