Normal and Reverse Flow Injection- Spectrophotometric Determination of Vancomycin Hydrochloride in Pharmaceutical Preparations Using 2, 4-Dinitrophenylhydrazine. Iraqi Journal of Science. 2023;55(2B):623-633. Accessed March 8, 2025. https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/11742