“Continuous Flow Injection Analysis for The Photometric Determination of Metformin Drug Via The Release of Copper(II) ion from Charged Gel Bead Crystal”, Iraqi Journal of Science, vol. 54, no. 1, pp. 17–26, Dec. 2023, Accessed: May 20, 2024. [Online]. Available: https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/12014