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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.)

Preconcentration and determination of Cu(II) in a fresh water sample using modified silica gel as a solid-phase extraction adsorbent

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Author(s):
Pereira, A. S. [1] ; Ferreira, G. [1] ; Caetano, L. [1] ; Martines, M. A. U. [2] ; Padilha, P. M. [3] ; Santos, A. [4] ; Castro, G. R. [1]
Total Authors: 7
Affiliation:
[1] Univ Estadual Paulista, Fac Engn Ilha Solteira, Dept Quim & Fis, BR-15385000 Ilha Solteira, SP - Brazil
[2] Univ Fed Mato Grosso do Sul, Dept Quim, BR-79070900 Campo Grande, MS - Brazil
[3] UNESP, IB, Dept Quim & Bioquim, BR-18618000 Botucatu, SP - Brazil
[4] UNESP, IQ, Dept Quim Analit, BR-14800900 Araraquara, SP - Brazil
Total Affiliations: 4
Document type: Journal article
Source: JOURNAL OF HAZARDOUS MATERIALS; v. 175, n. 1-3, p. 399-403, MAR 15 2010.
Web of Science Citations: 54
Abstract

A method was developed to attach 4-amino-2-mercaptopyrimidine (AMP) onto silica gel surface and to determine trace metals. The Surface functionalization reaction was performed with a silylant agent, chloropropyltrimethoxysilane (Si-CPTS), and the product, Si-AMP, was characterized by FT-IR and elemental analysis to evaluate the Surface modification. The functionalized silica was applied in the sorption of Cu(II) ions from an aqueous medium. The series of adsorption isotherms were adjusted to a modified Langmuir equation and the maximum number of moles of adsorbed copper was 0.447 mmol g(-1). The modified material was placed in a preconcentration system, where it reached ail approximately 20-fold enrichment factor using 5 mg of Si-AMP. The proposed method was applied in the preconcentration and determination of Cu(II) in a fresh water sample from the Parana river and was validated through a comparative analysis of a standard reference material (1643 e). (C) 2009 Elsevier B.V. All rights reserved. (AU)