| Autor: |
Ryo IWASAKI, Junya UCHIDA, Yudai YAMANA, Yui NAKAMURA, Kohji MAEDA, Shingo SOTOMA, Yumi YOSHIDA |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
Electrochemistry, Vol 91, Iss 8, Pp 087004-087004 (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2186-2451 |
| DOI: |
10.5796/electrochemistry.23-00066 |
| Popis: |
Coulometric determination of perfluorooctane sulfonate (PFOS−) and perfluorohexanesulfonate (PFHxS−), which are ionic perfluoroalkyl substances (PFAS ion), was demonstrated with a thin-layer electrolysis flow cell for the ion transfer (flow-TLECIT). Flow-TLECIT has a simple structure consisting of a Ag/AgCl plate electrode, a spacer with a flow path for aqueous sample solution, an organic liquid membrane hold in the porous membrane, and the conducting polymer paste-coated carbon electrode. The conductive polymer paste was made of poly(3,4-ethylenedioxythiophene) modified with lauryl-terminated bispoly(ethyleneglycol) (PEDOT-PEG) for screen-printing the conducting polymer on the carbon electrode. Flow-TLECIT achieved the complete mass transfer of PFAS ion from the aqueous sample solution to the organic membrane under applying a constant potential between the Ag/AgCl plate electrode and the conducting polymer paste-coated carbon electrode and detects the transfer of PFAS ion as current. The integrated current (electrical charge) can be converted to the mole amount of PFAS ion. For PFHxS−, the evaluated amount was 97 %–103 % of the theoretical mole amount in the concentration range of 5–200 µM and the repeatability in the same cell were ±1 %–±5 % (n = 8). For PFOS−, the evaluated amount was 102 % of the theoretical mole amount in the concentration of 18.3 µM and the repeatability in the same cell is ±4 % (n = 3). Flow-TLECIT has advantages such as (1) the flow system suitable for continuous measurement, (2) a simple and inexpensive device, and (3) calibration-free. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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