000171112 001__ 171112
000171112 005__ 20260506144057.0
000171112 0247_ $$2doi$$a10.1016/j.talanta.2026.129908
000171112 0248_ $$2sideral$$a149207
000171112 037__ $$aART-2026-149207
000171112 041__ $$aeng
000171112 100__ $$0(orcid)0009-0008-1503-5739$$aBuñuel-Escudero, María$$uUniversidad de Zaragoza
000171112 245__ $$aHigh-sensitivity quantification of trace carbonyl compounds in wine by a derivatization-free SPE-SBSE-TD-GC-GC-MS approach
000171112 260__ $$c2026
000171112 5060_ $$aAccess copy available to the general public$$fUnrestricted
000171112 5203_ $$aTrace carbonyl compounds play a critical role in wine aroma due to their extremely low sensory thresholds. The analytical challenge arises from the structural diversity of these compounds, which span a broad range of volatility and polarity, as well as from their occurrence at trace levels in a complex matrix. Current approaches frequently rely on derivatization to achieve adequate sensitivity and stability. In this work, a high-sensitivity, derivatization-free analytical strategy is proposed for the quantification of ketones, alkanals, alkenals, and alkadienals in wine, based on a dual preconcentration approach combining solid phase extraction (SPE) and stir bar sorptive extraction (SBSE), followed by thermal desorption and heart-cutting comprehensive gas chromatography coupled to mass spectrometry (TD-GC-(FID)-GC-MS).
Key parameters affecting extraction efficiency and chromatographic performance were systematically optimized, including SPE breakthrough volume, elution conditions, SBSE dilution factor, ionic strength, analyte load, and extraction time. The implementation of heart-cutting GC provided enhanced chromatographic resolution and selectivity for these carbonyls, while reducing interferences and instrumental noise, thereby improving overall sensitivity. The validated method demonstrated good linearity, repeatability (<10%), and reproducibility (<13%), with detection limits below reported sensory thresholds.
The method was successfully applied to 63 young red wine samples, enabling the quantification of trace carbonyls across a wide concentration range. By eliminating derivatization while achieving high sensitivity and robust performance in a complex matrix, the proposed methodology represents a significant analytical advancement for the determination of trace carbonyl compounds in wine.
000171112 536__ $$9info:eu-repo/grantAgreement/ES/DGA/T29-23R
000171112 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttps://creativecommons.org/licenses/by/4.0/deed.es
000171112 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000171112 700__ $$0(orcid)0000-0002-5904-8506$$aBueno, Mónica$$uUniversidad de Zaragoza
000171112 700__ $$0(orcid)0000-0002-4353-2483$$aFerreira, Vicente$$uUniversidad de Zaragoza
000171112 700__ $$0(orcid)0000-0002-3348-0843$$aOntañón, Ignacio$$uUniversidad de Zaragoza
000171112 7102_ $$12009$$2750$$aUniversidad de Zaragoza$$bDpto. Química Analítica$$cÁrea Química Analítica
000171112 773__ $$g307 (2026), 129908 [10 pp.]$$pTalanta$$tTalanta$$x0039-9140
000171112 8564_ $$s3320908$$uhttps://zaguan.unizar.es/record/171112/files/texto_completo.pdf$$yVersión publicada
000171112 8564_ $$s2502646$$uhttps://zaguan.unizar.es/record/171112/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000171112 909CO $$ooai:zaguan.unizar.es:171112$$particulos$$pdriver
000171112 951__ $$a2026-05-06-13:58:56
000171112 980__ $$aARTICLE