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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union
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Discussion papers | Copyright
https://doi.org/10.5194/amt-2018-301
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 18 Oct 2018

Research article | 18 Oct 2018

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Measurement Techniques (AMT).

Derivation of Flow Rate and Calibration Method for High-Volume Air Samplers

Richard Hann1 and Mark Hermanson2 Richard Hann and Mark Hermanson
  • 1Department of Cybernetics, Norwegian University of Science and Technology (NTNU), Trondheim, 7491, Norway
  • 2Hermanson & Associates LLC, Minneapolis, MN 55419, USA

Abstract. Sampling the atmosphere is different from other environmental matrices because measuring the volume of air sampled requires a mechanical flow-through device to draw the sample and measure its flow rate. The device used must have the capability of concentrating the analytes of interest onto a different substrate because the volumes of air needed are often in the hundreds of cubic meters. The use of high-volume air samplers has grown since 1967, when recommended limits of a larger number or organic contaminants in air were developed. The development of equations used for calculating the air flow through the device over time have similarly been developed. However, the complete derivation of those equations has never appeared in the scientific literature. Here a thorough derivation of those equations is provided with definitions of the mechanical systems that are used in the process, along with the method of calibrating and calculating air flow.

Richard Hann and Mark Hermanson
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Status: open (until 22 Dec 2018)
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Richard Hann and Mark Hermanson
Richard Hann and Mark Hermanson
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Short summary
High-volume air sampling is a key measurement technique to investigate the concentration of atmospheric pollutants. Although being a mature technique, a detailed description of how to derive flow rates and how to calibrate these samplers is missing in the literature. This paper uses basics in fluid mechanics to derive the equations in question. This allows for a deeper understanding of the measurement process and opens up for a more differentiated assessment of potential error sources.
High-volume air sampling is a key measurement technique to investigate the concentration of...
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