Volume 24, Issue 2 (April 1979)

    A Liquid Gradient Density Screening System for Soil Sample Identification Studies Using a Minicomputer

    (Received 5 July 1978; accepted 28 September 1978)

    Published Online: April

    CODEN: JFSOAD

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    Abstract

    The use of density gradient systems for the identification and comparison of soil samples is a well-recognized procedure [1,2]. In the usual manual method, liquid from a series of mixtures consisting of various ratios of high and low density liquids, such as 1,1,2,2-tetrabromoethane and bromobenzene, is added to a glass tube positioned vertically in a stand having a ruled background. The liquid is added up to each line and two or more identical tubes are prepared for comparison of the unknown against the reference material. A simple 8- to 10-step gradient is usually sufficient to obtain a usable resolution for most soil samples.


    Author Information:

    Harbin, DN
    Chemists, University of Missouri-Kansas City,

    Covey, EL
    Criminalists, Regional Criminalistics Laboratory, Independence, Mo.

    Howell, GR
    Criminalists, Regional Criminalistics Laboratory, Independence, Mo.

    Lott, JW
    Chemists, University of Missouri-Kansas City,

    Lott, PF
    Chemists, University of Missouri-Kansas City,


    Stock #: JFS10860J

    ISSN: 0022-1198

    DOI: 10.1520/JFS10860J

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    Title A Liquid Gradient Density Screening System for Soil Sample Identification Studies Using a Minicomputer
    Symposium , 0000-00-00
    Committee E30