75371 20200103141022.0 doi 10.1021/acs.jafc.7b02427 sideral 104525 ART-2018-104525 eng (orcid)0000-0002-4353-2483 Ferreira, Vicente Universidad de Zaragoza Elusive Chemistry of Hydrogen Sulfide and Mercaptans in Wine 2018 Access copy available to the general public Unrestricted This paper summarizes, discusses, and complements recent findings about the fate of H2S and methanethiol (MeSH) during wine storage. Analytical assays to determine free volatile sulfur compounds (VSCs) and brine-releasable (BR-) VSCs in combination with accelerated reductive (AR) aging and micro-oxygenation (MOX) assays allow characterizing the different categories of species able to produce H2S and MeSH and the processes of interconversion. Each wine seems to contain a specific total amount of H2S and MeSH distributed into free, metal-complexed, and oxidized forms (di and polysulfides) interconnected through reversible redox equilibria whose external expression is wine redox potential. Oxidation transforms all mercaptans likely into nonvolatile disulfides and hydrodisulfides. In anoxia, these molecules are spontaneously and quantitatively reduced back. The concomitant accumulation of major wine thiols would provoke complex dissociation and the release of free H2S and MeSH. Additionally, total amounts can increase due to the metal-catalyzed desulfhydration of cysteine and methionine. info:eu-repo/grantAgreement/ES/MINECO/ALI-2014-59840 info:eu-repo/grantAgreement/ES/MINECO/RTC-2016-4935-2 info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 3.571 2018 CHEMISTRY, APPLIED 14 / 71 = 0.197 2018 Q1 T1 AGRICULTURE, MULTIDISCIPLINARY 3 / 56 = 0.054 2018 Q1 T1 FOOD SCIENCE & TECHNOLOGY 27 / 135 = 0.2 2018 Q1 T1 1.111 2018 Chemistry (miscellaneous) 2018 Q1 Agricultural and Biological Sciences (miscellaneous) 2018 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion (orcid)0000-0003-4345-3950 Franco-Luesma, Ernesto (orcid)0000-0003-2885-4668 Vela, Eduardo Universidad de Zaragoza (orcid)0000-0002-0730-6606 López, Ricardo Universidad de Zaragoza (orcid)0000-0003-3641-9164 Hernández-Orte, Purificación Universidad de Zaragoza 2009 750 Universidad de Zaragoza Dpto. Química Analítica Área Química Analítica 66, 10 (2018), pp 2237–2246 J. agric. food chem. Journal of Agricultural and Food Chemistry 0021-8561 527054 http://zaguan.unizar.es/record/75371/files/texto_completo.pdf Postprint 33074 http://zaguan.unizar.es/record/75371/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:75371 articulos driver 2020-01-03-14:02:30 ARTICLE