Volume 2, 2023

Ion-transfer electroanalytical detection of perfluorooctanoic acid at a liquid–liquid micro-interface array

Abstract

Per- and polyfluoroalkyl substances (PFAS) are synthetic materials that bioaccumulate and are environmentally persistent. Due to their serious health threats, including to humans, new methods for the sensing of PFAS are needed. Here, we report the electrochemical behaviour of perfluorooctanoic acid (PFOA) via ion transfer voltammetry at an array of microinterfaces between two immiscible electrolytic solutions (μITIES). Investigation of electrochemical sensing of PFOA at the μITIES array by voltammetry showed that differential pulse stripping voltammetry (DPSV) with a 300 s preconcentration time was the most sensitive approach. This enabled a limit of detection (LOD) of 1.2 nM. Matrix effects of different types of samples, like tap water, and aqueous phases spiked with a protein (bovine serum albumin) or complexing reagent (β-cyclodextrin), on the analytical performance of PFOA were evaluated. The findings presented here provide a basis for sensing of PFOA using ion transfer voltammetry.

Graphical abstract: Ion-transfer electroanalytical detection of perfluorooctanoic acid at a liquid–liquid micro-interface array

Supplementary files

Article information

Article type
Paper
Submitted
06 Apr 2023
Accepted
22 Jun 2023
First published
23 Jun 2023
This article is Open Access
Creative Commons BY-NC license

Sens. Diagn., 2023,2, 938-947

Ion-transfer electroanalytical detection of perfluorooctanoic acid at a liquid–liquid micro-interface array

H. B. Lamichhane and D. W. M. Arrigan, Sens. Diagn., 2023, 2, 938 DOI: 10.1039/D3SD00080J

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