T. SULAIMAN, S.; A. HAMOUDI, T. Spectrophotometric Determination of Cobalt(II) with Mordant Blue 9 -Application to Vitamin B12 (Injections and Powder). Rafidain Journal of Science, [S. l.], v. 27, n. 2, p. 93–102, 2018. DOI: 10.33899/rjs.2018.145394. Disponível em: https://edusj.uomosul.edu.iq/index.php/rsci/article/view/47061. Acesso em: 10 sep. 2025.