原子荧光光谱法测定化妆品中汞的不确定度评定  

Evaluation on Uncertainty in Determining Concentration of Mercury in Cosmetics by Atomic Fluorescence Spectrometry

作　　者：魏文霞 王广喜 王晓玉[2] 胡俊庆[2] 

机构地区：[1]黑龙江省林甸县环境保护局环境监测站,黑龙江林甸166300 [2]大庆市环境监测中心站,黑龙江大庆163316

出　　处：《环境科学与管理》2013年第4期135-138,共4页Environmental Science and Management

摘　　要：根据JJF 1059-1999,建立了原子荧光光谱法测定化妆品中汞不确定度数学模型,分析了测试过程中不确定度的来源,并对各不确定度分量进行量化,本次测定的合成相对不确定度为0.045;其中由消化液浓度引起相对不确定度为0.044 8,样品消化定容体积引入不确定度0.000 58,称量样品质量引入的不确定度0.000 59。最大的不确定度分量是样品消化重复测定,其相对不确定度分量值为0.043,其次为标准曲线拟合的相对不确定度,分量值为0.006 4,本次测定结果为0.513±0.046 mg/kg;k=2(置信水平95%)Based on JJF1059 - 1999, this study established a mathematical model to determine the uncertainty sources in defining mercury in cosmetics with atomic fluorescence spectrometry, and to quantify the various uncertainty components. The relative synthesis uncertainty is 0. 045, with uncertainty caused by digestive juices concentration of 0. 044 8, digestion constant volume of the sample 0. 000 58, weigh of the sample 0. 000 59. Resetting of sample digestion topped the uncertainty list with 0. 043, followed by standard curve fitting of 0. 006 4. The measurement result is 0. 513 ± 0. 046 mg/kg and k = 2 （ confidence level of 95% ）.

关 键 词：不确定度 评定 化妆品 汞 原子荧光光谱法 

分 类 号：X820.3[环境科学与工程—环境工程]