Potentiometrisessa

Potentiometrisessa refers to a method of chemical analysis that utilizes a potentiometer to measure the potential difference (voltage) of an electrochemical cell. This potential difference is directly related to the concentration of a specific ion or species within a solution. The core principle behind potentiometrisessa analysis is that the electrical potential developed at an electrode is a function of the activity of the ions it is sensitive to.

In a typical potentiometrisessa measurement, an indicator electrode, which responds to the analyte of interest, is immersed in the solution along with a reference electrode. The reference electrode maintains a constant potential, unaffected by the solution's composition. The potentiometer then measures the voltage difference between these two electrodes. As the concentration of the analyte changes, the potential of the indicator electrode changes accordingly, leading to a measurable change in the overall cell potential.

Commonly, this technique is employed with ion-selective electrodes (ISEs), which are designed to be highly specific for a particular ion, such as hydrogen ions (pH measurement), fluoride ions, or chloride ions. By calibrating the electrode system with solutions of known concentrations, a calibration curve can be established. This curve allows for the determination of the unknown concentration of the analyte in a sample by measuring its potential and comparing it to the calibration data. Potentiometrisessa is a versatile and widely used analytical technique due to its simplicity, non-destructive nature, and ability to determine concentrations in real-time.