title: Identification and origin of odorous sulfur compounds in cooked ham.
abstract: The aim of this work was to identify and gain further knowledge on the origin of sulfur compounds present in the volatile fraction of cooked ham, and on their role in the aroma of this product. To this end, we performed analyses by one- and two-dimensional gas chromatography coupled with mass spectrometry, and olfactometry. Among the odorant sulfur compounds identified, three furans present in trace amounts proved to have very intense odours responsible for the "meaty, cooked ham" notes of this pork product. They were 2-methyl-3-furanthiol, 2-methyl-3-(methyldithio)furan and bis(2-methyl-3-furyl) disulphide. Addition of thiamine or cysteine also enabled us to study the effect of these odour precursors on the formation of odorant furans during the cooking of ham. The results revealed a direct link between the thermal degradation of thiamine and the formation of these compounds. By contrast, addition of cysteine in the presence of fructose or xylose did not appreciably increase their production.
authors.affiliation: IFIP - Laboratoire d'Essais et de Mesures Physiques, 94704 Maisons-Alfort, France. Electronic address: caroline.thomas@clermont.inra.fr.
authors.forename: Caroline
authors.initials: C
authors.lastname: Thomas
authors.affiliation: Institut National de la Recherche Agronomique (INRA), UR 370 QuaPA, MASS group, 63122 Saint-Genès-Champanelle, France.
authors.forename: Frédéric
authors.initials: F
authors.lastname: Mercier
authors.affiliation: Institut National de la Recherche Agronomique (INRA), UR 370 QuaPA, MASS group, 63122 Saint-Genès-Champanelle, France.
authors.forename: Pascal
authors.initials: P
authors.lastname: Tournayre
authors.affiliation: IFIP - Laboratoire d'Essais et de Mesures Physiques, 94704 Maisons-Alfort, France.
authors.forename: Jean-Luc
authors.initials: JL
authors.lastname: Martin
authors.affiliation: Institut National de la Recherche Agronomique (INRA), UR 370 QuaPA, MASS group, 63122 Saint-Genès-Champanelle, France.
authors.forename: Jean-Louis
authors.initials: JL
authors.lastname: Berdagué
mesh_terms: D000818:Animals; D008401:Gas Chromatography-Mass Spectrometry; D008461:Meat Products / Q000032:analysis*; D009812:Odorants / Q000032:analysis*; D013457:Sulfur Compounds / Q000737:chemistry*; D013552:Swine; D055549:Volatile Organic Compounds / Q000737:chemistry*
chemical_list: D013457:Sulfur Compounds; D055549:Volatile Organic Compounds
keywords: Aroma precursors; Cooked ham; Key odorants; Olfactometry; One- and two-dimensional chromatography; Sulphur compounds