Chemical Analysis
Chemical analysis of damage to textiles is a broad subject and involves extensive knowledge of chemical testing methods. Technological faults due to using mistaken material or caused by foreign fibres can often be most simply clarified by chemical identification of the fibres. In practical damage analysis, physical methods are often combined with chemical analysis, for example microscopic staining, swelling and dissolution reactions or colour reactions and derivatization in chromatography. IR spectroscopy, a physical method, requires chemical knowledge for the identification of fibres, textile auxiliaries and stains.
Chemical analysis is popularly carried out to determine the extent of acid to cellulosics, nylon, polyester and other fibres. Detection of acid damage with Fehling’s solution is very common in case of cellulosic fibres, which are sensitive to acids and can be easily damaged by the acid catalysts used in easy-care, silicone, fluorocarbon and flame-retardant finishes as well as by drops of concentrated acid or faulty dyeing of cellulose/wool blends. Further, chemical analysis includes determination of the extent of molecular damage to fibres, damages caused by chemical weak spots, hydrolytic degradation, analysis of unwanted deposits on textiles, presence of oil, grease, paraffin and wax deposits, analysis of solvent extracts, etc. It is also used for end group analysis and determination of critical dissolution time, etc.
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With Regards,
Anna D Parker
Editorial Assistant
Journal of pharmaceutica Analytica Acta