Overview - ISO/TR 17881-3:2018 (Chlorinated paraffin flame retardants)
ISO/TR 17881-3:2018 provides a laboratory method for the determination of short‑chain chlorinated paraffins (SCCPs, C10–C13) in textiles. The Technical Report specifies a workflow that combines ultrasonic extraction, purification, pretesting by GC‑ECD and quantification by a carbon‑skeleton reaction gas chromatography with flame ionization detection (GC‑FID). It is applicable to all kinds of textile products and is part of the ISO 17881 series on flame retardant determination.
Key topics and technical requirements
- Analytes and scope: Short‑chain chlorinated paraffins (C10–C13; SCCPs) used as flame retardants in textiles.
- Extraction: Ultrasonic extraction using n‑hexane/acetone (1:1), typically from a representative ~1.00 g specimen, with duplicate extracts and blank control.
- Purification: Solid phase extraction (Florisil® SPE) and concentration prior to analysis.
- Pretesting: GC‑ECD is used for screening; if characteristic SCCP peaks appear the sample proceeds to GC‑FID quantification.
- Quantification principle: SCCPs are chemically dechlorinated (carbon‑skeleton reaction) using hydrogen over a PdCl2 catalyst to form straight‑chain alkanes (C10–C13), which are measured by GC‑FID using an external standard method.
- Calibration and controls: Reference SCCP standards with different chlorine contents (51.5 %, 55.5 %, 63 %) and straight‑chain alkane standards are used to build calibration curves. Transformation efficiency must be checked (r ≥ 80 %). Reaction injection liners contain PdCl2 catalyst and defined packing.
- Performance: Detection limit for the GC‑ECD or GC‑FID procedure is specified as 20 mg/kg.
- Reporting: Test report must reference ISO/TR 17881-3:2018 and include sample ID, SCCP chlorination degree used, measured quantity, and any procedural deviations.
Applications and who uses this standard
- Textile testing laboratories performing regulatory compliance testing or product safety verification for flame retardant content.
- Manufacturers and suppliers of textiles who need to verify SCCP levels in incoming materials or finished products.
- Regulatory bodies and conformity assessment organizations setting or enforcing chemical restrictions in textiles.
- Importers/retailers requiring documented test methods to support product safety claims.
This method supports consistent screening and quantification of SCCPs to manage chemical safety, supply‑chain compliance, and regulatory reporting.
Related standards
- ISO/TR 17881 series - other parts of this series cover determination of certain flame retardants in textiles (see the ISO website for a list of parts).