Abstract − Analytical Sciences, 19(6), 953 (2003).
On-line Preconcentration System for Lead(II) Determination in Waste Water by Atomic Absorption Spectrometry Using Active Carbon Loaded with Pyrogallol Red
Ali A. ENSAFI, Taghi KHAYAMIAN, and Mohammad H. KARBASI
College of Chemistry, Isfahan University of Technology, Isfahan-84156, Iran
An on-line system for enrichment and determination of lead(II) is presented. It is based on the adsorption oflead(II) ions on a minicolumn packed with active carbon loaded with Pyrogallol Red. After preconcentration step, the metal ions are eluted automatically by 5.0 ml of 0.50 M nitric acid solution and the lead ion contents were determined by atomic absorption spectrometry. The influence of chemicals, pH and flow variables were studied as well as effect of potential interfering ions. Under the optimum conditions, the lead ions in aqueous samples were concentrated about 100 fold by the column. The detection limit was 0.001 µg ml-1. The recovery percent of spliced lead(II) was in the range of 98% - 103%.
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