Artículos de revistas
Solid phase microextraction fibers coated with sol-gel aminopropylsilica/polydimethylsiloxane: Development and its application to screening of beer headspace
Registro en:
Analytical Sciences. Japan Soc Analytical Chemistry, v. 24, n. 9, n. 1141, n. 1146, 2008.
0910-6340
WOS:000259584800012
10.2116/analsci.24.1141
Autor
Biajoli, AFP
Augusto, F
Institución
Resumen
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) The preparation and applicability of solid phase microextraction (SPME) fibers coated with a sol-gel organically modified silica based on 3 -aminopropyltrimethoxysi lane 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 gm. 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. 24 9 1141 1146 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)