Overview
EN ISO 13144:2025 (CEN adoption of ISO 13144:2025) specifies an analytical method for the qualification and quantification of quinoline, isoquinoline and selected quinoline derivatives in textiles and dyestuff powders. The method uses methanol extraction followed by analysis with gas chromatography–mass spectrometry (GC‑MS/GC‑MS/MS) or liquid chromatography–mass spectrometry (LC‑MS/LC‑MS/MS). It is intended for natural and synthetic dyed fibres, fabrics and dyestuff powders used in dyeing and printing.
Key topics and technical requirements
- Scope & safety: Applies to textiles that may come into skin contact and to dyestuff powders; includes safety warning about hazardous reagents and equipment.
- Extraction principle: Ultrasonic methanol extraction of test specimens (document notes use of an ultrasonic water bath around 70 °C).
- Analytical techniques: Confirmatory and quantitative analysis by GC‑MS / GC‑MS/MS or LC‑MS / LC‑MS/MS.
- Target substances: Quinoline, isoquinoline and a defined list of methyl- and dimethyl-quinoline/isoquinoline derivatives.
- Sample prep:
- Homogeneous specimens, cut into small pieces (approx. 0.3–0.5 cm edges).
- White/undyed textile portions are assumed free of quinoline and normally excluded.
- Up to three single-colour specimens (same mass) may be combined for testing where appropriate.
- Standards & reagents: Stock standard solutions (e.g., 1 000 µg/ml in methanol) with light‑sensitive storage recommendations (brown bottle, ~6 °C); use of methanol, acetonitrile, ammonium acetate buffer and ISO‑grade water.
- Apparatus: Analytical balance (0.1 mg), PTFE 0.45 µm filters, chromatographic vials, and MS detectors.
- Quality assurance: Calibration curves, calculation procedures, method reliability and limits of quantification are defined in the document.
Applications and who uses it
- Laboratories: Textile testing labs and contract analytical services performing compliance testing.
- Manufacturers & dyers: Textile and dye producers for product safety control, incoming raw-material checks, and supplier monitoring.
- Brand owners & retailers: Due diligence and verification against restricted‑substance requirements.
- Regulators & certifiers: Enforcement or harmonized testing for restricted quinoline levels (quinoline is restricted in certain consumer textiles in the EU).
- Environmental & safety consultants: Assessing downstream risks from dye residues.
Related standards
- References analytical and laboratory practice standards cited in the document (e.g., ISO 3696 for laboratory water, ISO 4787 for volumetric instruments). For comprehensive compliance, use EN ISO 13144:2025 alongside applicable restricted‑substance regulations and textile testing standards.
Keywords: EN ISO 13144:2025, quinoline testing, isoquinoline, quinoline derivatives, textiles testing, methanol extraction, GC‑MS, LC‑MS, dye testing, textile safety.