内蒙古西部某市饮用水源中铀含量测定及其不确定度评定

Determination of Uranium Content and Evaluation of Uncertainty for Drinking Water Source of a city in western Inner Mongolia

本文根据铘境样品中微量铀的分析方法》(HJ 840-2017)中的液体激光荧光法,测定了内蒙古西部某市部分饮用水源中铀含量,其范围:(1.0075-7.2830) ng/mL;同时,针对水中铀分析方法的测定过程,通过建立数学模型,分析了不确定度的主要来源,量化了各不确定度分量,计算得出了水中铀的扩展不确定度,评定表明饮用水源中铀含量的结果表达式为(1.9711±0.0880) ng/mL,K=2,P=95%。

In this paper,the uranium content in part of drinking water sources in a city in western Inner Mongolia was determined by liquid laser fluorescence method in'methods for the analysis of trace uranium in environmental samples'(HJ 840-2017),its range:(1.0075-7.2830)ng/mL For the determination process of uranium analysis method in water,the main sources of uncertainty were analyzed through the establishment of mathematical model,the uncertainty components were quantified,and the expanded uncertainty of uranium in water was calculated in the meantime.The results of uranium content determination in drinking water was(1.9711±0.0880)ng/mL,K=2,P=95%.