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|Type:||Artigo de evento|
|Title:||Influence Of Air On Polybutadiene Used In The Preparation Of Stationary Phases For High-performance Liquid Chromatography|
|Abstract:||A 100ml bottle of polybutadiene, PBD, was repeatedly exposed to air over a period of 6 months. Samples were taken at time zero (PBD-0), after 3 months (PBD-3) and 6 months (PBD-6). These samples were sorbed onto HPLC silica by an open-air solution-evaporation procedure, which involved exposure to the atmosphere for 6 days. Portions of the three sets of samples were used to compare self-immobilization and the effects of 100°C thermal treatments in air or nitrogen on HPLC performance of the resulting phases. It is concluded that self-immobilization is enhanced by prior exposure of sorbed PBD to air and subsequent heating at 100°C further enhances column performance. The best performance (105platesm-1) resulted from 4h heating of PBD-6 material in nitrogen. © 2004 Elsevier B.V. All rights reserved.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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