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Fraises (Fragaria X ananassa Duch. cv. "Korona") sous atmosphère contrôlée à concentration en oxygène faible : composés volatils.

Volatile components of strawberries (Fragaria X ananassa Duch. cv. "Korona") under low oxygen CA-storage.

Auteurs : ROSENFELD H. J., JEKSRUD W. K., AABY K., et al.

Type d'article : Article

Résumé

Compounds responsible for off-flavours in fruits kept in anaerobic atmosphere have partly been identified by means of GC-sniff. Strawberries (cv. Korona) were stored for 4 days at 2.5 °C at 0.5, 1, 1.5, 2, 2.5, 3, 4 and 5% oxygen with nitrogen making up the remainder of the atmosphere. The CO2 level was kept at 0%. Volatile compounds present at higher and lower oxygen levels explained 72% of the total variation, as shown by principal component analysis, mainly due to greater levels of ethyl esters produced at oxygen levels below 4% than above 4%. The GC-sniff panel identified volatile compounds in agreement with descriptions of the literature. However, it was not possible to distinguish between intensity levels of volatiles of fruits stored at different oxygen levels. Ethyl acetate, ethanol, ethyl butanoate, butyl acetate and ethyl hexanoate showed relatively high concentrations in samples stored at 0.5-2% of oxygen and may together with ethylene cause off-flavours like fermented flavour.

Détails

  • Titre original : Volatile components of strawberries (Fragaria X ananassa Duch. cv. "Korona") under low oxygen CA-storage.
  • Identifiant de la fiche : 2005-1979
  • Langues : Anglais
  • Source : Small Fruits Rev. - vol. 2 - n. 2
  • Date d'édition : 2003

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