GC-MS/MS法测定茶叶中邻苯基苯酚残留量的不确定度评定  

Uncertainty Evaluation of O-phenylphenol in Tea by GC-MS-MS

作　　者：田莉 李静峰 张仁正 赵慧玲 李松 Tian Li;Li Jingfeng;Zhang Renzheng;Zhao Huiling;Li Song(Guizhou Institute for Food and Drug Control,Guiyang 550004,China)

机构地区：[1]贵州省食品检验检测所,贵州贵阳550004

出　　处：《广东化工》2018年第18期172-173,167,共3页Guangdong Chemical Industry

摘　　要：采用气相色谱-串联质谱法(GC-MS/MS)分析茶叶中邻苯基苯酚残留的不确定度。通过建立数学模型,分析不确定的来源,计算各个不确定度分量,将不确定度合成,得到该分析方法的测量不确定度评定方法。结果表明,由气相色谱-质谱仪引起的测量不确定所占权重最大,其次是内标溶液所引入的不确定度。样品称量引入的测量不确定度所占权重最小。通过分析发现,当邻苯基苯酚残留量为0.26 mg/kg时,该分析方法的测量扩展不确定度为0.02 mg/kg(k=2)。To establish a mathematical model of uncertainty evaluation of O-phenylphenol in tea by GC-MS-MS. and the method for the uncertainty measurement was evaluated. The mathematical model of measurement was set up. The different parts of uncertainty were analyzed. The combined standard uncertainty was calculated, and the evaluation of the uncertainty of this analytical method was observed. The results indicate that the uncertainty of GC-MS-MS is the largest factor contributed to the combined uncertainty. The next is caused by preparing internal standard solution, and the uncertainty of weighting sample is low. The analysis found that the content of o-phenylphenol is 0.26 mg/kg, the expanded uncertainty is 0.02 mg/kg （k=2）.

关 键 词：气相色谱-串联质谱法 邻苯基苯酚 不确定度 

分 类 号：O65[理学—分析化学]