空气中铅原子吸收分光光度法的不确定度评定  

Evaluation of Uncertainty for Determination of Lead in Air by Flame Atomic Absorption Spectrometry

作　　者：李倩 王朝杰 严敏 赵晓丽 LI Qian;WANG Chao-jie;YAN Min;ZHAO Xiao-li(Hangzhou Lin an Yingchuan Testing Technology Co.,Ltd.,Zhejiang Lin an 311300;Zhejiang Gongzheng Testing Center Co.,Ltd.,Zanyu Technology Group Co.,Ltd.,Zhejiang Lin an 311300,China)

机构地区：[1]杭州临安盈川检测科技有限公司,浙江临安311300 [2]浙江公正检验中心有限公司,赞宇科技集团股份有限公司,浙江临安311300

出　　处：《广州化工》2020年第2期101-103,共3页GuangZhou Chemical Industry

摘　　要：参照国家职业卫生标准探讨火焰原子吸收光度法测定工作场所空气中铅及其化合物测量结果的不确定度评定方法,建立数学模型并对各分量进行计算。标准溶液配制、样品消解定容体积、消解过程、平行样测定、采集样品引入的不确定度分别为0.52%、0.169%、0.183%、0.15%、2.90%;合成相对标准不确定度为3.0%,测定铅浓度为(0.0096±0.06)mg/m 3(k=2)。因此,测定工作场所空气中铅及其化合物不确定度的主要来源是采样仪器,应加强采样过程的质量控制。The national occupational health standards were used to build a mathematical model for the determination of lead and its compounds in the air of workplace and to calculate the components of uncertainty by using flame atomic absorption spectrometry.The uncertainty for the concentration of the standard solution,sample constant volume,sample digestion,parallel determination and sample collection was 0.52%,0.169%,0.183%,0.15%and 2.90%,respectively.The combined uncertainty was 3.0%.The concentration of lead in the test sample was 0.0096 mg/m 3,and the expanded uncertainty for the measurement was 0.060 mg/m 3(K=2).The dominant uncertainty for determination of lead and its compounds in the air of workplace came from sample collection.Quality control should be improved in the process of sample collection.

关 键 词：火焰原子吸收光谱法 工作场所 铅及其化合物 不确定度 

分 类 号：O657.31[理学—分析化学]