Microanalysis and Microscopy: Applications
PM Monitoring Support and Gravimetry
Determination of the mass concentration of particulate matter (PM) in ambient and indoor air is a vital first step in chemical speciation of airborne pollutants for exposure assessment, health effects research, and source apportionment. Gravimetric and chemical analysis of filter-based PM samples can also be critical to the NSR construction permitting process, including PSD monitoring.
We have controlled environment chambers for the conditioning and microgravimetric weight determinations necessary to fulfill stringent FRM requirements. Our scientists have supported client operators in both small monitoring projects and large networks, and routinely collaborate with clients to establish sample analysis protocols after mass determination, including ions analysis, elemental analysis by XRF, and trace metals analysis for air toxics.
Environmental scanning electron microscopy (ESEM) is capable of providing imaging and elemental analysis of PM particles. Much can be inferred about the particles by other analytical methods, but only ESEM has the capability and resolution to reveal the relative abundance of various types of particles and their actual morphology, size, degree of aggregation, and individual elemental composition.
Contact: Lisa Greene