镍、钴与Zincon的络合吸附波研究——铜精矿中微量镍、钴的同时测定

Investigation of Adsorptivt -Complex Waves of Nickel and Cobalt with Zincon ——Consecutive Determination of Trace Nickel and Cobalt in Copper Ore Concentrate

有关利用络合物的极谱催化波连续测定镍,钴的报道较少。在研究铜-Zincon的极谱行为时,我们发现NH_4Cl-Na_2SO_3(pH=6.5～7.5)底液中当Zincon浓度>4×10^(-5)·mol/L时,单扫描示波极谱仪上有两个峰,其峰电位分别为-0.42V和-0.56v(vs.

In the solution of 4 × 10-5mol/L Zincon-o.4mol/LNH4Cl-0.6% Na2SO3 two sensitive adsorptive-complex waves of Ni-Zincon and Co-Zincon were observed by single-sweep polarography. The peak potentials of the waves are -0.84V and -0.96V (vs. SCE), respectively. Various conditions of adsorptive-complex waves of Ni and Co in this system were studied; and the properties of these waves were investigated. The compositions of the complex of Ni and Co with Zincon also were determined to be 1:1.