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|Type:||Artigo de periódico|
|Title:||C-18 stationary phases sorbed on zirconized silica for use in HPLC|
|Abstract:||Silica, with 10 mum diameter particles and 8.7 nm pore size, was zirconized (to 16.2% ZrO2) by reaction with zirconium butoxide, then functionalized by sorption of PMODS (poly(methyloctadecylsiloxane)) using an evaporation procedure with hexane as solvent. Infrared spectroscopy was used to examine the surface concentration of silanol groups. The thermal stability of the material was verified by thermogravimetric analysis. The C-18 stationary phase was used to pack 150 x 3.9 mm i.d. columns, which exhibited satisfactory efficiencies (25000-30000 plates/m). The values of asymmetry factor, alpha, k, and Rs were within acceptable limits.|
|Editor:||Marcel Dekker Inc|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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