Study on the Catalytic kinetic Spectrophotometry for Determination of Trace Silver

In this paper,a new catalytic kinetic spectrophotometric method for the determination of trace silver has been studied.It is based on the silver catalysed discoloring reaction of cerium(Ⅳ) reduced by chloride in hydrochloric acid medium.The linear range of silver is 0～40μg/L,the detection limit is 5 7×10 -7 g/L.The method is sensitive,simple and with good selectivity.It has been applied to the determinaiton of trace silver in water and waste water with satisfactory results.