Determination of cadmium ion in ammonium chloride cadmium plating solution by cyclic voltammetry method
An electrochemical analytical method was developed for the rapid detection of Cd2+concen-tration in ammonium chloride-based cadmium plating solutions.A glassy carbon electrode was used as the working electrode within a three-electrode system,and the measurement was carried out by cyclic voltammetry.The impact of key experimental parameters,such as scanning potential range,pH and scan rate,on the measurement was investigated to optimize the procedure.Under optimal conditions,a linear relationship between the oxidation peak current(Ip)and CdCl2 concentration was established,with a standard curve equation of Ip=0.164x-2.238(R2=0.995).The results showed that the method demonstrated high precision with relative standard deviations(RSDs)below 1%and good accuracy with recoveries ranging from 98%to 110%as assessed by the standard addition method.Interference studies revealed that common coexisting ions such as Fe3+,Co2+and Cu2+had minimal effects on the determination of Cd2+.
cyclic voltammetrycadmium platingcadmium ion concentrationelectrochemical analysis
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