Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10559692 | Talanta | 2011 | 7 Pages |
Abstract
A porous polysulfone microcapsule containing organic modified montmorillonite and magnetic nanoparticles (OMMT-Fe3O4@PSF) has been successfully prepared by a phase-inversion method and evaluated as a magnetic solid-phase extraction (MSPE) sorbent for clean-up and enrichment of 4-chlorophenol (4-CP) and 2-chlorophenol (2-CP) in aqueous samples. Compared with a microcapsule containing the conventional extraction sorbent C18 (C18-Fe3O4@PSF), OMMT-Fe3O4@PSF had much lower cost, a faster adsorption rate, and superior uptake amounts for the investigated analytes. The proposed microcapsule has been developed for the extraction of 4-CP and 2-CP from environmental water samples and their analysis by high-performance liquid chromatography with UV detection (HPLC-UV). Various parameters, such as pH, extraction time, the mass of sorbent, and the desorption conditions, have been evaluated and the calibration curves of the chlorophenols were linear (R2 â¥Â 0.9985) in the range from 1.01 to 104.5 ng mLâ1. The limits of detection at a signal-to-noise (S/N) ratio of 3 were 0.22 and 0.17 ng mLâ1 and the limits of quantification calculated at S/N = 10 were 1.52 and 1.07 ng mLâ1 for 2-CP and 4-CP, respectively. The recoveries of 2-CP and 4-CP from natural water and the treated wastewater samples were in the range of 84.4-115% with relative standard deviations (RSDs) lower than 7.0%. The results have demonstrated the suitability of the MSPE approach for the analysis of trace chlorophenols in aqueous samples.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Xiaoyan Liu, Juanjuan Yin, Ling Zhu, Guanghui Zhao, Haixia Zhang,