Metrohm, 6.045.1100, Combined Pt ring electrode

The Metrohm combined platinum ring electrode measures redox potential during potentiometric titrations that involve changes in sample pH. Its platinum indicator ring is integrated with a reference assembly incorporating a ceramic pin diaphragm, allowing a single sensor to follow electrochemical endpoint changes. Typical applications include oxygen determination by the Winkler method, permanganate titration of hydrogen peroxide and diazotization titrations. The electrode uses 3 mol/L KCl for both its reference electrolyte and storage, which helps support stable junction conditions in suitable aqueous methods. It provides an alternative to separate indicator and reference electrodes where the analytical procedure calls for a combined redox design. Analysts can apply the sensor in chemical and water-testing laboratories that use compatible Metrohm titration systems.