Sodium liquid ion exchanger microelectrode used to measure large extracellular sodium transients

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Science  12 Nov 1976:
Vol. 194, Issue 4266, pp. 725-726
DOI: 10.1126/science.982036


A new liquid membrane microelectrode has been developed that is easily fabricated and can measure fast sodium transients in the presence of potassium interference. It responds to a sudden change in sodium activity within 1 second. The electrode has been used to provide the first direct evidence of large sodium transients in the extracellular space of the brain of the catfish.