Filter Extraction Procedures and Results for Various EPA/ECTD (Environmental Protection Agency/Emission Control Technology Division) Particulate Samples

摘要

This report describes filter extractions and benzo (a) pyrene analyses performed for the Emission Control Technology Division of the Environmental Protection Agency. Pallflex filters measuring 20x20 inches were soxhlet-extracted in methylene chloride to remove organic soluble material. Some of the extracts were analyzed for benzo (a) pyrene, and some underwent Ames bioassay. Percent extractables and benzo (a) pyrene concentrations in the extracts are reported. Part of the effort also went into splitting and recombing extracts with the necessary extra drying and weighing steps.