One of the most obvious forms of particle buildup in a home or business is caused by the deposition of dark, or black particles.  These dark deposits are often a cause of concern.  Dark deposits can contain soot or other combustion products that have built up in a home. Soot can come from several sources.  Industrial soot such as those from power plants or large buildings may be infiltrating the environment.  Alternately, soot created by a building’s heating system might be recirculated.  MicroVision Laboratories’ comprehensive soot analysis allows for the detection of soot particulate via a combination of microscopy techniques including light microscopy, Scanning Electron Microscopy (SEM), and Energy Dispersive Spectroscopy (EDS).