Method for Quantitative Chemical Analysis of Mixtures of Polyester Fibres With Cotton or Regenerated Celluloseÿ- Part 2 : Trichloro Acetic Acid/Methylene Chlori

This standard establishes a specialized chemical testing procedure designed to determine the precise quantitative composition of mixed textile materials containing polyester fibers alongside cotton or regenerated cellulose fibers. The methodology described outlines a specific analytical approach utilizing a solvent system composed of trichloroacetic acid and dichloromethane. This particular technique serves as the second part of a broader series dedicated to the analysis of such fiber blends. The procedure provides detailed instructions for sample preparation, reagent handling, and the subsequent dissolution of cellulose components while leaving the polyester fraction intact for weighing and calculation. By following this protocol, laboratories can accurately assess the mass ratio between the synthetic and natural fiber constituents in a given textile sample. The document specifies the necessary equipment, safety precautions during the use of volatile solvents, and the calculation formulas required to derive the final percentage content. It aims to ensure consistency and reliability in laboratory results across different testing facilities engaged in the evaluation of composite textile products.