二甲酚橙分光光度法测定工作场所空气中锆不确定度评定  

Uncertainty evaluation of zirconium in the workplace air by xylenol orange spectrophotometry

作　　者：王君[1] 李钟玮[2] 刘永强[1] 

机构地区：[1]大庆市疾病预防控制中心微生物实验室,黑龙江大庆163312 [2]大庆市环境监测中心站

出　　处：《中国卫生工程学》2014年第3期239-241,244,共4页Chinese Journal of Public Health Engineering

摘　　要：目的建立工作场所空气锆及其化合物的测定不确定度数学模型,量化各不确定度分量,为职业卫生检测机构实验室质量体系管理提供资料。方法分析工作场所空气锆及其化合物的测定过程中各种不确定度的影响因素。其不确定度主要由标准溶液、标准曲线拟合、分光光度计、样品重复测定、吸收液体积和采集气体样品标准体积这六部分引入。结果本次工作场所空气锆及其化合物的测定结果为0.256±0.010 mg/m3,k=2(包含概率约为95%)。合成相对不确定度为2.1%,扩展不确定度为0.010 mg/m3。结论大气采样器流量计和分光光度计相对示值误差所引入不确定度为本测量最主要不确定度来源。Objective To establish the workplace air of the determination of zirconium and its compound uncertainty of mathematical model quantitative uncertainty components, provide occupational health examination organization laboratory quality system management information. Methods Various uncertainty factors were analyzed by determination of air zirco- nium and its compounds in the workplace. Its main source of uncertainty was introduced the standard solution, standard curve fitting, spectrophotometer, and repeat the sample standard, digestive fluid volume and gathering gas sample volume the six parts. Results Determination results of zirconium and its compounds in air workplace was （. 256 ± . 1） mg/ m^3 , k = 2 （including probability was about 95% ）. Synthesis of relative uncertainty was 2. 1%, the expanded uncertainty was . 1 mg/m3. Conclusion Atmospheric sampler flow meter and spectrophotometer are the main sources of uncertainty for the measurement.

关 键 词：不确定度 评定 环境空气 锆 测定 

分 类 号：R134[医药卫生—劳动卫生]