锑Ⅲ-邻苯三酚红-硫脲体系的极谱络合吸附波  

Polarographic Adsorptive Complex Wave of Antimony Ⅲ-Pyrogallol Red-Thiourea System

作　　者：黄美华[1] 李益恒[1] 余灿辉[1] 

机构地区：[1]湘潭大学化学学院,湘潭 411105

出　　处：《分析化学》2003年第1期41-43,共3页Chinese Journal of Analytical Chemistry

摘　　要：在 0 .0 8mol L磷酸溶液中 ,锑 邻苯三酚红络合物产生一灵敏的吸附波 ,加入硫脲对峰高有增敏作用。峰电位在 - 0 .30V(vs .SCE)左右 ,峰高与锑浓度在 4 .1× 10 - 1 0 ～ 2 .1× 10 - 6 mol L间呈线性关系 ;检出限为2× 10 - 1 0 mol L。并进行了机理研究。方法应用于铜合金中锑的直接测定 ,结果满意。In a medium of 0.08 mol/L phosphoric acid, a sensitive polarographic adsorptive complex wave of antimony pyrogallol red has been observed by using single sweep polarography. The prensence of thiourea can enhance the sensitivity. The peak potential appears at about -0.30 V( vs .SCE). The peak height is linearly proportional to the concentration of antimony over a range of 4.1×10 -10 ～2.1×10 -6 mol/L. The limit of detection is as low as 2×10 -10 mol/L. The mechanism of electrode reaction was also discussed. The method has been used to the determination of antimony in copper alloys with satisfactory results.

关 键 词：硫脲 锑 邻苯三酚红 极谱络合吸附波 铜合金 微量分析 极谱法 

分 类 号：O657.14[理学—分析化学]