Lh. Zhang et al., Fast analysis of capillary electrochromatography with non-porous ODS as the stationary phase, ANAL LETTER, 32(13), 1999, pp. 2679-2690
High-speed capillary electrochromatography was developed on both short and
long packed columns with 2 mu m non-porous ODS as the stationary phase. Fac
tors that affect the analysis time of samples, such as voltage, electrolyte
concentration, pH and organic modifier concentration in the mobile phase,
were studied systematically. Fast analysis of aromatic compounds within 13
seconds was realized with column efficiency of 573,000 plates/m and a R.S.D
.% of the retention times of all components in 8 consecutive injections bel
ow 1.0%. which demonstrated the high efficiency and high reproducibility of
such a technique. In addition, DNPH derived aldehydes and ketones in both
standards and environmental samples were separated with high speed.