Electrochemical determination of tramadol using modified screen printed electrode: Original scientific paper. Journal of Electrochemical Science and Engineering, [S. l.], v. 12, n. 1, p. 127–135, 2021. DOI: 10.5599/jese.1141. Disponível em: https://pub.iapchem.org/ojs/index.php/JESE/article/view/1141. Acesso em: 9 jun. 2026.