光度法测定污水中化学需氧量的改进  

Improvement of the Determination of Chemical Oxygen Demand (COD) in Wastewater by Using Spectrophotometry

作　　者：朱剑平[1,2] 蔡裕丰[1] 

机构地区：[1]启东市环境监测站,江苏启东226200 [2]同济大学,上海200092

出　　处：《污染防治技术》2013年第3期61-62,共2页Pollution Control Technology

摘　　要：对光度法测定悬浮物较高污水中的COD进行了改进,用经过改造的使出口管管径有较大增加的移液管移取经超声波作用后细化的污水样进行COD的测定。改进法精密度较好,RSD<1.61%,准确度也较高,加标回收率>94.0%,改进法与标准法的相对误差<2.32%满足监测方法的要求。The improvement of the determination of in wastewater samples with higher concentration of suspended substances by spectrophotometry,by increasing the pipette diameter to take water samplas after ultrasonic refining sewage to determine COD.The improved method is accurate,RSD 1.61%,higher accuracy,the recovery 94.0%,the relative error between the improved method and standard method 2.32%,that can meet the requirements of monitoring.

关 键 词：化学需氧量(COD) 光度法 标准法 改进 

分 类 号：X823[环境科学与工程—环境工程]