- Title
- Smartphone-based / fluoro-SPE for selective detection of PFAS at ppb level
- Creator
- Al Amin, Md.; Sobhani, Zahra; Chadalavada, Sreenivasulu; Naidu, Ravi; Fang, Cheng
- Relation
- Environmental Technology & Innovation Vol. 18, no. 100778
- Publisher Link
- http://dx.doi.org/10.1016/j.eti.2020.100778
- Publisher
- Elsevier
- Resource Type
- journal article
- Date
- 2020
- Description
- 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.
- Subject
- PFAS; F-SPE; smartphone; app based reading
- Identifier
- http://hdl.handle.net/1959.13/1438392
- Identifier
- uon:40593
- Identifier
- ISSN:2352-1864
- Language
- eng
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