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原花青素是广泛存在于植物体内的一大类多酚化合物,在酸性条件下加热会生产花青素。原花青素具有极高的抗氧化性和自由基清除能力,还有消炎抗癌、抗衰老等作用,因此广泛应用于医药、食品、保健和化妆品等方面。葡萄籽中含有大量的优质原花青素,通过乙醇浸提法提取葡萄籽中的原花青素,既可以充分利用葡萄酒副产物,又可以生产优质原花青素。以原花青素提取量和DPPH自由基清除能力为试验指标确定乙醇法提取葡萄籽原花青素的最佳工艺条件,为原花青素的进一步开发和利用提供支持。经过单因素试验与正交试验的反复探索得出葡萄籽原花青素提取的最佳工艺条件为:料液比1∶10,提取时间90 min,提取温度20℃,乙醇浓度70%,pH=4,经验证实验确定原花青素提取量为1.584 mg/g,DPPH自由基清除能力为12.41μmol/g。
Abstract:Proanthocyanidins is major polyphenols and widely existed in plants,and will produce anthocyanin under heating in acidic conditions. Proanthocyanidins has a very high resistance to oxidation and strong radical scavenging ability,and it also has anti-inflammatory,anti-cancer,anti-aging functions. Therefore,it widely used in medicine,food,health care and cosmetics. There are abundant proanthocyanidins in grape seeds,extracting proanthocyanidins from grape seeds by ethanol can fully use of the wine making by-products. The extraction rate of proanthocyanidins and its DPPH free radical scavenging capacity are two indexes in determining the optimum extraction process. The experiment provides support for the further development and utilization of proanthocyanidins. The optimum extraction process conditions determined by single-factor and orthogonal test are as follows:solid-liquid ratio of 1∶10,extraction time 90 min,extraction temperature 20℃,ethanol concentration 70%,pH=4. Under the above conditions,the extraction amount of proanthocyanidins was 1.584mg/g,and DPPH free radical scavenging capacity was 12.41 μmol/g.
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基本信息:
中图分类号:TQ914.3
引用信息:
[1]李丹丹,梁英,杨宏志,等.葡萄籽原花青素提取工艺的研究[J].中国食品添加剂,2017,No.162(08):55-62.
基金信息:
国家自然科学基金青年科学基金项目(3101828);; 大庆市指导性科技计划项目(zd-2016-108);; 黑龙江八一农垦大学引进人才科研启动计划资助项目(XYB2013-16)