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Tytuł pozycji:

Disposable and low-cost electrochemical sensor based on the colorless nail polish and graphite composite material for tartrazine detection.

Tytuł :
Disposable and low-cost electrochemical sensor based on the colorless nail polish and graphite composite material for tartrazine detection.
Autorzy :
de Lima LF; Portable Chemical Sensors Lab, Department of Analytical Chemistry, Institute of Chemistry, State University of Campinas - UNICAMP, P.O. Box 6154, 13083-970, Campinas, SP, Brazil.
Ferreira AL; Center of Science and Technology for Sustainability (CCTS), Federal University of São Carlos (UFSCar), Sorocaba, SP, Brazil.
Maciel CC; Institute of Science and Technology, São Paulo State University (UNESP), 18087-180, Sorocaba, Brazil.
Ferreira M; Center of Science and Technology for Sustainability (CCTS), Federal University of São Carlos (UFSCar), Sorocaba, SP, Brazil.
de Araujo WR; Portable Chemical Sensors Lab, Department of Analytical Chemistry, Institute of Chemistry, State University of Campinas - UNICAMP, P.O. Box 6154, 13083-970, Campinas, SP, Brazil. Electronic address: .
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Źródło :
Talanta [Talanta] 2021 May 15; Vol. 227, pp. 122200. Date of Electronic Publication: 2021 Feb 09.
Typ publikacji :
Journal Article
Język :
English
Imprint Name(s) :
Publication: Amsterdam : Elsevier
Original Publication: Oxford : Pergamon Press
MeSH Terms :
Graphite*
Electrochemical Techniques ; Electrodes ; Limit of Detection ; Poland ; Tartrazine
Contributed Indexing :
Keywords: Composite material; Disposable sensor; Electrochemical sensor; Nail polish; Tartrazine
Substance Nomenclature :
7782-42-5 (Graphite)
I753WB2F1M (Tartrazine)
Entry Date(s) :
Date Created: 20210314 Date Completed: 20210514 Latest Revision: 20210514
Update Code :
20210515
DOI :
10.1016/j.talanta.2021.122200
PMID :
33714472
Czasopismo naukowe
A new method to manufacture electrochemical devices based on the graphite and colorless nail polish (N-grap) film was developed for tartrazine (Tz) detection. Scanning Electron Microscopy (SEM) demonstrates that the composite material presents a high porous carbon structure. Cyclic voltammetry (CV) and Electrochemical Impedance Spectroscopy (EIS) were employed to electrochemically characterize the electrode material, which corroborates the porous structure of the N-graph due to the enhanced electroactive area (5.4-fold increase) and presented a heterogeneous electron transfer rate constant (k 0 ) of 5.82 × 10 -3  cm s -1 for potassium ferricyanide. The electrochemical determination of the Tz was carried out using square-wave voltammetry (SWV), under the optimized experimental conditions, which showed high sensitivity (0.793 A L mol -1 ) and a lower limit of detection (LOD) of 2.10 × 10 -8  mol L -1 with a linear concentration ranging from 2.0 to 50.0 μmol L -1 . The developed sensor was applied for the analysis of Tz in sports drink samples and the result obtained by N-grap device was statistically compared with a spectrophotometric method demonstrating good accordance and the accuracy of the proposed method. Based on these results, we believe that this new fabrication method to produce disposable and low-cost electrochemical devices can be an alternative method for in-field analysis of dye in commercial sport drink samples and other relevant applications.
(Copyright © 2021 Elsevier B.V. All rights reserved.)

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