Investigation of thiol levels in young commercial South African Sauvignon Blanc and Chenin Blanc wines using propiolate derivatization and GC-MS/MS

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dc.contributor.authorCoetzee, C.en_ZA
dc.contributor.authorSchulze, A.en_ZA
dc.contributor.authorMokwena, L.en_ZA
dc.contributor.authorDu Toit, W. J.en_ZA
dc.contributor.authorBuica, A. S.en_ZA
dc.date.accessioned2020-01-31T09:43:46Z
dc.date.available2020-01-31T09:43:46Z
dc.date.issued2018en_ZA
dc.descriptionCITATION: Coetzee, C. et al. 2018. Investigation of thiol levels in young commercial South African Sauvignon Blanc and Chenin Blanc wines using propiolate derivatization and GC-MS/MS. South African Journal of Enology and Viticulture, 39(2):180-184, doi:10.21548/39-2-2683.en_ZA
dc.descriptionThe original publication is available at https://www.journals.ac.za/index.php/sajeven_ZA
dc.description.abstractIn this work, the ethyl propiolate method for analysing thiols in white wine by GC-MS, originally proposed by Herbst-Johnstone et al.) (2013), has been adapted to GC-MS/MS and has been validated. The method performance has shown improvement in terms of sensitivity (limit of detection, LOD) and of the number of compounds measured. In addition to 3-mercaptohexanol (3MH), 3-mercaptohexyl acetate (3MHA), and 4-mercapto-4-methylpentan-2-one (4MMP), the adapted method can also measure 2-furanmethanethiol (FMT) and makes use of a commercially-available internal standard (IS), 4-methoxy-2-methyl-2-butanethiol (4M2M2B, IS). The proposed method was applied to determine thiol levels in young commercial South African Sauvignon and Chenin Blanc wines. The samples (n=20 for each cultivar) were chosen according to a high frequency of the typical descriptors associated with this class of impact compounds. 3MH was found at 178-904 ng/L and 99-1124 ng/L, and 3MHA at 23-151 ng/L and 5-253 ng/L in Sauvignon and Chenin Blanc respectively. 4MMP was present in Sauvignon Blanc in concentrations up to 21.9 ng/L, but in none of the Chenin Blanc samples.en_ZA
dc.description.urihttps://www.journals.ac.za/index.php/sajev/article/view/2683en_ZA
dc.description.versionPublisher's versionen_ZA
dc.format.extent5 pagesen_ZA
dc.identifier.citationCoetzee, C. et al. 2018. Investigation of thiol levels in young commercial South African Sauvignon Blanc and Chenin Blanc wines using propiolate derivatization and GC-MS/MS. South African Journal of Enology and Viticulture, 39(2):180-184, doi:10.21548/39-2-2683.en_ZA
dc.identifier.issn2224-7904 (online)en_ZA
dc.identifier.issn0253-939X (print)en_ZA
dc.identifier.otherdoi:10.21548/39-2-2683
dc.identifier.urihttp://hdl.handle.net/10019.1/107406en_ZA
dc.language.isoen_ZAen_ZA
dc.publisherSouth African Society for Enology and Viticultureen_ZA
dc.rights.holderAuthors retain copyrighten_ZA
dc.subjectThiols -- Analysisen_ZA
dc.subjectSauvignon blanc (Wine) -- South Africaen_ZA
dc.subjectChenin Blanc wines -- South Africaen_ZA
dc.subjectWhite winesen_ZA
dc.subjectWine and wine making -- Chemistryen_ZA
dc.subjectWine -- Flavor and odoren_ZA
dc.titleInvestigation of thiol levels in young commercial South African Sauvignon Blanc and Chenin Blanc wines using propiolate derivatization and GC-MS/MSen_ZA
dc.typeArticleen_ZA
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