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Meat Sci

Title:		Influence of the type of fiber coating and extraction time on foal dry-cured loin volatile compounds extracted by solid-phase microextraction (SPME)
Author(s):		Lorenzo JM;
Address:		"Centro Tecnologico de la Carne de Galicia, Rua Galicia No. 4, Parque Tecnologico de Galicia, San Cibran das Vinas, 32900 Ourense, Spain. Electronic address: jmlorenzo@ceteca.net"
Journal Title:		Meat Sci
Year:		2014
Volume:		20130615
Issue:		1
Page Number:		179 - 186
DOI:		10.1016/j.meatsci.2013.06.017
ISSN/ISBN:		1873-4138 (Electronic) 0309-1740 (Linking)
Abstract:		"Extraction of dry-cured loin volatile compounds by solid-phase microextraction (SPME) was optimized. Two different fiber coatings: carboxen/polydimethylsiloxane (CAR/PDMS) and divinylbenzene/carboxen/polydimethylsiloxane (DVB/CAR/PDMS), and three extraction times (15, 30 and 45 min) were assayed. Between the fibers tested, CAR/PDMS coated fibers extracted between two and three times more total amount of volatile compounds than the DVD/CAR/PDMS coating (1314x10(6) vs. 526x10(6) area units). Fifty five compounds were extracted by the CAR/PDMS fiber, while only 48 of these were found with the DVB/CAR/PDMS fiber. On the other hand, 6 additional volatile compounds were extracted by the CAR/PDMS coating, all of them being of low molecular weight. Three of the major compounds extracted, hexanoic acid, methyl ester; butanoic acid, 3-methyl-, methyl ester and hexanal, were found in high proportion in both fiber coatings. The effect of exposure time was more marked for the DVD/CAR/PDMS fiber than for the CAR/PDMS coating. Fifteen minutes of extraction provided a volatile compounds profile with lower area counts for most compounds and significantly different to that obtained with 30 and 45 min of extraction. The extraction yields of dry-cured loin volatile compounds varied according to the fiber coating used and the time of exposure. Therefore, extraction conditions should be selected depending on the objective of the study. Finally, it can be concluded that both porous fibers tested, CAR/PDMS and DVB/CAR/PDMS, provide a similar volatile compounds profile for dry-cured foal loin"
Keywords:		"Animals Butyric Acid/isolation & purification Caproates/isolation & purification Dimethylpolysiloxanes/*analysis Esters Evaluation Studies as Topic Gas Chromatography-Mass Spectrometry Horses Muscle, Skeletal/chemistry *Solid Phase Microextraction Tempera;"
Notes:		"MedlineLorenzo, Jose M eng England 2013/07/31 Meat Sci. 2014 Jan; 96(1):179-86. doi: 10.1016/j.meatsci.2013.06.017. Epub 2013 Jun 15"