干燥条件对茶枝柑果皮黄酮和精油成分的影响

采用HPLC对日晒和不同温度热风干燥下的茶枝柑果皮中的黄酮进行定性和定量分析,同时利用GC-MS检测分析了其精油成分及相对含量。结果表明,36、40、45和50℃干燥条件下的茶枝柑果皮的主要黄酮类化合物的含量与日晒相比有显著差异,42℃热风干燥与日晒相比则无显著差异。不同热风干燥条件下茶枝柑果皮精油的总离子流图基本一致,但是精油成分的总含量均显著高于日晒,此外精油成分的种类、数目、相对含量也存在一定的差异性,42℃热风干燥下的精油成分与日晒最为接近。结论:从保证茶枝柑果皮品质和节约能源提高生产效率的角度出发,42℃热风干燥是有利于保存茶枝柑果皮黄酮和精油成分的较佳干燥方式。 

Effect of different drying conditions on flavonoids and essential oils of Citrus reticulata cv.Chachiensis peel

Qualitative and quantitative analysis of flavonoids of Citrus reticulata cv. Chachiensis peel dried under natural sun drying and different hot- air drying conditions were determined by HPLC, and the compositions of its essential oils were detected by GC- MS. The results showed significant difference in the contents of four main flavonoids of Citrus Chachiensis peel under different drying temperature such as 36, 40, 45, 50℃ compared to natural sun drying, whereas no significant difference was found under 42℃ hot- air drying.Total ion chromatograms of essential oils were basically the same, though the total contents of essential oils of Citrus Chachiensis peel by hot- air drying were significantly higher than natural sun drying, and some differences in the types, numbers and relative contents of the composition of essential oils. The essential oils of Chachiensis peel under 42℃ hot- air drying was closest to natural drying. Conclusion: Considering saving energy and improving production efficiency, 42℃ hot- air drying is a relatively good drying method to preserve flavonoids and essential oils of Citrus Chachiensis peel.