多指标评价不同干燥工艺及切片对三叶青质量的影响
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篇名: 多指标评价不同干燥工艺及切片对三叶青质量的影响
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摘要: 目的:研究不同干燥工艺和切片对三叶青质量的影响,优选三叶青的干燥处理方式。方法:分别采用2种处理方式(切片、不切片)及5种干燥方法(阴干、晒干、热风干燥、微波干燥、冷冻干燥)对三叶青块根进行处理,分别干燥3.5 h~213.0 h后,以药材中总黄酮、多糖、总多酚和β-谷甾醇的含量为指标,对比分析不同干燥工艺对三叶青质量的影响。结果:与不切片比较,三叶青切片后可缩短干燥时间,减少药材中活性成分的损耗。5种干燥方法中,冷冻干燥对三叶青中活性成分保留效果最好,切片干燥后药材中总黄酮、多糖、总多酚和β-谷甾醇的含量分别约为18.5、92.7、9.19、0.344 mg/g;微波干燥次之,随后依次为热风干燥、阴干和晒干。各干燥方法间有效成分含量差异有统计学意义(P<0.05或P<0.01)。结论:不同干燥工艺对三叶青质量有明显影响;从成本、有效成分含量及实用性等综合分析,三叶青宜采用切片后在60 ℃热风干燥的方式处理。
ABSTRACT: OBJECTIVE: To study the effects of different drying technologies and slicing on the quality of Tetrastigma hemsleyanum, and optimize the drying methods for T. hemsleyanum. METHODS: 2 treatment methods (slicing and no slicing) and 5 drying methods (drying in the shade, drying in the sunlight, hot-air drying, microwave drying and freeze drying) were respectively adopted for the T. hemsleyanum root. After drying for 3.5-213.0 h, using the total flavonoids, total polyphenols, polysaccharides and β-sitosterol as indexes, effects of different drying technologies on the quality of T. hemsleyanum were comparatively analyzed. RESULTS: Compared with no slicing, sliced T. hemsleyanum can shorten the drying time and reduce the loss of active ingredients. In the 5 drying methods, freeze drying was the best for keeping the active ingredients in T. hemsleyanum. After drying, the contents of total flavonoids, polysaccharides, total polyphenols and β-sitosterol were 18.5 mg/g, 92.7 mg/g, 9.19 mg/g and 0.344 mg/g respectively, followed by microwave drying, hot-air drying, drying in the shade and drying in the sunlight. The contents of active ingredients had statistical significance by each drying methods (P<0.05 or P<0.01). CONCLUSIONS: Different drying technologies have obvious effects on the quality of T. hemsleyanum. Slicing and hot-air drying at 60 ℃ were suggested as suitable method for   T. hemsleyanum in terms of cost, content of active ingredients and practicability.
期刊: 2017年第28卷第31期
作者: 陈翔,郭海波,刘婷,许景景,郑国平
AUTHORS: CHEN Xiang,GUO Haibo,LIU Ting,XU Jingjing,ZHENG Guoping
关键字: 三叶青;干燥工艺;热风干燥;总黄酮;总多酚;多糖;β-谷甾醇
KEYWORDS: Tetrastigma hemsleyanum; Drying technology; Hot-air drying; Total flavonoids; Total polyphenols; Polysaccharides; β-sitosterol
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