Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/64706
Type: Artigo de periódico
Title: EMPLOY OF SILICA GEL ORGANICALLY MODIFIED AND IONICALLY IMPRINTED FOR SELECTIVE ON-LINE PRECONCENTRATION OF COPPER IONS
Author: de Avila, TC
Segatelli, MG
Beijo, LA
Tarley, CRT
Abstract: EMPLOY OF SILICA GEL ORGANICALLY MODIFIED AND IONICALLY IMPRINTED FOR SELECTIVE ON-LINE PRECONCENTRATION OF COPPER IONS. The present work purposes the preparation of a silica gel sorbent organically modified with 2-aminoethyl-3-aminobutylmethyldimethoxysilane (AAMDMS) and imprinted with Cu(2+) ions by means surface imprinting technique and its use for selective on-line sorbent preconcentration of Cull ions with further UV-VIS spectrophotometric determination by flow injection analysis. The Cu(2+)-imprinted silica gel, when compared with non imprinted silica gel and silica gel, showed from the binary mixture Of Cu(2+)/Ni(2+) relative selectivity coefficient (k') of 6.84 and 5.43 and 6.64 and 19.83 for the mixture Cu(2+)/Pb(2+), thus demonstrating higher selectivity of Cu(2+)-imprinted silica gel towards Cull ions. Under optimized condition, the on-fine preconcentration method provided detection limit of 3.4 mu g L(-1) and linear range ranging from 30.0 up to 300.0 mu g L(-1) (r = 0.995). The accuracy of method was successfully assessed by analyzing different kind of spiked water samples with recovery values ranging from 92.2 up to 103.0%.
Subject: imprinted silica gel
spectrophotometry
copper
Country: Brasil
Editor: Soc Brasileira Quimica
Rights: aberto
Date Issue: 2010
Appears in Collections:Unicamp - Artigos e Outros Documentos

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