Evaluation of Uncertainty in the Determination of Lead Content in Drinking Water by Inductively Coupled Plasma Mass Spectrometry
The lead content in drinking water was determined by inductively coupled plasma mass spectrometry.According to the evaluation and representation of uncertainty,the main sources of measurement uncertainty in the experimental process were identified,and the various uncertainty components were quantified to obtain the synthetic uncertainty and extended uncertainty.The results showed that the lead content in drinking water was 5.73 μg·L-1,the confidence level was 95%,the inclusion factor k=2,and the extended uncertainty was 0.55 μg·L-1.The main sources of uncertainty in the experimental process were calibration curve fitting and standard solution preparation process.
inductively coupled plasma mass spectrometrydrinking waterarsenicuncertainty
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