Accession Number : AD0687625

Title :   DETERMINATION OF A CONSTITUENT IN VOLATILE LIQUIDS,

Corporate Author : LOCKHEED MISSILES AND SPACE CO PALO ALTO CALIF LOCKHEED RESEARCH LAB

Personal Author(s) : Katan,Theodore

Report Date : 17 JUL 1968

Pagination or Media Count : 2

Abstract : An effect of the phenomenon of counter flow of gas and vapor through microporous membranes is conveniently observed if a suitable membrane is placed over the end of a horizontal tube that contains a bead of volatile liquid. The induced flow of the surrounding gas into the tube imparts a motion to the liquid that depends on the liquid's vapor pressure. The movement of the liquid may be used in quantitative analyses of liquids containing known constituents if vapor pressure is appreciably changed as the analyzed constituent is changed in concentration. This method has been applied in the determination of ethanol in ethanol-water solutions, and a description is given of the experimental procedure and results. At room temperature, the vapor pressures of ethanol and water are sufficiently different to enable such analysis. (Author)

Descriptors :   (*LIQUIDS, *CHEMICAL ANALYSIS), (*ETHANOLS, CHEMICAL ANALYSIS), MEMBRANES, WATER, VAPORS

Subject Categories : Industrial Chemistry and Chemical Processing
      Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE