- Turkish Journal of Chemistry
- Vol: 40 Issue: 6
- Schiff base immobilized silica gel framework as an efficient sorbent for preconcentration of Pb and ...
Schiff base immobilized silica gel framework as an efficient sorbent for preconcentration of Pb and Zn ions in aqueous media
Authors : Murat Koluman, Feyzullah Tokay, Sema Bağdat
Pages : 953-964
View : 9 | Download : 4
Publication Date : 9999-12-31
Article Type : Makaleler
Abstract :A novel preconcentration method for Pb and Zn ions using a column packed with Schiff base modified silica gel is described. The method was based on the sorption of analytes on N,N'-bis(4-methoxysalicylidene)-1,3-propanediamine modified silica gel and elution with HNO$_{3}$ prior to flame atomic absorption analysis. The parameters pH, flow rate, sample volume, eluent volume, and concentration were optimized using a central composite design. The detection limits were 10.0 $\mu $g L$^{-1}$ for Pb and 1.1 $\mu $g L$^{-1}$ for Zn. The suggested procedure was validated with Lake Ontario water as a certified reference material and recovery percentages were 101.8% for Pb and 98.2% for Zn. The application of the method was performed on snow, tap, bottled, mineral, and lake water samples and recovery percentages were in the range of 96.7%-101.6% and 96.4%-98.4% for Pb(II) and Zn(II), respectively.Keywords : Solid phase extraction, N, N'-bis(4-methoxysalicylidene)-1, 3-propanediamine, modified silica gel, lead, zinc, FAAS