微波消解-石墨炉原子吸收光谱法测定刺梨果汁中铅不确定度评定  

Uncertainty Evaluation for Determination of Lead in Rosa roxburghii tratt Juice by Graphite Furnace Atomic Absorption Spectrometry with Microwave Digestion

作　　者：冉茂乾 李志 陈露 徐孟怀 游元丁 焦彦朝 RAN Mao-qian;LI Zhi;CHEN Lu(Liupanshui Mountain-featured Ecological Product Research Center,Liupanshui,Guizhou 553000;State Key Inspection Laboratory of Fruit and Vegetable Products(Liupanshui),Liupanshui,Guizhou 553000)

机构地区：[1]六盘水市山地特色生态产品研究中心,贵州六盘水553000 [2]国家果蔬检测重点实验室(六盘水),贵州六盘水553000 [3]贵阳海关综合技术中心,贵州贵阳550081

出　　处：《安徽农业科学》2019年第21期198-200,218,共4页Journal of Anhui Agricultural Sciences

基　　金：海关总署科研计划项目(2018IK053)

摘　　要：[目的]对微波消解-石墨炉原子吸收光谱法测定刺梨果汁中铅含量的不确定度进行评定。[方法]考虑整个测定过程中的不确定度来源,对各因素影响结果进行系统分析,建立微波消解-石墨炉原子吸收光谱法测定刺梨果汁中铅的测量不确定度数学模型。[结果]标准溶液系列的配制、线性拟合求样品的浓度以及回收率是影响该方法不确定度的主要因素。采用该方法测定刺梨汁中铅含量的测定结果为(0.114±0.007)mg/L(k=2,P=95%)。[结论]该方法可用于微波消解-石墨炉原子吸收光谱法测定刺梨果汁中铅的不确定度评定。[Objective]The uncertainty of determination of Pb in Rosa roxburghii tratt juice by microwave digestion-graphite furnace atomic absorption spectrometry was evaluated.[Method]The sources of the measurement uncertainty were analyzed and the effects of some factors on the uncertianty were discussed.And then the mathematical model of uncertainty for determination of Pb in Rosa roxburghii tratt juice was established.[Result]The main sources of the measurement uncertainty were the preparation of standard solution,the recoveries and the method of linear fitting for sample concentration.The result of the determination of Pb in Rosa roxburghii tratt juice was(0.114±0.007)mg/L(k=2,P=95%).[Conclusion]This method is applicable to the uncertainty evaluation during determination of the content of Pb in Rosa roxburghii tratt juice by microwave digestion-graphite furnace atomic absorption spectrometry.

关 键 词：微波消解-石墨炉原子吸收法 刺梨汁 铅 不确定度 

分 类 号：TS[轻工技术与工程]