Overview
EN ISO 1833-13:2019 is an international standard specifying a quantitative chemical analysis method for textiles. It focuses on determining the mass percentage of chlorofibres in textile mixtures using a carbon disulfide and acetone solvent extraction technique. This method applies after removing non-fibrous matter and is suitable for mixtures of certain chlorofibres with a wide range of other fibres including wool, silk, cotton, viscose, polyamide, polyester, acrylic, glass fibres, and more.
Developed by ISO/TC 38 in collaboration with CEN, the standard ensures accurate and reproducible chemical analysis results essential for textile quality control and compliance in global markets.
Key Topics
- Scope and applicability: Method applies to textiles containing chlorofibres mixed with natural fibers (wool, silk, cotton, animal hair), regenerated fibers (viscose, cupro, modal, lyocell), synthetics (polyamide, polyester, polypropylene, acrylic), and glass fibres.
- Chemical principle: Chlorofibres are dissolved selectively using an azeotropic mixture of carbon disulfide and acetone, leaving other fibres undissolved.
- Test procedure:
- Specimen is extracted with carbon disulfide/acetone in a mechanical shaker.
- Extracted chlorofibre residue is filtered, washed with ethanol and water, dried, and weighed.
- Percentage mass is calculated by the difference in specimen mass pre- and post-extraction.
- Reagents and apparatus: Requires specific solvents, glassware (conical flask, watch-glass), and mechanical shaker compliant with ISO 1833-1.
- Precision: Confidence limits of results have a ±1 percentage point accuracy at 95% confidence.
- Safety: Handling carbon disulfide demands strict safety precautions due to its toxicity.
Applications
- Textile quality control: Precise quantification of chlorofibre content allows manufacturers and laboratories to verify fabric composition claims and meet regulatory or customer requirements.
- Material compliance testing: Ensures textile products containing chlorofibres meet defined chemical and performance standards before market release.
- Research and development: Supports fibre blend optimization by accurately assessing component percentages in experimental textiles.
- Customs and trade: Facilitates customs inspection and trade compliance by providing recognized quantitative evidence of fibre content.
- Environmental assessment: Helps identify chlorofibre proportions in textiles relevant for recycling and waste management processes.
Related Standards
- ISO 1833-1: General principles for quantitative chemical analysis of textiles.
- ISO 1833-4: Method for mixtures of certain protein fibres (e.g., wool, silk) with other fibres using hypochlorite.
- ISO 1833-7: Analysis of polyamide mixtures by applying formic acid extraction.
- ISO 1833-17: Alternative test method for chlorofibres in cellulose fibre blends using concentrated sulfuric acid.
- ISO 1833-21: Method using cyclohexanone for mixtures of chlorofibres with modacrylics, elastanes, acetates, and triacetates.
Keywords: EN ISO 1833-13, textile chemical analysis, chlorofibres quantification, carbon disulfide acetone method, fibre composition testing, textile standards, quantitative chemical textile analysis, fibre blend analysis, textile quality control, chemical solvent extraction textiles.