Characteristic evaluation of pencil-drawn carbon electrode by potassium and sodium ion selectivity measurement and energy-dispersive X-ray spectroscopy
Abstract:This paper explains the ion-sensing mechanism and selectivity evaluation of the pencil-drawn carbon electrode (PCE) employed as a pH electrode in the authors’ previous report. The elemental composition of the PCE was found to be C, O, Si, Al, and Na by energy-dispersive X-ray spectroscopy (EDX). The carbon is regarded as the graphite performing electrical conduction, while the other elements formed clay as an ion exchanger. Furthermore, the potential responses to K+ and Na+ were measured, and the selectivity i… Show more
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