Acta Agriculturae Zhejiangensis ›› 2021, Vol. 33 ›› Issue (12): 2406-2414.DOI: 10.3969/j.issn.1004-1524.2021.12.21

• Food Science • Previous Articles     Next Articles

Study on black chokeberry juicing processing and its quality evaluation

TANG Xiaoshua,b(), HU Boa,b, CHEN Xuemeia,b, ZHANG Baixia,b,*()   

  1. a. National Engineering Research Center for Functional Food, Jiangnan University, Wuxi 214000,China
    b. School of Food Science and Technology, Jiangnan University, Wuxi 214000,China
  • Received:2021-04-14 Online:2021-12-25 Published:2022-01-10
  • Contact: ZHANG Baixi

Abstract:

To optimize the process of juicing to prepare black chokeberry juices with strong stability, high antioxidant capacity and good sensory quality, the solid-liquid ratio and pectinase addition were optimized based on evaluation indicators of juice yield, soluble solid and precipitation rate. Total antioxidant activity, hydroxyl radical inhibition ability and DPPH scavenging ability of optimized juice were analyzed. Meanwhile, stability of black chokeberry juice under different storage conditions was studied in terms of color, content of total phenolics and anthocyanin, and antioxidant activity. Sensory evaluation of juice was carried out by fuzzy mathematics.The results reflected theoptimumprocess of black chokeberry juice was set as solid-liquid ratio of 1∶1 and addition of pectinase at 0.4%. Total antioxidant activity was 11.5 μmol·mL-1 and ability to inhibit hydroxyl radical was 17 610.3 U·mL-1 in black chokeberry juice. Content of vitamin C (VC) of black chokeberry juice was 10.00 mg·L-1.Contents of total phenolics and anthocyanin of black chokeberry juices were 6.8 mg·mL-1 and 0.7 mg·mL-1, respectively. And after being stored at 4 ℃ in dark for 120 d, juice was dark purple red, and contents of total phenolics, anthocyanins and antioxidant capacity showed no obvious decrease. The sensory evaluation was between excellent and good. The results showed that the prepared black chokeberry juice was of high antioxidant and stable as well as good sensory quality.

Key words: black chokeberry, juice yield, antioxidantability, stability, sensory evaluation

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