65629 20200117221646.0 doi 10.1016/j.foodchem.2018.02.089 sideral 104424 ART-2018-104424 eng Wen, Yan Determination of ppq-levels of alkylmethoxypyrazines in wine by stirbar sorptive extraction combined with multidimensional gas chromatography- mass spectrometry 2018 Access copy available to the general public Unrestricted Alkylmethoxypyrazines are powerful odorants in many food products. A new method for analysing 3-isopropyl- 2-methoxypyrazine, 3-s-butyl-2-methoxypyrazine and 3-isobutyl-2-methoxypyrazine has been developed and applied to wine. The analytes were extracted from 5 mL of wine using stirbar sorptive extraction followed by thermal desorption and multidimensional gas chromatography-mass spectrometry analysis in a single oven. The extraction conditions were optimized in order to obtain a high recovery of the 3-alkyl-2-methoxypyrazines (MP). The detection limits of the method in all cases were under 0.08 ng/L, well below the olfactory thresholds of these compounds in wine. The reproducibility of the method was adequate (below 10%), the linearity satisfactory and the recoveries in all cases close to 100%. The method has been applied to the analysis of 111 Spanish and French wine samples. The levels found suggest that MP have a low direct impact on the aroma properties of wines from the regions around the Pyrenean massif. info:eu-repo/grantAgreement/ES/DGA/T53 info:eu-repo/grantAgreement/EUR/INTERREG IV POCTEFA-VALOVITIS-EFA017-15 info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 5.399 2018 CHEMISTRY, APPLIED 5 / 71 = 0.07 2018 Q1 T1 NUTRITION & DIETETICS 10 / 86 = 0.116 2018 Q1 T1 FOOD SCIENCE & TECHNOLOGY 7 / 135 = 0.052 2018 Q1 T1 1.768 2018 Analytical Chemistry 2018 Q1 Medicine (miscellaneous) 2018 Q1 Food Science 2018 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion (orcid)0000-0002-3348-0843 Ontañon, Ignacio Universidad de Zaragoza (orcid)0000-0002-4353-2483 Ferreira, Vicente Universidad de Zaragoza (orcid)0000-0002-0730-6606 Lopez, Ricardo Universidad de Zaragoza 2009 750 Universidad de Zaragoza Dpto. Química Analítica Área Química Analítica 255 (2018), 235-241 Food chem. FOOD CHEMISTRY 0308-8146 405205 http://zaguan.unizar.es/record/65629/files/texto_completo.pdf Versión publicada 99247 http://zaguan.unizar.es/record/65629/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:65629 articulos driver 2020-01-17-22:06:32 ARTICLE