Overview
ISO 16000-25:2011 - "Indoor air - Part 25: Determination of the emission of semi-volatile organic compounds by building products - Micro‑chamber method" specifies a standardized laboratory test for measuring the area-specific emission rate (ASER) of semi-volatile organic compounds (SVOCs) from building products and furnishings using a micro‑chamber. The method is intended for newly produced products (and can, in principle, be applied to aged materials) under defined climate conditions. Typical test materials include board materials, wallpapers, flooring, insulation, adhesives, paints and combinations thereof.
Key topics and technical requirements
- Test principle: Quantify SVOC emissions from a prepared test specimen placed in a controlled micro‑chamber and calculate the ASER from collected sample masses over defined sampling periods. The method acknowledges that much SVOC is adsorbed onto chamber surfaces at ≤40 °C and uses a two‑step collection (including thermal desorption) to determine emissions.
- Micro‑chamber system: Requirements for chamber design, controlled conditions (temperature, humidity, air change rate), and air flow to achieve reproducible results. Examples of micro‑chambers and a recovery measurement method are given in informative annexes.
- Specimen handling: Sampling, transport, storage and specimen preparation follow ISO 16000‑11 to ensure representative test pieces.
- Air sampling & analysis: Analytical sampling procedures and laboratory analysis for SVOCs follow ISO 16000‑6 and ISO 16017‑1 (sorbent tube/thermal desorption/GC).
- Performance & QA/QC: Includes verification of test conditions, calculation of area‑specific emission rates, method performance characteristics and a normative annex on quality assurance/quality control (QA/QC).
- Definitions & symbols: Standardized terminology (air change rate, area specific air flow rate, recovery, field blanks) to support reproducible reporting.
Applications and users
ISO 16000-25 is used to:
- Provide manufacturers and product developers with emission data to reduce SVOC release and improve product formulations.
- Support builders, specifiers and material selectors assessing products for improved indoor air quality.
- Serve testing laboratories and certification bodies conducting emission testing for product labelling or compliance.
- Aid researchers and indoor‑air consultants characterizing potential long‑term contaminant sources in buildings.
Keywords: ISO 16000-25, micro‑chamber method, SVOC, semi‑volatile organic compounds, indoor air, area specific emission rate, building products, emission testing.
Related standards
- ISO 16000‑6 - VOC determination by Tenax TA/thermal desorption/GC
- ISO 16000‑11 - Sampling, storage and preparation of test specimens
- ISO 16017‑1 - Sampling and analysis of VOCs by sorbent tube/thermal desorption/GC
These related parts of the ISO 16000 series provide complementary procedures for specimen preparation, sampling and analytical techniques used with the micro‑chamber method.