Electrochemical sensing platform with gold nanoparticles capped by PDDA for benzyl alcohol determination
EntityUAM. Departamento de Química Analítica y Análisis Instrumental
10.1007/s00604-023-05690-6Microchimica Acta 190 (2023): 115
ISSN0026-3672 (print); 1436-5073 (online)
Funded byOpen Access funding provided thanks to the CRUE-CSIC agreement with Springer Nature
SubjectsBenzyl alcohol; Central composite design; Electrochemical sensor; Gold nanoparticles; Linear sweep voltammetry; Response surface methodology; Química
Rights© The Author(s) 2023
Esta obra está bajo una Licencia Creative Commons Atribución 4.0 Internacional.
An electrochemical sensor has been developed, by modifying screen-printed carbon devices (SPCE) with photochemically synthesized gold nanoparticles (AuNP), to determine benzyl alcohol, a preservative widely used in the cosmetic industry. To obtain the AuNP with the best properties for electrochemical sensing applications, the photochemical synthesis was optimized using chemometric tools. A response surface methodology based on central composite design was used to optimize the synthesis conditions, as irradiation time, and the concentrations of metal precursor and the capping/reducing agent (poly(diallyldimethylammonium) chloride, PDDA). The anodic current of benzyl alcohol on SPCE modified with the AuNP was used as response of the system. The best electrochemical responses were obtained using the AuNP generated by irradiating for 18 min a 7.20 × 10−4 mol L−1 AuCl4−-1.7% PDDA solution. The AuNP were characterized by transmission electron microscopy, cyclic voltammetry and dynamic light scattering. The nanocomposite-based sensor formed by the optimal AuNP (AuNP@PDDA/SPCE) was used to determine benzyl alcohol by linear sweep voltammetry in 0.10 mol L−1 KOH. The anodic current at + 0.017 ± 0.003 V (vs. AgCl) was used as analytical signal. Detection limit obtained under these conditions was 2.8 µg mL−1. The AuNP@PDDA/SPCE was applied to determine benzyl alcohol in cosmetic samples
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Google Scholar:Abad Gil, Lucía - Gismera García, María Jesús - Sevilla Escribano, M. Teresa - Rodríguez Procopio, Jesús
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