title: Ability of possible DMS precursors to release DMS during wine aging and in the conditions of heat-alkaline treatment.
abstract: The origin of dimethyl sulfide (DMS) produced during wine aging was examined through different assays. The production of DMS during the model aging of a wine and the concomitant decrease of residual potential DMS (PDMS), as DMS released by heat-alkaline treatment in 0.5 M sodium hydroxide at 100 degrees C for 1 h, were demonstrated. Then, dimethyl sulfoxide (DMSO), methionine sulfoxide (MSO), S-methylmethionine (SMM), and dimethylsulfonium propanoic acid (DMSPA), reported previously as possible DMS precursors, were investigated for their ability to be DMS precursors in wine in the conditions of this model aging and of the heat-alkaline treatment. The results showed that DMSO, MSO, and DMSPA could hardly be DMS precursors in the conditions used, whereas SMM appeared to be a good candidate. Finally, the use of [(2)H(6)]-DMSPA as an internal standard for PDMS determination was proposed, because it provided better reproducibility than [(2)H(6)]-DMS used as an external standard.
authors.affiliation: Institut National de la Recherche Agronomique, Unité Mixte de Recherche Sciences Pour l'Oenologie, Equipe Technologies Intégratives, 2 place Pierre Viala, 34060 Montpellier Cedex 1, France.
authors.forename: Marie A
authors.initials: MA
authors.lastname: Segurel
authors.forename: Alain J
authors.initials: AJ
authors.lastname: Razungles
authors.forename: Christophe
authors.initials: C
authors.lastname: Riou
authors.forename: Mafalda G L
authors.initials: MG
authors.lastname: Trigueiro
authors.forename: Raymond L
authors.initials: RL
authors.lastname: Baumes
mesh_terms: D004121:Dimethyl Sulfoxide / Q000378:metabolism; D005285:Fermentation; D005511:Food Handling / Q000379:methods*; D006358:Hot Temperature; D006863:Hydrogen-Ion Concentration; D008715:Methionine / Q000031:analogs & derivatives* / Q000378:metabolism; D015203:Reproducibility of Results; D012972:Sodium Hydroxide; D013440:Sulfides / Q000032:analysis* / Q000378:metabolism*; D013997:Time Factors; D014814:Vitamin U / Q000378:metabolism; D014920:Wine / Q000032:analysis*; D015003:Yeasts / Q000378:metabolism
chemical_list: D013440:Sulfides; D014814:Vitamin U; D012972:Sodium Hydroxide; D008715:Methionine; C004784:dimethyl sulfide; C013111:methionine sulfoxide; D004121:Dimethyl Sulfoxide