Spectral signature of Egyptian crude oils

22nd International Conference on Spectral Line Shapes

Ghatass, Z.F.^1 ; Nashed, A.W.^2 ; Saleh, I.H.^1 ; Mohmed, M.M.^3

Department of Environmental Studies, Institute of Graduate Studies and Research, 163 Horrya Avenue, Shatby, Alexandria, Egypt^1

Department of Material Science, Institute of Graduate Studies and Research, Alexandria University, Egypt^2

Department of Biophysics, Medical Research Institute, Alexandria University, Egypt^3

关键词: Complex mixture;    Emission spectrums;    Emission wavelength;    Excitation wavelength;    Fluorescence emission spectra;    Fluorescent peak;    Spectral signature;    Three dimensions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/548/1/012059/pdf
DOI  :  10.1088/1742-6596/548/1/012059

来源: IOP

【 摘 要 】

Crude petroleum oils are complex mixtures of diverse hydrocarbons, in widely varying compositions, that originate from a variety of geological sources. Fluorescence emission spectra have been measured for two types of Egyptian crude petroleum oil, its light and heavy products over a broad range of excitation and emission wavelengths. Both types of crude oil products are characterized by spectral signatures with a differing topography: the number of fluorescent peaks, their coordinates (λex, λem) on the plane of the three dimensions spectrum, and the shape of the bands formed by the contour line density, changeable in either direction. The refined light oil shows emission spectra at λmaxbetween 350 and 500 nm according to the excitation wavelength. The refined heavy oil shows very broad unstructured emission spectra with λmax> 400 nm. As a group, they could certainly be distinguished from the light oil samples and most of the crude oil.