Aerosol Emission Measurement
Aerosol Emission Measurement - Related Videos
09:38
Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies
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Cited by 4 •
2015
We describe the generation of far-infrared radiation using an optically pumped molecular laser along with the measurement of their frequencies with heterodyne techniques. The experimental system and techniques are demonstrated using difluoromethane (CH2F2) as the laser medium whose results include three new laser emissions and eight measured laser frequencies.
12:59
A System to Create Stable Nanoparticle Aerosols from Nanopowders
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Cited by 4 •
2016
We designed and developed an effective nanopowder aerosolization setup and operating protocol. The system generated nanoparticle aerosols with stable number concentrations and size distributions for long durations, requiring only small quantities of test material (min. 200 mg).
10:11
Whole-Body Nanoparticle Aerosol Inhalation Exposures
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Cited by 51 •
2013
A whole-body nanoparticle aerosol inhalation exposure facility was constructed for nano-sized titanium dioxide (TiO2) inhalation toxicology studies. This system provides nano-TiO2 aerosol test atmospheres that have: 1) a steady mass concentration; 2) a homogenous composition free of contaminants; and 3) a stable particle size distribution during aerosol generation.
09:34
Implementation of Portable Emissions Measurement Systems (PEMS) for the Real-driving Emissions (RDE) Regulation in Europe
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Cited by 43 •
2016
The European Commission has developed a Real-Driving Emissions (RDE) test procedure to verify pollutant emissions during real-world vehicle operation using the Portable Emissions Measurement Systems (PEMS). This paper presents the experimental procedures required by the newly-adopted RDE test.
07:47
Experimental Protocol to Investigate Particle Aerosolization of a Product Under Abrasion and Under Environmental Weathering
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2016
In this article, an experimental protocol to investigate particle aerosolization of a product under abrasion and under environmental weathering is presented. Results on the emission of engineered nanomaterials, in the form of aerosols are presented. The specific experimental set-up is described in detail.
FAQs
Representative sampling ensures that the collected air reflects the emission source rather than an unusual local condition. Controlled flow helps maintain a known sampling relationship between the air drawn and the particles captured or measured. This improves confidence when engineers compare sources, evaluate pollution controls, or use results to assess exposure and ventilation needs.
These methods provide different forms of particle information. Filter collection gathers particles for later analysis, while gravimetric analysis determines particle mass from the collected material. Optical particle counting measures concentration through optical detection, and aerodynamic sizing characterizes particle size using aerodynamic behavior. Selecting among them depends on whether the investigation requires mass, concentration, or size-distribution data.
Particle size distribution adds detail that a single concentration or mass value cannot provide. It helps characterize what an emission source releases and supports decisions about pollution control, ventilation, and filtration design. Aerodynamic sizing is particularly relevant when engineers need size-related information to evaluate equipment performance or understand how airborne particles are distributed.
Reliable results depend on drawing a representative sample at a controlled flow and matching the measurement method to the intended result. A procedure focused on mass should use an approach such as gravimetric analysis, whereas concentration or size distribution requires a corresponding measurement technique. These choices determine how effectively the data support compliance, equipment evaluation, or exposure assessment.
The workflow begins by drawing an air sample from the source under controlled flow conditions. Particles are then collected or measured using an appropriate approach, such as a filter, optical particle counter, or aerodynamic sizer. The resulting data are expressed as concentration, mass, or size distribution, allowing engineers to interpret emissions and assess control performance.
The equipment depends on the desired particle information. Filter-based collection supports subsequent gravimetric analysis, optical particle counting provides concentration measurements, and aerodynamic sizing supplies particle-size information. Together, these approaches form a practical toolkit for emissions monitoring and for evaluating ventilation, filtration, or other engineering systems intended to limit particulate release.
Engineers use these measurements to monitor emissions, check regulatory compliance, evaluate equipment, and guide ventilation or filtration design. The data also support pollution-control decisions by showing the characteristics of particles released from industrial processes, vehicles, products, or other sources. In this way, measurement connects source performance with practical exposure-reduction and control strategies.
Comparing measured particle concentration, mass, or size distribution across potential sources can provide evidence about where emissions originate. Those results help researchers and engineers evaluate technologies that limit particulate release and design controls for lower airborne exposure. The same evidence supports health-risk reduction by linking emission information with ventilation, filtration, and broader exposure-assessment decisions.