Novel device could help make wine aromas perfect

Tokyo, July 13  (IANS) To help wineries avoid  off-aromas, researchers in Japan have developed a sensitive device for  detecting a compound that can affect the beverage's fragrance.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 a wet newspaper.When  present in high amounts in wine, the compound acetaldehyde -- frequently  found in a lot of places and foods such as fruits, vegetables and human  saliva -  produces an unpleasant odour 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 from Tokyo Medical and Dental University, and colleagues  tested the new device 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, according to the study published in the  journal ACS Sensors.The device could provide wineries with a  more practical method for monitoring this make-or-break ingredient, the  researchers said.