密封法测定残酸水的COD_（cr）

DETERMINATION OF COD IN SPENT ACID WASTEWATER BY SEALING METHOD

对密封法测定残酸水的ＣＯＤ进行了研究。实验结果表明，这一方法经济，简便，准确度好，精密度高，能很好地消除Ｃｌ￣－的干扰。适用于测定残酸水的ＣＯＤ值。

the determination of COD in the spent acid wastewater by sealing method was researched in this paper。The experimental results showed that the nethod is economical,simple and accurate so that it can eliminate the inteference of CL-efficiently.Therefore,it can be used to determin the value of COD of spent acid wastewater。