Abstract:Carrot juice samples stored for 0，6，and 12 months were compared in terms of color parameters，Zeta potential，particle size，rheological properties，and stability. Thus the effects of storage period on the quality changes of carrot juice were evaluated. The results showed that there was no significant difference in the brightness （L*） value among the carrot juice samples stored for different time periods （P＞0.05），while the redgreen （a*） value and yellow-blue （b*） value decreased over time （P＜0.05）. There were significant differences in Zeta potential （P＜0.05）. The carrot juice systems stored for 0 and 6 months were stable，while the Zeta potential dropped sharply at 12 months，indicating that the system was extremely unstable. The particle size was larger in the sample stored for 0 month，decreased and presented a narrow peak in the sample stored for 6 months，increased again and presented a wider peak in the sample stored for 12 months. Under the same storage period，as the shear rate increased，carrot juice showed decreased viscosity and increased shear stress.As the storage period prolonged，viscosity，shear stress，storage modulus，and loss modulus all decreased. Carrot juice stored for 0 month had a low clarity index and concentrated transmittance distribution. After storage for 6 months，the clarity index increased while the transmittance fluctuated. After 12 months，the clarity index was the highest，and the trough of transmittance widened. Multiple indicators synergistically reflected the deterioration intensified of the carrot juice system over storage time.