Stability of Aqueous Ethanol Solutions Stored in Glass Ampules

    Volume 20, Issue 3 (July 1975)

    ISSN: 0022-1198

    CODEN: JFSOAD

    Published Online: 1 July 1975

    Page Count: 2


    Diamondstone, BI
    Analytical Chemists, Institute for Materials Research, National Bureau of Standards, Washington, D.C.,

    Pella, PA
    Analytical Chemists, Institute for Materials Research, National Bureau of Standards, Washington, D.C.,

    (Received 10 September 1974; accepted 20 November 1974)

    Abstract

    During our work on the development of performance standards for breath alcohol analyzers [1], it was necessary to prepare known concentrations of ethanol in distilled water for the purpose of measuring the performance capabilities of such instruments. In these studies we were concerned with the preservation of our reference ethanol solutions. For this reason we prepared a solution of known ethanol concentration and stored it in a number of flame-sealed, glass ampules. Some questions have been raised concerning the stability of ethanol solutions when stored in this manner [2]. We have measured the ethanol concentration by dichromate oxidimetry over a period of two years, and the results are reported in this paper.


    Paper ID: JFS10298J

    DOI: 10.1520/JFS10298J

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    Author
    Title Stability of Aqueous Ethanol Solutions Stored in Glass Ampules
    Symposium , 0000-00-00
    Committee E30