Development and Assessment of a Color-Variable Chlorine Dioxide Slow-Releasing Card for Litchi Preservation

文献类型： 外文期刊

第一作者： Guo, Li

作者： Guo, Li;Luo, Lin;Deng, Hao;Guo, Li;Wu, Guang;Deng, Hao;Wu, Guang;Deng, Hao;Wu, Guang;Deng, Hao;Yin, Qingchun

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关键词： ClO2 slow-releasing card; color; litchi; development; assessment

期刊名称：FOODS （ 影响因子：5.1； 五年影响因子：5.6 ）

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年卷期： 2025 年 14 卷 1 期

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收录情况： SCI

摘要： Chlorine dioxide (ClO2) gas has attracted considerable attention due to its safety and efficiency. In this study, we successfully developed a color-variable ClO2 slow-releasing card for postharvest litchi. The optimal ClO2 slow-releasing card was prepared as follows: Card A was soaked in 2.5 mol/L NaClO2 and 0.3 mol/L CaCl2. Card B was soaked in 1 mol/L oxalic acid, 0.3 mol/L CaCl2, and natural pigment. Finally, cards A and B were dried and adhered using 60% gelatin. The ClO2 releasing time of the card was more than 120 h at 5-25 degrees C, and it could change color from dark yellow to white. The qualities of 3 kg litchi treated with no pieces (CK), half a piece (T1), one piece (T2), two pieces (T3), and three pieces (T4) of ClO2 slow-releasing card were compared. The results showed that litchi of T1 had significantly (p < 0.05) higher L* and a* values but a lower respiration rate and relative conductivity than CK after 7 days of storage, showing the best pulp qualities and pericarp color. Further correlation analyses revealed a significant positive correlation (R-2 = 0.971) between Cya-3-O-gal-1 and a*, indicating a sharp decline in Cya-3-O-gal-1 and strong pericarp browning in CK. On the contrary, the low-releasing ClO2 of T1 effectively inhibited Cya-3-O-gal-1 degradation. This could be one of the reasons for the superior pericarp color of T1. This study provides a visual, efficient, and economical solution for postharvest litchi.

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