Uncertainty Assessment of the Content of Simetryn in Drinking Water by Ultra-High Performance Liquid Chromatography Tandem Mass Spectrometry
Based on the"Determination of 450 Pesticides and Related Chemicals Residues in Drinking Water by Liquid Chromatography Tandem Mass Spectrometry Method"(GB/T 23214-2008),this article introduces on how to determine the uncertainty evaluation of the content of Simetryn in drinking water by LC-MS/MS.By calculation of the synthetic uncertainty and standard uncertainty of the Simetryn drinking water sample with an average concentration of 5.14 µg/L,the uncertainty contribution mainly comes from the uncertainty introduced during the preparation process of the standard solution and the uncertainty introduced by the fitting of the standard curve,with contribution rates of 42％and 28％,respectively.The final result of the net content of Simetryn in drinking water is(5.14±0.5)μg/L,k=2.
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