【摘要】 在pH＝4.1的0．03mol／L邻苯二甲酸氢钾介质中，Cd（Ⅱ）-向红菲啉络合物于悬汞电极上在-0．65V（vs．SCE）电位处产生一灵敏的吸附还原峰，利用1．5次微分技术进行测定，络合物波峰峰值epp与Cd（Ⅱ）浓度在1．0×10－9～1．0×10－7mol／L范围内呈良好的线性关系，检出下限为7×10－10mol／LCd（Ⅱ），本文详细研究了测定镉的最佳条件，对络合物在汞电极上的电化学行为进行了初步探讨。方法用于环境水样中微量镉的测定，结果令人满意。更多还原

【Abstract】 In 0. 03 mol/L potassium biphthalate buffer solution (pH=4. 1), a sensitive ad sorptive reduction wave of cadmium-bathophenanthroline (4,7-diphenyl-1, 10-phenanthroline) has been obtained using linear sweep voltammetry. The peak potential of the wave is about -0. 65 V(vs. SCE). The detection limit and linear range of determination are 7 × 10-10mol/L and 1×10-9～1×10-7mol/L Cd(Ⅱ) respectively, when the 1. 5th-order differentiation technique is used. The optimal conditions for the determination of cadmium have been dicsussed in detail. The electrochemical behaviour or adsorption complex on mer cury electrodes was explored. The method has been applied to the determination of cadmium in lake water and polluted water with satisfactory results.更多还原