TITLE

Octadecylsilane-modified silicas in the adsorption of toluene

AUTHOR(S)
Brambilla, Rodrigo; Pinto, Carolina; Miranda, Márcia S. L.; Dos Santos, João H. Z.
PUB. DATE
August 2008
SOURCE
Analytical & Bioanalytical Chemistry;Aug2008, Vol. 391 Issue 7, p2673
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A series of octadecylsilane-modified silicas were prepared by sol-gel and grafting methods. Carbon contents and octadecyl chain conformations were shown to depend on the preparative route. Grafting engenders a low carbon content and a liquid-like chain conformation, while the sol-gel method affords a much higher carbon content and a crystalline conformation. The relationships between the toluene adsorption of the hybrid silicas and their chain conformations, their carbon contents and their textural characteristics are discussed. These sorbents, when used in combination with ultraviolet diffuse reflectance spectroscopy (UV DRS), can be employed as a rapid screening method for detection of aromatic compounds in water and air environmental matrices. [Figure not available: see fulltext.]
ACCESSION #
33372839

 

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