Determination of copper (II) by simple extraction procedure prior to differential pulse polarography using 4-(2-hydroxy phenyl ethaminodiol),benzene-. Global Journal of Science Frontier Research, [S. l.], v. 10, n. 2, p. -, 2010. Disponível em: https://www.journalofscience.org/index.php/GJSFR/article/view/100004. Acesso em: 6 feb. 2026.