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Type: Artigo de periódico
Title: Determination Of Polymeric Layer Thickness On Immobilized Stationary Phases For High-performance Liquid Chromatography Using Thermogravimetric Analyses [determinação Da Espessura Da Camada Polimérica De Fases Estacionárias Imobilizadas Para Cromatografia Líquida De Alta Eficiência Por Termogravimetria]
Author: Faria A.M.
Marcos C.A.
Vigna C.R.M.
Collins C.H.
Abstract: This paper presents a simple and practical thermogravimetric method for determining the layer thickness of immobilized polymer stationary phases used in reversed-phase high-performance liquid chromatography. In this method, the weight loss of different polysiloxanes immobilized onto chromatographic supports, determined over the temperature range 150-650 °C, demonstrated excellent agreement with the sum of carbon and hydrogen content obtained by elemental analysis. The results presented here suggest that the thermogravimetric procedure is an accurate and precise method to determine the polymeric material content on polymer-coated stationary phases.
Rights: aberto
Identifier DOI: 10.1590/S0100-40422008000200040
Date Issue: 2008
Appears in Collections:Unicamp - Artigos e Outros Documentos

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