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

• DOI: 10.1039/b409600b
• Publication Date: 2004-12-03T15:09:07Z
• Authors: Leonardo V. Vargas; Juergen Sand; Tiago A. S. Brandão; Haidi D. Fiedler; Frank H. Quina; Faruk Nome
• Keywords: Sodium dodecyl sulfate

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