Accession Number : ADD006404

Title :   Rapid Water Activity Determining Device and Method.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : Garber ,Esther B ; Cox,Lloyd

Report Date : 31 May 1979

Pagination or Media Count : 11

Abstract : Apparatus and method for determining the water activity (Aw) of a water-containing composition, such as a food, within approximately 10 minutes, by rapidly establishing equilibrium between the water-containing composition and the atmosphere with which it is in contact while maintaining the temperature substantially constant and determining the dew point of this atmosphere, from which the water activity is calculable from the ratio of the partial water vapor pressure at the dew point to the vapor pressure of pure water at the temperature of the atmosphere with which the water-containing composition is in equilibrium. (Author

Descriptors :   *Patent applications, *Water analysis, *Test equipment, Test methods, Determination, Moisture content, Food, Dew point, Hygrometers

Subject Categories : Food, Food Service and Nutrition
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE