不加热消解的COD快速测定方法及应用  

A Rapid Determination Method of COD Without Heating Digestion

作　　者：刘艳[1] 罗林林 

机构地区：[1]北京物资学院物流学院,北京101149 [2]北京尤思腾科技有限公司,北京100086

出　　处：《当代化工》2016年第10期2399-2401,2405,共4页Contemporary Chemical Industry

基　　金：北京市科技新星(XX2015B040)

摘　　要：针对国标中COD测定方法需要加热消解两小时的不简便性和量程上限仅仅到700 mg/L的受限制性,设计了一种不加热消解的COD快速测定法。利用浓硫酸代替加热消解,即在样品中加入浓硫酸回流至室温便可达到加热消解两小时的效果,并采用了6次多项式的计算方法,使得实验结果更加准确。实验表明,本方法可以在保证精度的情况下将测量量程扩大至1 000 mg/L,适用于更多化工领域的化学需氧量测定。In national standards, the determination of COD needs to digest the sample under high temperature for two hours, and determination concentration range is within only 700 mg/L. Here, a rapid determination method without the heating digestion was designed. Adding sulphuric acid into the sample to reflow to room temperature achieved the result of 2 h heating digestion. The experimental results show that the determination range can be expanded to 1 000 mg/L.

关 键 词：消解 化学需氧量(COD) 快速测定方法 

分 类 号：O657[理学—分析化学]