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Type: Artigo de periódico
Title: Influence Of Air On Polybutadiene Used In The Preparation Of Stationary Phases For High-performance Liquid Chromatography.
Author: Lopes, Nilva P
Collins, Kenneth E
Jardim, Isabel C S F
Abstract: A 100 ml 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 degrees 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 degrees C further enhances column performance. The best performance (10(5) plates m(-1)) resulted from 4 h heating of PBD-6 material in nitrogen.
Subject: Air
Chromatography, Gel
Chromatography, High Pressure Liquid
Rights: fechado
Identifier DOI: 
Date Issue: 2004
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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