International Journal of Food Science & Technology · 1996 · 12 citations · 9 references
Natural SciencesChemistryFood ScienceAnalytical ChemistryFood AnalysisFood ToxicologyAnalytical ChromatographyChromatographyContaminant AnalysisGas ChromatographyVolatile Organic CompoundsVolatile Substance AnalysisAnalytical Detection LimitsDirect InjectionEnrichmentEnrichment AnalysisHeadspace ExtractionSample PretreatmentVolatile Compound AnalysisVolatile Organic Compounds Analysis
Abstract Applicability of thin-layer headspace (TLHS) procedure giving an aqueous concentrate and also classical purge and trap (PT) in off-line mode to isolate and enrich volatile organohalogen compounds in common beverages was tested. Both enrichment tech-niques were used in combination with gas chromatography – electron capture detection (GC-ECD). TLHS, combined with direct aqueous injection (DAI)-GC-ECD, proved applicable in the determination of volatile organohalogen compounds in all studied beverages, while the PT in a version with no preliminary sample pre-treatment was of limited applicability. Detection limits of the TLHS-based procedure were in the order of 1 ppt. Content of volatile organohalogen compounds in a number of beverages available on the Polish market including mineral waters, beers, juices, carbonated and non-carbonated soft drinks, etc. was determined by means of TLHS-DAI-GC-ECD.
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W. Emile Coleman, Robert G. Melton, Frederick C. Kopfler et al. · Environmental Science & Technology · 1980 · 63 citations