Determination of nitrogen compound distribution from three source fuels

As part of a world-wide survey of middle distillate fuel instability, three fuels were chosen for detailed GC/MS analysis. These fuels are identified by number and country of origin; FL-2577 was from Burnaby, British Columbia , Canada; FL-2599 was from Abamadj, Kuwait; and FL 2592 was from Chiba, Jap an. The organonitrogen compounds in the three fuels were separated by mild acid extraction followed by silica gel absorption. This treatment yielded t hree fractions for each fuel; a basic nitrogen compounds fraction, BNC; a n on-basic nitrogen compounds fraction in methylene chloride, mel, NBNC-mcl; and a non-basic nitrogen compounds fraction in methanol, meoh, NBNC-meoh. T he three fractions from each fuel were analyzed by combined capillary gc/ms . The organo-nitrogen compounds from each fraction were identified and quan titated.