Hi,
I'm working on some textile dyes which are reactive azo in nature. Can anyone suggest me best solvent for extraction process to use it for further analytical methodologies like FTIR?
Hello,
a reactive dye by definition forms a covalent bond with the fiber, and consequently cannot be extracted. If you are interested in the amount of dye on the fiber or the identity of the dye, then it might in priciple be possible to reduce the azo bond, extract the liberated amine, and do a quailtative or quantitative analysis on it.
Success !
André Verhecken
Reactively dyed fibres can be digested to allow analysis of the dyes using thin layer chromatography, although how successful this would be for FTIR I don't know. This paper describes the method: K De Wael, K Van Dijck and F Gason, Discrimination of reactively-dyed cotton fibres with thin layer chromatography and UV microspectrophotometry, Science & Justice 55 (2015) p422-430.
there are several types of dye classes, therefore, each dye classes include these extraction solvents. In addition the nature of the textile material to which is fixed the dye (type bond) can also influence the choice of solvent.
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