原子吸收法测定水中铜含量及测量结果的不确定度分析

Determination of Copper in Water by Atomic Absorption Spectrophotometer and Uncertainty Analysis

目的:建立一种有效、可靠的方法测量饮用水中铜的含量是否超标。方法:采用火焰原子吸收法测定水样中铜的含量,并对测量结果进行不确定度分析。结果 :水样中铜的浓度为0.232μg/mL,测量结果的扩展不确定度为U=0.07μg/mL,k=2。结论 :用该方法测定水中铜的含量快速、准确,测量结果符合GB5749—2006《生活饮用水卫生标准》的规定。

[Objective] To establish an effective and reliable method to determine whether copper content in drinking water is excessive. [Method] Copper content in water was determined with flame atomic absorption method, and the uncertainty was analyzed, lResult] The concentration of copper in water samples was 0. 232μg/mL, and expanded uncertainty of measurement results was U =0. 07μ g/mL and k = 2. [Conclusion] This method was fast and accurate to determine copper content in water. Measurement results were in line with GB5749- 2006 Sanitary Standard for Drinking Water.