【摘要】 本文报告了用双铂片电极交流示波极谱滴定法测定水中COD的方法。研究了终点时示波极谱图的一些影响因素。实验表明,Ag（Ⅰ）,Cd（Ⅱ）,CO（Ⅱ）,Ni（Ⅱ）,Zn（Ⅱ）,Mn（Ⅱ）,PO₄^3-,NO₃^-,Cl^-,Br^-,均不影响终点示波图形观察,本法也适合于在高浓度强酸中直接滴定。更多还原

【Abstract】 This paper describes determination of COD in water by A. C oscillographic polarographic titration on two identical Pt electrodes. The factors are discussed affecting oscillographic polarographic figure near end point. The experiment results show that Ag( Ⅰ ) , Hg( Ⅱ ) , Cw( Ⅱ ) , Co(Ⅱ) , Mn(Ⅱ) , Mi(Ⅱ) , Zn(Ⅱ) , Cd( Ⅱ ) , PO43- NO3- Cl- Br- I-do not that end pointobserved. This method may by used in the determination of COD in water with a large amount of strong acid.更多还原