化学需氧量(COD)国家标准和行业标准监测方法对比分析

Comparative Analysis on Monitoring Methods of National and Industry Standards for Chemical Oxygen Demand

对5种化学需氧量(COD)国家标准和行业标准监测方法对比分析,对比了不同标准的适用范围和检出范围,并对比了不同标准的方法的监测原理,得出分析人员应根据不同水样和氯离子浓度来选择合适的监测方法,但是对于地表水,当氯离子浓度大于1000 mg/L或者浓度更大时,除了对水样进行稀释以外,还缺乏合适的标准监测方法。

The monitoring methods of five national and industry standards for chemical oxygen demand are compared and analyzed.The application scope and detection scope of different standards are compared and the monitoring principles of different standard methods are compared.Analysts mainly select the appropriate monitoring methods according to the different chloride ion concentrations in different water samples.However,for surface water,when the chloride ion concentration is greater than 1000 mg/L or greater,there is no suitable monitoring method besides diluting the water samples.