Uncertainty Assessment of Fipronil Residues in Frying by Gas Chromatography Tandem Mass Spectrometry
The uncertainty of fipronil pesticide residues in whitening was assessed according to the fifth method of four General Rules 2341 of Chinese Pharmacopoeia 2020 edition.By analyzing the component sources of uncertainty,calculate the uncertainty at the level of limit content specified in the Pharmacopoeia.The results showed that At the limit level of the pharmacopoeia,the expanded uncertainty of fipronil,fipronil sulfoxide,fipronil,and fipronil sulfone were 0.0035 mg/kg,0.0045 mg/kg,0.0040 mg/kg,and 0.0040 mg/kg,respectively.The main source of uncertainty in the determination of 32 pesticide residues is the preparation and fitting of standard curve.Therefore,in the process of preparing standard solution,the inspectors should choose the appropriate dilution method and measuring instruments,and correctly use a variety of measuring tools and measuring instruments.At the same time,various measuring tools and measuring instruments should be checked and calibrated regularly.
万方数据
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