Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 1071, Issue 1-2, Pages 119-124Publisher
ELSEVIER
DOI: 10.1016/j.chroma.2004.09.075
Keywords
solid-phase microextraction; headspace; gas chromatography; solvents residues; vegetable oils; pharmaceuticals
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The application of headspace solid-phase microextraction for isolation and enrichment of solvent residues from oils and pharmaceuticals is discussed. The optimal parameters for isolation and preconcentration of common process solvents (hexane, benzene, toluene and selected chloroderivatives of hydrocarbons) were established. Four fiber types (100 mu m polydimethylsiloxane (PDMS), 75 mu m Carboxen-PDMS, 65 mu m PDMS-divinylbenzene and 85 mu m polyacrylate) were evaluated to choose the most efficient coating, able to absorb the greatest amount of analytes. GC-flame ionization detection (FID) and GC-electron-capture detection systems were used for quantitative and qualitative analysis, adequately to the appropriate group of the analytes. For all compounds the limit of detection (LOD), linearity, dynamic range, repeatability and intermediate precision were estimated. (c) 2004 Elsevier B.V. All rights reserved.
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