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European Food Research and Technology

, Volume 227, Issue 4, pp 1085–1090 | Cite as

Screening of musty-earthy compounds from tainted cork using water-based soaks followed by headspace solid-phase microextraction and gas chromatography–mass spectrometry

  • Chantal Prat
  • Lluís Bañeras
  • Enriqueta AnticóEmail author
Original Paper

Abstract

Compounds responsible for musty-earthy off-flavours in cork, namely 2-methylisoborneol (MIB), geosmin (GSM), 2,4,6-trichloroanisole (TCA) and 2-methoxy-3-isopropylpyrazine (IPMP), were determined from tainted cork using water-based soaks followed by headspace solid-phase microextraction and gas chromatography–mass spectrometry (HS-SPME–GC–MS). The influence of the fibre coating used and of the extraction time and temperature were investigated for the joint analysis of MIB, GSM, TCA and IPMP. Considering the obtained results, an extraction time of 30 min at a temperature of 50 °C were fixed as experimental conditions, using a divinylbenzene/carboxen-polydimethylsiloxane/polydimethylsiloxane (DVB/CAR/PDMS) fibre. Quality parameters of the chromatographic method were obtained and good recoveries (117–128%) were found in spiked aqueous cork macerates. Using the same experimental conditions, the presence of guaiacol, 2,3,4,6-tetrachloroanisole (TeCA), pentachloroanisole (PCA), 2,4,6-tribromoanisole (TBA) and 2-methoxy-3,5-dimethylpyrazine (MDMP) could also be evaluated in a single chromatogram. From all the compounds analyzed in tainted samples, TCA and guaiacol were the only contaminants present and only TCA concentrations were found above its perception threshold in water.

Keywords

Cork Musty-earthy taint Solid phase microextraction 

Notes

Acknowledgments

C. Prat is the recipient of PhD grant from the University of Girona and the Council of Palafrugell (BRAE 04/03). We thank Geyru S.A. and TESA for the provision of cork material and help in organoleptic analyses.

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Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  • Chantal Prat
    • 1
  • Lluís Bañeras
    • 1
  • Enriqueta Anticó
    • 2
    Email author
  1. 1.Molecular Ecology Group, IEAUniversity of Girona, Facultat de CiènciesGironaSpain
  2. 2.Department of ChemistryUniversity of Girona, Facultat de CiènciesGironaSpain

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