562015-03-24 , 法政大学大学院理工学・工学研究科
Many people know barrel storage to cause a phenomenon as maturation aging in whiskey .But many actions brought by maturation aging aren't clear yet. Liquid ionization mass spectrometry (LPI-MS) is useful to study hydrogen-bonded clusters at the liquid surface and in a gas phase at atmospheric pressure. It's analyzed using LPI-MS what kind of change maturation aging gave to a cluster in the whiskey. Both molecular numbers of ethanol and water in the clusters in the whiskey with long maturation aging tended to be increasing.