Chaplenko A, Monogarova O, Oskolok K. 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 [Internet]. 2017 Dec. 25 [cited 2024 Nov. 5];26(2):7-11. Available from: https://bijps.uobaghdad.edu.iq/index.php/bijps/article/view/666