ion-selective electrode
Quick Summary
An ion-selective electrode (ISE) is an electrochemical sensor that measures the concentration of a specific ion in a solution. It works by using a membrane that preferentially interacts with the target ion, causing a change in electrical potential. This potential difference is measured against a stable reference electrode.1
ISEs are a type of potentiometric indicator electrode and are widely used in analytical chemistry for both qualitative and quantitative analysis. They are particularly useful for measuring ions like hydrogen ions (for pH measurements), but can be designed to detect various other ions depending on the membrane material. Applications include environmental monitoring, medical diagnostics, and industrial process control.213
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