Solid phase extraction and flame atomic absorption spectrometric determination of trace amounts of cadmium and lead in water and biological samples using modified TiO2 nanoparticles
作者： Neda Baghban , Ali Mohammad Haji Shabani , Shayessteh Dadfarnia
DOI: 10.1080/03067319.2012.727811
关键词: Atomic absorption spectroscopy 、 Chemistry 、 Aqueous solution 、 Hydrochloric acid 、 Chromatography 、 Detection limit 、 Trace Amounts 、 Sorbent 、 Solid phase extraction 、 Cadmium
摘要: A solid phase extraction procedure for the separation and preconcentration of trace amounts Cd(II) Pb(II) using alizarin red S modified TiO2 nanoparticles prior to their determination by flame atomic absorption spectrometry has been proposed. The influences some analytical parameters such as pH, flow rates sample eluent, type concentration interfering ions on recovery sorbent were investigated. analytes quantitatively sorbed from aqueous solution at pH 5.5 onto a microcolumn packed with recovered 2.0 mL 1.5 mol L−1 hydrochloric acid. Under optimum experimental conditions, detection limits 0.11 0.30 ng mL−1 relative standard deviations ten replicate measurements 5.0 50.0 ng mL−1 2.1 1.9%, respectively. volume 200 mL resulted in factor 100. method was successfully applied ...
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