Issue 2, 2005
From the journal:

Analyst

Determination of environmentally important metal ions by fluorescence quenching in anionic micellar solution

Leonardo V. Vargas,a   Juergen Sand,a   Tiago A. S. Brandão,a   Haidi D. Fiedler,*a   Frank H. Quinab  and  Faruk Nomea  

* Corresponding authors

a Departamento de Química, Universidade Federal de Santa Catarina, CEP 88040-900, Florianópolis, SC, Brazil
E-mail: fiedler@qmc.ufsc.br
Fax: 55 48 331 9711
Tel: 55 48 331 9230

b Instituto de Química, Universidade de São Paulo, CP 26077, CEP 05513-970, São Paulo, SP, Brazil

Abstract

This work describes the effect of a variety of metal ions as quenchers of the fluorescence of naphthalene, in aqueous micellar solutions of sodium dodecyl sulfate (SDS). The quenching by the metal ions can be adequately described by the Stern–Volmer equation and the best signal to noise ratios are obtained with low micellized detergent concentrations. Apparent Stern–Volmer constants decrease in the order: Fe3+ > Cu2+ > Pb2+ > Cr3+ > Ni2+ and directly reflect the relative sensitivity of the method for these ions. Detection limits (defined as three times the standard deviation of the blank for n = 10) for the fluorescence quenching of naphthalene by the metal ions in aqueous micellar SDS are in the range of 1.0 × 10−6 to 1.0 × 10−5 mol dm−3. The proposed fluorescence quenching method shows good repeatibility for a variety of added quencher metal ions, indicating that anionic micelle-enhanced fluorescence quenching by metal ions constitutes an analytical method of rather general application.

Graphical abstract: Determination of environmentally important metal ions by fluorescence quenching in anionic micellar solution

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Article information

DOI
https://doi.org/10.1039/B409600B
Article type
Paper
Submitted
24 Jun 2004
Accepted
03 Nov 2004
First published
03 Dec 2004

Analyst, 2005,130, 242-246

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Determination of environmentally important metal ions by fluorescence quenching in anionic micellar solution

L. V. Vargas, J. Sand, T. A. S. Brandão, H. D. Fiedler, F. H. Quina and F. Nome, Analyst, 2005, 130, 242 DOI: 10.1039/B409600B

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