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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|
|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.|
|Appears in Collections:||Artigos e Materiais de Revistas Científicas - Unicamp|
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