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Journal of Chemistry
Volume 2013 (2013), Article ID 509341, 11 pages
Research Article

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

1Faculdade de Engenharia de Ilha Solteira, UNESP—Univ Estadual Paulista, Departamento de Física e Química, Avenida Brasil Centro 56, 15385-000 Ilha Solteira, SP, Brazil
2Instituto de Química de Araraquara, UNESP—Univ Estadual Paulista, Rua Francisco Degni 55, CEP 14800-900 Araraquara, SP, Brazil

Received 16 March 2013; Revised 24 April 2013; Accepted 12 May 2013

Academic Editor: Patricia Valentao

Copyright © 2013 Devaney Ribeiro Do Carmo et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


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.