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Food Chem

Title:		Volatile compounds in low-acid fermented sausage 'espetec' and sliced cooked pork shoulder subjected to high pressure processing. A comparison of dynamic headspace and solid-phase microextraction
Author(s):		Rivas-Canedo A; Juez-Ojeda C; Nunez M; Fernandez-Garcia E;
Address:		"Departamento de Tecnologia de Alimentos, Instituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria (INIA), Carretera de La Coruna, km. 7, Madrid 28040, Spain. Electronic address: ana.rivas@inia.es. Departamento de Tecnologia de Alimentos, Instituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria (INIA), Carretera de La Coruna, km. 7, Madrid 28040, Spain"
Journal Title:		Food Chem
Year:		2012
Volume:		20111018
Issue:		1
Page Number:		18 - 26
DOI:		10.1016/j.foodchem.2011.10.012
ISSN/ISBN:		1873-7072 (Electronic) 0308-8146 (Linking)
Abstract:		"Two extraction techniques, dynamic headspace extraction (DHE) and solid-phase microextraction (SPME), were compared to assess the effect of high-pressure treatment (400MPa, 10min, 12 degrees C) on the volatile compounds of low-acid fermented sausage 'espetec' and sliced cooked pork shoulder stored at 4 degrees C. DHE was more efficient at extracting low-boiling compounds such as ethanal, 2,3-butanedione and alcohols, while SPME extracted more efficiently a higher number of chemical families, especially fatty acids. The effect of pressurisation on the volatile fraction of 'espetec' was better categorized by DHE, whereas SPME was more appropriate for cooked pork shoulder. The volatile fraction of 'espetec' changed slightly after pressurisation, mainly showing a decrease in the levels of lipid-derived compounds, like linear alkanes, aldehydes, or 1-alcohols in pressurised samples. The volatile profile of cooked pork shoulder underwent substantial changes during refrigerated storage, mainly due to microbial metabolism, most of these changes being limited by HPP"
Keywords:		Cooking Fermentation Meat Products/*analysis Red Meat/*analysis Solid Phase Microextraction/*methods Volatile Organic Compounds/*chemistry Cooked meat products Dynamic headspace extraction High-pressure processing Low-acid fermented sausage Spme Volatile;
Notes:		"MedlineRivas-Canedo, Ana Juez-Ojeda, Cristina Nunez, Manuel Fernandez-Garcia, Estrella eng Research Support, Non-U.S. Gov't England 2012/05/01 Food Chem. 2012 May 1; 132(1):18-26. doi: 10.1016/j.foodchem.2011.10.012. Epub 2011 Oct 18"