Exploring the potential of cellulose autofluorescence for optical detection of tannin in red wines.

Autor: Teodoro KBR; Nanotechnology National Laboratory for Agriculture (LNNA), Embrapa Instrumentation, 13560-970 São Carlos, SP, Brazil. Electronic address: kbr.teodoro@gmail.com., Silva MJ; Nanotechnology National Laboratory for Agriculture (LNNA), Embrapa Instrumentation, 13560-970 São Carlos, SP, Brazil; PPGQ, Department of Chemistry, Center for Exact Sciences and Technology, Federal University of São Carlos (UFSCar), 13565-905 São Carlos, SP, Brazil., Andre RS; Nanotechnology National Laboratory for Agriculture (LNNA), Embrapa Instrumentation, 13560-970 São Carlos, SP, Brazil., Schneider R; Nanotechnology National Laboratory for Agriculture (LNNA), Embrapa Instrumentation, 13560-970 São Carlos, SP, Brazil; PPGQ, Department of Chemistry, Center for Exact Sciences and Technology, Federal University of São Carlos (UFSCar), 13565-905 São Carlos, SP, Brazil., Martins MA; Nanotechnology National Laboratory for Agriculture (LNNA), Embrapa Instrumentation, 13560-970 São Carlos, SP, Brazil., Mattoso LHC; Nanotechnology National Laboratory for Agriculture (LNNA), Embrapa Instrumentation, 13560-970 São Carlos, SP, Brazil., Correa DS; Nanotechnology National Laboratory for Agriculture (LNNA), Embrapa Instrumentation, 13560-970 São Carlos, SP, Brazil. Electronic address: daniel.correa@embrapa.br.
Jazyk: angličtina
Zdroj: Carbohydrate polymers [Carbohydr Polym] 2024 Jan 15; Vol. 324, pp. 121494. Date of Electronic Publication: 2023 Oct 14.
DOI: 10.1016/j.carbpol.2023.121494
Abstrakt: The growing demand for opto-electronic devices within an automated landscape has opened up new opportunities for harnessing sustainable cellulose materials for sensors technology. Cellulose, a versatile material, enables its combination with other materials, but in most of these applications, cellulose is typically employed as support or substrate, while its inherent autofluorescence remains largely underexplored for sensors. In light of this context, this study delves into the autofluorescence characteristics of pristine cellulose nanocrystals extracted from wood via enzymatic route for optical sensors tailored to detect tannins. By fine-tuning the experimental setup, photoluminescence (PL) emission bands were scrutinized across three distinct spectral regions, namely 300-400 nm, 400-500 nm and 550-700 nm. The proposed mechanism reveals the occurrence of dynamic fluorescence quenching, which enabled the selective monitoring of tannins in red wines across a dynamic range spanning from 10 to 1060 μg mL -1 . This sensing platform provided a limit of detection (LoD) of 6.1 μg mL -1 . Notably, the sensing platform's efficacy was validated with remarkable recovery rates of 99.7 % and 95.3 % when subjected to testing with cabernet sauvignon and tannat wines. These findings emphasize the sensing platform's potential for monitoring tannic acids in beverages and food products.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023. Published by Elsevier Ltd.)
Databáze: MEDLINE
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