<i>Errors Due to Anisokinetic Sampling of Aerosols</i>

Watson, H. H.

doi:10.1080/00968205409343956

Cited by 45 publications

(31 citation statements)

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“…Reference samplers, also called probe samplers, are used to determine the true concentration of aerosols in performance evaluations conducted in wind tunnels. A fair amount of research has been done on reference samplers including, Watson (1954), Badzioch (1959Badzioch ( , 1960, and Levin (1972, 1974). However, it was Belyaev and Levin's work that became the foundation for determination of the reference concentration.…”

Section: Introductionmentioning

confidence: 99%

Use of Numerical Calculations to Simulate the Sampling Efficiency Performance of a Personal Aerosol Sampler

Bird

2005

Aerosol Science and Technology

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Numerical calculations were conducted to simulate air and particle behavior near and into the inlet of an aerosol sampler in order to determine sampling efficiency performance. This was done with the pre-verified commercial computational fluid dynamics (CFD) software package, FLUENT (Fluent, Inc., Lebanon, NH, US). Air flow behavior was calculated for steady-state conditions approaching and flowing into 3D geometries of an aerosol sampler free in the air that was similar in dimension to two commercial samplers, namely the Gesamtstaubprobenahme sampler (GSP) and the conical inhalable sampler (CIS). Particle trajectories were calculated in a Lagrangian reference frame on the resulting velocity fields. Based on the particle trajectories, sampling efficiencies were calculated and compared to those reported in the literature for a CIS aerosol sampler. They were found to have similar overall trends for particle sizes up to 21 µm. Using a correction factor, agreement The findings and conclusions in this report are those of the author and do not necessarily represent the views of the Centers for Disease Control and Prevention or the National Institute for Occupational Safety and Health. Mention of a commercial product or trade name does not constitute endorsement by the Centers for Disease Control and Prevention or the National Institute for Occupational Safety and Health.Address correspondence to Aaron J. Bird, M/S 3030, Exposure Assessment Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, 1095 Willowdale Road, Morgantown, West Virginia 26505, USA. E-mail: ABird@cdc.gov was observed to be very good for smaller particles, but less so for larger particles.

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Section: Introductionmentioning

confidence: 99%

Use of Numerical Calculations to Simulate the Sampling Efficiency Performance of a Personal Aerosol Sampler

Bird

2005

Aerosol Science and Technology

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“…Miyake (1935) experimented with a heated platinum ribbon and separated dust particles from gas flow. The most successful cxpcriments were conducted by Green and Watson (1935) and Watson (1936). These studies enabled the construction of a thermal precipitator.…”

Section: Precipitatorsmentioning

confidence: 99%

Methods of Aerosol Measurement before the 1960s

Spurný¹

1998

Aerosol Science and Technology

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EICHFNWFG 6, D-57392 S< HMALL LPIRtR(r, GERMANY ABSTRACT. The time period before the 1960s can be described as the classical age of aerosol science and aerosol measurement. The measurement philosophy during this period was different from that of the period after the 1960s. Particle number concentration was considered the most important parameter. Optical microscopy was the determinative procedure for sample evaluation, for particle counting, and for size measurement. The most frequently used sampling methods were impaction and impingement, thermal and electrostatic precipitation, and filtration. Condensation samplers, as well a s manual condensation nuclei counters, were used also. Manual and simple light scattering and light absorption methods played a n already important role. Ultramicroscopy and nephelometry were commonly used methods. Elutriators and aerosol centrifuges were used for determining aerodynamic particle sizes, particle shape factors, and mass size distributions. Chemical aerosol analysis was in a developing state. Silica, silicates, and heavy metals were the most often detected dust and aerosol components. Titration, colorimetry, photometry, and polarography were the most commonly used analytical procedures. Practically no automatic or computer-supported measurement or analytical equipment was available a t this time. Sampling instruments often were made in the laboratory, rather than produced commercially.

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“…However, errors due to anisokinetic sampling of particles below 5 /* are negligible. 1 The probe, filter, and manifold were preheated prior to sampling. Once sampling was begun with the amber glass effluent, only intermittent auxiliary heating was needed to maintain the probe and filter in the temperature range of 350-400°F.…”

Section: Sampling Apparatus and Analytical Methodsmentioning

confidence: 99%

The Composition of Glass Furnace Emissions

Stockham

1971

Journal of the Air Pollution Control Association

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Errors Due to Anisokinetic Sampling of Aerosols

Cited by 45 publications

References 0 publications

Use of Numerical Calculations to Simulate the Sampling Efficiency Performance of a Personal Aerosol Sampler

Use of Numerical Calculations to Simulate the Sampling Efficiency Performance of a Personal Aerosol Sampler

Methods of Aerosol Measurement before the 1960s

The Composition of Glass Furnace Emissions

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