Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/93542
Title: Determination of chlorophenoxy acid herbicides by capillary electrophoresis with integrated potential gradient detection
Authors: Qin, W.
Li, S.F.Y. 
Keywords: Capillary electrophoresis
Chlorophenoxy acid herbicides
Field-amplified sample stacking
Potential gradient detection
Solid-phase extraction
Issue Date: Jun-2003
Source: Qin, W.,Li, S.F.Y. (2003-06). Determination of chlorophenoxy acid herbicides by capillary electrophoresis with integrated potential gradient detection. Electrophoresis 24 (12-13) : 2174-2179. ScholarBank@NUS Repository.
Abstract: This report describes separation and detection of chlorophenoxy acid herbicides spiked in drinking water by the technique combining solid-phase extraction, field-amplified sample stacking, capillary electrophoresis, and potential gradient detection. The herbicide solution (400 mL) was concentrated to 0.1 mL by the solid-phase extraction procedure. The buffer containing 3 mM ammonia and 0.3 mM hydroxypropyl-β-cyclodextrin was adjusted to pH 9.0 with ammonia. The sample solution was injected into the capillary to 30% of the whole length, and -9 kV and 9 kV were employed for field-amplified sample stacking and separation, respectively. The herbicides were baseline separated and the detection limits with the above combined techniques were in the range of 1-4 × 10-2 ng/mL.
Source Title: Electrophoresis
URI: http://scholarbank.nus.edu.sg/handle/10635/93542
ISSN: 01730835
Appears in Collections:Staff Publications

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