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

Article

Al Amin, Md., Sobhani, Zahra, Chadalavada, Sreenivasulu, Naidu, Ravi and Fang, Cheng. 2020. "Smartphone-based / Fluoro-SPE for selective detection of PFAS at ppb level." Environmental Technology and Innovation. 18, pp. 1-8. https://doi.org/10.1016/j.eti.2020.100778
Article Title

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

ERA Journal ID210427
Article CategoryArticle
AuthorsAl Amin, Md. (Author), Sobhani, Zahra (Author), Chadalavada, Sreenivasulu (Author), Naidu, Ravi (Author) and Fang, Cheng (Author)
Journal TitleEnvironmental Technology and Innovation
Journal Citation18, pp. 1-8
Article Number100778
Number of Pages8
Year2020
PublisherElsevier
Place of PublicationNetherlands
ISSN2352-1864
Digital Object Identifier (DOI)https://doi.org/10.1016/j.eti.2020.100778
Web Address (URL)https://www.sciencedirect.com/science/article/pii/S2352186420302054
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.

KeywordsApp based reading; F-SPE; PFAS; Smartphone
ANZSRC Field of Research 2020401199. Environmental engineering not elsewhere classified
Byline AffiliationsUniversity of Newcastle
Institution of OriginUniversity of Southern Queensland
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