Characterization and investigation of polycyclic aromatic compounds present in petrol, diesel, kerosene and 2T oil using excitation emission matrix fluorescence

Excitation emission matrix fluorescence fingerprint has been used for characterization of motor oils like diesel, petrol, kerosene and lubricant oil (2T oil). Heavy oil like diesel and 2T oil contain mostly higher membered polycyclic aromatic compounds, whereas lighter oils like petrol and kerosene contain intermediate polycyclic aromatic compounds along with their lower membered aromatics. Analysis of synthetic mixture of diesel and kerosene has been carried out to check contamination of diesel qualitatively by kerosene. A multivariate method to estimate kerosene and diesel in their mixture comprising their dilute solutions has been used, which gives a satisfactory result. Estimation of 2T oil (0-10%, v/v) in petrol has been successfully carried out using this technique.