Smartphone-based / Fluoro-SPE for selective detection of PFAS at ppb level

Al Amin, Md. and Sobhani, Zahra and Chadalavada, Sreenivasulu ORCID: https://orcid.org/0000-0002-5000-8313 and Naidu, Ravi and Fang, Cheng (2020) Smartphone-based / Fluoro-SPE for selective detection of PFAS at ppb level. Environmental Technology and Innovation, 18:100778. pp. 1-8.

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Abstract

Fluoro-solid phase extraction (fluoro-SPE) has been well established to selectively extract targets after they have been fluoro-tagged. Here we report that this technique can also be used to selectively extract fluorosurfactants of PFAS (per- and poly-fluoroakyl substances), which have fluoro-carbon skeletons, from other anionic surfactants that have no fluoro-carbon skeletons. We advance the fluoro-SPE protocol to enable the extraction of fluorosurfactants using 4-5 times (in volume) more solvent for fluorophilic eluting in effort to overcome the strong interaction between the fluorosurfactants and the fluoro-Gel. Based on a smartphone-based app we developed recently to assess the colouration of fluorosurfactants with a dye (ethyl violet) that is similar to MBAS (methylene blue active substances), plus an SPE for pre-concentration and fluoro-SPE for pre-selection, we successfully achieve a detection limit of 1 ppb for the PFAS including perfluorooctanoic acid (PFOA), perfluorooctanesulfonic acid (PFOS) and 6:2 fluorotelomer sulfonate (6:2FTS), which is encouraging and can be conducted in a general laboratory.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 06 Mar 2022 22:58
Last Modified: 04 Apr 2022 07:47
Uncontrolled Keywords: App based reading; F-SPE; PFAS; Smartphone
Fields of Research (2020): 40 ENGINEERING > 4011 Environmental engineering > 401199 Environmental engineering not elsewhere classified
Identification Number or DOI: https://doi.org/10.1016/j.eti.2020.100778
URI: http://eprints.usq.edu.au/id/eprint/47323

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