potenziometrica

Potenziometrica is a term related to potentiometry, a branch of analytical chemistry. Potentiometry involves measuring the difference in electrical potential between two electrodes in an electrochemical cell. This potential difference is directly related to the concentration of a specific ion or species in a solution.

The core principle of potentiometry lies in the Nernst equation, which establishes a relationship between the electrode potential and the activity (closely related to concentration) of the analyte. A common setup involves a working electrode, which is sensitive to the ion being measured, and a reference electrode, which maintains a stable and known potential.

Potentiometric methods are widely used for determining the concentration of various substances, including pH measurements using a pH meter, ion-selective electrode (ISE) measurements for ions like fluoride, chloride, or potassium, and redox titrations. The advantages of potentiometry include its non-destructive nature, relatively simple instrumentation, and the ability to perform measurements directly in complex matrices. Accuracy and precision depend on factors such as proper electrode calibration, temperature control, and minimizing interference from other species in the solution.