Metal-Metal Oxide and Metal Oxide Electrodes as pH Sensors.

摘要: The pH is one of the most important parameters for char-acterizing chemical properties an aqueous solution. glass eiectrode by far commonly used sensor. determination in special situations, e.g., vivo applications where fragility electrode a draw-back, requires sensors that can easily be miniaturized and built into physically rugged sleeves. Also, other volume solution very restricted miniaturization important. does not respond properly to some corrosive environments (e.g., hydrogen fluoride [HF] solutions). At present, among alternatives hydrogen-selective group sensors, potentiometric metal-metal oxide pH, ideally due equilibrium involving metal its oxide. In case electrodes, involved potential-determining reaction. This distinction course clear many cases because mechanism giving response always unequivocal.