A procedure that combines two common stacking techniques, field-amplified sample
injection and water removal, with an electroosmotic flow pump, is used to separate phenoxy
acid herbicides by capillary zone electrophoresis. Before sample loading, a long plug of
water was hydrodynamically injected into the capillary both to serve as the medium to permit
a high electric field strength and to contain sample anions. Because of this long length of
water, the number of ions injected into the capillary was greatly increased. Electrokinetic …

A procedure that combines two common stacking techniques, field-amplified sample
injection and water removal, with an electroosmotic flow pump, is used to separate phenoxy
acid herbicides, including picloram, 4-chlorphenoxy acetic acid [4-CPA], 2, 4-DCBA, 2, 4-D,
2, 4, 5-T, dichlorprop, fenoprop and mecoprop, by capillary zone electrophoresis. Before
sample loading, a long plug of water was hydrodynamically injected into the capillary both to
serve as the medium to permit a high electric field strength and to contain sample anions …