【摘要】 在 0 .0 2mol/LHAc NaAc介质 (pH4.9)中 ,研究了Sb -7 (1 苯偶氮 ) 8 羟基喹啉 5 磺酸钠 (BQ)体系电化学行为及其影响因素。Sb BQ络合物在滴汞电极上于 -0 .5 8～ -0 .61V间产生一良好的还原波 ,其一阶导数峰峰值 (i′p)与Sb 浓度在 6.0× 10 - 8～ 1.0× 10 - 6 mol/L范围内呈线性关系 ,检出限为 4.5× 10 - 8mol/L。用该法测定冶金样品中痕量锑 ,取得了满意结果。对电极反应机理进行了探讨更多还原

【Abstract】 In a buffer solution of 0 02mol/L HAc NaAc(pH4 9),the complex of antimony*#-sodium 7 (1 benzeneazo) 8 hydroxyquinoline 5 sulfonate(BQ) was adsorbed on the surface of mercury electrode and produced a reduction peak at 0 58- 0 61V(vs. SCE) The detection limit and the linear range of the concentration of Sb*# to the first order derivative current(i p′) of single sweep oscillopolarography were 4 5×10 -8 mol/L and 6 0×10 -8 -1 0×10 -6 mol/L,respectively The method has been applied to the determination of trace antimony in pure tin,steel and lead powder with satisfactory results The mechanism of the electrode process has been also studied更多还原