Skip to main content

Research Repository

Advanced Search

Nafion® Coated Electropolymerised Flavanone-based pH Sensor

Miranda, Monica; Carvetta, Clara; Sisodia, Neel; Shirley, Luke; Day, Cristina; McGuinness, Kay; Wadhawan, Jay D.; Lawrence, Nathan S.


Monica Miranda

Clara Carvetta

Neel Sisodia

Luke Shirley

Cristina Day

Kay McGuinness

Nathan S. Lawrence


This work summarizes the electrochemical response of flavanone carbon composite electrodes in comparison with Nafion®-coated flavanone carbon composite electrodes, for use as voltammetric pH sensors in both buffered and low-buffered media. Square wave voltammetric measurements suggest the peak potential achieved from the electrochemical polymerization after the electron-proton oxidation responds with accuracy to buffered pH solutions for both coated and non-coated electrodes, with a potential shift of 55.1 mV and 54.6 mV per pH unit respectively. However, a considerable improvement in stability, accuracy and sensitivity is provided by the proton-transfer Nafion® layer in CO2 bubbled sea water. Furthermore, Nafion®-coated flavanone carbon composite electrodes predicted a pH of 8.04 for the commercial seawater, which is in excellent agreement with the measured pH 8.05 value.


Miranda, M., Carvetta, C., Sisodia, N., Shirley, L., Day, C., McGuinness, K., …Lawrence, N. S. (in press). Nafion® Coated Electropolymerised Flavanone-based pH Sensor. Electroanalysis,

Journal Article Type Article
Acceptance Date Jan 8, 2022
Online Publication Date Jan 9, 2022
Deposit Date Jan 14, 2022
Publicly Available Date Jan 10, 2023
Journal Electroanalysis
Print ISSN 1040-0397
Electronic ISSN 1521-4109
Publisher Wiley
Peer Reviewed Peer Reviewed
Keywords pH; Electropolymerisation; Flavanone Square Wave; Voltammetry; Nafion
Public URL


Accepted manuscript (910 Kb)

Copyright Statement
©2022 The authors. All rights reserved. No part of this publication may be reproduced without the written permission of the copyright holder

You might also like

Downloadable Citations