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Type: Artigo de periódico
Title: Solid Phase Microextraction Fibers Coated With Sol-gel Aminopropylsilica/polydimethylsiloxane: Development And Its Application To Screening Of Beer Headspace.
Author: Biajoli, André F P
Augusto, Fabio
Abstract: The preparation and applicability of solid phase microextraction (SPME) fibers coated with a sol-gel organically modified silica based on 3-aminopropyltrimethoxysilane and polydimethylsiloxane (APTMS/PDMS) are described here. Micrographs of the coated fibers revealed a rugous surface; the thickness of the coating was estimated to be less than 30 microm. The APTMS/PDMS fibers were tested with synthetic samples and compared to commercial fibers for headspace SPME analysis of beer. Extraction and desorption using the APTMS/PDMS fibers were faster, which is typical for sol-gel SPME fibers. For polar and semi-polar compounds on beer headspace, the extraction efficiencies of the APTMS/PDMS fiber were superior to those of conventional fibers. The APTMS/PDMS fiber was found to be capable of extracting a broad range of analytes, including highly polar acidic species such as organic acids.
Citation: Analytical Sciences : The International Journal Of The Japan Society For Analytical Chemistry. v. 24, n. 9, p. 1141-6, 2008-Sep.
Rights: aberto
Date Issue: 2008
Appears in Collections:Unicamp - Artigos e Outros Documentos

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