Overview
ISO 16000-5:2007 - Indoor air: Sampling strategy for volatile organic compounds (VOCs) provides guidance for planning and organising measurements of VOCs in indoor environments. The standard emphasises that a well-designed sampling strategy is critical: poor planning can introduce more uncertainty than the analytical method itself and may affect decisions on remedial action. ISO 16000-5 links general sampling principles (ISO 16000-1) with analytical procedures such as ISO 16000-6 and the VOC sampling methods described in ISO 16017‑1/2.
Key topics and technical requirements
- Measurement objectives and environmental conditions: Define whether the aim is to measure single compounds, a subset of VOCs, or the full VOC profile. Environmental variables and boundary conditions must be recorded.
- VOC classification and sampling media: Uses WHO-based volatility classes (VVOC, VOC, SVOC, particulate organic matter) and lists commonly used sampling media (e.g., Tenax TA, activated carbon, molecular sieves, polyurethane foam (PUF), XAD-2, canisters).
- Measurement techniques:
- Short‑term (spot) measurements - sampling periods from less than one hour to a few hours; usually active sampling (pumped through sorbent).
- Long‑term measurements - typically passive/diffusive samplers providing time‑weighted averages over days to weeks.
- Sampling planning elements:
- Time of sampling, duration, sampling frequency, and sampling location must be selected to reflect emission profiles (continuous vs intermittent sources).
- Consideration of breakthrough volumes, flow rates (for active sampling), and the influence of occupants, activities and ventilation.
- Quality assurance and uncertainty: Present results with documented uncertainty and follow QA/QC procedures. Annex B provides a protocol for recording activities and boundary conditions during sampling.
- Annex A: Examples of organic chemicals frequently detected indoors.
Applications and users
ISO 16000-5 is practical for:
- Indoor air quality consultants and industrial hygienists planning VOC surveys
- Environmental laboratories and field technicians selecting sampling strategies
- Building managers, facility engineers and remediation contractors assessing indoor pollution and planning interventions
- Researchers and policy makers developing exposure assessments or indoor air guidelines
Typical applications include diagnostic surveys of homes, offices, schools, test chamber studies and pre/post‑remediation monitoring.
Related standards
Keywords: ISO 16000-5:2007, VOC sampling strategy, indoor air, volatile organic compounds, diffusive samplers, active sampling, Tenax TA, TVOC, indoor air quality.
