高等学校化学学报

高等学校化学学报 ›› 1988, Vol. 9 ›› Issue (12): 1233.

• 论文 • 上一篇    下一篇

金属电极上中和滴定的研究(Ⅰ)——零电流示波双电位滴定法

谢远武, 高鸿   

  1. 南京大学化学系
  • 收稿日期:1987-06-24 出版日期:1988-12-24 发布日期:1988-12-24
  • 通讯作者: 谢远武
  • 基金资助:

    国家自然科学基金

Neutralization Titration with Metal Electrodes (Ⅰ)——Zero-Current Oscillographic Potentiometric Neutralization Titration on Two Indicator Electrodes

Xie Yuanwu, Gao Hong(H. Kao)   

  1. Department of Chemistry, Nanjing University, Nanjing
  • Received:1987-06-24 Online:1988-12-24 Published:1988-12-24

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摘要： 研究了在Hg(Ag)、Pt、Sb、W4种金属电极上的零电流示波双电位中和滴定法。从阳极极化的Hg(Ag)、Pt电极和经蒸馏水浸泡的Sb、W电极中,任取两支相同或相异金属作成的一对电极皆可用于酸碱滴定;对更稀的酸碱,可用一支经阳极极化和一支未极化的电极。该法简单、准确、直观、快速。初步探讨了Cl-影响Hg(Ag)、Pt电极电位滴定曲线的机理。

关键词: 示波双电位滴定, 示波滴定, 金属电极上的中和滴定

Abstract: Zero-current oscillographic potentiometric neutralization titration on two indicator electrodes was studied. Any combination of two electrodes from Hg(Ag), Pt (anodized in 0.1mol/dm3 H2SO4 at 1.5V vs. S C E), Sb and W(soaked in distilled water) can be used for 0. 1~0.01mol/dm3 acid-base titrat-ions. For more dilute acid or base solutions, one can use an anodized electrode and an unanodized one. Polyacid can also be titrated. Compared with other methods,this method is simple, accurate, intuitive, rapid and sensitive. The effect of Cl- on Hg(Ag), Pt electrodes during the titration is also discussed.

Key words: Oscillographic titration, Neutralization titration on metal electrodes Oscillographic bipotentiometric titration

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