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Determination of storage stability of butter enriched with unsaturated fatty acids/conjugated linoleic acids (UFA/CLA) using instrumental and sensory methods

Mallia, S.; Piccinali, P.; Rehberger, B.; Badertscher, R.; Escher, F. and Schlichtherle-Cerny, H. (2008) Determination of storage stability of butter enriched with unsaturated fatty acids/conjugated linoleic acids (UFA/CLA) using instrumental and sensory methods. International Dairy Journal, 18, pp. 983-993.

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Summary

The oxidative stability of butter enriched with unsaturated fatty acids and conjugated linoleic acids (UFA/CLA butter) was evaluated by chemical, sensory and microbiological analyses during 8 weeks of storage at 6 °C and compared with that of conventional butter. The odour-active compounds were analyzed by gas chromatography–mass spectrometry combined with olfactometry, using solid phase microextraction.
Olfactometric analysis showed that both, fresh UFA/CLA butter and fresh conventional butter had similar aroma profiles. After 6–8 weeks of storage, UFA/CLA butter showed stronger fatty (butanoic and 3-methyl butanoic acid), metallic [(E,E)-2,4-nonadienal], green [(E)-2-hexenol] and creamy (2-pentanone) notes compared with the conventional samples. A sensory panel described the two fresh butter types as having a similar sensory profile, except for a stronger creamy aroma, a less intense cooked milk aroma and a significantly higher spreadability of the UFA/CLA butters. Sensory descriptive analysis showed also that both butter types aged in a very similar way, with an increase in rancid and oxidized notes.
(c) 2008 Elsevier Ltd. All rights reserved.


EPrint Type:Journal paper
Type of presentation:Paper
Keywords:butter, linoleic acids, UFA, CLA, olfactometry
Subjects: Food systems > Food security, food quality and human health
Food systems > Processing, packaging and transportation
Research affiliation: European Union > QualityLowInputFood > Subproject 5: Processing strategies
Related Links:http://www.elsevier.com/wps/find/journaldescription.cws_home/405860/description#description
Deposited By: Mallia, Silvia
ID Code:16013
Deposited On:19 Aug 2009
Last Modified:12 Apr 2010 07:39
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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