Journal of Analytical & Bioanalytical Techniques
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In present study, separation and preconcentration followed by solid phase extraction of trace amounts of some heavy metal ions,
Cd(II), Cu(II), Ni(II), Pb(II) and Zn(II) using a multiwalled carbon nanotubes (MWNTs) modified with complexing reagent
quinalizarin [1,2,5,8-tetrahydroxyanthracene-9,10-dione] were investigated. The analytes were quantitatively recovered at pH
6.0. The effects of the experimental parameters, including pH of the solutions, amounts of MWNTs, amounts of complexing
reagent, eluent type and volume, sample volume, flow rates of solution and matrix ions, were examined for the optimum
recoveries of the analyte ions. Tests of addition/recovery for analyte ions in real samples were performed with satisfactorily
results. The preconcentration factor was 100. Detection limit (3s) obtained for the investigated metals in the optimal conditions
were observed in the range of 0.30?0.65 μg L
. The new enrichment procedure was successfully applied to the determination of
these ions in food, water and environmental samples with satisfactory results.
Ayman A. Gouda has completed his Ph.D. at the age of 30 years from Zagazig University, Egypt and work now as Assistant Professor of Analytical
Chemistry in Makkah Community College, Umm AL-Qura University, Makkah, Saudi Arabia. He has published more than 35 papers in reputed journals.
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