1．Institution Chemistry and Chemical Engineering，Central South University，Changsha 410083，China； 2．School of Information Science and Engineering，Central South University，Changsha 410083，China
Abstract： The direct and simultaneous determination of copper, cadmium and cobalt in zinc electrolyte by inductively coupled plasma atomic emission spectrometry (ICP-AES) was studied. Sample did not need pretreatment. The spectral lines with wavelengths of 327.393 nm, 226.502 nm and 228.616nm were selected as the analytical lines of copper, cadmium and cobalt respectively. The background interference and overlap interference were eliminated or reduced by selecting analysis line and adjusting background points. The effect of the matrix was overcome by matrix matching method. The contents of copper, cadmium and cobalt in smelter zinc electrolyte were determined by ICP-AES in 3% (V/V) HNO3 medium. The method was simple, rapid and reliable. The measured value of sample was consistent with the results of polarography, with the relative standard deviation of 0.7%-1.3%.The method can be used for the control analysis of the contents of impurity elements in zinc electrolyte.
Pilkington E S，Weeks C，Bond A M．Determination of trace elements in zinc plant electrolyte by differential pulse polarography and anodic stripping voltammetry[J]．Anal. Chem.，1976，48（12）：1665-1669.
[2]
Bond A M．200 Years of practical electroanalytical chemistry: Past, present and future Derections illustrated by reference to the on-line，on-stream and off-line determination of trace metals in zinc plant electrolyte by voltammetric and potentiometric techniques[J]．Anal. Chim. Acta，1999，400: 333-379.
[3]
徐采栋，林蓉，汪大成．冶金物理化学[M]．上海：上海科学技术出版社，1997.
[4]
Bobrowski A，Bond A M．Exploitation of the nitrite catalytic effect to enhance the sensitivity and selectivity of the adsorptive stripping voltammetric method for the determination of cobalt with dimethylglyoxime[J]．Electroanalysis，1992，4：975-979.
[5]
Bobrowski A，Bond A M．Catalytic adsorptive stripping voltammetric determination of cobalt as an α-benzil dioxime complex in the presence of an extremely large excess of zinc [J]．Electroanalysis，1991，3：157-162.
[6]
Bobrowski A．Catalytic adsorptive stripping voltammetric determination of cobalt and nickel as their α-furil dioxime complexe[J]．Elec-troanalysis，2004，16（18）：1536-1541.
[7]
Valera J A，Zlatev R, Stoytcheva M，et al．Deterrmination of trace concentrations of cobalt (Ⅱ) in electrolytic for electrowinning ofZn by differrential pulse voltammetry[C]．3 Rd Meeting of the Mexican Section ECS，2010：1085-1099.
