Peroxydisulfate,as a commom co-reactant,have attracted considerable attention in recent years.The cathode electrochemiluminescence(ECL)intensity of pure peroxydisulfate is relatively weak,which limit its analytical application.In this paper,the ECL of silver ion/peroxydisulfate system and the analytical applications for determination of silver ion,parachlorophenol,glutathione were investigated.The main contents of this thesis are as follows:(1)The ECL of S_2O_8~(2-)was enhanced in the presence of Ag~+.A sen...