水质五日生化需氧量(BOD_5)测定不确定度的评定  

Evaluation of the Uncertainty for the Determination of the Biochemical Oxygen Demanded in Five Days Content of Water

作　　者：杨红 梁景波 

机构地区：[1]淄博市环境监测站,山东淄博255000

出　　处：《环境科学与管理》2006年第2期134-135,共2页Environmental Science and Management

摘　　要：水质五日生化需氧量测量的关键是用碘量法测水中溶解氧的含量,经过分析碘量法测定水中溶解氧含量测量不确定度的影响因素,认为测量的重复性的不确定度分量最大,其次是样品中溶液的体积,滴定溶液的体积和滴定溶液的浓度等不确定度分量。计算得到水中五日生化需氧量的测定结果的合成不确定度为6.4mg/L,扩展不确定度为12.8mg/L。The key of the measurement for the Biochemical Oxygen Demanded in five days（BOD5） of water is the determination of Dissolved Oxygen content of water by iodinimetric method. The influencing factors of the uncertainty of measurement in the determination of the Dissolved Oxygen content of water are discussed .The comPonents of the uncertainty of measurement are analyzed. The maximum component is the repeatability in turn, next component is the volume of sampling solution, the volume and the concentration of titrating. By calculation,the standard uncertainty and the expanded uncertainty of BODs are 6.4mg/L and 12.8mg/L.

关 键 词：五日生化需氧量 不确定度 评定 

分 类 号：X831[环境科学与工程—环境工程]