中华医学超声杂志

应用化学 ›› 1985, Vol. 0 ›› Issue (1): 60-63.

• 研究简报 • 上一篇    下一篇

SEM-K1型钾微电极的研制

漆德瑶, 应太林   

  1. 上海工业大学分析化学教研室
  • 收稿日期:1984-08-10 修回日期:1984-10-15 出版日期:1985-03-10 发布日期:1985-03-10
  • 基金资助:
    中国科学院科学基金

FABRICATION OF PVC MATRIX MFMBRANE POTASSIUM ION-SELECTIVE MICROELECTRODE

Qi Deyao, Ying Tailin   

  1. Analytical Chemistry Section, Shanghai University of Technology
  • Received:1984-08-10 Revised:1984-10-15 Published:1985-03-10 Online:1985-03-10

PDF

347

被引次数

5

摘要： 离子选择性微电极可直接插入生物体内测定细胞体液的成分及其变化,近年工作进展较快,国内尖端直径达微米级的微电极的研制工作尚未见报导[1]。

Abstract: A potassium ion-selective microelectrode based on incorporating valinomycin in the PVC matrix membrane has been designed and constructed. It isa needle shaped electrode made of glass with a tip outer diameter of 5-10μm.The concentration calibration curve of the electrode is linear over concentration range of 1?10-4-1?10-1M of K+, with detection limit 2.0?10-5MK+ and a slope 54 mV per decade. The working pH ranges 3-10. The selectivity coefficient KK,Napot is 1.12?10-4. The values of selectivity coefficients forsome principal interferences, such as Li+, NH4+, Ca2+, Ba2+, Mg2+, havealso been determined. The electrode can be applied in studying physiological,biochemical and clinical phenomena related to K+ activties.

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