TRAC
Time-Resolved Aerosol Collector

The Time-Resolved Aerosol Collector (TRAC) is an airborne aerosol sampler developed by the Environmental Molecular Sciences Laboratory (EMSL) at the Pacific Northwest National Laboratory (PNNL). It collects atmospheric samples and deposits aerosol particles onto individual carbon films for laboratory-based Computer-Controlled Scanning Electron Microscopy/Energy-Dispersive X-ray (CCSEM/EDX) single-particle analysis. It collects samples at sequential time intervals as short as 1 minute. Purdue University operates an upgraded version of TRAC on its Airborne Laboratory for Atmospheric Research (ALAR) aircraft.