摘要
例行监测中的ＣＯＤ测定，采用《水和废水监测分析方法》第三版中的重铬酸钾法［１］，测定准确可靠，但回流时间较长，耗水、耗电、分析速度慢，不能满足应急监测的需要。改用硫磷混合酸代替硫酸—硫酸银溶液进行回流操作可极大地缩短回流时间，提高分析速度，得到满意结果。
By using potassium dichromate method in the third edition of The Monitoring Analysis Method of Water and Waste Water,the determination of COD is accurate and reliable.However,the long time back-flow,large consumption of water and electricity,and low analysis speed are far from the needs of emergency monitoring.By replacing sulphoacid and silver sulfate solution by combining acid of sulphoacid and phosphoric acid in the back-flow process,the time is shortened and analysis is quicker.
出处
《云南环境科学》
1998年第1期61-63,共3页
Yunnan Environmental Science
