高浓度氯离子水样COD_(Mn)的测定

Determination of COD_(Mn) in Water Sample Containing High Concentration of Cl^-

介绍了测定高浓度氯离子水样CODMn的一种新方法。本方法利用乙酸银去除氯离子的干扰 ,在一定的条件下 ,用高锰酸钾作为氧化剂和自身指示剂 ,用草酸钠还原过量的高锰酸钾 ,通过计算求出CODMn值 ,本方法适用范围更广。

A new method is introduced to determine COD Mn in the water sample containing high concentration of Cl -.The silver acetate is used to dislodge disturbance of Cl -.At some conditions,permanganic acid kalium is used as oxidant and self-tracer agent,sodium oxalate is used to reduce excessive permanganic acid kalium,and then the value of COD Mn is caculated.