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投稿时间：2015-05-04
投稿时间：2015-05-04
中文摘要: 以汉中毛竹叶为原料，采用超声波预处理-乙醇回流法提取竹叶黄酮。在不同的液固比、乙醇浓度、回流温度和回流时间下，探讨最佳提取工艺；并对黄酮的抗氧化稳定性进行研究。研究结果表明，当料液比为1∶30（g/mL），乙醇浓度为70%，回流温度为70℃，回流时间为120min时，竹叶黄酮提取率最高为2.917%。抗氧化试验表明，pH、光照时间、Cu2+、Zn2+以及Al3+对抗氧化能力影响较大，金属离子Na+、Ca2+、Mg2+对竹叶黄酮清除DPPH自由基（二苯代苦肼基自由基）的能力影响相对较小。
Abstract:The extraction process of flavone in bamboo leaf from Hanzhong assisted by ultrasonic wave pretreatment was studied.The flavone extraction from the different solid-to-liquid ratio，ethanol concentration，extraction temperature and extraction time were studied.And the antioxidant stability of flavone was assessed by its capacity to scavenge the DPPH free radical under different treatments.The results showed that the best extraction process condition was：the ratio of solid to extracting liquid 1∶30（g/mL），ethanol concentration 70%，abstracting temperature 70℃and abstracting time 120 min.The results of anti-oxidant activities showed that pH，illumination and metal ions（Cu2+，Zn2+，Al3+）had a bigger influence to the antioxidation stability of flavones.The metal ions Na+，Ca2+，Mg2+did not produce a great a reduction of scavenging capacity.
keywords: bamboo leaf flavone extraction antioxidan stability
文章编号：201611013 中图分类号： 文献标志码：
基金项目:国家自然科学基金（21373132）
| Author Name | Affiliation |
| SHI Juan，LI Jiang，GE Hong-guang | School of Chemistry and Environment Science，Shaanxi University of Technology，Hanzhong 723000，Shaanxi，China |
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