ICP-OES测量纺织品重金属含量的不确定度评定

Evaluation of the uncertainty for measurement of heavy metals content in textile by Inductively Coupled Plasma Optical Emission Spectrometry

采用ICP-OES法测定纺织品中的可萃取重金属铬、铜、镍的残留量,并评定测量结果的不确定度。结果表明,铬、铜、镍的扩展不确定度(k=2)分别为0.052、0.10、0.070 mg/kg,工作曲线的拟合和测试重复性对测试结果的影响最大。

In this paper,the heavy metals of copper,nickel and chromium residue in textile were tested by ICP-OES,and the uncertainties of measurement results were evaluated.The results showed that the expanded uncertainties（k=2） of chromium,nickel and copper were 0.052 mg/kg,0.10 mg/kg and 0.070 mg/kg respectively.The uncertainties were most influenced by working curve-fitting and test repeatability.