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Neutral carrier sodium ion-selective microelectrode for extracellular studies

Authors
Journal
Neuroscience Letters
0304-3940
Publisher
Elsevier
Publication Date
Volume
57
Issue
3
Identifiers
DOI: 10.1016/0304-3940(85)90503-8
Keywords
  • Microelectrode
  • Sodium-Selective
  • Neutral Carrier
  • Extracellular

Abstract

Abstract A Na +-selective microelectrode based on a synthetic neutral carrier (ETH 157) is described. The selectivities in respect to K +, Ca 2+ and Mg 2+ are adequate for extracellular measurements of Na + activities. Microelectrodes with tip diameters of about 0.7 μm have an electrical resistance of 3 × 10 10 Ω and a 90% response time of ≦ 3 s. The drift of the potential difference of the Na +-microelectrode cell assembly in aqueous extracellular electrolyte solutions is ≦0.2 mV 3 h .

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