Fluorescence spectra and fluorescence quantum yield of aurintricarboxylic acid (TAT) were studied fro the first time. It was found that TAT solution with pH 3～12 produced fluorescence when irradiated with ultraviolet rays. The maximum excitation wavelength and the maximum emission wavelength are 297 nm and 409nm, respectively. An excellent linear relationship between fluorescence intensity and ATA concentration was observed. The linear range is 0. 01～3μg/mL, and the detection limit is 0.01μg/mL. Using quinine bisulphate as a reference, fluorescence quantum yield of ATA was measured to be 0.16.

Key words: ALUMINON, FLUOROSPECTROPHOTOMETRY, QUININE