Abstract:

A methodology of uncertainty evaluation for the determination of carbendazim residues in rice by liquid
chromatography-tandem mass spectrometry (LC-MS-MS) was proposed. According to the Evaluation and Expression
of Uncertainty in Measurement (JJF 1059-1999), the mathematical model of uncertainty was established. The sources of
uncertainty were analyzed and each component of uncertainty was quantified individually and then combined. The results showed
that the curve fitting, preparation of standard solution and volumetric measurement were the main sources of uncertainty, and the
expanded uncertainty was 0.002 2 mg/kg (k = 2), and the residue of carbendazim in rice was 0.033 5 mg/kg.

Key words: liquid chromatography-tandem mass spectrometry, carbendazim, uncertainty, rice