| Popis: |
This article describes the collection of organic compounds that emerge from the exhaust of diesel engines, the analysis of these compounds and the assessment of their sources. Unburned fuel and pyrosynthesis from fuel residues, together with lubricating oil passover, are the main sources that can be discerned. Of particular concern are the presence in the exhaust of hydrocarbons and polycyclic aromatic compounds (PAC) that, in some cases, cause cancer in mammals. A radio-chemical technique is described in which an individual PAC, labelled with 14 C, is added to the fuel and the radiochemical products collected in the exhaust of the engine. This method enables survival rates of PAC in the fuel to be accurately compiled by eliminating unlabelled interferences. |
