ISSN: 0022-1198
CODEN: JFSCA
Published Online: 1 January 1980
Page Count: 6

A Semi-Micro Technique for the Extraction and Comparison of Dyes in Textile Fibers
Resua, R
Criminalist,

(Received 7 March 1979; accepted 30 May 1979)

Abstract

Solid dye samples and extracted dyes from semi-micro samples of textile fibers are separated by using thin-layer chromatography. The extraction process is nondestructive, leaving the fibers intact for further analysis or court presentation. Acid, basic, disperse, vat, direct, and reactive dyes are used in this study. No single solvent system was found that would successfully separate all of these usage classes of dyes, necessitating the introduction of a screening solvent system. The behavior of the dyes in the screening solvent system gives the criminalist an indication of the usage class of dye being examined. Subsequent separation of the dyes is then carried out in appropriate solvent systems. The procedure is a general one that has been used successfully on a variety of natural and synthetic fibers.

Keywords:
criminalistics, fibers, dyes

Paper ID: JFS10953J
DOI: 10.1520/JFS10953J
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