锑(Ⅲ)—5-Br-PADAP配合物电化学行为的研究和分析应用  

Investigation on the Electrochemical Behaviour of Sb(Ⅲ)-5-Br-PADAP Complex and Its Application

作　　者：戎斌[1] 朱腾[1] 赛吉拉乎 张静[1] 

机构地区：[1]北京科技大学化学系

出　　处：《冶金分析》1993年第5期4-7,共4页Metallurgical Analysis

摘　　要：在HAc—NaAc(pH6.22)缓冲溶液中,锑(Ⅲ)与5-Br-PADAP在-0.64V(υs.SCE)处有一灵敏、对称的二次导数示波极谱电流,锑(Ⅲ)浓度在0.004～2.5μg/ml与峰高成正比,检出限0.0015μg/ml.配合物至少稳定15h.方法可用于高温合金钢中微量锑的测定.文中研究了其配合比、电流特性及电极反应的可逆性,计算了其条件常数(β)、电子转移数(n)及其系数(α),还讨论了表面活性剂CTMAB对峰电流的增敏机理.The electroactive complex, Sb(Ⅲ)- 5-Br-PADAP is formed in the buffer solution of sodium acetate-acetic acid ( pH 6.22), and appears a sensitive, symmetric second derivative oscillopola-rographic wave p2 at-0.64V (us. SCE). The peak height iP2 is directly proportional to the concentration of Sb (II) in the range of 0.004-2.5ug/ml, the detection limit is 0.0015ug/ml for Sb (Ⅲ). The mechanism of the wave has been investigated. The method is successfully applied to the determination of microamounts of antimony in high-temperature alloy.

关 键 词：锑 5-BR-PADAP 单扫示波极谱 

分 类 号：O657.14[理学—分析化学]