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Design and validation of a high-flow personal sampler for PM2.5
H S Adams1, L C Kenny, M J Nieuwenhuijsen
1lmperial College of Science Technology and Medicine, T.H. Huxley School of Environment, Earth Sciences and Engineering, London, UK. helen.adams@ic.ac.uk
Journal of Exposure Analysis and Environmental Epidemiology
|March 15, 2001
Summary
A new high-flow personal sampler (HFPS) effectively collects fine particulate matter (PM2.5) using a lightweight foam filter. This validated sampler enables short-term personal exposure monitoring for urban commuters.
Area of Science:
- Environmental Science
- Analytical Chemistry
- Occupational Health
Background:
- Personal sampling for airborne particulate matter is crucial for exposure assessment.
- Conventional personal samplers often require long sampling durations (e.g., 24 hours).
- There is a need for efficient, low-cost samplers suitable for short-term personal exposure monitoring in diverse environments.
Purpose of the Study:
- To develop and characterize a novel high-flow personal sampler (HFPS) for airborne particulate matter.
- To evaluate the performance of the HFPS, specifically its size-selective performance for PM2.5.
- To validate the HFPS against established methods for personal air sampling.
Main Methods:
- Development of a gravimetric instrument utilizing porous polyurethane foam for size selection (PM2.5 cut point).
- Characterization using a TSI aerodynamic particle sizer (APS) and validation against U.S. EPA Federal Reference PM2.5 WINS and KTL cyclone.
- Application of an oil coating to the foam to prevent particle penetration.
Main Results:
- The final HFPS design achieved a 50% penetration diameter (d50) of 2.4 microm at a flow rate of 16 L/min.
- Co-located tests demonstrated good agreement between the HFPS and established samplers.
- Parallel testing showed excellent agreement between paired HFPS samplers, confirming reproducibility.
Conclusions:
- The developed high-flow personal sampler (HFPS) is a low-cost, lightweight, and effective instrument for collecting PM2.5.
- The HFPS is suitable for short-term personal exposure monitoring, particularly for urban transport users.
- The validated performance of the HFPS supports its use in occupational and environmental exposure studies.
