Method of generating a constant derivation potential and a reference electrode in analytical chemistry

摘要

In connection with a method for generating a constant derivation potential in analytical chemistry by means of a pH measuring chain containing a reference electrode, in particular for a pH test electrode for use in the meat-processing industry or for measurements in semi-solid substances such as cheese, pastes, in which for carrying out the measurement at least the pH measuring electrode is introduced into the medium to be measured by a corresponding movement, it is proposed that every time the pH measuring electrode is introduced into the medium to be measured, the electrolyte solution of the reference electrode, which is to be brought into contact with the medium to be measured via a diaphragm, be compressed whereby the diaphragm of the reference electrode, which gets into contact at least with the outer surface of the medium to be measured, is subjected to a cleaning action due to the pressure rise in the electrolyte solution occurring simultaneously with such compression.