Performance limits of monolithic and packed capillary columns in high-performance liquid chromatography and capillary electrochromatography.
A method is proposed for the comprehensive characterization and comparison of columns in the high-performance liquid chromatographic (HPLC) and capillary electrochromatographic (CEC) modes. Using this approach, column parameters such as the number of plates, the eddy-diffusion and mass-transfer contributions to peak broadening, the permeability, and the analysis time are incorporated in a single graph and a comparison in terms of efficiency and speed is obtained. The chromatographic performance of silica-based and polymer-based monolithic capillary columns is discussed and a comparison is made with the performance of packed columns. Also, the potential of ultra-high-pressure liquid chromatography is discussed in this context. In the HPLC mode, the best results were obtained with silica monoliths; in the CEC mode, the low-density methacrylate-ester-based monoliths showed the best performance.
Eeltink
Sebastiaan
S
Polymer-Analysis Group, van't Hoff Institute for Molecular Sciences, University of Amsterdam, Nieuwe Achtergracht 166, 1018 WV Amsterdam, The Netherlands.
Desmet
Gert
G
Vivó-Truyols
Gabriel
G
Rozing
Gerard P
GP
Schoenmakers
Peter J
PJ
Kok
Wim Th
WT
D002851:Chromatography, High Pressure Liquid / Q000295:instrumentation*; D020374:Chromatography, Micellar Electrokinetic Capillary / Q000295:instrumentation*; D004864:Equipment and Supplies / Q000592:standards*