基于GUM法和控制图法评定绿茶中三唑磷残留量测定的不确定度  

Uncertainty Evaluation of Triazophos Residues in Green Tea Based on GUM Method and Control Chart Method

作　　者：连增维 龚小丽 陈月红 胡彧娴[1] 倪建成 胡银凤 LIAN Zengwei;GONG Xiaoli;CHEN Yuehong;HU Yuxian;NI Jiancheng;HU Yinfeng(Zhangzhou Agricultural Test and Inspection Center,Zhangzhou 363000,China;Jike Testing Technology Co.,Ltd.(Fujian),Zhangzhou 363005,China;School of Life Sciences,Ningde Normal University,Ningde 352100,China)

机构地区：[1]漳州市农业检验监测中心,福建漳州363000 [2]吉克检测技术(福建)有限公司,福建漳州363005 [3]宁德师范学院生命科学学院,福建宁德352100

出　　处：《食品工业科技》2023年第4期308-316,共9页Science and Technology of Food Industry

摘　　要：采用气相色谱-串联质谱法(GC-MS/MS)测定绿茶中三唑磷的残留量并进行不确定度评定。依据ISO/IEC Guide 98-3:2008(GUM法)和GB/T 27411-2012《检测实验室中常用不确定度评定方法与表示》(控制图法)对检测结果进行不确定度的分析与量化。结果表明,GUM法和控制图法的评定结果分别为(0.112±0.012)mg/kg,k=2和(0.108±0.018)mg/kg,k=2。GUM法的不确定度主要来源是质量浓度和仪器稳定性,其各自占总不确定度的38.9%和24.7%。控制图法只对检测结果进行统计分析,简单易操作,考察的是检测结果的长期趋势,可在日常检测工作中的内部质量控制应用中得到实施,而GUM法适用于复检样品或客户对不确定度有要求时的评定,计算复杂,但可在短时间内获得不确定度评定结果。The amount of residual triazophos in green tea was determined by gas chromatography tandem mass spectrometry(GC-MS/MS)and then the uncertainty was evaluated.According to ISO/IEC Guide 98-3:2008(GUM method)and GB/T 27411-2012"Common uncertainty assessment methods and representations in testing laboratories"(control chart method),the uncertainty of the measurement results was analyzed and quantified.Results showed that,the evaluation results of the GUM method and the control chart method were(0.112±0.012)mg/kg,k=2 and(0.108±0.018)mg/kg,k=2,respectively.The main sources of uncertainty of the GUM method were mass concentration and instrument stability,which accounted for 38.9%and 24.7%of the total uncertainty respectively.The control chart method only performed statistical analysis of the test results,which was simple and easy to operate.It inspected the long-term trend of the test results and could be implemented in the application of internal quality control in daily testing work.The GUM method was suitable for re-examination of samples or the evaluation of uncertainty requirements by customers.The calculation was complex,but the uncertainty evaluation results could be obtained in the short term.

关 键 词：不确定度 三唑磷 绿茶 GUM法 控制图法 

分 类 号：O657.7[理学—分析化学]