超临界CO2提取落叶松树皮原花青素及其稳定性的研究  

Study on Proanthocyanidins Supercritical Extraction from Larch Bark and Its Stability

作　　者：张相[1] 张小丽 崔晓霞 张力平 张忠涛 

机构地区：[1]北京林业大学材料科学与技术学院 [2]不详

出　　处：《林产工业》2014年第3期24-27,31,共5页China Forest Products Industry

基　　金：国家林业公益性行业科研专项项目(201204804)

摘　　要：采用超临界CO_2萃取技术研究了落叶松树皮原花青素的提取工艺及稳定性,工艺条件为:温度30℃,压力30MPa,乙醇体积分数80%,颗粒度40~60目,得率20.6%,原花青素含量约75%。温度、光照、pH和金属离子均会对落叶松树皮原花青素的稳定性造成影响。低温、避光、弱酸性条件下稳定性较好,温度上升、光照增强、碱性增强均会使原花青素破坏加快。Ba^(2+)离子对原花青素的保存率最大,Fe^(2+)离子、Fe^(3+)离子、Cu^(2+)离子加入后原花青素含量会迅速降低。This paper studies the extract process of proanthocyanidins in larch bark by using supercriti-calCO2 extraction technology and its stability.Process conditions are temperature 30℃,pressure 30MPa,entrainer ethanol 80%（volume）,particle size 40～60 mesh,procyanidins purity can be 75%,yield 20.6%.The result shows that：temperature,light,pH and metal ions all impact the stability of proanthocyanidins in larch bark extract.At low temperatures,in dark or slightly acidic conditions it shows better stability.As the temperature,the light intensity or the pH rises,the destruction of proanthocyanidins will be accelerated.Ba2＋ ions contribute less in the destruction of proanthocyanidins.Once Fe2＋、Fe3＋、Cu2＋ ions are added,the content of Proanthocyanidins decreases rapidly.

关 键 词：超临界CO2 原花青素 落叶松树皮 稳定性 

分 类 号：TQ914[化学工程] S791.22[农业科学—林木遗传育种]