Page 48 - Pharmaceutical Analytical Chemistry II - Pharm D Clinical- 07-PA202
P. 48
Potentiometry
- Analysis by Measuring Electrode Potentials
- It is an electro-analytical method in which electrode potential is
correlated to concentration of analyte
- The potential is measured without drawing a current from the
electrochemical cell (Galvanic)
Potentiometric measurements:
Potentiometric measurements are made using a potentiometer
Potentiometer
A device for measuring the potential of an electrochemical cell
without drawing a current or altering the cell’s composition.
It has three parts:
- Indicator electrode (selective for the analyte of interest) ---
works as cathode (right half-cell).
47
