The Extraction and Classification of Dyes from Cellulose Acetate Fibres

Pharmaceuticals and related drugs

“…The results of this study show that the proper selection of TLC solvent systems produces a tool of very high discrimination power for the analysis of dyed textile fibers (391). Beattie et al (392) have described a simple procedure for the extraction and classification of dyes from 1 to 2 cm lengths of acetate and triacetate fibers. Similarly, TLC systems for the characterization of disperse, acidic and basic dyes extracted from polyester, nylon, and polyacrylonitrile fibers were evaluated and recommendations made regarding the selection of TLC systems for each dye class (393).…”

Analysis of dyes using chromatography

“…A number of different extraction schemes utilising a variety of solvents have been proposed. (Beattie et al, 1981a, Beattie et al, 1979, Beattie et al, 1981b, Cheng et al, 1991, Hartshorne and Laing, 1984, Home and Dudley, 1981, Laing et al, 1991, Laing et al, 1990, Macrae and Smalldon, 1979, Resua, 1980, West, 1981, Wiggins, 1999 These schemes vary in detail, but have essentially the same goal of using a sequence of extractions, which not only provide an extract of the dye but can also be used to classify the dye. A comprehensive approach is that developed by the Forensic Science Service in the United Kingdom which involves different solvent sequences depending on the identity of the fibre, which had been established by microscopy and/or infrared spectrophotometry.…”