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Real-Time Detection of Phenylacetaldehyde in Wine: Application of a Microwave Sensor Based on Molecularly Imprinted Silica

Abstract : 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.
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Submitted on : Thursday, March 31, 2022 - 5:43:42 PM
Last modification on : Thursday, August 4, 2022 - 5:07:50 PM

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Jérôme Rossignol, Philippe Cayot, Didier Stuerga, Regis Gougeon, Elias Bou-Maroun. Real-Time Detection of Phenylacetaldehyde in Wine: Application of a Microwave Sensor Based on Molecularly Imprinted Silica. Molecules, MDPI, 2022, 27 (5), pp.1492. ⟨10.3390/molecules27051492⟩. ⟨hal-03626761⟩

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