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Chinese Agricultural Science Bulletin ›› 2023, Vol. 39 ›› Issue (16): 124-130.doi: 10.11924/j.issn.1000-6850.casb2022-0392

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Dendrobium officinale Beverage: Sterilization Process and Quality Analysis

WANG Zaihua1(), YE Guangying1, ZENG Canbiao1, YE Qingsheng2, HUANG Xiuhong2()   

  1. 1 Environmental Horticulture Research Institute, Guangdong Academy of Agricultural Sciences/Guangdong Provincial Key Lab of Ornamental Plant Germplasm Innovation and Utilization, Guangzhou 510640
    2 School of Life Sciences, South China Normal University, Guangzhou 510631
  • Received:2022-05-13 Revised:2022-09-13 Online:2023-06-05 Published:2023-05-22

Abstract:

In this study, 6 kinds of sterilization methods of Dendrobium officinale beverages were screened through different high-temperature and high-pressure conditions and the addition of antibacterial agents. Among them, 3 sterilization methods [M3 (121℃ for 15 min), M5 (0.2 g/kg Nisin+100℃) and M7 (100℃+0.25 g/kg DMDC+ 0.2 g/kg Nisin)] were studied in focus. Changes of the total number of bacterial colonies, polysaccharide content, total phenols content, and color stability of D. officinale beverages during the storage were studied to select better sterilization methods. Results showed that the total number of bacterial colonies in D. officinale beverages treated by the 3 sterilization methods under the storage of 25℃ and 16 weeks conformed to the National Food Safety Standard for Beverages (GB 7101—2022). In addition, the polysaccharide content of these beverages decreased significantly, the total polyphenol content changed smoothly, the L value, a absolute value and b value of the samples decreased, the color stability of the beverages during the storage was good, and the quality was maintained. The beverages under M3 or M5 had no obvious change over M7 in pH value and color stability, indicating that M3 and M5 are better sterilization methods.

Key words: Dendrobium officinale beverage, sterilization process, quality-related constituents, storage stability, polysaccharide content