络合吸附波测定微量锑Ⅲ  

Oscillopolarographic Wave of Antimony-7-(1-Benzeneazo)-8- hydroxyquinoline-5-sulfonate Complex

作　　者：周长利[1] 罗川南[1] 卢燕[1] 李慧芝[1] 于海芹[1] 

机构地区：[1]济南大学应用化学系,济南250022

出　　处：《分析化学》2002年第3期331-333,共3页Chinese Journal of Analytical Chemistry

摘　　要：在 0 .0 2mol/LHAc NaAc(pH 4 .9)介质中 ,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 .6 1V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 8.0× 10 -7～ 1.0× 10 -5mol/L范围内呈线性关系 ,检出限为 4 .5× 10 -7mol/L。用该法测定冶金样品中痕量Sb ,取得了满意结果。In a buffer solution of 0.02 mol/L HAc-NaAc(pH 4.9),the complex of antimony(III)-7-(1-benzeneazo)-8-hydroxyquinoline-5-sulyonate (BQ) was adsorbed on the surface of mercury electrode and produced a reduction peak at -0.58similar to -0.61 V ( vs. SCE). The detection limit and the linear range of the concentration of Sb(III) to the first order derivative-single sweep oscillopolarograpbic peak current(I-p(')) were 4.5 x 10(-7) mol/L and 8.0 x 10(-7) similar to 1.0 x 10(-5) mol/L Sb(III), respectively. The method has been applied to the determination of micro amounts of Sb in steel with satisfactory results. The mechanism of the eletrode process has also been discussed.

关 键 词：络合吸附波 7-(1-苯偶氮)-8-羟基喹啉-5-磺酸钠 锑 示波极谱法 微量分析 冶金样品 测定 

分 类 号：O657.1[理学—分析化学]