Identification and concentration measurement of petroleum in water based on micelle sensitization fluorescence method

In this paper, adopting the micellar fluorometry sensitization method, taking sodium dodecyl sulfate, a kind of surfactant, as the fluorescence sensitizing reagent, the fluorescence emission spectra of different oil samples in the micellar solution environment are measured. The concentration of the oil sample in the micellar solution has good linear relationship with its fluorescence peak intensity in a certain range, which can be used to solve the problem of the low water solubility of petroleum substances and the difficulty in accurately determining their concentration. The mixed solution sample set with known concentration is obtained by mixing the micellar solutions of diesel and kerosene samples in the linear range. The fluorescence spectra of different samples are measured and a three dimensional data matrix is constructed by measuring the fluorescence spectra of different samples. The parallel factor analysis method is adopted to accurately estimate the concentrations of diesel and kerosene of the samples in the prediction set through choosing appropriate factor. Experiment results indicate that the parallel factor (PARAFAC) analysis method can overcome the influences of the similarity and overlap of the fluorescence spectra of various petroleum substances in a certain extent and realize the overall qualitative and quantitative measurement of the petroleum substances in mixed micelles.