Please use this identifier to cite or link to this item: https://doi.org/10.1002/elps.200400213
Title: Combination of cationic surfactant-assisted solid-phase extraction with field-amplified sample stacking for highly sensitive analysis of chlorinated acid herbicides by capillary zone electrophoresis
Authors: Xu, Y.
Qin, W.
Lau, Y.H.
Li, S.F.Y. 
Keywords: Capillary electrophoresis
Cationic surfactant-assisted solid-phase extraction
Chlorinated acid herbicide
Field-amplified sample stacking
Poly(vinyl alcohol)-coated capillary
Issue Date: Sep-2005
Citation: Xu, Y., Qin, W., Lau, Y.H., Li, S.F.Y. (2005-09). Combination of cationic surfactant-assisted solid-phase extraction with field-amplified sample stacking for highly sensitive analysis of chlorinated acid herbicides by capillary zone electrophoresis. Electrophoresis 26 (18) : 3507-3517. ScholarBank@NUS Repository. https://doi.org/10.1002/elps.200400213
Abstract: This report describes a novel online field-amplified sample stacking (FASS) procedure to analyze 16 chlorinated acid herbicides. By using a poly(vinyl alcohol) (PVA)-coated capillary to reduce electroosmotic flow and introducing a methanol-water plug before sample loading, the sample injection time could be very long without loss of sample and separation efficiency. Under the optimized condition, the FASS procedure could provide great sensitivity enhancement (5000-10 000-fold) and satisfactory reproducibility (relative standard deviations of migration times less than 2.4%, relative standard deviations of peak areas less than 8.0%). Combined with cationic surfactant-assisted solid-phase extraction (CSA-SPE), the limit of detection of the herbicides ranged from 0.269 to 20.3 ppt, which are two orders lower than those of the US Environmental Protection Agency standard method 515.1. The CSA-SPE-FASS-CE method was successfully applied to the analysis of local pond water. © 2005 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.
Source Title: Electrophoresis
URI: http://scholarbank.nus.edu.sg/handle/10635/75771
ISSN: 01730835
DOI: 10.1002/elps.200400213
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