“Spectrophotometric Determination of Co(II) in Vitamin B12 Using 2-(biphenyl-4-yl)-3-((2-(2,4-dinitrophenyl) hydrazono)methyl) imidazo [1,2-a]pyridine as Ligand by Flow Injection–Merging Zone Analysis” (2020) Al-Nahrain Journal of Science, 23(3), pp. 24–38. Available at: https://anjs.edu.iq/index.php/anjs/article/view/2309 (Accessed: 23 November 2024).