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 : 16 | Download : 6

Publication Date : 0000-00-00

Article Type : Research Paper

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`-bisinsert ignore into journalissuearticles values(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 Pbinsert ignore into journalissuearticles values(II); and Zninsert ignore into journalissuearticles values(II);, respectively.
Keywords : Solid phase extraction, N, N` bis 4 methoxysalicylidene, 1, 3 propanediamine, modified silica gel, lead, zinc, FAAS