| Texto completo | |
| Autor(es): |
Camargo, Jessica
;
Crapnell, Robert D.
;
Bernalte, Elena
;
Janegitz, Bruno C.
;
Banks, Craig E.
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | ACS APPLIED ELECTRONIC MATERIALS; v. 7, n. 12, p. 12-pg., 2025-06-04. |
| Resumo | |
The development of versatile, cost-effective, and reproducible electrochemical sensors has gained importance due to their adaptability to specific applications through variations in composition and design. Water-based conductive inks have emerged as environmentally friendly alternatives to meet sustainability requirements and eliminate hazardous solvents. In this study, a screen-printed electrode (SPE) sensor utilizing a water-based conductive ink composed of Carbon Black Super P (CBSP), poly(vinylpyrrolidone) (PVP) and chitosan is presented. The ink formulation was optimized for a 5% CBSP composition, resulting in a homogeneous surface and superior reproducibility with a relative standard deviation of 7.99% (n = 5). The optimized sensor exhibited quasi-reversible behavior in cyclic voltammetry and an electroactive area 198.57% larger than its geometric area. The analytical performance for tryptophan detection showed a linear range from 0.5 to 300 mu mol L-1 (R 2 = 0.9946), a limit of detection of 0.018 mu mol L-1, and interference rates below 10% for common compounds. The recovery rates for pharmaceutical and beverage samples ranged from 86.2% to 114%. The sustainable design, excellent sensitivity, and cost-effective manufacturing make this SPE sensor a robust tool for point-of-use tryptophan quantification. (AU) | |
| Processo FAPESP: | 23/06793-4 - Desenvolvimento de sistemas eletroquímicos multiplex aplicados para detecção de biomarcadores relacionados a doenças cardiovasculares |
| Beneficiário: | Bruno Campos Janegitz |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 23/00321-3 - Eletrodos de carbono serigrafados para detecção de compostos clínicos e farmacêuticos |
| Beneficiário: | Jéssica Rocha Camargo |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Doutorado Direto |
| Processo FAPESP: | 19/23177-0 - Desenvolvimento de dispositivos descartáveis com tintas condutoras e substratos de baixo custo para o biossensoriamento de disfunções hormonais e detecção de Malária |
| Beneficiário: | Jéssica Rocha Camargo |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado Direto |