铋-芦丁极谱络合吸附波的研究  

Polarographic Adsorptive Complex Wave of Bismuth (Ⅲ)-Rutin

作　　者：包晓玉 李南强[2] 

机构地区：[1]南阳师范专科学校 [2]北京大学化学与分子工程学院,北京100871

出　　处：《分析化学》2000年第2期228-231,共4页Chinese Journal of Analytical Chemistry

摘　　要：在pH4．6Hac-NaAc缓冲溶液中，用单扫示波极谱法可获得灵敏的Bi（Ⅲ）-芦丁（Rt）络会吸附波。在50×10-8～7．0×10-6mol/L范围内铋浓度与峰高呈线性关系，检测限为3．0×10-8mol/L。测定了硫酸锰试剂中铋的含量。测得电活性络合物组成为Bi（Ⅲ）：Rt=1：2，条件形成常数β=3．9×109。测得电极反应转移系数α=0．42，表面电极反应速率常数ks=15.9s-1。In HAc-NaAc buffer solution at pH 4. 6, a sensitive adsorptive complex wave of Bi(Ⅲ) -rutin (Rt) was obtained by single-sweep polarography. The change of peak height with the concentration of bismuth is linear in the range from 5.0×10-8 mol/L to 7.0×10-6 mol/L. The detection limit is down to 3.0×10-8 mol/L. It was used to determine the content of bismuth in manganese sulfate. The composition of the complex was detected as Bi(Ⅲ): Rt = 1: 2. The conditional stability constant was determined as β = 3 .9×109. The rate constant of the surface electrochemical reaction was determined as ks = 15 .9 s-1.

关 键 词：铋 芦丁 单扫极谱法 循环伏安法 铬合吸附波 

分 类 号：O657.1[理学—分析化学]