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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.

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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).

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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.