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当前位置: 首页 > 文章 > 绿麦隆农药纯度标准物质的定值及不确定度评定 农药 2013,35 (9) 660-663
Position: Home > Articles > The Certification and Uncertainty Evaluation of Chlortoluron Reference Material Certified for Purity Agrochemicals 2013,35 (9) 660-663

绿麦隆农药纯度标准物质的定值及不确定度评定

作  者：
徐鹏;范洁;鲁炳闻;杨刚;张庆合;刘菲
单  位：
中国地质大学水资源与环境工程北京市重点实验室;环境保护部标准样品研究所;中国计量科学研究院
关键词：
绿麦隆;标准物质;纯度;气相色谱-飞行时间质谱法;质量平衡法;差式扫描量热法;不确定度评定
摘  要：
[目的]以市售绿麦隆农药为原料,经纯化和混匀后,研制绿麦隆农药纯度标准物质。[方法]采用气相色谱-飞行时间质谱法(GC-TOF-MS)对绿麦隆进行结构鉴定。采用质量平衡法(MB)和差式扫描量热法(DSC)对绿麦隆进行纯度定值,并分别评价2种定值方法的不确定度。[结果]研制的绿麦隆农药纯度标准物质均匀性良好,稳定时间至少20个月,纯度保证值为99.7%,扩展不确定度为0.3%(k=2)。[结论]为环境中绿麦隆的分析检测提供量值溯源保证。
译  名：
The Certification and Uncertainty Evaluation of Chlortoluron Reference Material Certified for Purity
作  者：
XU Peng;FAN Jie;LU Bing-wen;YANG Gang;ZHANG Qing-he;LIU Fei;Beijing Key Laboratory of Water Resources and Environmental Engineering, China University of Geosciences(Beijing);Institute for Environmental Reference Materials Ministry of Environmental Protection;National Institute of Metrology;
关键词：
chlortoluron;;certified reference material;;purity;;GC-TOF-MS;;mass balance method;;differential scanning calorimetry;;uncertainty evaluation
摘  要：
[Aims] Chlortoluron was prepared and certified as pure reference material by repeated recrystallization and mixing. [Methods] The structure of the material was qualitatively identified by GC-TOF-MS. The purity of chlortoluron was determined by mass balance method and differential scanning calorimetry. The uncertainty of two methods were respectively evaluated. [Results] Chlortoluron had better homogeneity and its stability could maintain at least 20 months,the purity value of chlortoluron was 99.7%, the expanded uncertainly was 0.3%(k=2). [Conclusions] Provide traceability assurance for the detection and analysis of chlortoluron in environment.

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