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Updated: Nov 11, 2025
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Real-time Monitoring of Reactions Performed Using Continuous-flow Processing: The Preparation of 3-Acetylcoumarin as an Example
Published on: November 18, 2015
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Phenylacetaldehyde real-time release kinetics in wine like model solutions
Ana Rita Monforte1, Sara I F S Martins2, António César Silva Ferreira3
1Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina. - Laboratório Associado, Escola Superior de Biotecnologia, Rua de Diogo Botelho, 1327, 4169-005 Porto, Portugal.
Food Chemistry
|March 29, 2021
Summary
This study models phenylacetaldehyde formation, revealing glucose inhibition and sulfur dioxide
Area of Science:
- Food Chemistry
- Chemical Kinetics
- Sensory Science
Background:
- Phenylacetaldehyde contributes to aroma in food products.
- Understanding its formation kinetics is crucial for quality control.
Purpose of the Study:
- To model phenylacetaldehyde formation kinetics.
- To investigate the influence of sugars, phenolic compounds, metals, and sulfur dioxide.
- To elucidate the impact of pH and temperature on adduct stability.
Main Methods:
- Online measurement of release kinetics using proton transfer reaction-mass spectrometry (PTR-MS).
- Fitting formation data with Weibull models.
- Real-time observation of inhibition and binding reactions.
Main Results:
- Weibull models successfully fitted phenylacetaldehyde formation kinetics.
- An activation energy of 73 kJ/mol was estimated.
- Glucose was confirmed to inhibit aldehyde formation, with inhibition levels dependent on metal ions.
- Sulfur dioxide (SO2) was observed to bind phenylacetaldehyde, reducing its release.
- pH and temperature effects on adduct stability and release mechanisms were elucidated.
Conclusions:
- Kinetic models provide insights into phenylacetaldehyde formation.
- Glucose and sulfur dioxide act as key inhibitors.
- Metal ions modulate glucose inhibition, and pH/temperature influence reaction pathways.
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