Determination of Copper in Different Ethanolic Matrices Using a Chloropropyl Silica Gel Modified with a Nanostructured Cubic Octa(3-aminopropyl)octasilsesquioxane

• Published in: Journal of chemistry Vol. 2013; no. 1
• Main Authors: Do Carmo, Devaney Ribeiro, De Oliveira Bicalho, Urquisa, a Silveira, Tayla Fernanda, Filho, Newton Luiz Dias, Lataro Paim, Leonardo
• Format: Journal Article
• Language: English
• Published: Hindawi Publishing Corporation 01-01-2013; Hindawi Limited
• ISSN: 2090-9063; 2090-9071
• DOI: 10.1155/2013/509341

The chloropropyl silica gel was modified with octa(3-aminopropyl)octasilsesquioxane and characterized by Fourier transform infrared (FTIR) spectroscopy, nuclear magnetic resonance (NMR), spectroscopies, and surface and area porosity. The specific sorption capacity of metallic ions (Cu2+ and Ni2+) increases in the following solvent order: water < ethanol 42% < ethanol < ketone. The high values of the constant (K) in the order of 103 L mol−1 suggested the high adsorbent capacity of the modified silica (SGAPC) for Cu2+ and Ni2+. SGAPC was applied to a separation column and shows recoveries of around 100% of copper in samples of sugar cane spirit, vodka, ginger brandy, and ethanol fuel.