Solid contact micropipette ion selective electrode II: Potassium electrode for SECM and in vivo applications

Gergely Gyetvai, Lívia Nagy, Ari Ivaska, István Hernadi, Géza Nagy

Research output: Contribution to journalArticle

18 Citations (Scopus)


Micropipette ion selective electrodes are very small, but fragile, short-life time sensors with very high resistance. Their high resistance is a draw back considering application in scanning electrochemical microscopy (SECM) and in life sciences. New, low resistance potassium micropipette electrodes were prepared, and applied. The electrode contains solid internal contact made of a carbon fiber lowered down all the way close to the orifice of the micropipette. The internal contact potential was kept constant by applying a doped, electrochemically prepared PEDOT coating on the fiber surface. The electrode performed well in in vivo experiments both in plant and animal tissue without capacitance neutralization and in SECM.

Original languageEnglish
Pages (from-to)1970-1976
Number of pages7
Issue number17-18
Publication statusPublished - Sep 1 2009



  • Bean plant (Phaseolus vulgaris)
  • In vivo potassium ion measurement
  • Potassium
  • Rat brain
  • Scanning electrochemical microscopy (SECM)
  • Solid contact micropipette ion selective electrode

ASJC Scopus subject areas

  • Analytical Chemistry
  • Electrochemistry

Cite this