The fluorescence of banana peel was analyzed. When the surface of the peel was irradiated by ultraviolet ray at 300 -400 nm, a blue fluorescence having a peak at 430 nm was observed. There has been a report that when a banana ripens, even more intense fluorescence is observed around the sugar spots and thus, the fluorescence can be used as an index of the ripeness. When the excitation and fluorescence wavelengths are unknown, the 3D spectrum is effective. F-7000 fluorophotometer, with the fastest scan speed for the instrument class, allows the high-throughput analysis of 3D fluorescence spectra.
