Study of diesel fuel contamination by excitation emission matrix spectral subtraction fluorescence

Study on diesel fuel contamination by various common adulterants like kerosene, blue marked kerosene (PDS), crude hexane, cyclohexane, turpentine oil, etc. has been carried out by excitation emission matrix fluorescence (EEMF). Excitation emission matrix spectral subtraction (EEMSS) fluorescence can be obtained by subtracting the EEMF spectrum of the adulterated sample from the reference neat sample. It was observed that EEMSS fluorescence could help to distinguish between neat and contaminated sample of diesel despite the presence of energy transfer and inner filter effects. Calibration graph obtained from the spectral volume using EEMSS fluorescence is found to be efficacious in the whole range 0-90% v/v of various adulterants present in diesel. © 2002 Elsevier Science B.V. All rights reserved.