3D-printed electrodes using graphite/carbon nitride/polylactic acid composite material: A greener platform for detection of amaranth dye in food samples.

Autor: de Faria LV; Departamento de Química Analítica, Instituto de Química, Universidade Federal Fluminense, 24020-141 Niterói-RJ, Brazil. Electronic address: viniciuslucas82@yahoo.com.br., Villafuerte LM; Departamento de Química Analítica, Instituto de Química, Universidade Federal Fluminense, 24020-141 Niterói-RJ, Brazil., do Nascimento SFL; Departamento de Química Analítica, Instituto de Química, Universidade Federal Fluminense, 24020-141 Niterói-RJ, Brazil., de Sá IC; Departamento de Química Analítica, Instituto de Química, Universidade Federal Fluminense, 24020-141 Niterói-RJ, Brazil., Peixoto DA; Instituto de Química, Universidade Federal de Uberlândia, 38408-100 Uberlândia-MG, Brazil., Ribeiro RSA; Departamento de Química Analítica, Instituto de Química, Universidade Federal Fluminense, 24020-141 Niterói-RJ, Brazil., Nossol E; Instituto de Química, Universidade Federal de Uberlândia, 38408-100 Uberlândia-MG, Brazil., Lima TM; Departamento de Química Analítica, Instituto de Química, Universidade Federal Fluminense, 24020-141 Niterói-RJ, Brazil., Semaan FS; Departamento de Química Analítica, Instituto de Química, Universidade Federal Fluminense, 24020-141 Niterói-RJ, Brazil., Pacheco WF; Departamento de Química Analítica, Instituto de Química, Universidade Federal Fluminense, 24020-141 Niterói-RJ, Brazil., Dornellas RM; Departamento de Química Analítica, Instituto de Química, Universidade Federal Fluminense, 24020-141 Niterói-RJ, Brazil. Electronic address: rafaeldornellas@id.uff.br.
Jazyk: angličtina
Zdroj: Food chemistry [Food Chem] 2024 Jun 01; Vol. 442, pp. 138497. Date of Electronic Publication: 2024 Jan 18.
DOI: 10.1016/j.foodchem.2024.138497
Abstrakt: The production of sustainable materials with properties aimed at the additive manufacturing of electrochemical sensors has gained prestige in the scientific scenario. Here, a novel lab-made composite material using graphite (G) and carbon nitride (C 3 N 4 ) embedded into polylactic acid (PLA) biopolymer is proposed to produce 3D-printed electrodes. PLA offers printability and mechanical stability in this composition, while G and C 3 N 4 provide electrical properties and electrocatalytic sites, respectively. Characterizations by Raman and infrared spectroscopies and Energy Dispersive X-rays indicated that the G/C 3 N 4 /PLA composite was successfully obtained, while electron microscopy images revealed non-homogeneous rough surfaces. Better electrochemical properties were achieved when the G/C 3 N 4 /PLA proportion (35:5:60) was used. As a proof of concept, amaranth (AMR), a synthetic dye, was selected as an analyte, and a fast method using square wave voltammetry was developed. Utilizing the 3D-printed G/C 3 N 4 /PLA electrode, a more comprehensive linear range (0.2 to 4.2 μmol/L), a 5-fold increase in sensitivity (9.83 μmol -1 L μA), and better limits of detection (LOD = 0.06 μmol/L) and quantification (LOQ = 0.18 μmol/L) were achieved compared to the G/PLA electrode. Samples of jelly, popsicles, isotonic drinks, and food flavoring samples were analyzed, and similar results to those obtained by UV-vis spectrometry confirmed the method's reliability. Therefore, the described sensor is a simple, cost-effective alternative for assessing AMR in routine food analysis.
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 © 2024 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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