CN110141605A - 一种血水草总生物碱纳米微粒的制备方法 - Google Patents
一种血水草总生物碱纳米微粒的制备方法 Download PDFInfo
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Abstract
本发明提供了一种血水草总生物碱纳米微粒的制备方法。制备步骤如下:a)将血水草药用部位粉碎,与碱性物质混合,加入水混匀,静置过夜;b)调节pH,收集沉淀,进行干燥,采用醇提取,浓缩过滤;c)滤液经过冷藏,逆流喷入超临界结晶釜中进行制取;d)收集底部纳米颗粒,即得血水草总生物碱纳米微粒。本方法主要是对血水草的药材的有效部位中的生物碱提取纯化,将生物碱转变为离子对,过滤,产品总生物碱含量达到60%以上,所获得的纳米粒子的最小直径500nm,主体分部为1‑15μm。工艺环保无污染,过程简洁,适用于大生产。总生物碱的纳米粒子吸收率高,生物利用度高,且在饲料添加剂、药品及食品领域将有更广泛的应用。
Description
技术领域
本发明涉及医药技术领域,具体涉及一种血水草总生物碱纳米微粒的制备方法。
背景技术
天然产物及其衍生物是当今世界临床用药的主要来源之一,而中草药是寻求新的活性组分的宝贵资源。生物碱是中草药中一大类重要的活性成分,具有庞大的数量、复杂的结构和丰富的生理功能。
传统的生物碱提取方法通常采用浸渍、回流、渗漉、煎煮等方法,这些方法本质上都属于溶剂法。随着现代分离技术的飞速发展,一些新技术、新方法也被应用到生物碱的提取工艺中来。如超声辅助提取技术、微波辅助萃取技术、超临界流体萃取技术等,这些现代提取技术的应用,有望解决传统提取过程中存在的能耗大、污染重、杂质多、效率较低等问题,因此这些优势显著的新方法也成为当今分离技术的研究热点。
生物碱的分离与精制也有许多经典的方法,如溶剂萃取法、沉淀法与结晶法等。尽管这些技术较为成熟,但效率不高,成本收益率较低,因此,一些先进的分离纯化技术也就应运而生,发展迅速。近年出现的新技术包括色谱分离技术如制备液相色谱,高速逆流色谱,凝胶柱色谱等、树脂吸附技术大孔树脂吸附,离子交换树脂吸附、分子印迹、膜分离技术等。这些新兴的分离技术克服了传统方法存在的溶剂、能源消耗大且效率不高的问题,有效地改善了生物碱的分离与纯化效果,使生物碱的制备向着高效、节能、规模化的方向发展。
血水草是罂粟科白屈菜族血水草属植物,是我国独属、独种的特有物种,系多年生草本植物,广泛分布于我国浙江、江西、四川、湖南等南方各省区,根及根茎入药。国内对血水草的研究多见于化学成分和药理方面,对其总生物碱提取分离及纯化工艺的报道很少。龙丽娜用溶剂套用法提取,模拟工业生产中组罐的提取工艺提取血水草的总生物碱,产品品质不理想,且效率较低。中国发明专利一种血水草总生物碱的提取工艺(申请号或专利号CN201010182943.2)、一种分离白屈菜、血水草或飞龙掌血总生物碱的方法(申请号或专利号CN CN200710098448.1)等均采用常规的提取方式,对生物碱的提取率不高,且耗时、不易产业化等。
发明内容
要解决的技术问题:本发明的目的是提供一种血水草总生物碱纳米微粒的制备方法,采用超临界反向萃取非药用成分的方式,通过改变萃取介质极性,且改变离子对的性质获取血水草中的总生物碱。此方法几乎不产生废水,过程中环保,提取率高。
技术方案:一种血水草总生物碱纳米微粒的制备方法,包括以下步骤:
a)将血水草药用部位粉碎,与碱性物质混合,加入水混匀,静置过夜;
b)调节pH,收集沉淀,进行干燥,采用醇提取,浓缩过滤;
c)滤液经过冷藏,逆流喷入超临界结晶釜中进行制取;
d)收集底部纳米颗粒,即得血水草总生物碱纳米微粒。
进一步的,所述的步骤a)中血水草的药用部位为地上生长部位,粉碎至粒径为60~100目。
进一步的,所述的步骤a)中碱性物质为Ca(OH)2、NaHCO3、NaOH、KOH中的一种或几种,添加比例为0.1~2%;所述水的添加比例为30~60%。
进一步的,所述的步骤b)中pH调节至3~4,所述醇为90-95%乙醇溶液,提取温度为60-72℃。
进一步的,所述的步骤c)中冷藏温度为5~8℃,冷藏时间为8-12h;所述的喷入方式为底部向上部喷射,流速为0.01-1L/min。
进一步的,所述的步骤c)中超临界结晶釜的条件为:温度为15~25℃,压力为15~35MPa,介质为CO2或2~10%乙醇-CO2混合流体,流动方向为自上而下,流速为0.5-3L/min。
进一步的,所制备的血水草总生物碱纳米微粒大小为最小直径500nm,主体分部为1-15μm,所制备的总生物碱的含量大于60%。
进一步的,所述制备的血水草总生物碱纳米颗粒可用于饲料添加剂、保健食品和药品。
进一步的,所制备的总生物碱检测方法采用HPLC-DAD,条件为:色谱柱:C18(200mm×4.6mm,5μm);流动相:乙腈+水=30+70(V/V)(每100ml水中加0.1ml磷酸);流速:1.0ml/min;柱温:35℃;检测波长:270 nm;进样体积:20μl。
有益效果:
1.本发明方法几乎不产生废水,过程中环保,提取率高。
2.本发明方法获得产品总生物碱的含量超过60%,提取率大于60%。
3.本发明方法制备的生物碱纳米颗粒可用于饲料添加剂、保健食品和药品领域,尤其可用于治疗宠物寄生虫等领域。
具体实施方式
实施例1
一种血水草总生物碱纳米微粒的制备方法,包括以下步骤:
a)将血水草地上生长部位粉碎至粒径为100目,与0.1wt%Ca(OH)2混合,加入30wt%水混匀,静置过夜;
b)调节pH至3,收集沉淀,进行干燥,采用95%乙醇溶液提取,提取温度为60℃,浓缩过滤;
c)滤液经过5℃冷藏8h,逆流喷入超临界结晶釜中进行制取,喷入方式为底部向上部喷射,流速为0.01L/min;超临界结晶釜的条件为:温度为15℃,压力为15MPa,介质为CO2,流动方向为自上而下,流速为0.5L/min;
d)收集底部纳米颗粒,即得血水草总生物碱纳米微粒。
总生物碱检测方法采用HPLC-DAD,条件为:色谱柱:C18 (200mm×4.6mm,5μm);流动相:乙腈:水=30:70(V/V)(每100ml水中加0.1ml磷酸);流速:1.0ml/min;柱温:35℃;检测波长:270 nm;进样体积:20μl。
所制备的血水草总生物碱纳米微粒大小为最小直径500nm,主体分部为1-15μm,所制备的总生物碱的含量为60.5%。
实施例2
一种血水草总生物碱纳米微粒的制备方法,包括以下步骤:
a)将血水草地上生长部位粉碎至粒径为60目,与0.5wt%NaHCO3混合,加入40wt%水混匀,静置过夜;
b)调节pH至3,收集沉淀,进行干燥,采用90%乙醇溶液提取,提取温度为63℃,浓缩过滤;
c)滤液经过6℃冷藏9h,逆流喷入超临界结晶釜中进行制取,喷入方式为底部向上部喷射,流速为0.05L/min;超临界结晶釜的条件为:温度为17℃,压力为20MPa,介质为2%乙醇-CO2混合流体,流动方向为自上而下,流速为1L/min;
d)收集底部纳米颗粒,即得血水草总生物碱纳米微粒。
总生物碱检测方法采用HPLC-DAD,条件为:色谱柱:C18 (200mm×4.6mm,5μm);流动相:乙腈:水=30:70(V/V)(每100ml水中加0.1ml磷酸);流速:1.0ml/min;柱温:35℃;检测波长:270 nm;进样体积:20μl。
所制备的血水草总生物碱纳米微粒大小为最小直径500nm,主体分部为1-13.5μm,所制备的总生物碱的含量为60.9%。
实施例3
一种血水草总生物碱纳米微粒的制备方法,包括以下步骤:
a)将血水草地上生长部位粉碎至粒径为80目,与1wt%NaOH混合,加入45wt%水混匀,静置过夜;
b)调节pH至3.5,收集沉淀,进行干燥,采用95%乙醇溶液提取,提取温度为65℃,浓缩过滤;
c)滤液经过6℃冷藏10h,逆流喷入超临界结晶釜中进行制取,喷入方式为底部向上部喷射,流速为0.5L/min;超临界结晶釜的条件为:温度为20℃,压力为25MPa,介质为6%乙醇-CO2混合流体,流动方向为自上而下,流速为1.5L/min;
d)收集底部纳米颗粒,即得血水草总生物碱纳米微粒。
总生物碱检测方法采用HPLC-DAD,条件为:色谱柱:C18 (200mm×4.6mm,5μm);流动相:乙腈:水=30:70(V/V)(每100ml水中加0.1ml磷酸);流速:1.0ml/min;柱温:35℃;检测波长:270 nm;进样体积:20μl。
所制备的血水草总生物碱纳米微粒大小为最小直径500nm,主体分部为1-13.5μm,所制备的总生物碱的含量为61.7%。
实施例4
一种血水草总生物碱纳米微粒的制备方法,包括以下步骤:
a)将血水草地上生长部位粉碎至粒径为80目,与1.5wt%KOH混合,加入50wt%水混匀,静置过夜;
b)调节pH至4收集沉淀,进行干燥,采用95%乙醇溶液提取,提取温度为68℃,浓缩过滤;
c)滤液经过7℃冷藏11h,逆流喷入超临界结晶釜中进行制取,喷入方式为底部向上部喷射,流速为0.8L/min;超临界结晶釜的条件为:温度为22℃,压力为30MPa,介质为8%乙醇-CO2混合流体,流动方向为自上而下,流速为2.5L/min;
d)收集底部纳米颗粒,即得血水草总生物碱纳米微粒。
总生物碱检测方法采用HPLC-DAD,条件为:色谱柱:C18 (200mm×4.6mm,5μm);流动相:乙腈:水=30:70(V/V)(每100ml水中加0.1ml磷酸);流速:1.0ml/min;柱温:35℃;检测波长:270 nm;进样体积:20μl。
所制备的血水草总生物碱纳米微粒大小为最小直径500nm,主体分部为1-14μm,所制备的总生物碱的含量大于61.5%。
实施例5
一种血水草总生物碱纳米微粒的制备方法,包括以下步骤:
a)将血水草地上生长部位粉碎至粒径为100目,与0.5wt%Ca(OH)2、0.5wt%NaHCO3、0.5wt%NaOH、0.5wt%KOH混合,加入60wt%水混匀,静置过夜;
b)调节pH至3~4,收集沉淀,进行干燥,采用95%乙醇溶液提取,提取温度为72℃,浓缩过滤;
c)滤液经过8℃冷藏12h,逆流喷入超临界结晶釜中进行制取,喷入方式为底部向上部喷射,流速为1L/min;超临界结晶釜的条件为:温度为25℃,压力为35MPa,介质为10%乙醇-CO2混合流体,流动方向为自上而下,流速为3L/min;
d)收集底部纳米颗粒,即得血水草总生物碱纳米微粒。
总生物碱检测方法采用HPLC-DAD,条件为:色谱柱:C18 (200mm×4.6mm,5μm);流动相:乙腈:水=30:70(V/V)(每100ml水中加0.1ml磷酸);流速:1.0ml/min;柱温:35℃;检测波长:270 nm;进样体积:20μl。
所制备的血水草总生物碱纳米微粒大小为最小直径500nm,主体分部为1-15μm,所制备的总生物碱的含量为61.5%。
Claims (8)
1.一种血水草总生物碱纳米微粒的制备方法,其特征在于:包括以下步骤:
a)将血水草药用部位粉碎,与碱性物质混合,加入水混匀,静置过夜;
b)调节pH,收集沉淀,进行干燥,采用醇提取,浓缩过滤;
c)滤液经过冷藏,逆流喷入超临界结晶釜中进行制取;
d)收集底部纳米颗粒,即得血水草总生物碱纳米微粒。
2.根据权利要求1所述的一种血水草总生物碱纳米微粒的制备方法,其特征在于:所述的步骤a)中血水草的药用部位为地上生长部位,粉碎至粒径为60~100目。
3.根据权利要求1所述的一种血水草总生物碱纳米微粒的制备方法,其特征在于:所述的步骤a)中碱性物质为Ca(OH)2、NaHCO3、NaOH、KOH中的一种或几种,添加比例为0.1~2%;所述水的添加比例为30~60%。
4.根据权利要求1所述的一种血水草总生物碱纳米微粒的制备方法,其特征在于:所述的步骤b)中pH调节至3~4,所述醇为90-95%乙醇溶液,提取温度为60-72℃。
5.根据权利要求1所述的一种血水草总生物碱纳米微粒的制备方法,其特征在于:所述的步骤c)中冷藏温度为5~8℃,冷藏时间为8-12h;所述的喷入方式为底部向上部喷射,流速为0.01-1L/min。
6.根据权利要求1所述的一种血水草总生物碱纳米微粒的制备方法,其特征在于:所述的步骤c)中超临界结晶釜的条件为:温度为15~25℃,压力为15~35MPa,介质为CO2或2~10%乙醇-CO2混合流体,流动方向为自上而下,流速为0.5-3L/min。
7.根据权利要求1所述的一种血水草总生物碱纳米微粒的制备方法,其特征在于:所制备的血水草总生物碱纳米微粒大小为最小直径500nm,主体分部为1-15μm,所制备的总生物碱的含量大于60%。
8.根据权利要求7所述的一种血水草总生物碱纳米微粒的制备方法,其特征在于:所述制备的血水草总生物碱纳米颗粒可用于饲料添加剂、保健食品和药品。
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