Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9748439 | Journal of Chromatography A | 2005 | 6 Pages |
Abstract
A highly selective imprinted amino-functionalized silica gel sorbent was prepared by combining a surface molecular imprinting technique with a sol-gel process for on-line solid-phase extraction-HPLC determination of trace pentachlorophenol (PCP) in water samples. The PCP-imprinted amino-functionalized silica sorbent was characterized by FT-IR, SEM, nitrogen adsorption and the static adsorption experiments. The imprinted functionalized silica gel sorbent exhibited high selectivity and offered a fast kinetics for the adsorption and desorption of PCP. The prepared sorbent was shown to be promising for on-line solid-phase extraction for HPLC determination of trace levels of PCP in environmental samples. With a sample loading flow rate of 5 ml minâ1 for 2 min, an enhancement factor of 670 and a detection limit (S/N = 3) of 6 ng lâ1 were achieved at a sample throughput of five samples hâ1. The precision (RSD) for nine replicate on-line sorbent extractions of 10 μg lâ1 PCP was 3.8%. The sorbent also offered good linearity (r = 0.9997) for on-line solid-phase extraction of trace levels of PCP. The method was applied to the determination of PCP in local lake water, river water and wastewater samples.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
De-Man Han, Guo-Zhen Fang, Xiu-Ping Yan,