【摘要】 在pH4.8的0.013mol/L的HAc-NaAc介质中,钥（Ⅵ）-7-（1-苯偶氮）-8-羟基喹啉-5-磺酸钠体系在滴汞电极上,于-0.46V（vs.SCE）电位处得到良好的吸附还原波,其二阶导数峰电流I_p与Mo（Ⅵ）在2.5×10^-8～4.5×10^-7mol/L浓度范围内呈良好的线性关系,检测限为1.25×10^-8mol/L Mo（Ⅵ）,方法用于钢样中微量钼的测定,结果较好.对电极机理进行了研究.更多还原

【Abstract】 Molybdenum-sodium-7-(1-benzeneazo)-8-hydroxyquinoline-5-sulfonate (BQ) complex pro- duces a reduction peak at-0.455 V( vs. SCE) on a dropping mercury electrode in 0.013 mol/L HAc-NaAc solution (pH = 4.8) . Under optimum conditions, the linear range of the concentration of Mo(Ⅵ)with the single-sweep second order derivative oscillopolarographic current was 2.5×10-8～4.5×10-7mol/L, the detection limit of Mo(VI) was 1.25×10-8 mol/L. This method has been applied to the determination of molybdenum in steel samples with satisfactory results. The mechanism of the electrode process has been studied.更多还原