Affiliation: | 1. Departmant of Chemistry, Faculty of Science, Urmia University, Urmia, Iran. Research Department of Chromatography, Iranian Academic Center for Education, Culture & Research (ACECR), Urmia Branch, Urmia, Iran.;2. Research Department of Chromatography, Iranian Academic Center for Education, Culture & Research (ACECR), Urmia Branch, Urmia, Iran. |
Abstract: | A simple and selective solid phase extraction procedure for the trace analysis of iron(III) in water samples has been developed. Sodium dodecyl sulfate coated alumina, modified with polyphenolic compounds (extracted from black tea) was used for the extraction and preconcentration of iron(III) from water samples before determination by flame atomic absorption spectrometry. Due to the complexation reaction between iron(III) and polyphenol compounds, iron(III) was quantitatively extracted on the proposed sorbent and then eluted by 2.0 mL of HCl (1.0 mol/L). The effects of extraction parameters, such as pH and volume of sample solution, amount of polyphenolic compounds, type of eluting agent and the effect of interfering ions on the extraction of iron(III), were investigated. It was found that the proposed method had a good linear range (15.0–100.0 μg/L) and a low detection limit (10.0 μg/L). The procedure was successfully applied for iron determination in drinking water samples. |