Synthesis and Characterization of a Novel Stationary Phase, Si-Zr/Ti(PMTDS), Based upon Ternary Oxide Support for High Performance Liquid Chromatography
نویسندگان
چکیده
Uma nova fase estacionária baseada na imobilização térmica do poli(metiltetradecilsiloxano) (PMTDS) sobre partículas de sílica recoberta com mistura de zircônia e titânia foi preparada e avaliada pela separação cromatográfica de misturas testes neste trabalho. As partículas esféricas foram caracterizadas por análise elementar, MEV, infravermelho e Si RMN. As propriedades físico-químicas da fase PMTDS com suporte misto se apresentaram intermediárias às de fases PMTDS baseadas em sílica titanizada e sílica zirconizada. O desempenho cromatográfico da fase Si-Zr/Ti(PMTDS) foi similar ao desempenho de fases contendo apenas um dos óxidos metálicos no suporte, a preparação da fase permitiu a observação do efeito de cada óxido no processo de separação e estabilidade da fase Si-Zr/Ti(PMTDS). A estabilidade hidrolítica da fase Si-Zr/Ti(PMTDS) foi similar a de fases PMTDS com suporte de sílica titanizada, e duas vezes mais estáveis que fases PMTDS com suporte de sílica.
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تاریخ انتشار 2013