A new Spectrophotometric Method For The Determination of La (III) With 3-Hydroxy -4-(2-hydroxyPhenyl azo) Naphthalene -1- Sulfonic Acid. Ibn AL-Haitham Journal For Pure and Applied Sciences, [S. l.], v. 24, n. 1, 2016. Disponível em: https://jih.uobaghdad.edu.iq/index.php/j/article/view/869.. Acesso em: 21 may. 2024.