不同干燥方式对牡丹花外观和成分保留的影响

Effect of Different Drying Methods on the Property and Compounds of Peony Flower

为研究牡丹花的干燥方法,使牡丹花产业链不受季节的限制,试验采用热风、真空干燥的方法,对牡丹鲜花进行干燥,建立干燥动力学曲线,并进行感官评价,比较选出最优干燥条件;同时研究两种干燥方法对牡丹花活性成分保留率的影响。结果表明,热风干燥最佳温度为60℃,干燥时间为7 h;真空干燥最佳温度为70℃,干燥时间需要70 min。对两种干燥方式干燥后的牡丹花品质进行感官评定后发现,真空干燥优于热风干燥。两种干燥方法对槲皮素、柚皮素、芦丁、没食子酸和维生素C五种成分保留率的影响不同,真空干燥对牡丹花中芦丁和槲皮素的保留程度较佳,而热风干燥对柚皮素的保留率较高。研究结果有望为牡丹花的干燥和工业化生产提供一定的理论依据。

In order to optimize the drying method of peonies and make the chain of peonies free from limits of seasons, our study used the drying method of hot-blast air, vacuum, and compared the results to choose the most suitable drying method. And the effects of two drying methods on the retention rate of active components of peony were studied. The results showed that the optimal temperature of hot-blast air drying was 60 ℃, the drying time was 7 h, the optimal drying temperature of vacuum drying was 70 ℃, and the drying time was 70 min. The sensory evaluation of peony quality aider drying in two drying methods showed that vacuum drying was better than hot air drying. The effect of two drying methods on the retention rate of quercetin, naringenin, rutin, gallic acid and vitamin C was different. Vacuum drying had better retention of rutin and quercetin in peony flowers. Naringenin retention rate was higher in hot-blast air drying. The results were expected to provide a theoretical basis for the drying and industrial production of peony flowers.