用石墨炉原子吸收法测定烟用香精中As、Pb的不确定度评定  

Evaluation of Uncertainty in Determination of Arsenic and Plumbum in Tobacco Flavor by Using Graphite Furnace Atomic Absorption Spectrometry

作　　者：刘秀彩 张鼎方 黄慧贞 李雪[2] 朱凤鹏[2] 刘泽春 黄华发 邓其馨 许寒春 

机构地区：[1]福建中烟工业公司技术中心,福建厦门361021 [2]国家烟草质量监督检验中心,河南郑州450001

出　　处：《江西农业学报》2015年第7期40-43,共4页Acta Agriculturae Jiangxi

摘　　要：为了评定用石墨炉原子吸收法测定烟用香精中As、Pb的不确定度,建立了其测量不确定度评定的数学模型和因果关系图,确定了其各测量不确定度的分量。结果表明:该测量不确定度的主要来源为样品的重复性和测定的样品浓度;As、Pb测量结果的标准不确定度分别为0.04、0.02 mg/kg;取包含因子k=2,在95%的置信水平下,As、Pb测量结果的扩展不确定度分别为0.08、0.04 mg/kg。In order to evaluate the uncertainty in the determination of arsenic （As） and plumbum （Pb） in tobacco flavor by u- sing graphite furnace atomic absorption spectrometry, we set up a new mathematical model and a cause-effect relationship diagram for the evaluation of the measurement uncertainty, and ascertained the components of various measurement uncertainties. The results showed that this measurement uncertainty mainly came from the repeatability and concentration of the tested samples. The standard uncertainty of As and Pb measurement results was 0.04 and 0.02 mg/kg, respectively. Under the conditions of k = 2 and ot = 0.05, the expanded uncertainty of As and Pb measurement results was 0.08 and 0.04 mg/kg, respectively.

关 键 词：石墨炉原子吸收法 烟用香精 不确定度 评定 As PB 

分 类 号：TQ657.4[化学工程—精细化工]