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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
The electrochemical behavior of Sb-7 (1phenylazo) 8-hydroxyquinoline 5-sulfonate (BQ) system and its influencing factors were studied in 0. 2mol / L HAc NaAc medium at pH4.9. Sb BQ complex on the drop mercury electrode at -0.58 ~ -0.61V produced a good reduction of the wave, the first derivative of the peak (i’p) and the Sb concentration of 6.0 × 10-8 ~ The linear range was 1.0 × 10-6 mol / L with the detection limit of 4.5 × 10-8 mol / L. Determination of trace antimony in metallurgical samples by this method has achieved satisfactory results. The electrode reaction mechanism was discussed