| Texto completo | |
| Autor(es): |
Boane, Anastacio A.
;
Araujo, Diele A. G.
;
Munoz, Rodrigo A. A.
;
Paixao, Thiago R. L. C.
;
Richter, Eduardo M.
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Journal of the Electrochemical Society; v. 172, n. 2, p. 8-pg., 2025-02-01. |
| Resumo | |
A simple, low-cost, and lab-made carbon-based electrode was developed for the fast and selective determination of sulfamethoxazole (SMX) in milk samples, requiring only minimal sample preparation (dilution in supporting electrolyte). A custom-made conductive ink (composed of glass varnish, graphite, acetone) was applied to a plastic surface to fabricate a flow-through amperometric sensor integrated into a portable Batch Injection Analysis (BIA) system. This method enhanced selectivity and reduced electrode contamination. The optimized pulsed amperometric waveform conditions included two detection pulses (+1.0 V and +1.3 V) and two cleaning pulses (+1.5 V and -1.5 V), resulting in a linear response from 1.0 to 20.0 mu mol L-1, with a detection limit of 0.31 mu mol L-1. The stability and reproducibility of the method were confirmed, exhibiting low relative standard deviations (RSD <= 8.3%). The system exhibited excellent recovery for spiked milk samples at concentrations of 5.0 mu mol L-1 (68 +/- 7%), 10.0 mu mol L-1 (103 +/- 7%), and 20.0 mu mol L-1 (115 +/- 7%), demonstrating high accuracy and minimal matrix interference. This approach offers a rapid, accurate, and reliable method for the analysis of complex samples, particularly for onsite detection of SMX in milk. Low-cost and and lab-made disposable carbon-based sensors for complex sample analysis.Portable amperometric method for selective determination of sulfamethoxazole in milk samples.Simple and rapid sample preparation step (dilution in supporting electrolyte). (AU) | |
| Processo FAPESP: | 22/01810-5 - Plataformas microfluídicas fabricadas com fios têxteis e impressão 3d para eletroanálises de amostras clínicas, ambiental e biológicas |
| Beneficiário: | Diele Aparecida Gouveia Araújo |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 23/00246-1 - Dispositivos miniaturizados visando à produção em larga escala: fabricação, caracterização e aplicações in-situ |
| Beneficiário: | Mauro Bertotti |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 18/08782-1 - Sensores químicos miniaturizados e integrados: novas plataformas de fabricação para aplicações biológicas, clínicas e ambientais |
| Beneficiário: | Mauro Bertotti |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |