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Silica-based monolithic capillary columns-Effect of preparation temperature on separation efficiency

J. Planeta, D. Moravcová, M. Roth, P. Karásek, V. Kahle,

. 2010 ; 1217 (36) : 5737-40. [pub] 20100715

Jazyk angličtina Země Nizozemsko

Typ dokumentu časopisecké články, práce podpořená grantem

Perzistentní odkaz   https://www.medvik.cz/link/bmc12026201

The temperature effects during the sol-gel process and ageing of the silica-based monolith on the structure and separation efficiency of the capillary columns (100microm i.d., 150mm) for HPLC separations were studied. The tested columns were synthesized from a mixture of tetramethoxysilane, polyethylene glycol and urea under the acidic conditions. The temperature was varied from 40 degrees C to 44 degrees C and formation of bypass channels between the silica mold and the capillary wall was examined. The temperature of 43 degrees C was estimated as optimal for preparation of efficient silica capillary columns which were subsequently modified by octadecyldimethyl-N,N-diethylaminosilane or covered by poly(octadecyl methacrylate) and tested using standard mixture of alkylbenzenes under the isocratic conditions.

Citace poskytuje Crossref.org

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