摘要
废水中化学耗氧量的测定 ,国标用重铬酸钾法 ,该方法不仅酸介质用量大 ,而且需 2h加热。应用改进后方法 ,只需 2 0mim ,在少量酸介质的条件下 ,即可测定 ,既节约试剂又节约时间。
The comparison was made between two measuring method of COD for coking wastewater.the improved method had advantages of fewer quantity of acid,less heating time and low cost over the potassium dichromate method of national standard.
出处
《贵州化工》
2004年第3期21-22,共2页
Guizhou Chemical Industry
关键词
化学耗氧量
重铬酸钾法
改进
测定
Chemical oxygen consumption(COD),potassium dichromate method,improvement,determination