Objective To evaluate the uncertainty for the determination method of difenoconazole in grape by gas chromatography-mass spectrometry. Methods According to GB 23200.8?2016 National food safety standards-Determination of 500 pesticides and related chemicals residues in fruits and vegetables-Gas chromatography mass spectrometry, the model was established. And according to JJF 1059.1?2012 Evaluation and expression of uncertainty in measurement, the main factors influencing the accuracy of the experimental results were analyzed and quantified. Results The synthetic uncertainty in determination of difenoconazole in grape was 2.258% and the expanded uncertainty was 0.0451. The determination results were (0.06047±0.00273) mg/kg, k=2. Conclusion The results show that the preparation of standard solution and curve fitting has a great influence on the accuracy of the experimental results, and the repeatability determination has a smaller influence on the accuracy of the experimental results.
标题：气相色谱-质谱法测定葡萄中苯醚甲环唑的不确定度评定
英文标题：Uncertainty evaluation for the determination of difenoconazole in grape by gas chromatography-mass spectrometry
