期刊
MICROCHIMICA ACTA
卷 165, 期 3-4, 页码 367-372出版社
SPRINGER WIEN
DOI: 10.1007/s00604-009-0146-2
关键词
Pb(II) ion-imprinted mesoporous sorbent; Selective solid-phase extraction; Preconcentration; Surface imprinting technique; Sol-gel process
资金
- Shanghai Leading Academic Discipline [B604]
A novel Pb(II) ion-imprinted mesoporous sorbent (IIMS) was synthesized by a surface imprinting technique combined with a sol-gel process and characterized by FT-IR and N-2 adsorption-desorption. Compared to the non-imprinted mesoporous sorbent (NIMS), the IIMS had a higher adsorption capacity and selectivity for Pb(II). The maximum static adsorption capacities of the IIMS and NIMS for Pb(II) were 221 and 173 mg g(-1), respectively. The relative selectivity coefficients of the sorbent for Pb(II) in the presence of Cd(II), Cu(II) and Zn(II) were 3.7, 1.9 and 3.4, respectively. Furthermore, the IIMS possessed a fast kinetics for Pb(II) sorption from aqueous solution with saturation time of < 20 min, and could be used repeatedly. The detection limit (3 sigma) of this method was 0.23 ng mL(-1) and relative standard deviation of 11 replicate determinations was 3.7 %. The IIMS has been applied to selectively separate and determine Pb(II) in real water samples with satisfactory results.
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