| Full text | |
| Author(s): |
de Lima, Lucas F.
[1]
;
Ferreira, Andre L.
[2]
;
Maciel, Cristiane C.
[3]
;
Ferreira, Marystela
[2]
;
de Araujo, William R.
[1]
Total Authors: 5
|
| Affiliation: | [1] State Univ Campinas UNICAMP, Inst Chem, Dept Analyt Chem, Portable Chem Sensors Lab, POB 6154, BR-13083970 Campinas, SP - Brazil
[2] Fed Univ Sao Carlos UFSCar, Ctr Sci & Technol Sustainabil CCTS, Sorocaba, SP - Brazil
[3] Sao Paulo State Univ Unesp, Inst Sci & Technol, BR-18087180 Sorocaba - Brazil
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | Talanta; v. 227, MAY 15 2021. |
| Web of Science Citations: | 1 |
| Abstract | |
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 x 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 x 10 (8) mol L (1) with a linear concentration ranging from 2.0 to 50.0 mu mol 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. (AU) | |
| FAPESP's process: | 19/02692-3 - DEVELOPMENT AN OPTICAL BIOSSENSOR BY SURFACE PLASMONIC RESONANCE (SPR) TECHNIQUE FOR THE DETERMINATION OF CREATINE KINASE (CK-MB) |
| Grantee: | André Lopes Ferreira |
| Support Opportunities: | Scholarships in Brazil - Scientific Initiation |
| FAPESP's process: | 18/08782-1 - Miniaturized and integrated chemical sensors: new fabrication platforms for biological, clinical and environmental applications |
| Grantee: | Mauro Bertotti |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 18/04061-8 - LAYER BY LAYER FILMS OF POLYPYRROL AND MAGNETITE NANOPARTICLES IN THE ANALYTICAL DETERMINATION OF PARABENS |
| Grantee: | Lucas Felipe de Lima |
| Support Opportunities: | Scholarships in Brazil - Master |