CONICET | Buscador de Institutos y Recursos Humanos

A simple procedure to make an iridium oxide (IrO2) electrodeposited pHsensor, that can be used in a chemical, biomedical, or materials laboratory is presentedhere. Some exercises based on this sensor that can be used to teach importantconcepts in the field of biomedical, biochemical, tissue or materials engineering, are alsopresented. This novel procedure is based on the electrodeposition of IrO2 on a stainlesssteel electrode, which uses a similar mechanism of an ion selective electrode (ISE) andsenses changes in pH. The simplicity and cost effectiveness of this method facilitatesthe teaching of the concept of half cell potential and the basics of sensors. This novelsensor has also been shown to out-perform the classical glass pH-sensor. In this newmethodology students learn to build the electrode, to calibrate it, and to measure itssentivity, repeatability and time-response.