Detection of extremely fine carbonaceous particles in the exhausts of diesel and spark-ignited inernal comnpbustion engines,by meqans of broad-band extinction and scattering spectroscopy in the ultraviolet band 190-400 NM

摘要

Recent stuides have shown that organic matter found in foine aerosol or smapled in flames cna be only parialy speciated,the majro part being unietified.Instrumental limitations of chemical analysis at very high molecular masses and of particle detectors at very ow sizes leave unexplored the nanometric size range,wher orgnaic molecular clusters might acumulate.