Potentiometric titration of hematite and magnetite at elevated temperatures using a ZrO2-based pH probe

- In situ potentiometric titration is performed at 100 °C < T < 200 °C.
- A ZrO2 based pH probe coupled with a EPBRE are employed for pH measurement.
- Common intersection point (pHcip) for magnetite and hematite is measured.
- pH at inflection point for magnetite and hematite is measured.