Overview
ISO 16000-15:2008 - "Indoor air - Part 15: Sampling strategy for nitrogen dioxide (NO2)" provides guidance for planning and executing indoor nitrogen dioxide (NO2) measurements. It links general sampling principles from ISO 16000-1 to the specific analytical and practical choices needed for NO2 sampling. The standard emphasizes that careful sampling strategy design is essential because measurement results can determine remedial actions and influence health assessments.
Key topics and technical requirements
- Measurement objectives and boundary conditions: Define purpose (screening, compliance, source identification, remediation verification) and environmental constraints before sampling.
- Measurement timing and frequency: Guidance on selecting measurement time, sampling periods and frequency to capture short-term peaks or long-term averages.
- Short-term vs long-term methods:
- Short-term measurements (up to ~1 hour): continuous monitors with high time resolution (e.g., chemiluminescence), or active manual sampling methods.
- Long-term measurements: often use diffusive samplers; analytical procedures are similar to those for manual methods.
- Pre-testing and screening: Use indicator tubes or short screening tests to assess feasibility and expected concentration ranges before full campaigns (Annex B provides examples).
- Measurement location: Position samplers to represent the exposure scenario and account for sources, ventilation and occupant habits.
- Measurement uncertainty and result presentation: Quantify uncertainties and report results with context (sampling period, method, QA).
- Quality assurance: Implement QA/QC procedures, calibration and method validation; Annex A provides information on diffusive samplers.
- Techniques referenced: chemiluminescence, sorbent sampling, diffusive samplers; the standard also encourages exploring newer sensor technologies (e.g., amperometric sensors) where appropriate.
Practical applications and users
ISO 16000-15 is used for:
- Assessing indoor air quality in homes, offices, public buildings, schools and vehicle cabins.
- Designing monitoring programs for suspected NO2 sources (heating, cooking, unflued appliances, tobacco smoke).
- Supporting remediation planning and verifying the effectiveness of interventions (ventilation upgrades, appliance replacement).
- Exposure assessment for occupational hygiene or public health investigations.
Typical users:
- Indoor air quality consultants and environmental engineers
- Building services/HVAC professionals
- Public health agencies and environmental regulators
- Laboratory analysts and researchers conducting NO2 monitoring campaigns
Related standards
- ISO 16000-1: General aspects of sampling strategy (prerequisite)
- Other parts of ISO 16000 series (e.g., parts on formaldehyde, VOCs, moulds) for broader indoor air assessments
- Standards for analytical methods and continuous monitoring (e.g., chemiluminescence methods referenced in the document)
Keywords: ISO 16000-15:2008, NO2 sampling strategy, indoor air, nitrogen dioxide, diffusive samplers, short-term measurements, measurement planning, QA/QC.
