化学需氧量测量不确定度的评定

Assessment on Non-accuracy on Detecting Chemical Oxygen Demand

在强酸并加热条件下,用重铬酸钾为氧化剂,测定废水中的CODCr,通过对测量结果不确定度的评定,测定结果的扩展不确定度为3mg/L。

The non- accuracy on detecting COD using potassium dichromate as oxidizing agent under heating in strong acid solution is assessed. The expand non -accuracy is 3 mg/l.