cyclodextrin(β-CD), a kind of cyclic oligosaccharides, was found to possess a strong inclusion ability with β-carotene. The inclusion compounds of β-CD with β-carotene were prepared by the coprecipitation method, and studied by UV-Vis spectra of different mole ratio β-CD/β-carotene in the H 2O+ethanol solution (H 2O for β-CD, and ethanol for β-carotene). Equilibrium constant of inclusion compound was determined by UV-Vis spectra. The results indicate that 3.25 moles of β-CD can include one mole...