竹笋中水胺硫磷农药残留量测定结果的不确定度分析

Analysis of Uncertainty in the Determination of Residual Levels of Hydrazine and Phosphorus Pesticides in Bamboo Shoots

对气相色谱法测定竹笋中水胺硫磷残留量测定结果进行不确定度分析。运用气相色谱法对竹笋中水胺硫磷残留量进行测定,通过建立数学模型,确立测量过程中不确定度的分量及来源,计算合成标准不确定度和扩展不确定度。不确定性的主要来源是水胺硫磷标准工作曲线、重复测量和标准溶液配置。当竹笋中水胺硫磷残留量为0.90 mg/kg时,扩展不确定度为0.059 mg/kg(k=2)。该模型适用于气相色谱法测定有机磷磷残留量的不确定度分析,提供科学可靠的依据。

Uncertainty analysis of the determination results of residual water aminothion in bamboo shoots using gas chromatography.Gas chromatography was used to determine the residual amount of hydrazine and phosphorus in bamboo shoots.By establishing a mathematical model,the components and sources of uncertainty in the measurement process were determined,and the synthetic standard uncertainty and extended uncertainty were calculated.The main sources of uncertainty were the standard working curve,repeated measurements,and standard solution configuration of aquathion.When the residual amount of hydrazine in bamboo shoots was 0.90 mg/kg,the expanded uncertainty was 0.059 mg/kg(k=2).This model was suitable for the uncertainty analysis of organic phosphorus residue determination by gas chromatography,providing a scientific and reliable basis.