钼(Ⅵ)-水杨基荧光酮络合物吸附波的研究与应用

Polarographic adsorption wave of molybdenum-salicyflorone complex and its application

在邻苯二甲酸氢钾 HCl 乙醇 水溶液中,钼(Ⅵ) 水杨基荧光酮体系在滴汞电极上,于-1.10V(vs.SCE)处有一良好的极谱波,其二阶导数峰电流与钼(Ⅵ)在8×10-10～6×10-8mol L范围内有良好的线性关系,检出限为5×10-10mol L。研究了极谱波的性质和电极反应机理。该方法已用于水及生物样品的测定。

In a buffer solution of potassium biphthalate-HCl, the complex of molybdenum-salicyflorone was adsorbed on the surface of dropping mercury electrode and produced a redution peak at -1.10 V(vs.SCE). Under optimum conditions, the linear range of the concentration of Mo(Ⅵ) with the secondary derivative oscillopolaro graphic peak current was 8×10^(-10)～6×10^(-8) mol/L with the detection limit of 5×10^(-10) mol/L. This method was applied to the determination of molybdenum in water and biological samples with satisfactory results. The mechanism of the electrode process was studied.