CHAPLENKO, Alexander; MONOGAROVA, Oksana; OSKOLOK, Kirill. Colorimetry and Indirect X-ray Fluorescence Determination of Active Ingredients in Tetracycline Hydrochloride Drug and Injection Solution of B12 Vitamin Using of Polyurethane Foam Sorbents. Iraqi Journal of Pharmaceutical Sciences , Baghdad, Iraq, v. 26, n. 2, p. 7–11, 2017. DOI: 10.31351/vol26iss2pp7-11. Disponível em: https://bijps.uobaghdad.edu.iq/index.php/bijps/article/view/666.. Acesso em: 7 apr. 2025.