Objective To establish a mathematical model of uncertainty evaluation of benzoylurea pesticide residues in vegetables and vegetable products. Methods The evaluation process of benzoylurea pesticide residues in vegetables and invegetable products determined by high performance liquid chromatography-tandem mass spectromrtry (HPLC-MS/MS), mathematical model was applied to calculate the uncertainty component in the process, then the relative combined standard uncertainty and expanded uncertainty were calculated. Results When the content of diflubenzuron, chlorbenzuron and forchlorfenuron in vegetable and vegetable products were 10.4, 9.98 and 9.74 μg/kg, the extension relative uncertainty were 3.5%, 1.8% and 2.2% (k=2), respectively. The main sources of the uncertainty measurement were the accuracy of standard solution preparation, accuracy of method and the repeatability of measurement. Conclusion It provided a reference basis for uncertainty evaluation of benzoylurea pesticide residues in vegetables and vegetable products by HPLC-MS/MS.
标题：固相萃取高效液相色谱-串联质谱联用法测定蔬菜及其制品中苯甲酰脲类农药残留的不确定度评估
英文标题：Uncertainty evaluation of benzoylurea pesticide residues in vegetables and vegetable products determined by solid phase extraction-high performance liquid chromatography-tandem mass spectrometry
