Nano Fe3O4–graphite paste modified electrochemical sensor for phosphatic pesticide -chlorpyrifos. Momona Ethiopian Journal of Science (MEJS) , [S. l.], v. 9, n. 1, p. 76–89, 2024. Disponível em: https://journal.mu.edu.et/index.php/mejs/article/view/215.. Acesso em: 16 sep. 2024.