This study demonstrates that tungsten rotating disk electrode can be used for pH or H+/OH concentration
measurements in practically entire pH range, using the combination of voltammetric and potentiometric
techniques. In strong acidic (c(H+) > 103 mol dm3), and alkaline (c(OH) > 103 mol dm3)
solutions, rotating tungsten disk electrode can be used as a maintenance-free electrode for voltammetric
determination of H+ and OH ion concentration.