Electrodes and Potentiometry

Potentiometry is a method of measuring the potential of an electrochemical cell under static conditions where no current flows through the cell.

Potentiometry is useful because the composition of the electrochemical cell remains unchanged during measurement.

ISE+ portable devices are used for real-time analysis without the need for sample preparation or power (voltmeters).

In very dilute solutions, ions behave independently of each other and exhibit ideal behavior due to complete solvation or infinite dilution.

The presence of ions with the opposite charge reduces the effectiveness of ions as free ions and affects both reactivity and the size of potentials at the measuring electrode.

The purpose of an ISE is to measure the potential or voltage of an electrochemical cell, which provides information about the amount of analyte in a sample.

The selectivity of an ISE is determined by the composition of the membrane, which ideally allows the uptake of only one specific ion into it.

The three main components required for making a measurement at an ISE are an inner reference or standard solution, an outer analyte, and the ISE itself.

The reference electrode in potentiometry provides a constant potential, against which the potential developed at the indicator electrode is measured.

In a very dilute solution, ions behave as if they are independent of each other and do not interact significantly.