还原-偶氮光度法测定废水中硝基苯的不确定度评估  

Evaluating Uncertainty of Determining Nitrobenzene in Wastewater by Reduction Azo-photometry

作　　者：许伟[1] 周俊[1] 周晓惠[1] 臧雯雯[1] 胡佩[2] 

机构地区：[1]江苏省东台市环境监测站,江苏东台224200 [2]四川师范大学化学与材料学院,成都610066

出　　处：《四川环境》2011年第1期45-47,共3页Sichuan Environment

摘　　要：以还原-偶氮光度法测定了废水中硝基苯的浓度,分析了测量过程中4个主要部分的不确定度。样品中硝基苯的浓度为0.500μg/mL,取包含因子k=2(95%置信概率),扩展不确定度为U=0.032μg/mL,结果可表示为:(0.500±0.032)μg/mL。此方法测定硝基苯的不确定度的评析,有利于更准确地表示测量结果。Nitrobenzene concentration in wastewater was determined by reduction azo-photometry and the uncertainties of four primary parts of the determination process were analyzed.When the concentration of nitrobenzene was 0.500μg/mL and let the coverage factor k=2（confidence probability was 95%）,the extended uncertainty U=0.032μg/mL.The result could be shown as Cnitrobenzene =（0.500±0.032）μg/mL.The uncertainty determined in this way could be more accurately.

关 键 词：不确定度 硝基苯 还原-偶氮光度法 

分 类 号：X832[环境科学与工程—环境工程]