高等学校化学学报 ›› 1992, Vol. 13 ›› Issue (8): 1060.

• 论文 • 上一篇    下一篇

铋(Ⅲ)-二甲酚橙配合物吸附溶出伏安法的研究

汪振辉, 周漱萍, 刘仙庄   

  1. 河南师范大学化学系, 新乡, 453002
  • 收稿日期:1991-08-06 出版日期:1992-08-24 发布日期:1992-08-24
  • 通讯作者: 周漱萍
  • 基金资助:

    河南省自然科学基金

Studies on the Complex of Bismuth-Xylenoi Orange by Adsorptive Stripping Voltammetry

WANG Zhen-Hui, ZHOU Shu-Ping, LIU Xian-Zhuang   

  1. Department of Chemistry, Henan Normal University, Xinjiang, 453002
  • Received:1991-08-06 Online:1992-08-24 Published:1992-08-24

摘要: 有关二甲酚橙的极谱性能及用其测定铕已进行过研究[1,2]。但未见Bi(Ⅲ)-二甲酚橙配合物吸附溶出伏安分析法的报道。本文提出在pH5的柠檬酸钠-盐酸介质中,形成铋(Ⅲ)-二甲酚橙(XO)配合物吸附富集的溶出伏安法,研究了配合物线性扫描伏安特性,确定了配合物组成比及在汞电极表面的吸附量;确定了吸附等温线模式、吸附自由能。说明该体系可进行开路富集,用拟定的方法测定了生物样品中痕量铋,结果满意.方法特点是测定铋的浓度范围宽,选择性好,灵敏度高。

关键词: 铋, 二甲酚橙, 吸附溶出伏安法

Abstract: In this paper,the determination of the complex of bismuth-xylenol orange by adsorp-tive stripping voltammetry in sodium citrate-HCl medium (pH 5) is proposed.This complex was accumulated on the surface of the mercury electrode in an open circuit.The composition ratio of bismuth and xylenol orange is 1:2.The adsorption character at mercury electrode accords with that of the isothermal line of Frumkin.The adsorption coefficient (β=2.8×106) and the attractive factor (v=0.52) were determined.The mechanism of the complex wave was investigated.This method was applied to the determination of trace amounts of bismuth in human hair and human serum with satisfactory results.

Key words: Bismuth, Xylenol orange, Absorptive stripping voltammetry

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