NiFe₂O₄/(S,N)-doped graphene oxide composite as efficient electrochemical sensor for determination of sibutramine in dietary supplements: Original scientific paper. Journal of Electrochemical Science and Engineering, [S. l.], v. 16, 2026. DOI: 10.5599/jese.3318. Disponível em: https://pub.iapchem.org/ojs/index.php/JESE/article/view/3318. Acesso em: 27 jul. 2026.