ICP-MS检测烟草样品中镉的不确定度评定  

Uncertainty evaluation in determination of cadmium in tobacco using ICP-MS

作　　者：庞夙 陶晓秋 黄玫 韶济民 熊巍 

机构地区：[1]四川省烟草质量监督检测站,成都610041

出　　处：《分析仪器》2015年第5期73-76,共4页Analytical Instrumentation

摘　　要：采用电感耦合等离子体质谱法(ICP-MS)对烟草样品中的镉含量进行检测,对主要影响测量不确定度的样品称量、水分含量测定、待测液体积、消解液移取体积、测量的重复性、标准工作溶液、标准工作曲线等因素进行了分析,按照JJF 1059.1-2012《测量不确定度评定与表示》的规定进行了合成,并得到最终的扩展不确定度ω(Cd)=(0.6963±0.034)mg/kg。Cadmium in tobacco samples was measured by inductively coupled plasma mass spectrometry（ICP-MS）.The impacts of major source of measurement uncertainty were discussed.Uncertainty components such as sample weighing,moisture content,the liquid volume,the pipette volume of the digestion solution,measurement repeatability,the standard work-solution and the standard working curve were analyzed and synthesized according to JJF1059.1-2012 Evaluation and Expression of Uncertainty in Measurement,and the final expanded uncertainty wasω（Cd）=（0.6963±0.034）mg/kg.

关 键 词：ICP-MS 不确定度 镉 烟草 

分 类 号：O657.63[理学—分析化学] TS47[理学—化学]