Abstract:  The particle size, distribution and stability of submicron β-carotene emulsion were studied with the laser granularity analyzer. The results showed that the diameter of submicron β-carotene emulsion is minuteness and the distribution is very uniformity. The range of particle size is 0.0507μm to 0.3393μm and the average size is 0.1420μm. After the observation in 6 months, the remarkable change of the particle size and distribution of submicron β-carotene emulsion did not arise. It was quite stable.

Key words: submicron； &beta, -carotene； emulsion； particle size and distribution； stability；