| Titre : |
Colorimetric sensor based on polymeric thin film for arsenic quantitation using colour response calibration |
| Type de document : |
texte imprimé |
| Auteurs : |
Saowanee Toonchue, Auteur ; Nakara Bhawawet, Auteur ; Apichat Imyim, Auteur |
| Année de publication : |
2023 |
| Article en page(s) : |
p. 294-305 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Analyse quantitative (chimie)
Capteurs chimiques
Chimie analytique
Colorimétrie
Etalonnage
|
| Index. décimale : |
545 Analyse quantitative |
| Résumé : |
A simple, low-cost and portable sensor for colorimetric determination of As(III) was developed. The sensing is carried out using a microcentrifuge tube as a mini-reactor, where an Fe(III)-1,10-phenanthroline doped polyvinyl alcohol thin film is cast on the underside of the cap. Once Fe(III)-1,10-phenanthroline is reduced by arsine gas generated in situ from As(III), yielding the Fe(II)-1,10-phenanthroline complex, the red coloured product can be detected using colour analysis software. The As(III) content is then determined based upon the colour intensity of Fe(II)-1,10-phenanthroline on the film. Experimental conditions were optimised, and parameters affecting the complex formation and arsenic speciation were investigated. The method developed proved to be a selective colorimetric sensor for As(III). More significantly, the device could be directly used to detect As(III) in the field without any sample preparation requirements. The recovery for industrial wastewater and groundwater was found to be 97.5%-104.0%. Hence, the thin film-based test kit is easy to operate, portable and practical for the measurement of As(III) in the field. |
| Note de contenu : |
- EXPERIMENTAL : Materials and apparatus - Film preparation and characterisation - Sensing system and colour parameter processing - Optimisation of the sensing system - Precision study - Colour response calibration -
Interference study and real sample analysis
- RESULTS AND DISCUSSION : Film characterisation - Optimisation of the sensing system - Precision study - Colour response calibration - Interference study and real samples analysis
- Table 1 : Results of determination of spiked As(III) in water samples using the proposed method compared with the standard method
- Table 2 : Comparison of the proposed method with alternative methods for on-site colorimetric detection for arsenic |
| DOI : |
https://doi.org/10.1111/cote.12646 |
| En ligne : |
https://onlinelibrary.wiley.com/doi/epdf/10.1111/cote.12646 |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39539 |
in COLORATION TECHNOLOGY > Vol. 139, N° 3 (06/2023) . - p. 294-305
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