溶液标准物质及滤光片检定/校准分光光度法化学需氧量测定仪的优缺点对比

Comparison of the Merits and Demerits of Spectrophotometric COD meter for Standard Solution and Filters at Verification/Calibration

现行化学需氧量测定仪A类仪器的检定方法存在诸多问题:检定时间较长,检定成本较高,现场检定时溶液标准物质不便于携带,检定废液对环境产生污染等。相较于溶液标准物质使用滤光片检定/校准A类化学需氧量测定仪能克服以上溶液标准物质带来的问题。本文通过对比阐述了两种方法的优缺点。

There are many problems in the verification method of class A Chemical Oxygen Demand meter:the verification time is long,the verification cost is high,the standard substance of the solution is not convenient to carry in the on-site verification,and the waste liquid may cause pollution to the environment.Compared with the solution standard substance,the filter verification/calibration of class A Chemical Oxygen Demand meter can overcome the problems caused by the solution standard substance.In this paper,the advantages and disadvantages of the two methods are compared.