Chemija / Chemistry
 ISSN 0235-7216 ISSN 2424-4538 (online) |
2012 m. Nr. 3 Fast determination of Prangos uloptera essential oil by nanoporous silica-polypyrrole SPME fiber
A microwave-assisted SPME method with a new nanoporous polypyrrole / SBA-15 was successfully applied to the study of the essential oil composition of Prangos uloptera DC. The sample was irradiated by microwave radiation and its volatile components were collected by the fiber from the sample headspace and directly injected into a GC-MS injection port for analysis. A simplex method was used for optimization of three different parameters affecting the efficiency of the extraction. Under the optimized conditions (i. e. sample weight, 4 g, extraction time, 5 min and microwave power 450 W), the polypyrrole / SBA-15 nanonporous fiber could efficiently adsorb volatile components of P. uloptera. In comparison to the HD method, the proposed technique could equally monitor almost all the components of the sample, in an easier way, shorter time and requiring a much lower amount of the sample.
Keywords: microwave-assisted hydrodistillation, solid phase microextraction, polypyrrole |
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