The methodology of opto-electrochemical detection of "forever chemical" perfluorooctanoic acid (PFOA) at ppt level is developed. The approach consists in cathodic pre-concentration of PFOA on the surface of biochar- modified screen-printed electrodes (BC-SPE) followed by its defragmentation into partially hydrogenated PFOA chains and release of proportional amount of F- ions. The F- concentration was estimated with on- paper-based optical sensor array based on silicon and aluminum corrolates, SiTTC and AlTPF5C respectively. The data of BC-SPE electroreduction currents, fluorescence and luminescence intensity of SiTTC and AlTPF5C -based optodes fused together were used to construct PLS1 calibration model that has permitted PFOA quantification in concentration range from 40 ng/l to 4 mg/l with the lowest detection limit of 15 ppt and R-2 of 0.896.
Pizzoli, F., Caroleo, F., Nardis, S., Paolesse, R., Micheli, L., Cancelliere, R., et al. (2024). Towards selective detection of “forever chemicals”: development of opto-electrochemical sensor array for perfluorooctanoicacid (PFOA). In 2024 IEEE International Symposium on Olfaction and Electronic Nose (ISOEN) (pp.1-3). IEEE [10.1109/ISOEN61239.2024.10556380].
Towards selective detection of “forever chemicals”: development of opto-electrochemical sensor array for perfluorooctanoicacid (PFOA)
Pizzoli F.;Caroleo F.;Nardis S.;Paolesse R.;Micheli L.;Cancelliere R.;Lvova L.
2024-01-01
Abstract
The methodology of opto-electrochemical detection of "forever chemical" perfluorooctanoic acid (PFOA) at ppt level is developed. The approach consists in cathodic pre-concentration of PFOA on the surface of biochar- modified screen-printed electrodes (BC-SPE) followed by its defragmentation into partially hydrogenated PFOA chains and release of proportional amount of F- ions. The F- concentration was estimated with on- paper-based optical sensor array based on silicon and aluminum corrolates, SiTTC and AlTPF5C respectively. The data of BC-SPE electroreduction currents, fluorescence and luminescence intensity of SiTTC and AlTPF5C -based optodes fused together were used to construct PLS1 calibration model that has permitted PFOA quantification in concentration range from 40 ng/l to 4 mg/l with the lowest detection limit of 15 ppt and R-2 of 0.896.File | Dimensione | Formato | |
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