S. OTHMAN, N. Spectrophotometic Determination of some Sulphonamides in Aqueous Solution Via Azo- Dye Formation Reaction. Journal of Education and Science (JES), [S. l.], v. 17, n. 2, p. 32–40, 2005. DOI: 10.33899/edusj.2005.81308. Disponível em: https://ojs.uomosul.edu.iq/index.php/edusj/article/view/23648. Acesso em: 6 aug. 2025.