Izvorni znanstveni članak
https://doi.org/10.5599/jese.3168
Validation of a low-cost carbon screen-printed electrode platform: a statistical approach
Juliene Morais de Faria
; Departamento de Química. Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto. Universidade de São Paulo (DQ/FFCLRP/USP), Avenida Bandeirantes, 3900, Bairro Monte Alegre, Ribeirão Preto - SP, CEP 14040-901, Brazil
Thomaz Henrique da Cunha Reis
; Faculdade de Direito de Ribeirão Preto - Universidade de São Paulo (FDRP/USP), Avenida Bandeirantes, 3900, Bairro Monte Alegre, Ribeirão Preto - SP, CEP 14040-901, Brazil
Larissa Silva de Azevedo
; Instituto de Química de São Carlos, Universidade de São Paulo (IQSC/USP), Avenida Trabalhador São Carlense, 400, Parque Arnold Schimidt, São Carlos - SP, CEP 14040-901, Brazil
Caio Henrique Pinke Rodrigues
; Departamento de Química. Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto. Universidade de São Paulo (DQ/FFCLRP/USP), Avenida Bandeirantes, 3900, Bairro Monte Alegre, Ribeirão Preto - SP, CEP 14040-901, Brazil
Aline Thaís Bruni
; Departamento de Química. Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto. Universidade de São Paulo (DQ/FFCLRP/USP), Avenida Bandeirantes, 3900, Bairro Monte Alegre, Ribeirão Preto - SP, CEP 14040-901, Brazil
Marcelo Firmino de Oliveira
; Departamento de Química. Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto. Universidade de São Paulo (DQ/FFCLRP/USP), Avenida Bandeirantes, 3900, Bairro Monte Alegre, Ribeirão Preto - SP, CEP 14040-901, Brazil
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* Dopisni autor.
Sažetak
Electrochemical sensors have gained increasing attention for their high selectivity and sensitivity. Screen-printed electrodes (SPEs) are particularly attractive as low-cost, disposable, and scalable platforms that enable miniaturized electrochemical cells and field-deployable measurements. Here, we report a low-cost and easily fabricated carbon paste -SPE platform consisting of a 3D-printed acrylonitrile butadiene styrene body filled with carbon paste (graphite/mineral oil, 70:30) and a silver-ink pseudo-reference electrode. The device was evaluated using potassium ferricyanide (5.0 mmol L-1 in 0.5 mol L-1 KCl) as a redox probe. The ipa/ipc ratio was close to unity, while the peak-to-peak separation (ΔEp≈949 mV) indicated kinetic/ohmic contributions typical of composite carbon-based printed electrodes. A linear relationship between the corrected anodic peak current (iap) and the square root of the scan rate (v1/2) yielded an electroactive area of 0.485 cm², substantially larger than the geometric area, consistent with surface heterogeneity/porosity. Statistical validation by ANOVA confirmed good repeatability and reproducibility (p > 0.05, 95 % confidence). Overall, the proposed CP-SPE provides a robust and reproducible low-cost platform with strong potential for voltammetric sensing applications.
Ključne riječi
Electrochemical Sensors; voltammetry; electrochemical validation; statistical techniques; repeatability; reproducibility
Hrčak ID:
346198
URI
Datum izdavanja:
10.4.2026.
Posjeta: 71 *