Overview
ISO 20999:2026 establishes a standardized method for determining the total amount of halogens-fluorine, chlorine, bromine, and iodine-in textile products using the combustion and ion chromatography (C-IC) method. Developed by ISO Technical Committee 38 (Textiles) in collaboration with CEN, this international standard is applicable to all combustible materials in textile products, including fibres, fabrics, plastic components (such as coatings), and wood. The purpose of ISO 20999:2026 is to provide a reliable, verifiable approach for analyzing potentially harmful halogen content in textiles, aiding regulatory compliance, quality assurance, and material characterization.
Key Topics
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Scope of Application
- Suited for all textile materials that are combustible, such as yarns, fabrics, plastics, and coated or wooden components.
- Measures the total concentration of all four main halogens: fluorine, chlorine, bromine, and iodine.
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Test Principle
- Test specimens are combusted under controlled high temperatures in an oxygen-rich atmosphere.
- The resulting hydrogen halide gases are captured in an absorption solution.
- Halogen content is quantitatively determined using ion chromatography.
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Preparation and Safety
- Samples must be homogeneously mixed and cut to standardized sizes for consistency.
- Laboratory personnel must use halogen-free materials and appropriate personal protective equipment to prevent contamination.
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Reporting
- Accurate documentation, including reference to ISO 20999:2026, sample identification, mass fractions of each halogen, deviations, and test date, is required.
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Limitations
- The method does not differentiate between organic and inorganic halogens.
- It cannot specifically identify or quantify perfluorinated and polyfluorinated alkyl substances (PFAS), but high halogen content can indicate their possible presence.
Applications
Related Standards
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ISO 3696 – Water for analytical laboratory use – Specification and test methods
- Essential for ensuring the purity of water used in the combustion and ion chromatography processes.
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Other Relevant ISO Textile Standards
- ISO 1833 (Quantitative chemical analysis of textile fibre mixtures)
- ISO 17075 (Leather – Chemical determination of chromium(VI) content)
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Regulatory Framework and Testing Guides
- Reference to legal requirements on halogens in textiles across various international markets.
- Utilized in conjunction with local or regional bans or thresholds on substances of concern in consumer goods.
ISO 20999:2026 serves as an essential tool for textile laboratories, regulatory bodies, manufacturers, and quality assurance professionals to ensure the safety, regulatory compliance, and marketability of textile products by reliably determining total halogen content through combustion and ion chromatography analysis.
Open preview (PDF)Textiles — Determination of total halogens in textile products — Combustion and ion chromatography (C-IC) method