Method and apparatus for analyzing particulate matter in gas.

摘要

This invention provides a method for analyzing particulate matter in gas for analyzing simply and in high precision the particulate matter in an engine emission and an apparatus therefor by which dry soot, SOF and sulfate in PM contained in an engine emission can be fractionated individually even in a trifle amount, and a carbon differentiating and analyzing apparatus capable of differentiating and analyzing, with good precision, the organic carbon and the elemental carbon contained in a sample, and capable of performing a predetermined analysis with a high precision in a short time by reducing the period of time required for the analysis. This invention is constituted in such that a filter 2 which has caught PM contained in engine emission is placed in a heating furnace 1, and firstly, the filter 2 is heated at a predetermined temperature while passing an inert gas into the heating furnace 1 to evaporate the SOF and sulfate contained in PM, and the evaporated SOF is oxidized into CO 2 , and the evaporated sulfate is reduced into SO 2 . Thereafter, the filter 2 is heated while passing oxygen into the heating furnace 1 to oxidize the PM remaining on said filter 2 to have it generate CO 2 , and the CO 2 is analyzed with the gas analyzer unit 15.