Volume 39, Issue 6 (November 1994)

    Collection of Fiber Evidence Using Water-Soluble Cellophane Tape

    (Received 4 February 1994; accepted 22 March 1994)

    CODEN: JFSOAD

      Format Pages Price  
    PDF Version 8 $25   ADD TO CART


    Abstract

    The collection and preservation of microtraces, such as fibers, using cellophane tape is generally accepted as being very practical and efficient. At the scene of a crime, for example, this means of sample collection is both easy and rapid, which explains in part its popularity. However, in addition to a very low specificity (high background), this technique suffers from one major disadvantage: the microtraces must undergo a long and tedious pretreatment before any detailed analysis is possible. This pretreatment involves the isolation and separation of the microtrace from the tape, followed by a solvent wash (usually with xylene) to remove all trace of the adhesive.

    A recently commercialized product alleviates some of the problems associated with sample collection by this means: “Mask Plus II” (No. 5414, Scotch™, St-Paul, MN) is a new cellophane tape that is completely soluble in water. Microtrace collection can be performed with this tape by the conventional lifting procedure. In the laboratory, the microtraces may then be conveniently released from the tape by immersion in warm water (60°C) with continual agitation. After solubilization of the cellophane tape, the microtraces are isolated by membrane filtration then allowed to air dry.

    The described technique has been thoroughly evaluated for fiber collection with comparison of the results with those obtained using conventional cellophane tape. Particular attention has been paid to operating conditions (temperature, humidity, conservation, etc.), collection efficiency, as well as possible alterations to the fibers themselves.


    Author Information:

    Lennard, C
    Student, Research Assistant, and Associate Professor, Institut de Police Scientifique et de Criminologie, University of Lausanne, UNIL-Bâtiment de Chimie, Lausanne-Dorigny,

    Roux, C
    Student, Research Assistant, and Associate Professor, Institut de Police Scientifique et de Criminologie, University of Lausanne, UNIL-Bâtiment de Chimie, Lausanne-Dorigny,

    Chable, J
    Student, Research Assistant, and Associate Professor, Institut de Police Scientifique et de Criminologie, University of Lausanne, UNIL-Bâtiment de Chimie, Lausanne-Dorigny,


    Stock #: JFS13739J

    ISSN: 0022-1198

    DOI: 10.1520/JFS13739J

    ASTM International
    is a member of CrossRef.

    Author
    Title Collection of Fiber Evidence Using Water-Soluble Cellophane Tape
    Symposium , 0000-00-00
    Committee E30