The automatic potentiometric titrator potentiometric titrator is an apparatus for measuring the end point of titration by measuring the potential change during the titration by potentiometric titration, and is suitable for the volume analysis in which the potential is generally used as a detection index. So what is the detection principle of the automatic potentiometric titrator? Shanghai Bayu introduces you in detail, as follows:
The detection principle of the automatic potentiometric titrator: using the plunger type 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 â–³E/â–³V is greater than the threshold value, it is the equivalent value. When the set condition is met, the instrument goes to the stop program, stops the titration and gives the titration. The measurement result is the working principle of the automatic potentiometric titrator: the ion concentration is measured by measuring the change of the electrode potential.
First, select the appropriate indicator electrode and reference electrode, form a working battery with the solution to be tested, and then add the titrant. During the titration process, the concentration of the measured ions changes continuously due to the occurrence of a chemical reaction, and thus the potential of the indicating electrode changes accordingly. Near the end point of the titration, the concentration of the measured ions is abrupt, causing a sudden jump in the electrode potential, so the titration end point can be determined according to the jump of the electrode potential, and the measurement result is given. The use of automatic potentiometric titrator makes the titration result more accurate, easy to operate, high degree of automation, dynamic feed and quantitative, and can identify multiple equivalence points.
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