Overview
ISO 9096:2017 - "Stationary source emissions - Manual determination of mass concentration of particulate matter" - is a reference method for measuring particulate (dust) mass concentration in waste gases under standard conditions. The standard covers manual, filter-based sampling for concentrations from 20 mg/m³ to 1 000 mg/m³ and is specifically applicable for the calibration of automated monitoring systems (AMS). It notes that measurements can depend on filtration temperature when emissions contain unstable, reactive, or semi‑volatile substances, and that in‑stack methods may be preferable to out‑stack methods for AMS calibration.
Key Topics
- Scope and definitions: clear definitions of particulate matter and measurement limits.
- Sampling strategy: requirements for the sampling plane, selection and minimum number of sampling points, access ports, and sampling time to obtain a representative, integrated sample.
- Apparatus and materials: velocity/flowrate, temperature and pressure measurement devices, sampling nozzles, high‑volume sampling equipment, and materials for particulate recovery.
- Weighing and conditioning: procedures for pre‑weighed filters, drying/conditioning, weighing accuracy, and blank corrections.
- Sampling procedures: preparation, pre‑measurements, calculation of isokinetic nozzle diameter, sample collection, and recovery of upstream deposits.
- Validation and quality control: leak checks, isokinetic flowrate verification, deposits on non‑weighed parts, and overall validation criteria.
- Calculations: computation of isokinetic flowrate, dust concentration, and correction factors (oxygen and carbon dioxide corrections).
- Performance & reporting: performance characteristics, experimental sampling data, and required test report content.
- Annexes: proven nozzle designs, sampling point positioning (circular/rectangular ducts), weighing bias examples, isokinetic conditions, validation summaries, and access port examples.
Applications
ISO 9096:2017 is used by:
- Environmental laboratories conducting manual particulate sampling and gravimetric analysis.
- Industrial emissions teams at power plants, incinerators, cement works and manufacturing facilities for compliance testing.
- Regulatory agencies and auditors performing stack testing and enforcement.
- Instrument vendors and laboratories for AMS calibration and verification.
- Air quality and emissions consultants designing sampling programs and interpreting particulate mass concentrations.
Related Standards
- ISO 10780 (velocity and flowrate measurement in ducts) - referenced for flow measurement.
- ISO 5725 (accuracy of measurement methods) - referenced for trueness and precision.
- EN 13284‑1 - similar European method; ISO 9096 places additional emphasis on high‑volume sampling and AMS calibration.
Keywords: ISO 9096:2017, particulate matter, stationary source emissions, manual determination, mass concentration, isokinetic sampling, filter weighing, AMS calibration, in‑stack sampling.
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