Titration of Potentiometric NH₄VO₃, KH₂PO₄, K₂HPO₄, and their Mixture in Molten NaNO₃ at 350°C Using a Novel Solid‐State Glass/TiO₂ pH Indicator Electrode

A solid‐state Glass/TiO₂ electrode was fabricated using a transparent conductive titanium oxide film on a glass substrate. The coating of the glass substrate was achieved by a novel simple chemical vapor deposition (CVD) procedure. This electrode can be used as an indicator electrode in potentiometric acid‐base titration. This electrode behaves reversibly and responds to the oxide ion concentration in molten nitrate. NH₄VO₃, KH₂PO₄, K₂HPO₄, and their mixture were titrated with Na₂O₂ at 350°C using the glass/TiO₂ electrode in molten NaNO₃.

Keywords:

• Titanium oxide
• thin film titanium oxide
• indicator
• electrodes
• potentiometric titration

The author is in debth for the Deanery of Scientific Research in the Al‐Azhar University of Gaza for their financial support. Thanks are also due to Prof. Issa M. El Nahhal for his fruitful guidance and discussions of the results.