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http://dx.doi.org/10.5012/jkcs.2008.52.1.016

Preconcentration, Separation and Determination of lead(II) with Methyl Thymol Blue Adsorbed on Activated Carbon Using Flame Atomic Absorption Spectrometry  

Ensafi, Ali A. (College of Chemistry, Isfahan University of Technology)
Ghaderi , Ali R. (College of Chemistry, Isfahan University of Technology)
Publication Information
Journal of the Korean Chemical Society / v.52, no.1, 2008 , pp. 16-22 More about this Journal
Abstract
on-line system for preconcentration and separation of lead(II) is presented. The method is based on the complex formation of Pb(II) with adsorbed Methyl thymol blue on activated carbon. The conditions of preparing the solid phase reagent and of quantitative recovery of Pb(II) from diluted solutions, such as acidity of aqueous phase, solid phase capacity, and flow variables were studied as well as effect of potential interfering ions. After preconcentration step, the metal ions are eluted automatically by 5 ml of 0.5 M HNO3 solution and the lead ions content was determined by flame atomic absorption spectrometry. Under the optimum conditions, the lead ions in aqueous samples were separated and preconcentrated about 1000-fold by the column. The detection limit was 0.001 g mL-1. Lead has been determined in river and tap water samples, with recovery of 98 to 102%.
Keywords
Lead; Methyl Thymol Blue; On-Line Preconcentration; FAAS
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