Introduction to the working principle of Automatic Potential Titrator
Automatic Potential Titrator is a common analytical instrument designed for capacity analysis based on the principle of potentiometric method.
The principle of the potentiometric method is: select the appropriate indicator electrode and reference electrode to form a working battery with the measured solution. With the addition of the titrant, the concentration of the measured ions changes continuously due to the chemical reaction, so the potential of the indicator electrode Change accordingly. Near the titration end point, the measured ion concentration changes suddenly, causing a jump in the electrode potential. Therefore, the titration end point can be determined according to the jump in the electrode potential.
Automatic Potential Titrator consists of two parts, the electrometer and the titration system. The electrometer uses an electronic amplification control circuit to compare the potential between the indicator electrode and the reference electrode with a preset end point potential, and the difference between the two signals is amplified. Then control the dripping speed of the titration system. The titration stops automatically when the end point preset potential is reached. The manufacturer of Automatic Potential Titrator tells you that the instrument is controlled by a microcomputer, and its structure is divided into two parts: an electrometer and a titration system.