Development of an Extractive Spectrophotometric Method for the Determination of Copper(II) in Leafy Vegetable and Pharmaceutical Samples Using 2–acetylpyridine 4–phenyl –3-thiosemicarbazone (APPT). Momona Ethiopian Journal of Science (MEJS) , [S. l.], v. 4, n. 2, p. 70–83, 2024. Disponível em: https://journal.mu.edu.et/index.php/mejs/article/view/120.. Acesso em: 16 sep. 2024.