Analysis of Azo and Nitro polycyclic aromatic hydrocarbons in crude oils and fluorescence detection development for the TRACC* water concentrator


Briggs, Michael E.




Six crude oils were analyzed for nine nitrogen containing polycyclic aromatic hydrocarbons by column separation and MSD, Mass Selective Dectector. Carbazole was found in four oils at levels of 100's of yug/g and not at all in two other oils. The crude oils were deasphaltized and analyzed by the same method. The concentration of carbazole in all the oils increased by almost double. Methanol was used as a polar solvent to elute the polar compounds in oil. The carbazole standard eluted primarily in the 50% hexane/benzene fraction but in the oils, was present only in the methanol fraction. Hexane solutions of three oils were prepared in concentrations ranging from 10 ppm to 1000 ppm in order to develop a concentration-calibration curve for excitation and emission wavelengths of fluorescence. The fluorescence of carbazole was measured and occurs in the region of crude oil fluorescence. The TRACC material celite was evaluated for the retention and fluorescence of crude oils. The material absorbed the oil from the water solution and gave a fluorescence spectrum. The spectra intensity did not decrease with a decrease in oil concentration and the matrix for preparing the celite did not have an effect on the signal.


Azo Compounds
Nitro Compounds
Water -- Pollution
Fluorescence Spectroscopy
Nitroaromatic Compounds -- Toxicology
Oils And Fats -- Analysis




Carleton University

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Theses and Dissertations

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