ISO 12219-11:2025

Overview

ISO 12219-11:2025 - Interior air of road vehicles, Part 11 - specifies a laboratory thermal desorption analysis method for characterizing organic emissions from non‑metallic materials used in motor vehicle interiors (textiles, carpets, adhesives, leather, plastics, films, paints, etc.). The method thermally extracts emissions from representative specimens, separates compounds by gas chromatography (GC) and identifies/detects them by mass spectrometry (MS) to provide semiquantitative sum values for volatile organic compounds (VOC value) and low‑volatile “fogging” compounds (FOG value), plus identification of individual substances.

Key SEO keywords: ISO 12219-11:2025, thermal desorption, interior air, VOC, FOG, gas chromatography, mass spectrometry, Tenax TA.

Key topics and technical requirements

• Scope and limitations
  • Evaluates outgassing from moulded non‑metallic parts under the specific test conditions in the document.
  • Results are not appropriate for estimating health effects or predicting in‑vehicle concentrations during driving or stationary conditions.
• Analytical approach
  • Thermal extraction of samples (VOC measurement example: heating at 90 °C for 30 min), TD → GC separation → MS detection.
  • Two semiquantitative sum values: VOC (toluene equivalent; detects up to n‑Pentacosane C25) and FOG (hexadecane equivalent; n‑alkanes C14–C32).
• Equipment and consumables
  • Directly coupled thermal desorption / GC system with a focusing device (cryofocusing/cold trap), MSD, inert desorption tubes (4–5 mm ID; Tenax TA recommended), fused‑silica capillary GC column (5% phenyl‑methyl‑siloxane, 30–60 m, 0.25–0.32 mm ID, phase 0.25–0.52 µm).
• Performance criteria
  • Check standard recoveries: 60–140% for single substances (VOC conditions); toluene recovery 80–120%.
  • Detection limits examples (95% CI): VOC run toluene < 0.04 µg, icosane (C20) < 0.06 µg; FOG run C32 < 0.2 µg.
• Quality control
  • System checks, calibration (calibration solutions and factors), chromatographic integration rules and reporting protocols are specified.

Practical applications and users

• Who uses it:
  • Automotive OEMs, material suppliers, independent test laboratories, quality engineers, and regulatory bodies concerned with vehicle interior air quality and fogging behavior.
• Use cases:
  • Material screening and selection, suppliers’ product qualification, comparative emission profiling of interior components, and pre‑compliance testing to reduce interior odour and condensation (“fogging”) risks.
• Benefits:
  • Provides reproducible, standardized TD‑GC‑MS data (VOC/FOG values and substance IDs) to inform design decisions and quality control.

Related standards

• ISO 12219 series (other parts for sampling, chamber tests, etc.)
• Normative reference: ISO 16000‑6 (determination of organic compounds in indoor/test chamber air)
• Sampling/storage: see ISO 12219‑8:2018 (clauses referenced for sampling and storage).

For implementation, consult the full ISO 12219-11:2025 text for exact procedures, annex examples, and reporting templates.