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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Author(s):
Do Carmo, Devaney Ribeiro [1] ; Bicalho, Urquisa De Oliveira [1] ; Silveira, Tayla Fernanda A. [1] ; Dias Filho, Newton Luiz [1] ; Paim, Leonardo Lataro [2]
Total Authors: 5
Affiliation:
[1] Univ Estadual Paulista, UNESP, Dept Quim & Fis, Fac Engn Ilha Solteira, BR-15385000 Ilha Solteira, SP - Brazil
[2] Univ Estadual Paulista, UNESP, Inst Quim Araraquara, BR-14800900 Araraquara, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: JOURNAL OF CHEMISTRY; 2013.
Web of Science Citations: 0
Abstract

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 10(3) 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. (AU)