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ACS News Service Weekly PressPac: Wed Jul 12 09:18:35 EDT 2017

Mulling over the aromas of wine

"Improved Sensitivity of Acetaldehyde Biosensor by Detecting ADH Reverse Reaction-Mediated NADH Fluoro-Quenching for Wine Evaluation"
ACS Sensors

A fine wine has an ideal balance of ingredients. Too much or too little of a component could mean the difference between a wine with a sweet and fruity aroma and one that smells like wet newspaper. To help wineries avoid off-aromas, a team reports in ACS Sensors a sensitive device for detecting a compound that can affect the beverage’s fragrance.

Acetaldehyde is frequently found in a lot of places and foods, such as fruits, vegetables and human saliva. When present in high amounts in wine, it produces an unpleasant odor and affects the fermentation process. Therefore, it is important for winemakers to monitor the acetaldehyde levels, which can vary with temperature, pH and oxygen concentrations. Current methods involve trained experts, long processing times and complex equipment. Kohji Mitsubayashi and colleagues propose a sensitive, versatile detector that is more selective than its predecessors.

The team tested for acetaldehyde in nine different wines, both red and white. The new detector produced results comparable to those obtained with traditional methods, but was simpler to operate and produced real-time results. The researchers say that the device could provide wineries with a more practical method for monitoring this make-or-break ingredient.

The authors acknowledge funding from the Japan Society for the Promotion of Science Grant-in-Aid for Scientific Research System, the Japan Science and Technology Agency and the Ministry of Education, Culture, Sports, Science and Technology Special Funds for Education and Research “Advanced Research Program in Neo-Biology.”

Note: ACS does not conduct research, but publishes and publicizes peer-reviewed scientific studies.

 

New sensors can detect a compound that affects the smell of red and white wines.
Credit: Mariyana M/Shutterstock.com