锑—4—2—噻唑偶氮—间苯二酚(TAR)配合体系电化学性质研究

A STUDY ON THE ELECTROCHEMICAL BEHAVIOUR OF sb(Ⅲ)—4(?)2—THIAXOLYLAZO(?) RESORCINOL (TAR) SYSTEM

在pH5.3的0.06 mol/L HAc/NaAc底液中,Sb(Ⅲ)—TAR配合物产生一灵敏吸附还原峰.可用于单扫描示波极谱法测定痕量锑.锑的浓度在2×10^(-8)～2×10^(-6)mol/L范围内,峰高与浓度呈良好的线性关系.该法应用于测定矿石中痕量锑,结果满意.Sb(Ⅲ)—TAR在汞电极上的电化学性质用多种电化学手段进行了初步研究.

In 0.06 mol/L HAc/NaAc (pH 5.3) buffer solution, a sensitive complex wave of Sb (Ⅲ)—TAR was observed by using linear sweep voltammetry. The peak height of the adsorptive complex wave is directly proportional to the concentration of Sb (Ⅲ)in the range 2×10^(-8)～2×10^(-6) mol/L. This method has been applied satisfactorily to the determination of trace Sb in ores. The electrochemical behaviour of the complex of Sb(Ⅲ)—TAR at mercury electrode was investigated using differental electrochemical techniques.