Potentiometry is an analytical technique used to measure the voltage of an electrochemical cell to determine the concentration of ions in a solution. It involves the use of a reference electrode and an indicator electrode, which respond to the activity of specific ions. The voltage measured is related to the concentration of the ions, allowing for quantitative analysis. This method is widely used in various fields, including environmental monitoring, food quality control, and clinical diagnostics. Potentiometry is valued for its simplicity, speed, and ability to provide real-time results without the need for complex sample preparation.