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Type: Artigo de periódico
Title: The key role of copper complexes adsorbed on a chemically endcapped diamine bonded phase for HPLC
Author: Silva, CR
Jardim, ICSF
Airoldi, C
Abstract: Chromatographic silica (10 mum) was chemically modified with the organosilane [3-(2-aminoethyl)aminopropyl]trimethoxysilane (AEAPTS) and further endcapped with trimethylchlorosilane (TMCS). Copper ions were complexed onto the modified silica surface through pendant amine groups. The purpose of the immobilized copper complexes is to provide new sites in the stationary phase that can interact strongly with basic organic compounds. A conventional test mixture composed of dipolar compounds such as benzene, toluene, naphthalene, anthracene, pyrene, and nitrobenzene was used to evaluate these new columns. A second mixture, composed of aromatic amines, N,N-diethylaniline, and aniline, was chosen to evaluate the effects caused by complexation of copper ions on the modified silica.
Subject: bonded phases
functionalized silica
Country: Alemanha
Editor: Wiley-v C H Verlag Gmbh
Rights: fechado
Identifier DOI: 10.1002/1615-9314(20010301)24:3<197
Date Issue: 2001
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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