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  • Title: Neutral carrier sodium ion-selective microelectrode for extracellular studies.
    Author: Ammann D, Anker P.
    Journal: Neurosci Lett; 1985 Jun 24; 57(3):267-71. PubMed ID: 4034095.
    Abstract:
    A Na+-selective microelectrode based on a synthetic neutral carrier (ETH 157) is described. The selectivities in respect to K+, Ca2+ and Mg2+ are adequate for extracellular measurements of Na+ activities. Microelectrodes with tip diameters of about 0.7 micron have an electrical resistance of 3 X 10(10) omega and a 90% response time of less than or equal to 3 s. The drift of the potential difference of the Na+-microelectrode cell assembly in aqueous extracellular electrolyte solutions is less than or equal to 0.2 m V/3 h.
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