In this paper, the characteristics of 2D correlation fluorescence spectrum of three pesticides (dicofol, carbofuran and fenvalerate) residue in tea are investigated. With different perturbation of excitation wavelength and concentration respectively, the cross-peaks and auto-correlation-peaks of 2D correlation fluorescence spectrum of dicofol are studied. Besides, with the same perturbation of concentration, the features of 2D correlation spectrum of carbofuran and fencalerate are researched. In addition, a series of statistical features of 2D correlation spectral image are discussed which indicating the distribution characteristics. In a word, all the characteristics of signal peaks and statistical features serve as a basis for identification of pesticide.
Keywords: 2D Correlation Fluorescence Spectroscopy; Spectral Characteristics; Dicofol; Carbofuran; Fenvalerate;