A New Spectrophotometric Determination of Chromium (VI) As Cr2O72- After Cloud-Point Extraction using a Laboratory-Made Organic Reagent. Global Journal of Science Frontier Research, [S. l.], v. 13, n. 50, p. 9–19, 2013. Disponível em: https://journalofscience.org/index.php/GJSFR/article/view/103288. Acesso em: 23 oct. 2026.