Monitoring pH Using Alizarin-modified Commercial Screen-printed Electrodes

Achim Habekost^1,

¹Department of Chemistry, University of Education Ludwigsburg, Reuteallee 46, D-71634 Ludwigsburg, Germany

Cite this paper

Achim Habekost. Monitoring pH Using Alizarin-modified Commercial Screen-printed Electrodes. World Journal of Chemical Education. 2020; 8(4):163-169. doi: 10.12691/WJCE-8-4-4

Abstract

A pH-sensor based on alizarin-modified screen-printed multiwalled carbon nanotubes (MWCNT-SPE, Orion High Technologies) imbedded in Nafion^® shows a linear dependence between the oxidation potential and the pH from pH 0 to pH 10. This modified MWCNT-SPE is compared to a commercial alizarin SPE (DRP 110ALI, Metrohm - DropsSens). In addition to this technical application, these pH sensors seem to be a good didactic alternative to the widely used pH glass electrode, which many students find hard to understand.

Keywords

second-year undergraduate, demonstration, hands-on learning/manipulatives, electrochemistry, analytical chemistry

Copyright

This work is licensed under a Creative Commons Attribution 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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