Alcoholometry
As alcoholometry is called the doctrine of the determination of the alcohol content in liquids.
Meyers Konversations-Lexikon, 4th edition (see #Weblinks ), explains:
“There is no way of separating alcohol from a liquid with quantitative accuracy in order to be able to weigh it directly. But since alcohol is specifically lighter than water, one can calculate its alcohol content from the density of a liquid, provided that it is a pure mixture of alcohol and water and does not contain any other substances which influence the density. Liquids such as wine and beer cannot be checked directly for their alcohol content using the hydrometer (see d.). This can be achieved by constructing a small still with a good cooling device, distilling off the alcohol from the liquid to be examined, bringing the distillate to the volume of the sample taken and then determining the density. "
The Ebullioscope uses the boiling point properties to determine the alcohol content of wine.
With the vaporimeter, the alcohol content of liquids can be determined from the vapor pressure at the boiling point. The vaporimeter was developed by Heinrich Geißler (not to be confused with the Palatinate winemaker Heiner Geißler ).
Finally, the pycnometer and the flexible oscillator are used to determine the alcohol content.
See also
Web links
- Alcoholometry . In: Meyers Konversations-Lexikon . 4th edition. Volume 1, Verlag des Bibliographisches Institut, Leipzig / Vienna 1885–1892, p. 371.
- Video demonstration of different methods for determining the alcohol content of a distillate
- CVUA Karlsruhe: Rapid determination of the alcohol content in emulsion liqueurs and other spirits using steam distillation and flexural vibrators
- CVUA Karlsruhe: Fully automatic determination of density, alcohol and extract in egg liqueur using steam distillation and a flexural oscillator with peristaltic pump
Individual evidence
- ↑ Vaporimeter at Zeno.org .