title: Evaluation of the key aroma compounds in beef and pork vegetable gravies a la chef by stable isotope dilution assays and aroma recombination experiments.
abstract: Although the aroma compounds of meat processed as such have been studied previously, data on complete homemade dishes containing beef and pork meat were scarcely studied. Recently, 38 odor-active compounds were characterized in beef and pork vegetable gravies using GC-olfactometry. In the present investigation, the most odor-active compounds were quantitated in a freshly prepared stewed beef vegetable gravy (BVG) as well as a stewed pork vegetable gravy (PVG) by means of stable isotope dilution assays. Calculation of odor activity values (OAVs; ratio of concentration to odor threshold) revealed 3-mercapto-2-methylpentan-1-ol, (E,E)-2,4-decadienal, (E,Z)-2,6-nonadienal, (E)-2-decenal, (E)-2-undecanal, and 3-hydroxy-4,5-dimethyl-2(5H)-furanone as the most potent odorants in both gravies. However, significantly different OAVs were found for 12-methyltridecanal, which was much higher in the BVG, whereas (E,Z)-2,4-decadienal showed a clearly higher OAV in the PVG. Aroma recombination experiments performed on the basis of the actual concentrations of the odorants in both gravies revealed a good similarity of the aromas of both model mixtures containing all odorants with OAVs > 1 with those of the original gravies.
authors.affiliation: Lehrstuhl fuer Lebensmittelchemie,  Technische Universitaet Muenchen , Lise-Meitner-Straße 34, 85354 Freising, Germany.
authors.forename: Monika
authors.initials: M
authors.lastname: Christlbauer
authors.forename: Peter
authors.initials: P
authors.lastname: Schieberle
mesh_terms: D000447:Aldehydes / Q000032:analysis; D000818:Animals; D002417:Cattle; D002849:Chromatography, Gas; D008460:Meat / Q000032:analysis*; D009812:Odorants / Q000032:analysis*; D000439:Pentanols / Q000032:analysis; D012903:Smell; D013438:Sulfhydryl Compounds / Q000032:analysis; D013552:Swine; D014675:Vegetables / Q000737:chemistry*
chemical_list: D000447:Aldehydes; D000439:Pentanols; D013438:Sulfhydryl Compounds; C057349:2,4-decadienal; C097196:2,6-nonadienal; C406689:3-mercapto-2-methylpentan-1-ol; C095952:12-methyltridecanal