Acta Agriculturae Zhejiangensis ›› 2025, Vol. 37 ›› Issue (12): 2602-2614.DOI: 10.3969/j.issn.1004-1524.20241114

• Food Science • Previous Articles     Next Articles

Optimization of the color protection process for pear-Dendrobium compound puree and the influence of sterilization methods on its storage quality

GAN Yuping1(), GONG Weiqi2, ZHOU Chenyang1, LI Chuntian3, WANG Junwen1, LIU Chenxing1, XIA Qile1, LU Shengmin1,*()   

  1. 1. State Key Laboratory for Quality and Safety of Agro-Products, Zhejiang Provincial Key Laboratory of Smart Logistics and Processing of Fresh Food, Key Laboratory of Postharvest Handling of Fruits, Ministry of Agriculture and Rural Affairs, Institute of Food Science, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
    2. Zhejiang Tiefengtang Health Technology Co., Ltd., Yueqing 325615, Zhejiang, China
    3. Wuyi Tianyu Agricultural Development Co., Ltd., Wuyi 321205,Zhejiang, China
  • Received:2024-12-22 Online:2025-12-25 Published:2026-01-09

Abstract:

To inhibit enzymatic browning during the processing of pear puree and to develop a pear-Dendrobium compound puree with a distinctive flavor, this study optimized the color-preservation formula for pear puree and selected a suitable sterilization method to ensure the product’s quality during storage. Firstly, using the browning index as the evaluation indicator, the optimal color-preservation formula was optimized through single-factor and orthogonal experiments. Subsequently, compound puree was produced using optimized pear puree and Dendrobium juice as raw materials, and then treated with three different sterilization methods: pasteurization, microwave, and high-temperature steam sterilization. The changes in physicochemical properties, microbial counts, volatile components, and sensory quality of the purees were compared during 10-day storage at 4 ℃. The results showed that the optimized color-preservation formula consisted of 0.6% citric acid, 0.04% ascorbic acid, and 0.6% sodium chloride. Comparison of sterilization methods revealed no significant differences in soluble solid content of the pear-Dendrobium compound puree treated with the three methods(p>0.05). However, significant differences were observed in color parameters (L*, a*, b* values), total bacterial count, and the content of major nutritional components (p<0.05). Among them, the puree treated with high-temperature steam sterilization exhibited significantly higher a* and b* values, total phenol content, total sugar content, and total volatile compounds compared with the other two groups, and also achieved the highest sensory evaluation score. During storage at 4 ℃, the total soluble solid content, pH value, total phenol content, and total sugar content of the pear-Dendrobium compound puree decreased in all three methods; however, the reduction was least pronounced in the high-temperature steam sterilization group, indicating the most stable quality. In conclusion, high-temperature steam sterilization effectively maintains the color, nutritional components, and flavor of pear-Dendrobium compound puree, delays quality deterioration during storage, and is recommended as the preferred processing and preservation method for this product.

Key words: pear-Dendrobium compound puree, color protection, sterilization method, storage quality, shelf-life

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