Abstract: In this paper, particle size distribution and centrifugal sedimentation rate of water-soluble soybean polysaccharide (SSPS), sodium carboxymethyl cellulose (CMC) and high ester pectin (HMP) in milk beverage were studied. The results showed that the acidic milk beverage system exhibited an increased stability when the concentrations of SSPS, CMC and HMP were higher than 0.3%. The best stability of the acidic milk system was achieved when HMP, SSPS and CMC were added at 0.3%, 0.5% and 0.5%, respectively. Meanwhile, particle size distribution analysis and centrifugal sedimentation rate analysis could provide the consistent results for the milk beverage system. Therefore, it is feasible to use particle size distribution and centrifugal sedimentation rate for quickly and accurately analyzing the amounts of added stabilizers in milk beverage.

Key words: particle size analysis, centrifugal sedimentation rate, stability, milk beverage