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Open AccessDissertation10.47749/t/unicamp.2006.392382

Desenvolvimento de uma nova fase estacionaria para cromatografia por troca anionica

Lucia Maria Laboissiere de Alencar Auler-2006-11-09
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TL;DRAbstract

A new stationary phase based on silica was developed for application in Ion Exchange Chromatography for anion separation. The preparation of the new phase involved silanization of chromatographic silica particles with chloropropyltrimethoxysilane to yield chloropropyl silica. The modified silica was then reacted with pyridine to produce positively charged propylpyridinium groups on the surface, which are the anion exchange sites. The new phase was characterized by elemental analysis and infrared and solid state 13 C and 29 Si NMR spectroscopies. The exchange capacity of the modified silica was investigated by determining its exchangeable chloride content using neutron activation analysis.

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A new stationary phase based on silica was developed for application in Ion Exchange Chromatography for anion separation. The preparation of the new phase involved silanization of chromatographic silica particles with chloropropyltrimethoxysilane to yield chloropropyl silica. The modified silica was then reacted with pyridine to produce positively charged propylpyridinium groups on the surface, which are the anion exchange sites. The new phase was characterized by elemental analysis and infrared and solid state 13 C and 29 Si NMR spectroscopies. The exchange capacity of the modified silica was investigated by determining its exchangeable chloride content using neutron activation analysis.

Keywords

ChemistrySilanizationIon chromatographyIon exchangeSilica gelPhase (matter)ChlorideChromatography

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