ebulliometer

ebulliometer A food or kitchen tool used to determine alcohol content by volume by measuring differences in boiling points between water and alcohol. The tool is not entirely accurate. In these modern times, wineries have sophisticated chemistry labs and use a gas chromatograph for a more precise measurement of alcohol content by volume.
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Ebulliometer

Laboratory apparatus used to determine the alcohol content of a wine. It measures the precise boiling point of the wine; then, taking into consideration the atmospheric pressure at the time, the analyst determines the alcohol content from the relative boiling points of pure alcohol, water and the wine. (The boiling point of any wine is always somew...
Found on http://www.edenwines.co.uk/Glossary_e.html

Ebulliometer

An ebulliometer is designed to accurately measure the boiling point of liquids by measuring the temperature of the vapor-liquid equilibrium either isobarically or isothermally. The primary components in a Swietoslawski ebulliometer, which operates isobarically, are: the boiler, the Cottrell pumps, the thermowell, and the condenser. Such an ebullio...
Found on http://en.wikipedia.org/wiki/Ebulliometer
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