Ion-selective electrode

Sensor of ion concentration in a solution

An ion-selective electrode (ISE), also known as a specific ion electrode (SIE), is a transducer that converts the change in the concentration of a specific ion dissolved in a solution into an electrical potential. The voltage is theoretically dependent on the logarithm of the ionic activity, according to the Nernst equation. Ion-selective electrodes are used in analytical chemistry and biochemical/biophysical research, where measurements of ionic concentration in an aqueous solution are required.

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