火焰原子吸收法测定油漆涂层可溶出铅、镉、铬含量的不确定度评定

Evaluation of Uncertainty in the Determination of Soluble Lead, Cadmium, and Chromium Content in Paint Coatings by Flame Atomic Absorption Apectrometry

本文通过ASTM F963《消费者安全规范玩具安全溶解表面涂层的可溶性物质的方法》对油漆涂层可溶出铅镉铬含量进行测试,分析实验中引入的不确定度来源,分别为加入溶剂体积、试液浓度测定和样品称量过程引入的不确定度,其主要来源为试液浓度测定引入的不确定度。结果可为使用火焰原子吸收法测定油漆涂层可溶出铅、镉、铬含量的质量控制提供参考。

This article tests the soluble content of lead,cadmium,and chromium in paint coatings using ASTM F963 Consumer Safety Specification-Method for Dissolving Soluble Substances in Toy Safety Surface Coatings.The sources of uncertainty introduced in the experiment are analyzed,including the uncertainty introduced in the determination of solvent volume,test solution concentration,and sample weighing process.The main source of uncertainty is the uncertainty introduced in the determination of test solution concentration.The results can provide a reference for quality control of using flame atomic absorption method to determine the soluble lead,cadmium,and chromium content in paint coatings.