EN ISO 22818:2021 PDF

Overview

EN ISO 22818:2021 specifies a chromatographic method for the determination of short-chain chlorinated paraffins (SCCP, C10–C13) and middle-chain chlorinated paraffins (MCCP, C14–C17) in textile products. The method targets a range of textile matrices - especially polymers in coated fabrics, polymer-based prints and polymer buttons (e.g., PVC) - using solvent extraction followed by gas chromatography negative ion chemical ionization mass spectrometry (GC‑NCI‑MS). The standard provides a reproducible procedure and defined calibration approach for comparable SCCP and MCCP results.

Key Topics and Requirements

• Scope and targets: SCCPs (C10–C13) and MCCPs (C14–C17) in textile articles.
• Sample preparation: Solvent extraction (toluene indicated in the method) and sulfuric acid clean-up to remove interferences prior to analysis.
• Analytical technique: GC‑NCI‑MS with a defined calibration standard; the method uses multiple ion traces (four for SCCP and four for MCCP) to address complex mixtures.
• Calibration: Calibration uses typical chlorination degrees of technical mixtures (SCCP ~59% Cl; MCCP ~55% Cl) to improve comparability.
• Expression of results and QA: Procedures for calibration, evaluation, recovery determination of internal standards, interference checks and reporting of results are included.
• Regulatory context: SCCPs are listed under the Stockholm Convention and are restricted in the EU (REGULATION (EU) 2019/1021); the standard supports compliance testing (articles with SCCP