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Related Experiment Video

Updated: May 31, 2026

Collection and Extraction of Occupational Air Samples for Analysis of Fungal DNA

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Published on: May 2, 2018

How long to air sample? Practical considerations for short-term air sampling.

Alan L Justus¹

¹Los Alamos National Laboratory, Los Alamos, NM 87545, USA.

|June 29, 2011

Summary

Determining adequate sampling time for portable air samplers is crucial. The required duration depends on sampler flow rate, detector sensitivity, and target concentration for measurable results.

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Area of Science:

Environmental Science
Occupational Health
Analytical Chemistry

Background:

Transportable air samplers are utilized for both short-term and long-term environmental monitoring.
Assessing the adequacy of sampling duration is critical for short-term air sampling scenarios.

Purpose of the Study:

To establish a method for determining adequate sampling times for transportable air samplers.
To provide a basis for selecting appropriate sampling durations based on key parameters.

Main Methods:

The study focuses on the principle that sufficient activity must be measurable on the air filter post-sampling.
Equations are presented for calculating optimal sampling times.
Example calculations are provided for alpha counters.

Main Results:

The required sampling time is primarily dependent on the volumetric sampling rate, counter sensitivity, and the concentration level to be measured.
The presented equations and calculations offer a framework for selecting appropriate sampling durations.
The methodology is adaptable to various counting systems and sampling flow rates.

Conclusions:

Adequate sampling time ensures measurable results for accurate air quality assessment.
The developed methodology provides a practical approach for optimizing sampling strategies in environmental monitoring.
This work supports effective use of portable air samplers in diverse exposure assessment scenarios.