ALI TAHER, Mohammad. Derivative Spectrophotometric Determination of Trace Manganese after Separation and Preconcentration with the Ion Pair of 2-(5-Bromo-2-pyridylazo)-5-diethylaminophenol and Ammonium Tetraphenylborate . Asian Journal of Chemistry, [S. l.], v. 14, n. 1, p. 107–116, 2010. Disponível em: https://asianpubs.org/index.php/ajchem/article/view/21959. Acesso em: 4 jul. 2024.