关键词: 酸化乳；黏度；稳定性；感官评价

Abstract: Acidified milk is deeply loved by consumers because of its delicate taste and unique flavor. However, acidified milk is unstable with respect to whey syneresis, protein precipitation and flocculation during both processing and storage. The synergistic effect of pectin with other stabilizer can stabilize acidified milk and improve its taste. This study investigated the effect of various gums on the viscosity, water-holding capacity, whey syneresis and sensory evaluation of acidified milk. It turned out that the acidified milk with added pectin, propylene glycol alginate (PGA) and carboxymethylcellulose sodium (CMC-Na) had moderate viscosity and good taste and was stable. The optimal mixing ratio of pectin, PGA and CMC-Na was found to be 13:2:2 for better viscosity and the best stability and 13:2:1 for the highest sensory score. The optimal mixing ratio was determined to be 13:2:2 for a better compromise between various response variables such as taste and stability during actual production.

Key words: acidified milk; viscosity; stability; sensory evaluation