Automatic potentiometric principle

Automatic potentiometric titrator, suitable for capacity analysis with potential as the detection index, can be used as a special instrument for penicillin detection.

Detection principle: The automatic potentiometric titrator adopts the plunger titration method. The titration process of the plunger is controlled by the single-chip microcomputer, and the dynamic signal of the electrode is collected. During the titration process, the solution in the titration cell produces different potential changes. When the potential change of △E/ΔV is greater than the threshold value, it is the equivalent point value. When the set condition is met, the instrument goes to the system stop and stops the titration and gives The measurement results.

The working principle of the automatic potentiometric titrator is to measure the ion concentration by measuring the change of the electrode potential. First select the appropriate indicator electrode and reference electrode, make up a working battery with the tested solution, and then add the titrant. During the titration process, due to a chemical reaction, the concentration of the measured ions constantly changes, and the potential of the indicator electrode changes accordingly. Near the end of the titration, the concentration of the measured ion mutated, causing a jump in the potential of the electrode. Therefore, the endpoint of the titration can be determined based on the sudden change of the electrode potential, and the measurement result is given.

Automatic potentiometric titrator features: more accurate titration results, all Chinese display, easy operation, higher degree of automation, with dynamic feed and quantitative feed method, can determine multiple equal points.