摘要
依据NY/T761—2008标准第二部分,采用气相色谱法对黄瓜中乙烯菌核利残留进行测定,分析检测过程中的各不确定度分量来源,建立了不确定度评定的数学模型,进而对各不确定分量进行合成与扩展。结果表明:黄瓜中乙烯菌核利残留测量结果的合成相对标准不确定度和扩展不确定度分别为2.78%和5.56%(k=2),其中标准溶液的稀释与定容过程、乙烯菌核利残留的提取和净化过程所产生的回收率差异、色谱峰面积测量导致的误差是测量不确定度的主要来源。本研究结果可为客观评价蔬菜中农药残留检测结果提供参考。
According to the second part of NY/T761—2008, the vinclozolin residue in cucumber was determined by GC. The sources of uncertainty components coming from the measuring process was analyzed. The mathematical model for the evaluation of measurement uncertainty was built and the uncertainty components were synthesized and expanded. The results showed that the relative combined standard uncertainty and expanded uncertainty of measurement results were 2.78% and 5.56%（k=2）,respectively. The sources of measurement uncertainty mainly derived from diffusion and constant volume process of standard solution, the recovery rate in the extraction and purification process, and the error caused by the measurement of chromatographic peak area. The results of this study provide a reference for objective evaluation of the pesticide residue detemanation results.
出处
《农药学学报》
CAS
CSCD
北大核心
2017年第4期500-506,共7页
Chinese Journal of Pesticide Science
基金
新疆维吾尔自治区科技计划项目(201517105)
关键词
黄瓜
乙烯菌核利
残留
不确定度
评定
Cucumis sativus L.
vinclozolin
residue
measurement uncertainty
evaluation
作者简介
罗彦平，男，工程师，研究方向为色谱检测，E-mail：1102033296@qq．com
单江华，通信作者，男，农艺师，研究方向为农产品质量安全检测，E-mail：276670560@qq．com
