摘要
讨论了重铬酸盐法测定化学需氧量实验过程中不确定度的来源,评定了化学需氧量测定结果的不确定度。结果表明,测定结果的不确定度主要来源是方法的重复性和滴定空白与样品时消耗硫酸亚铁铵的体积之差产生的不确定度。
This paper discusses the sources of the uncertainty in measurement of chemical oxygen demand by bichromate determination method. The uncertainty for the concentration of chemical oxygen demand was evaluated. The uncertainty mainly comes from repeatability of resuits of measurements and the result that the volume of ammonium ferrous sulfate in the fitrations of the blank subtracts the sample.
出处
《茂名学院学报》
2009年第3期11-14,共4页
Journal of Maoming College
关键词
不确定度评定
化学需氧量
重铬酸盐法
evaluation of uncertainty
chemical cxygen demand
bichromate determination method
