Abstract：In the spectral investigation of crude oil samples, it has been found that the synchronous fluorescence spectra (SFS) of the crude oil sample varied with the concentration in both the intensity and the location of peaks. Considering the information about both the changes in SFS, a new method for the concentration determination of crude oil sample using three-dimensional synchronous fluorescence was developed and introduced in the present paper. A number of samples have been investigated to verify the feasibility of the method. The concentration of each sample has been determined with a deviation under 3% in the concentration range from 10-4 to 1.0 g·L-1. All the results suggest that the newly developed method may become an useful means in petroleum logging.
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