Abstract: Based on studies of the characteristics of three dimensional spectra of different species of capsicums, the threedimensional spectra fingerprints of capsicum and capsaicinoid standard were established for the first time. Research shows,different species of capsicum own their own characteristic peaks, at the same time, the fluorescence peak of capsaicinoid standardswas found. These evidences can be provided for distinguishing different kinds of capsicum and measuring the contents ofcapsaicinoids.

Key words: capsaicinoid, fluorescence