CN114028452A - 一种黄芩苷提取物及其制备方法 - Google Patents
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Abstract
本发明公开了一种黄芩苷提取物及其制备方法,所述制备方法包括如下步骤:(1)称取黄芩原料,打粉过20目,加入生药材8倍量80%乙醇,加热回流浸提2次,每次2h;(2)减压抽滤,得到滤液;(3)将2步的滤液减压浓缩为无醇味,浓缩液于78~82℃保温,同时用稀盐酸调pH为1~2,静置;(4)用离心机离心,收集沉淀;(5)将4步得到的沉淀,加5BV水,充分搅拌,使其成为悬浮液,再次进行离心,收集沉淀;(6)将5步得到的沉淀,进行真空干燥,得黄芩苷提取物。本发明采用含水乙醇回流提取,即利用沸点比较低的溶剂对黄芩中的有效物质进行提取,减少了溶剂用量,提高了黄芩苷的含量及收率,同时大大缩短了提取周期。
Description
技术领域
本发明涉及植物提取技术领域,具体涉及一种黄芩苷提取物及其制备方法。
背景技术
黄芩为多年生草本植物,为唇形科黄芩属植物黄芩的干燥根,具有清热燥湿、泻火解毒、止血、安胎的功效。临床试验证明,黄芩还具有抗氧化、抗炎、抗过敏等药理作用,对免疫、心脑血管、消化、神经等系统有保护作用。黄芩作为我国传统中药材,需要进一步分离和纯化,而黄芩苷是黄芩的主要成分,因此优化黄芩苷的提取纯化以及提高黄芩苷产率具有重要意义。
黄芩苷为黄酮类化合物中的黄酮化合物,分子式为C21H18O11,其分子量为446.35,淡黄色针晶。
现有黄芩苷的提取工艺及存在的主要问题为:
(1)水煎煮提取法:水提取其中的蛋白质和鞣酸,但大大增加了后续的分离纯化步骤;煎煮法作为传统的提取方法,虽然工业化生产方便,但是提取率较低,溶媒用量大,周期长;
(2)乙醇室温浸提法:50%乙醇,室温浸提3次,每次24h,该方法在自然条件下进行提取,无外来能量,因此耗时长,效量低。
发明内容
本发明所要解决的技术问题是克服背景技术的技术缺陷,提供一种黄芩苷提取物及其制备方法。本发明采用含水乙醇回流提取,即利用沸点比较低的溶剂对黄芩中的有效物质黄芩苷进行提取,减少了溶剂用量,提高了黄芩苷的含量及收率,同时大大缩短了提取周期。
本发明解决上述技术问题所采用的技术方案如下:
一种黄芩苷提取物的制备方法,包括如下步骤:
(1)提取:称取黄芩原料,打粉过20目,加入生药材8倍量80%乙醇,加热回流浸提2次,每次2h;
(2)过滤:减压抽滤,得到滤液;
(3)浓缩:将2步的滤液减压浓缩为无醇味,浓缩液于78~82℃保温,同时用稀盐酸调pH为1~2,静置;
(4)离心:用离心机离心,收集沉淀;
(5)水洗:将4步得到的沉淀,加5BV水,充分搅拌,使其成为悬浮液,再次进行离心,收集沉淀;
(6)干燥:将5步得到的沉淀,进行真空干燥,得黄芩苷提取物。
优选地,所述步骤(3)中,所述减压浓缩的条件为-0.080Mpa,50~80℃,更优选为50℃。
优选地,所述步骤(3)中,所述保温的温度为80℃。
优选地,所述步骤(3)中,所述保温的时间为80min。
优选地,所述步骤(3)中,所述静置的时间为24h。
优选地,所述步骤(6)中,所述真空干燥的条件为-0.08MPa,70℃。
一种黄芩苷提取物,采用如上所述的一种黄芩苷提取物的制备方法的制备得到。
上述技术方案中,优选用80%乙醇回流提取,含量高。
上述技术方案中,优选浓缩液于80℃保温80min的同时,用稀盐酸调pH为1.5。
上述技术方案中,采用80%乙醇回流提取,大大缩短了浸提时间,后续采用80℃保温,离心,水洗,同时也提高产能。
上述技术方案中,所述%为质量百分含量。
与现有技术相比,本发明的有益效果是:
(1)针对现有工艺水煎注法及乙醇室温浸提法周期长、收率低的问题,本发明采用含水乙醇回流提取,即利用沸点比较低的溶剂对黄芩中的有效物质黄芩苷进行提取,减少了溶剂用量,提高了黄芩苷的含量及收率,同时大大缩短了提取周期;
(2)本发明制得的黄芩苷提取物中的黄芩苷的含量及收率较高,其中黄芩苷的含量可达85%,黄芩苷的收率可达90%。
具体实施方式
为了更好地理解本发明的内容,下面结合具体实施例作进一步说明。应理解,这些实施例仅用于对本发明进一步说明,而不用于限制本发明的范围。此外应理解,在阅读了本发明所述的内容后,该领域的技术人员对本发明作出一些非本质的改动或调整,仍属于本发明的保护范围。
实施例1
一种黄芩苷提取物的制备方法,包括如下步骤:
(1)提取:称取1000g黄芩原料,打粉过20目,加入生药材8倍量80%乙醇,加热回流浸提2次,每次2h;
(2)过滤:减压抽滤,得到滤液;
(3)浓缩:将2步的滤液于-0.080Mpa下,50℃减压浓缩为无醇味,其浓缩液于78℃保温80min,同时用稀盐酸调pH为1,静置24h;
(4)离心:用离心机离心,收集沉淀;
(5)水洗:将4步得到的沉淀,加5BV水,充分搅拌,使其成为悬浮液,再次进行离心,收集沉淀;
(6)干燥:将5步得到的沉淀,进行真空干燥,-0.08MPa,70℃,得黄芩苷提取物;
(7)检测:收集产物送检,黄芩苷提取物中的黄芩苷的含量为80%,黄芩苷的收率为80%。
实施例2
一种黄芩苷提取物的制备方法,包括如下步骤:
(1)提取:称取1000g黄芩原料,打粉过20目,加入生药材8倍量80%乙醇,加热回流浸提2次,每次2h;
(2)过滤:减压抽滤,得到滤液;
(3)浓缩:将2步的滤液于-0.080Mpa下,50℃减压浓缩为无醇味,其浓缩液并于82℃保温80min,同时用稀盐酸调pH为2,静置24h;
(4)离心:用离心机离心,收集沉淀;
(5)水洗:将4步得到的沉淀,加5BV水,充分搅拌,使其成为悬浮液,再次进行离心,收集沉淀;
(6)干燥:将5步得到的沉淀,进行真空干燥,-0.08MPa,70℃,得黄芩苷提取物;
(7)检测:收集产物送检,黄芩苷提取物中的黄芩苷的含量为78%,黄芩苷的收率为78%。
实施例3
一种黄芩苷提取物的制备方法,包括如下步骤:
(1)提取:称取1000g黄芩原料,打粉过20目,加入生药材8倍量80%乙醇,加热回流浸提2次,每次2h;
(2)过滤:减压抽滤,得到滤液;
(3)浓缩:将2步的滤液于-0.080Mpa下,50℃减压浓缩为无醇味,其浓缩液于80℃保温80min,同时用稀盐酸调pH为1.5,静置24h;
(4)离心:用离心机离心,收集沉淀;
(5)水洗:将4步得到的沉淀,加5BV水,充分搅拌,使其成为悬浮液,再次进行离心,收集沉淀;
(6)干燥:将5步得到的沉淀,进行真空干燥,-0.08MPa,70℃,得黄芩苷提取物;
(7)检测:收集产物送检,黄芩苷提取物中的黄芩苷的含量为85%,黄芩苷的收率为90%。
上述实施例中,实施例3制得的黄芩苷提取物中的黄芩苷的含量为85%,黄芩苷的收率为90%,其为最优方案。
对比例1
本对比例与和实施例3基本相同,区别仅在于,所述步骤(1)中,乙醇的浓度为75%,最终制得的黄芩苷提取物中的黄芩苷的含量为70%,黄芩苷的收率为71%。
实施例1~3及对比例1制得的黄芩苷提取物中的黄芩苷的含量的检测方法如下:
1.色谱条件:
色谱柱:ZORBAX SB-C18,4.6×250mm;
检测波长:280nm;
检测器:VWD;
柱温:30℃;
流速:1.0ml/min;
流动相:甲醇∶水∶磷酸=47∶53∶0.2。
2.对照品溶液的制备:
取黄芩苷对照品约0.01g,精密称定,至25ml量瓶中,加甲醇超声溶解,并定容至刻度,摇匀,即得。
3.供试品溶液的制备:
精密称取本品粉末约10mg置25ml容量瓶中,加色谱甲醇溶液超声溶解,冷却至室温后用加色谱甲醇溶液定容至刻度,摇匀,用0.45μm微孔滤膜过滤即得供试品溶液,即得。
4.测定法:
分别精密移取对照品溶液和供试品溶液各10μl,注入液相色谱仪,以法测定,即得。
按外标法以峰面积计算。
5.计算:
A样:供试品峰面积;
W标:对照品称量(g);
V样:供试品稀释倍数(ml);
A标:对照品峰面积;
W样:供试品称量(g);
V标:对照品稀释倍数(ml)。
实施例1~3及对比例1制得的黄芩苷提取物中的黄芩苷的收率%={产物黄芩苷净量g/原料黄芩苷净量g}×100%。
上述说明并非对本发明的限制,本发明也并不限于上述举例。本技术领域的普通技术人员在本发明的实质范围内,做出的变化、改型、添加或替换,也应属于本发明的保护范围。
Claims (7)
1.一种黄芩苷提取物的制备方法,其特征在于,包括如下步骤:
(1)提取:称取黄芩原料,打粉过20目,加入生药材8倍量80%乙醇,加热回流浸提2次,每次2h;
(2)过滤:减压抽滤,得到滤液;
(3)浓缩:将2步的滤液减压浓缩为无醇味,浓缩液于78~82℃保温,同时用稀盐酸调pH为1~2,静置;
(4)离心:用离心机离心,收集沉淀;
(5)水洗:将4步得到的沉淀,加5BV水,充分搅拌,使其成为悬浮液,再次进行离心,收集沉淀;
(6)干燥:将5步得到的沉淀,进行真空干燥,得黄芩苷提取物。
2.如权利要求1所述的一种黄芩苷提取物的制备方法,其特征在于,所述步骤(3)中,所述减压浓缩的条件为-0.080Mpa,50~80℃。
3.如权利要求1所述的一种黄芩苷提取物的制备方法,其特征在于,所述步骤(3)中,所述保温的温度为80℃。
4.如权利要求1所述的一种黄芩苷提取物的制备方法,其特征在于,所述步骤(3)中,所述保温的时间为80min。
5.如权利要求1所述的一种黄芩苷提取物的制备方法,其特征在于,所述步骤(3)中,所述静置的时间为24h。
6.如权利要求1所述的一种黄芩苷提取物的制备方法,其特征在于,所述步骤(6)中,所述真空干燥的条件为-0.08MPa,70℃。
7.一种黄芩苷提取物,其特征在于,采用如权利要求1~6任意一项所述的一种黄芩苷提取物的制备方法制备得到。
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Publication number | Priority date | Publication date | Assignee | Title |
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CN1751708A (zh) * | 2004-09-21 | 2006-03-29 | 中国农业大学 | 一种黄芩有效成分的提取方法 |
CN105001285A (zh) * | 2015-06-29 | 2015-10-28 | 兰捷 | 一种从黄芩中提取黄芩苷的方法 |
CN105131062A (zh) * | 2015-08-12 | 2015-12-09 | 山西大学 | 一种黄芩提取物的制备方法 |
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CN1751708A (zh) * | 2004-09-21 | 2006-03-29 | 中国农业大学 | 一种黄芩有效成分的提取方法 |
CN105001285A (zh) * | 2015-06-29 | 2015-10-28 | 兰捷 | 一种从黄芩中提取黄芩苷的方法 |
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CN114634538B (zh) * | 2022-03-25 | 2024-01-26 | 杭州佳嘉乐生物技术有限公司 | 一种稀盐水正负压提取黄岑苷的方法 |
CN114634538B9 (zh) * | 2022-03-25 | 2024-05-03 | 杭州佳嘉乐生物技术有限公司 | 一种稀盐水正负压提取黄芩苷的方法 |
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