During a temperature increase, volume of alcohols expands or conversely, during a temperature decrease, the volume contracts. The higher the alcohol content, the more pronounced this phenomenon becomes.
In the field of spirits, during production, for inventory management and bulk transactions, the measured volume can vary significantly due to temperature fluctuations. Therefore, it is essential to convert the measured volumes to 20°C for accuracy.
So how to calculate the volume at 20°C ?
Alcohol Inventories
Alcoholometry Practical Guide
Dec 28, 2022 | Alcohol Inventories, Analysis methods, Production control
The Practical Guide to Alcoholometry includes charts, white pages (Table VII b) and yellow pages (Table XI bb), used to determine the alcohol level at 20°C and calculate the volume of pure alcohol.
This article presents the principle of use of these charts and the differences between these 2 tables. It shows that the volume of pure alcohol calculated with the yellow pages is more approximate. It also explains how to convert at 20°C, a volume measurement when the alcohol level measurement is obtained directly at 20°C.