重铬酸钾-紫外光度法测定废水中COD的探讨  

K_2Cr_2O_7 -UV Photometric Method Measuring COD in Water

作　　者：池吉安[1] 王宁[1] 

机构地区：[1]平顶山工学院化学化工系,河南平顶山467000

出　　处：《净水技术》2006年第1期69-71,共3页Water Purification Technology

摘　　要：化学需氧量(CODCr)是工业废水和环境水质检测中十分重要的项目之一,ISO和我国的标准方法均为K2Cr2O7回流滴定法,但该方法费时烦琐,水电用量大。本研究对紫外光度法快速测定CODCr进行了分析和实验研究,实验结果表明,该法具有消解时间短、准确度高、操作简单等特点,可同标准回流法等效使用。Chemical oxygen demand （CODcr） is a very important item in measuring industrial wastewater and environmental water quality. Titration after reflux-digestion is used in the method of ISO and the standard method of our country. But this method is too tedious and expansive. In this research, the method of measuring CODa by UV photometry was used instead of titration. The experimental result indicates that this method has advantages of time saving accuracy, precision and easy operation etc. and can be used equivalently to the standard method.

关 键 词：紫外光度法 标准回流法 CODCR 

分 类 号：X832[环境科学与工程—环境工程] X832.02