Figure 4.
Electrochromatographic separation of anilines derivatives using monolithic capillary column. Conditions: Poly(hexyl methacrylate-co-1,3-butenediol dimethacrylate-co-2-(acryloyloxy) ethyltrimethyl ammonium chloride) monolithic column, total length 34.5 cm, active length 26 cm, 100 µm i.d. Mobile phase: 80:20 v/v acetonitrile −25 mmol/L Tris phosphate buffer pH 2.1; Electrokinetic injection −3 kV, 3 s; Voltage: −30 kV; EOF marker. UV detection at 200 nm. Peaks: 1- 3,4,5-trimethyloxyaniline, 2- aniline, 3-benzyloxyaniline, 4- phenoxyaniline, 5- 2,4-dimethyloxyaniline.