Visualizing Whisky Twice Up
Purpose
The measurement of whisky aroma in the ‘Twice Up’ was conducted using the ChemZo, a multipurpose ion source.
Methods
| Ion source | ChemZo (BioChromato) |
| Mass Spectrometer | compact QTOF (Bruker) |
| Measurement Method | Twice Up (red): 2 mL of whisky + 2 mL of water Straight (blue): 4 mL of whisky Each sample was placed in a vial, and the aromatic components were measured directly. |
| Data Processing | Using differential analysis with Spectra Scope, aromatic components derived from whisky were identified. The behavior of these aromatic components was examined based on the EIC of the detected ions. |
Results
Twice Up is a way to enjoy the aroma of whisky by diluting it with room-temperature water. Since the whisky is halved with water, the concentration is reduced to 1/2, which would typically lower the intensity when using conventional analytical methods. However, with ‘ChemZo,’ which allows for direct measurement of aromas, esters derived from whisky were observed to increase by more than double, confirming that the aroma is indeed amplified—not just perceived. Interestingly, the aromatic behavior of the two types of esters differed, revealing variations over time depending on the aromatic components. Moreover, as ‘ChemZo’ requires no sample preparation, the analysis was completed in just a few minutes.
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