OBSERVED REDOX INTERFERENCES OF POLY(PYRROLE)-BASED PERCHLORATE-SELECTIVE ELECTRODES

The responses of the poly(pyrrole)-based ion-selective perchlorate ele ctrode were investigated in both perchlorate and redox buffers media. Sensitivity of tested electrodes both to the changes of perchlorate io n concentrations and redox potential of the solution were observed. Sl opes were characteristic: -51.3 mV/dec in the case of perchlorate ion solutions and 61 mV/dec in the case of redox calibration. Potentiometr ic redox sensitivity of the tested poly(pyrrole) layers was observed i n presence of 1 M sodium perchlorate. Potentiometric redox sensitivity of the bare platinum electrode and perchlorate-sensitive electrode ba sed on poly(pyrrole) in presence of 0.1 M NaClO4 were compared.