CN105130943B - 一种原花青素的提取方法 - Google Patents
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- C07D311/02—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings ortho- or peri-condensed with carbocyclic rings or ring systems
- C07D311/04—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring
- C07D311/58—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring other than with oxygen or sulphur atoms in position 2 or 4
- C07D311/60—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring other than with oxygen or sulphur atoms in position 2 or 4 with aryl radicals attached in position 2
- C07D311/62—Benzo[b]pyrans, not hydrogenated in the carbocyclic ring other than with oxygen or sulphur atoms in position 2 or 4 with aryl radicals attached in position 2 with oxygen atoms directly attached in position 3, e.g. anthocyanidins
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Abstract
本发明公开了一种原花青素的提取方法,属于天然产物提取的技术领域,所述方法是从灰灰菜籽中提取获得原花青素,该方法操作简单,可代替传统的葡萄籽法,提取的原花青素的纯度和提取率均比传统的葡萄籽法高,效果显著。
Description
技术领域
本发明涉及的是天然产物提取的技术领域,尤其涉及的是一种原花青素的提取方法。
背景技术
原花青素(OPC)是目前已知的抗氧化作用最强的天然食品,是目前为止所发现的最强效的自由基清除剂,保护人体细胞组织免受自由基的氧化损伤,防治过敏、癌症、衰老等100多种与自由基有关的疾病,还具有加强和保护人体活性组织、稳定细胞膜以及抗酶活性(组胺脱羧酶)等生物特性。实验证明,OPC的抗自由基氧化能力是维生素E的50倍,维生素C的20倍。
实验证明许多物质中含有原花青素,但由于含量低没有提取价值,目前常用的提取方法为从葡萄籽中提取,比如:若以葡萄酒厂中提供的混合品种葡萄籽为原料,提取的原花青素的平均提取率为6.5-7.0%(不同品种的葡萄籽原花青素的提取率略有差异),提取的原花青素纯度为95-98%。
发明内容
本发明的目的在于克服现有技术的不足,提供了一种原花青素的提取方法,以提供一种新的高提取率的原花青素的制备方法。
本发明是通过以下技术方案实现的:
本发明提供了一种原花青素的提取方法,所述方法是以灰灰菜籽为原料,提取获得原花青素。
所述原花青素的提取方法,包括以下步骤:
(1)以灰灰菜籽为原料,将灰灰菜籽粉碎后,用体积比为50-55%的乙醇溶液浸提,获得提取液,将提取液减压蒸馏去除乙醇,获得浓缩的提取液;
(2)将步骤(1)浓缩的提取液中加入去离子水稀释,获得稀释液,将稀释液用AB-8大孔树脂吸附,去离子水清洗至清洗液无色后,用体积比为40%的乙醇溶液洗脱,并收集洗脱液;
(3)将步骤(2)的洗脱液冻干,获得所述原花青素。
所述步骤(1)中,先将灰灰菜籽阴干,-20℃冷冻4h以上后,再将灰灰菜籽粉碎;提取前将灰灰菜籽进行冷冻处理,可减少粉碎时脂类物质的析出,从而降低乙醇浸提过程中脂类物质的损耗,有利于后续原花青素在AB-8大孔树脂上的吸附与洗脱,提高原花青素的提取率。
所述步骤(1)中,每1g灰灰菜籽中加入20ml的乙醇溶液浸提,浸提的条件为70℃下浸提2h。
所述步骤(1)中,至少浸提两次,合并提取液。
所述步骤(2)中,浓缩的提取液中加入等体积的去离子水稀释。
所述步骤(2)中,稀释液与AB-8大孔树脂的体积比为3:1。
本发明相比现有技术具有以下优点:本发明提供了一种原花青素的提取方法,该方法操作简单,可代替传统的葡萄籽法,提取的原花青素的纯度和提取率均比传统的葡萄籽法高,效果显著。
具体实施方式
下面对本发明的实施例作详细说明,本实施例在以本发明技术方案为前提下进行实施,给出了详细的实施方式和具体的操作过程,但本发明的保护范围不限于下述的实施例。
实施例1
本实施例提供的原花青素的提取方法,包括以下步骤:
(1)以灰灰菜籽为原料,先将灰灰菜籽阴干,-20℃冷冻4h以上;然后将灰灰菜籽粉碎并称重,在70℃下,每1g灰灰菜籽中加入20ml的体积比为50%的乙醇溶液浸提2h,获得提取液;重复浸提两次后,合并提取液;最后,将提取液减压蒸馏去除乙醇,获得浓缩的提取液,经减压蒸馏去除的乙醇可回收再利用;
(2)将步骤(1)浓缩的提取液中加入等体积的去离子水稀释,获得稀释液,将稀释液用AB-8大孔树脂吸附,去离子水清洗至清洗液无色后,用体积比为40%的乙醇溶液洗脱,并收集洗脱液;其中,稀释液与AB-8大孔树脂的体积比为3:1。
(3)将步骤(2)的洗脱液冻干,获得原花青素,称重。
计算提取率:提取率=原花青素重/灰灰菜籽重×100%=7.8%
测定原花青素纯度:利用没食子酸法(Folin-Ciocahea法)测定本实施例获得的原花青素纯度,结果为:原花青素纯度=98.8%。
实施例2
本实施例提供的原花青素的提取方法,其中,步骤(1)的乙醇溶液的浓度为55%,其它步骤同实施例1。
计算提取率:提取率=原花青素重/灰灰菜籽重×100%=7.9%
测定原花青素纯度:利用没食子酸法(Folin-Ciocahea法)测定本实施例获得的原花青素的纯度,结果为:原花青素纯度=98.7%。
由实施例1、2可知,本发明从灰灰菜籽中提取原花青素,其提取率是常规葡萄籽法提取原花青素的1.1-1.2倍,提取的原花青素纯度也比葡萄籽法略高,提取效果显著。
Claims (6)
1.一种原花青素的提取方法,其特征在于,所述方法是以灰灰菜籽为原料,提取获得原花青素,具体包括以下步骤:
(1)以灰灰菜籽为原料,将灰灰菜籽粉碎后,用体积比为50-55%的乙醇溶液浸提,获得提取液,将提取液减压蒸馏去除乙醇,获得浓缩的提取液;
(2)将步骤(1)浓缩的提取液中加入去离子水稀释,获得稀释液,将稀释液用AB-8大孔树脂吸附,去离子水清洗至清洗液无色后,用体积比为40%的乙醇溶液洗脱,并收集洗脱液;
(3)将步骤(2)的洗脱液冻干,获得所述原花青素。
2.根据权利要求1所述的一种原花青素的提取方法,其特征在于,所述步骤(1)中,先将灰灰菜籽阴干,-20℃冷冻4h以上后,再将灰灰菜籽粉碎。
3.根据权利要求1所述的一种原花青素的提取方法,其特征在于,所述步骤(1)中,每1g灰灰菜籽中加入20ml的乙醇溶液浸提,浸提的条件为70℃下浸提2h。
4.根据权利要求1所述的一种原花青素的提取方法,其特征在于,所述步骤(1)中,至少浸提两次,合并提取液。
5.根据权利要求1所述的一种原花青素的提取方法,其特征在于,所述步骤(2)中,浓缩的提取液中加入等体积的去离子水稀释。
6.根据权利要求1所述的一种原花青素的提取方法,其特征在于,所述步骤(2)中,稀释液与AB-8大孔树脂的体积比为3:1。
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COMPARISON OF THE NUTRITIVE VALUE AND BIOLOGICAL ACTIVITIES OF THE ACETONE, METHANOL AND WATER EXTRACTS OF THE LEAVES OF BIDENS PILOSA AND CHENOPODIUM ALBUM;ADEOLU ADEDAPO et al.;《Acta Poloniae Pharmaceutica-Drug Research》;20111231;第68卷(第1期);第83-92页 * |
Nutritional quality of some wild leafy vegetables in South Africa;A.J.Afolayan et al.;《International Journal of Food Sciences and Nutrition》;20090831;第60卷(第5期);第424-431页 * |
超声波提取野生灰灰菜中叶黄素的工艺研究;王彦博等;《中国食品学报》;20140331;第14卷(第3期);第122-127页 * |
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