Email updates

Keep up to date with the latest news and content from Chemistry Central Journal and Chemistry Central.

Open Access Highly Accessed Research article

Salicylic acid functionalized silica-coated magnetite nanoparticles for solid phase extraction and preconcentration of some heavy metal ions from various real samples

M Reza Shishehbore1*, Abbas Afkhami2 and Hasan Bagheri3

Author Affiliations

1 Department of Chemistry, Yazd Branch, Islamic Azad University, Yazd, Iran

2 Faculty of Chemistry, Bu-Ali Sina University, Hamedan, Iran

3 Department of Chemistry, Takestan Branch, Islamic Azad University, Takestan, Iran

For all author emails, please log on.

Chemistry Central Journal 2011, 5:41  doi:10.1186/1752-153X-5-41

Published: 15 July 2011

Abstract

A method for the preconcentration of trace heavy metal ions in environmental samples has been reported. The presented method is based on the sorption of Cu(II), Cd(II), Ni(II) and Cr(III) ions with salicylic acid as respective chelate on silica-coated magnetite nanoparticles. Prepared adsorbent was characterized by XRD, SEM, BET and FT-IR measurements. The metals content of the sorbed complexes are eluted using 4.0 mL of 1.0 mol L-1 nitric acid. The influences of the analytical parameters including pH, amount of solid phase and condition of eluting solution, the effects of matrix ions on the retention of the analytes were examined. The accuracy and precision of suggested method were tested by analyzing of certified reference materials. The detection limits (3Sb/m, N = 8) for Cu(II), Cd(II), Ni(II) and Cr(III) ions are 0.22, 0.11, 0.27 and 0.15 μg L-1, respectively, and the maximum preconcentration factor is 200. The method was successfully applied to the evaluation of these trace and toxic metals in various waters, foods and other samples.

Graphical abstract