3.2.2. Potentiometric pH determination by means of W/WO3 electrodes
Potentiometric measurements of the oxidized electrodes, type
A–D, were performed in a series of standard buffer solutions. With
any of the observed electrodes, stable potential value was achieved
within 1 min, while the potential was read after 5 min. Both the
slope of E vs. pH lines and the scatter of the measured E values depended
on the particular preparation procedure applied (Fig. 4).