期刊
SENSORS
卷 9, 期 6, 页码 4955-4985出版社
MDPI
DOI: 10.3390/s90604955
关键词
pH sensor; platinum metal oxides; RuO2; IrO2; reference electrode; hydrogen electrode; capacitance
Novel applications of online pH determinations at temperatures from -35 degrees C to 130 degrees C in technical and biological media, which are all but ideal aqueous solutions, require new approaches to pH monitoring. The glass electrode, introduced nearly hundred years ago, and chemical sensors based on field effect transistors (ISFET) show specific drawbacks with respect to handling and long-time stability. Proton sensitive metal oxides seem to be a promising and alternative to the state-of-the-art measuring methods, and might overcome some problems of classical hydrogen electrodes and reference electrodes.
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