浅析重铬酸钾法测定化学需氧量的不确定度  

Exploration of Uncertainty in Measurement for Chemical Oxygen Demand

作　　者：黄翠红 Huang Cuihong(Guangdong Spectrum Testing Technology limited company,Foshan 528000,China)

机构地区：[1]广东波谱检测科技有限公司,广东佛山528000

出　　处：《山东化工》2022年第22期148-150,共3页Shandong Chemical Industry

摘　　要：化学需氧量的定义是在强酸条件的情况下,水中的有机物质被重铬酸钾氧化消耗氧的量,也可大致的表示为水中有机物质的量,化学需氧量是评估水体的被污染程度的一个指标,同时也是对水体的质量总量控制和监控重要指标之一。化学需氧量作水体评估的指标,保证化学需氧量测量结果的准确性尤为重要。在很大程度上,不确定度的多少决定了测结果的有效性,因此探讨化学需氧量测定的不确定度是极其有必要的。Chemical oxygen demand(CODCr)expressed the content of oxygen required when the organic matter in sewage is oxidized by potassium dichromate under strong acidic conditions.At the same timg,It can roughly indicate the amount of organic matter in sewage.It is one of the important indicators to evaluate the pollution degree of water body,and it is one of the indicators to control the total water quality.As an important evaluation index,it is particularly important to ensure the accuracy of the measurement results.Therefore,it is particularly important to explore the uncertainty of chemical oxygen demand determination.

关 键 词：化学需氧量 重铬酸钾法 不确定度 

分 类 号：X832[环境科学与工程—环境工程]