Preparation and Uncertainty Assessment of Standard Work Solution of Hexachlorobenzene, Malathion and Sulfotep

• 作者: Luo Ming Peng Hui Wang Lu
• 来源期刊: Plant Diseases and Pests(植物病虫害研究：英文版)
• 学科: 工学
• 关键词: 标准工作液 工作溶液 马拉硫磷 制备工艺 不确定度评定 六氯苯 火焰离子化检测器 气相色谱仪
• 年，卷（期）: 2014,（6）
• 页码范围: 25-28
• 页数: 4页
• 分类号: TH16

摘要

[Objective] To prepare standard work solution of three pesticides used in the intermediate check of gas chromatograph and evaluate the uncertainty of solution. [Method] In view of intermediate check needs of gas chromatograph,common pesticides in pesticide residual test were taken as the study objects,i. e.,hexachlorobenzene,malathion and Sulfotep,state pesticide reference materials as the materials,volumetry was applied to prepare standard work solution of pesticides. Evenness and stability of the work solution was tested by using gas chromatographs installed with electron capture detector( ECD),flame photometric detector( FPD) and flame ionization detector( FID),respectively,and after the evaluation of concentration,uncertainty of the work solution was assessed from the perspectives of raw materials,preparation process,evenness and stability. [Result]Mass concentrations of the three standard work solution was 0. 1 mg / L,10. 0 mg /L,100. 0 mg / L,respectively,and relative expanded uncertainty 2. 640%,1. 980% and 2. 400%( k = 2). [Conclusion] The study offers technical support for the intermediate check of laboratory apparatuses.