title: Fingerprinting of red wine by headspace solid-phase dynamic extraction of volatile constituents.
abstract: Headspace solid-phase dynamic extraction (HS-SPDE) was investigated for its applicability in quality control analysis of wine volatiles using gas chromatography-mass spectrometry. In total, 196 German red wines were analysed and 22 flavour-relevant alcohols and esters were quantified. The method detection limits were between 0.1 and 9.3 μg L(-1), allowing the dilution of the samples to decrease matrix and competition effects. Quantification resulted in a concentration range from about 1 μg L(-1) linalool up to 380 mg L(-1) 2-methyl-1-propanol. The measurement uncertainty budget was determined for all compounds in a "top-down" approach and was between 2.5 and 7.9%, with an average of 5.5%. A surveillance of the extraction performance of the HS-SPDE devices showed constant results for up to 400 extractions using one extraction needle tip. A chromatogram library for quality and authenticity control of wine samples was created using commercially available chromatogram comparison software.
authors.affiliation: University of Duisburg-Essen, Essen, Germany.
authors.forename: Jens
authors.initials: J
authors.lastname: Laaks
authors.forename: Thomas
authors.initials: T
authors.lastname: Letzel
authors.forename: Torsten C
authors.initials: TC
authors.lastname: Schmidt
authors.forename: Maik A
authors.initials: MA
authors.lastname: Jochmann