| Autor: |
Rossignol J; Laboratoire Interdisciplinaire Carnot de Bourgogne, CNRS UMR 6303, Departement Interface, GERM, University Bourgogne Franche-Comté, 21078 Dijon, France., Cayot P; UMR Procédés Alimentaires et Microbiologiques, PAM UMR A 02.102, University Bourgogne Franche-Comté, AgroSup Dijon, 21000 Dijon, France., Stuerga D; Laboratoire Interdisciplinaire Carnot de Bourgogne, CNRS UMR 6303, Departement Interface, GERM, University Bourgogne Franche-Comté, 21078 Dijon, France., Gougeon RD; UMR Procédés Alimentaires et Microbiologiques, PAM UMR A 02.102, University Bourgogne Franche-Comté, AgroSup Dijon, 21000 Dijon, France., Bou-Maroun E; UMR Procédés Alimentaires et Microbiologiques, PAM UMR A 02.102, University Bourgogne Franche-Comté, AgroSup Dijon, 21000 Dijon, France. |
| Abstrakt: |
Molecularly imprinted sol-gel silica (MIS) coupled to a microwave sensor was designed and used to detect phenylacetaldehyde (PAA), a chemical tracer of wine oxidation. The developed method is fast, cheap and could replace the classical chromatographic methods, which require a tedious sample preparation and are expensive. To reach our objective, five MIS and their control non-imprinted silica (NIS) were synthesized and their extraction capacity toward PAA was studied in hydro alcoholic medium. The selected polymers, based on this first step, were subjected to a selectivity study in the presence of PAA and three other competing molecules. The best polymer was integrated in a microwave sensor and was used to assess PAA in red wine. The developed sensor was able to detect PAA at the µg·L -1 level, which is below the off-flavour threshold. |
