干燥方式对黄菊花活性成分、抗氧化特性及挥发性风味的影响

    Effects of drying methods on active components, antioxidant properties and volatile Flavor Profiles of Chrysanthemum morifolium

    • 摘要: 黄菊花作为传统药食两用资源,其干燥工艺直接影响活性成分保留及产品品质。通过比较杀青烘干(50℃)、杀青阴干、杀青冻干、烘干、阴干及冻干6种干燥方式对黄菊花色泽、活性成分(总酚、总黄酮)含量、抗氧化能力(DPPH、FRAP、ABTS)及挥发性风味的影响。结果表明:电子鼻结合主成分分析(PCA)表明阴干处理组的挥发性物质综合响应值显著高于其他组(P<0.05),杀青烘干和冻干组因高温或真空环境导致挥发性成分显著损失。阴干和冻干处理组的总黄酮含量最高(86.46和84.37 mg·g−1),显著优于杀青烘干组(46.19 mg·g−1)(P<0.05);杀青预处理显著降低了黄酮保留率,其平均损失率26.3%。抗氧化活性呈现方法依赖性,阴干和烘干样品在DPPH(213.81和212.10 μmol·g−1)和ABTS(84.44和82.83 μmol·g−1)自由基清除能力上表现最优,FRAP还原能力以烘干组最高(356.02 μmol·g−1)。建议功能性产品优先采用阴干或冻干方式,而工业化生产可考虑阶梯式热风干燥方式以平衡品质与效率。

       

      Abstract: As a traditional medicinal and edible dual-use resource, the drying process of Chrysanthemum morifolium directly affects the retention of active ingredients and product quality. This study compared the effects of six drying methods, including steam de-enzyming and hot air drying(50℃), steam de-enzyming and drying in the shade, steam de-enzyming and freeze-drying, hot air drying, drying in the shade, and freeze-drying, on the color, active ingredients(total phenols, total flavonoids), antioxidant capacity(DPPH, FRAP, ABTS), and volatile flavor of Chrysanthemum morifolium. Key results are as follows: The combination of E-nose and principal component analysis(PCA)showed that the shade drying group exhibited significantly higher comprehensive response values for volatile compounds compared to the other groups(P<0.05), while the volatile components were significantly lost in the steam de-enzyming and hot air drying as well as freeze-drying groups due to high temperature or vacuum environment. The shade drying and freeze-drying treatments yielded the highest total flavonoid contents(86.46 and 84.37 mg·g−1)significantly better than that in the steam de-enzyming and hot air drying group(46.19 mg·g−1)(P<0.05). The steam de-enzyming pretreatment significantly reduced the flavonoid retention rate, with an average loss rate of 26.3%. Antioxidant activity results were showed methods dependence, with the shade dried and hot air dried samples showing the best DPPH(213.81 and 212.10 μmol·g−1)and ABTS(84.44 and 82.83 μmol·g−1)radical scavenging ability, while the FRAP reducing ability was highest in the hot air dried group(356.02 μmol·g−1). It is suggested that drying in the shade or freeze-drying should be prioritized for functional products, while industrial production can consider multi-stage hot air drying to balance quality and efficiency.

       

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