【摘要】 对NY/T 761-2004法测定果蔬类农产品中农药残留量的不确定度进行评定。通过建立数学模型,分析了测量过程的不确定度主要来源于提取溶剂量取体积不确定度、分取液体积不确定度、定容体积不确定度、标准溶液不确定度、峰面积不确定度。以甲胺磷的测量为例,对不确定度的各个分量进行计算,当甲胺磷检测浓度为1.091μg/g时,扩展不确定度为0.036μg/g。更多还原

【Abstract】 The uncertainty of measurement for determination of pesticide residues in vegetable and fruit by NY/T 761-2004 method was evaluated.Mathematic expression of pesticide resideues was established,and many possible sources of uncertainty of measurement were analyzed.The main sources of uncertainty of measurement were extraction agent,sample solution volume,volume,standard solution peak area.The components of uncertainty of measurement were calculated.Took the determination of methamidophos as example,when the concentration of methamidophos was 1.091 μg/g,the expanded uncertainty was(0.036) μg/g.更多还原