dc.contributor | Universidade Estadual de Campinas (UNICAMP) | |
dc.contributor | Universidade Federal de São Carlos (UFSCar) | |
dc.contributor | Universidade Estadual Paulista (Unesp) | |
dc.date.accessioned | 2021-06-25T10:22:38Z | |
dc.date.accessioned | 2022-12-19T22:10:08Z | |
dc.date.available | 2021-06-25T10:22:38Z | |
dc.date.available | 2022-12-19T22:10:08Z | |
dc.date.created | 2021-06-25T10:22:38Z | |
dc.date.issued | 2021-05-15 | |
dc.identifier | Talanta, v. 227. | |
dc.identifier | 0039-9140 | |
dc.identifier | http://hdl.handle.net/11449/205872 | |
dc.identifier | 10.1016/j.talanta.2021.122200 | |
dc.identifier | 2-s2.0-85100805022 | |
dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/5386469 | |
dc.description.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 (k0) 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. | |
dc.language | eng | |
dc.relation | Talanta | |
dc.source | Scopus | |
dc.subject | Composite material | |
dc.subject | Disposable sensor | |
dc.subject | Electrochemical sensor | |
dc.subject | Nail polish | |
dc.subject | Tartrazine | |
dc.title | Disposable and low-cost electrochemical sensor based on the colorless nail polish and graphite composite material for tartrazine detection | |
dc.type | Artículos de revistas | |