Determination of chlorophenoxy acid herbicides by capillary electrophoresis with integrated potential gradient detection
- 8 July 2003
- journal article
- research article
- Published by Wiley in Electrophoresis
- Vol. 24 (12-13), 2174-2179
- https://doi.org/10.1002/elps.200305471
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.Keywords
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