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 chara cterization of motor oils like diesel, petrol, kerosene and lubricant oil ( 2T oil). Heavy oil like diesel and 2T oil contain mostly higher membered po lycyclic aromatic compounds, whereas lighter oils like petrol and kerosene contain intermediate polycyclic aromatic compounds along with their lower m embered aromatics. Analysis of synthetic mixture of diesel and kerosene has been carried out to check contamination of diesel qualitatively by kerosen e. A multivariate method to estimate kerosene and diesel in their mixture c omprising their dilute solutions has been used, which gives a satisfactory result. Estimation of 2T oil (0-10%, v/v) in petrol has been successfully c arried out using this technique.