SCOCEC

The Sunset Laboratory Semi-Continuous OCEC Instrument has the capability of collecting particulate samples and analyzing them on a selected time period. Typically for urban areas, this is one hour. But the collection periods can be easily modified to two hours (or more) for areas that expect less concentrations of OCEC. In some locations, even shorter time periods may be needed such as urban Delhi, India, or during prairie or forest fire plumes.

With only short time periods for filter collection, this instrument can run for many weeks or months. The instrument analysis contains an internal calibration with each analysis to assure proper quantification of each carbon species.

In addition to determining EC (Black Elemental Carbon) by the Thermal-Optical Method, an additional independent determination of EC is done by measuring the change of absorbance on the collection filter during collection periods. This is compared to the Thermal/Optical measurement of EC to also serve as a QA check.

A final report listing the OC/EC concentrations, including time-variable plots of both, will be included with the final report. Any other supporting data will also be included.

Timeline

Campaign Data Sets