高等学校化学学报

高等学校化学学报 ›› 1990, Vol. 11 ›› Issue (11): 1195.

• 研究论文 • 上一篇    下一篇

铋(Ⅲ)-8-羟基喹啉-5-磺酸的吸附伏安法研究

孙艳杰, 林树昌, 胡乃非   

  1. 北京师范大学化学系, 100875
  • 收稿日期:1989-07-17 出版日期:1990-11-24 发布日期:1990-11-24
  • 通讯作者: 林树昌
  • 基金资助:

    国家自然科学基金

Studies on Adsorptive Stripping Voltammetry of Bismuth (Ⅲ) with 8-Hydroxy-5-QuinolinesuIfonic Acid

Sun Yanjie, Lin Shuchang, Hu Naifei   

  1. Department of Chemistry, Beijing Normal University, Beijing, 100875
  • Received:1989-07-17 Online:1990-11-24 Published:1990-11-24

PDF (PC)

被引次数

11

摘要： 探讨了8-羟基喹啉-5-磺酸(HQSA)和络合物Bi(Ⅲ)-HQSA的电化学性质,特别是它们在汞电极上的吸附性。在pH=7.0的磷酸盐底液中,Bi(Ⅲ)-HQSA有一灵敏还原峰,为反应物弱吸附,Epc=-0.44V(vs.饱和Ag/AgCl)。据此建立了吸附伏安法测定铋的新方法,检测限为2.0×10-9mol/L,线性范围5.0×10-9～1.0×10-6mol/L。

关键词: 铋, 8-羟基喹啉-5-磺酸, 吸附伏安法

Abstract: In the supporting electrolyte containing KH2PO4 and K2HPO4 (pH = 7.0), 8-hydroxy-5- quinolinesulfonic acid (HQSA) can be adsorbed on the Hg electrode above -0.60 V (vs. Ag/AgCl electrode), thus the complex of Bi( Ⅲ ) with HQSA can also be adsorbed on the Hg electrode. The reduction peak of Bi( Ⅲ )-HQSAsystem Ep=-0.44 V) results from the reduction of Bi( Ⅲ ) into bismuth amalgam, belonging to a weakly adsorptive system of reactant. The electrochemical behaviour, especially the adsorptive properties of both HQSAand Bi( Ⅲ )-HQSA were studied by various methods. The reduction peak of Bi( Ⅲ )-HQSA can be used to determine trace amount of Bi( Ⅲ ) by linear sweep adsorptive stripping voltammetry. The peak hight is linearly proportional to the concentration of Bi( Ⅲ ) in the range of 5.0×10-9-1.0×10-6 mol/L. The detection limit of Bi( Ⅲ ) is 2.0× 10-9 mol/L.

Key words: Bismuth, 8-Hydroxy-5-Quinolinesulfonic acid, Adsorptive stripping voltammetry

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