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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Surface molecularly imprinted core-shell nanoparticles and reflectance spectroscopy for direct determination of tartrazine in soft drinks

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Ruiz-Cordova, Gerson A. [1, 2] ; Villa, Javier E. L. [1] ; Khan, Sabir [1] ; Picasso, Gino [2] ; Sotomayor, Maria Del Pilar Taboada [1, 3]
Total Authors: 5
[1] Sao Paulo State Univ UNESP, Inst Chem, Dept Analyt Chem, BR-14801970 Araraquara, SP - Brazil
[2] Natl Univ Engn, Fac Sci, Lab Phys Chem Res, Av Tupac Amaru 210 Rimac, Lima - Peru
[3] Natl Inst Alternat Technol Detect Toxicol Evaluat, Araraquara, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Analytica Chimica Acta; v. 1159, MAY 15 2021.
Web of Science Citations: 0

The present work shows the synergistic application of reflectance spectroscopy and core-shell molecularly imprinted polymer (MIP) for rapid quantification of tartrazine in soft drinks. Studies evaluated the performance of the MIPs synthesized in the presence of silica nanoparticles unfunctionalized and functionalized with {[}3-(methacryloyloxy)propyl]trimethoxysilane. Although the use of functionalized silica nanoparticles promoted the highest adsorption capability of tartrazine, the material was found to be less selective when it was applied in real samples. Interestingly, the most accurate results were obtained via the application of the MIP synthesized in the presence of unfunctionalized silica nanoparticles (SiO2@MIP). The optimized core-shell MIP was also characterized by Raman spectroscopy and scanning electron microscopy. The use of direct reflectance spectroscopy in the analyte detection strategy after the template extraction from the MIPs resulted in faster and more accurate results than conventional UV -Visible spectroscopy. With regard to the analysis of the soft drink samples, no significant differences were found between the results obtained from the proposed reflectance spectroscopy-based technique and those obtained from the comparative high-performance liquid chromatography technique. Under optimized conditions, this method displayed a linear range of 1.0-12.5 mmol L-1 with LOD and LOQ values of 0.303 and 1.0 mmol L-1, respectively. The selectivity factor (b) ranged between 1.4 up to 264 showed better recognition of tartrazine in front of other dyes. Based on the results obtained, the proposed method is found to be suitable for rapid determination of tartrazine in food samples with complex matrices without the need of applying tedious sample preparation and cost-demanding instruments. (c) 2021 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 14/50945-4 - INCT 2014: National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactivies
Grantee:Maria Valnice Boldrin
Support type: Research Projects - Thematic Grants
FAPESP's process: 17/24196-2 - Development of ultrasensitive and selective spectrochemical sensors for the determination of hormones in environmental samples and biological fluids
Grantee:Javier Erick Lobatón Villa
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 19/00677-7 - RADes-MIP - preparation and synthesis of materials for development of rapid analysis devices for monitoring emerging pollutants using highly selective biomimetic polymers based on molecular printing technology
Grantee:Maria Del Pilar Taboada Sotomayor
Support type: Regular Research Grants