ZHANG, D.; ZHANG, W.J.; HOU, P. Determination of Trace Heavy Metal Ions by Flame Atomic Absorption Spectrometry after Preconcentration with Manual-Controlled Injection Nano-Calcium Titanate Enricher. Asian Journal of Chemistry, [S. l.], v. 23, n. 11, p. 4851–4854, 2011. Disponível em: https://asianpubs.org/index.php/ajchem/article/view/10996. Acesso em: 23 jul. 2024.