高等学校化学学报 ›› 1994, Vol. 15 ›› Issue (2): 193.

• 研究快报 • 上一篇    下一篇

一种新的磷酸根离子敏感电极研究

肖丹, 俞汝勤, 李军, 袁孔铨   

  1. 湖南大学化学化工系, 长沙, 410082
  • 收稿日期:1993-08-03 修回日期:1993-12-06 出版日期:1994-02-24 发布日期:1994-02-24
  • 通讯作者: 俞汝勤
  • 作者简介:肖丹,男,32岁,博士研究生,讲师.
  • 基金资助:

    国家自然科学基金

A New Phosphate Ion Sensitive Electrode

XIAO Dan, YU Ru-Qin, LI Jun, YUAN Kong-Quan   

  1. Department of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082
  • Received:1993-08-03 Revised:1993-12-06 Online:1994-02-24 Published:1994-02-24

关键词: 磷酸根, 离子选择电极, 磷酸二氢根

Abstract: Near thirty years have passed since the first attempt to develop a selective electrode for phosphate and no substantial progress has been made because all reported electrodes have poor selectivity, reproducibility or short lifetime.In this report, we describe a phosphate ion sensitive electrode based on cobalt, which is easily available for practical application in determination of phosphate concentration.The detection limit of 8×10-6mol/Land a linear range of response from 1×10-5mol/L to 1×10-2mol/L for dihydrogen phosphate activity with a slope of 56mV/dec.are obtained in pH 4.0 buffer solutions.The electrode has an excellent selectivity for the dihydrogen phosphate with respect to many common anions such as sulfale,chloride,nitrate and acetate.The electrode shows a long term stability and reproducibility of response for the dihydrogen phosphate.

Key words: Phosphate, Ion selective electrode, Dihydrogen phosphate

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