Artículo
Highly selective and sensitive fluorescent determination of Fe3+ within alcoholic beverages with 1,5-diphenylcarbazone-functionalized graphene quantum dots
Llaver, Mauricio
; Barrionuevo, Santiago
; Troiani, Horacio Esteban
; Wuilloud, Rodolfo German
; Ibañez, Francisco Javier
Fecha de publicación:
08/2023
Editorial:
Elsevier
Revista:
Talanta Open
ISSN:
2666-8319
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Herein, we report the synthesis of graphene quantum dots (GQDs) functionalized with 1,5-diphenylcarbazone for the selective quantification of Fe in wine, via front-face fluorescence. Crystalline GQDs are obtained via a clean and relatively size-controlled synthesis based on the electrochemical exfoliation from a graphene foam. The product of the synthesis was later functionalized to solely detect Fe3+ amongst various other ions present within the sample. The detection is based on quenching the fluorescence emission from the functionalized nanomaterial in the presence of the analyte, which follows a linear relationship with the concentration of the analyte, consistent with the Stern-Volmer model. Diverse parameters involved in the measurements, including the pH and excitation wavelength, were optimized, giving place to limits of detection (LOD) of 0.014 mg L−1 and 0.11 mg L−1 in waters and white wines, respectively. A soft UV-based digestion and a profound analysis of interferences were key factors to achieve such LODs. Furthermore, front-face fluorescence measurements improved the applicability of the method by avoiding the commonly occurring matrix shielding effects. We believe that the sensitive, selective, and fast detection of Fe3+ within real (i.e.; wine) samples represents a major step forward in the field.
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Articulos(CCT - PATAGONIA NORTE)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - PATAGONIA NORTE
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - PATAGONIA NORTE
Articulos(ICB)
Articulos de INSTITUTO INTERDISCIPLINARIO DE CIENCIAS BASICAS
Articulos de INSTITUTO INTERDISCIPLINARIO DE CIENCIAS BASICAS
Articulos(INIFTA)
Articulos de INST.DE INV.FISICOQUIMICAS TEORICAS Y APLIC.
Articulos de INST.DE INV.FISICOQUIMICAS TEORICAS Y APLIC.
Citación
Llaver, Mauricio; Barrionuevo, Santiago; Troiani, Horacio Esteban; Wuilloud, Rodolfo German; Ibañez, Francisco Javier; Highly selective and sensitive fluorescent determination of Fe3+ within alcoholic beverages with 1,5-diphenylcarbazone-functionalized graphene quantum dots; Elsevier; Talanta Open; 7; 100202; 8-2023; 1-10
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