Comparison of the efficiency of microparticulate and monolithic capillary columns

Autor: Wim M.C. Decrop, Peter J. Schoenmakers, Sebastiaan Eeltink, Gerard P. Rozing, Wim Th. Kok
Přispěvatelé: Analytical Chemistry and Forensic Science (HIMS, FNWI)
Rok vydání: 2004
Předmět:
Zdroj: Journal of Separation Science, 27(17-18), 1431-1440. Wiley-VCH Verlag
ISSN: 1615-9314
1615-9306
Popis: A comparison is made between the efficiency of microparticulate capillary columns and silica and polymer-based monolithic capillary columns in the pressure-driven (high-performance liquid chromatography) and electro-driven (capillary electrochromatography) modes. With packed capillary columns similar plate heights are possible as with conventional packed columns. However, a large variation is observed in the plate heights for individual columns. This can only be explained by differences in the quality of the packed bed. The minimum plate height obtained with silica monolithic capillary columns in the HPLC mode is approximately 10 microm, which is comparable to that of columns packed with 5-microm particles. The permeability of wide-pore silica monoliths was found to be much higher than that of comparable microparticulate columns, which leads to much lower pressure drops for the same eluent at the same linear mobile phase velocity. For polymer-based monolithic columns (acrylamide, styrene/divinyl benzene, methacrylate, acrylate) high efficiencies have been found in the CEC mode with minimum plate heights between 2 and 10 microm. However, in the HPLC mode minimum plate heights in the range of 10 to 25 microm have been reported.
Databáze: OpenAIRE
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