Determination of chlorophenoxy acid herbicides by capillary electrophoresis with integrated potential gradient detection

作者：Qin WD; Li SFY^*

来源：Electrophoresis, 2003, 24(12-13): 2174-2179.

DOI：10.1002/elps.200305471

• capillary electrophoresis
• chlorophenoxy acid herbicides
• field-amplified sample stacking
• potential gradient detection
• solid-phase extraction

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-beta-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 x 10(-2) ng/mL.

• 出版日期2003-6