Stationary combustion sources such as those burning coal, fuel oil, biomass, and waste are significant sources of combustion aerosols. Mobile sources from internal combustion engines burning gasoline and diesel are also a significant source of primary particles.
Combustion sources can generate small particles under 30nm and close to the source such particles may be present in high concentrations. Depending on the concentration, particles can agglomerate to form larger particle sizes. Time and size resolved measurements are therefore important in determining the nature of combustion generated aerosols.
Combustion particles can be important airborne pollutants, particularly in urban environments. To properly assess the impact on health and the general environment it is important to determine the presence of potentially hazardous chemicals in particulate matter. For example, some have been shown to contain bio available heavy metals, transition metals, polycyclic aromatic hydrocarbons, dioxins and other hazardous chemicals.
Depending on the source of particulate matter, and several physical and chemical processes which may vary over time and space, the distribution of chemicals can differ significantly across the size distribution of aerosol particles. The wide size range and size resolving capability of the Aero Select make it a perfect instrument for investigating and determining the chemical nature of combustion generated aerosols.
Products that are relevant for Combustion Aerosol Research:
The Aero Select is a wide-range sampler and is unique in that it spans the entire aerosol range from 2nm up to 20μm. Particles are collected simultaneously using both inertial deposition and diffusion, and separated into 12 size channels.
A companion product for the Aero Select, the MR250 is used to determine mass-size distributions quickly, eliminating the need for laboratory gravimetrical analysis. The mass reader uses the light scattering characteristics of aerosol particles to quantify the masses of samples taken with the Aero Select in the size range of 0.25 to 35µm.