WO2022205518A1 - 一种野菠萝多糖的制备方法 - Google Patents
一种野菠萝多糖的制备方法 Download PDFInfo
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- water
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- wild pineapple
- wild
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B37/00—Preparation of polysaccharides not provided for in groups C08B1/00 - C08B35/00; Derivatives thereof
- C08B37/0003—General processes for their isolation or fractionation, e.g. purification or extraction from biomass
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P3/00—Drugs for disorders of the metabolism
- A61P3/06—Antihyperlipidemics
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P3/00—Drugs for disorders of the metabolism
- A61P3/08—Drugs for disorders of the metabolism for glucose homeostasis
- A61P3/10—Drugs for disorders of the metabolism for glucose homeostasis for hyperglycaemia, e.g. antidiabetics
Definitions
- the invention relates to the technical field of medicine, in particular to a preparation method of wild pineapple polysaccharide.
- the invention provides a preparation method of wild pineapple polysaccharide, comprising the following steps:
- the number of times of steaming and drying is 2 to 3 times, and the conditions for one steaming and drying are: steaming for 30-180 min, and drying at 60-100° C. for 30-120 min.
- the number of times of water extraction is 2 to 3 times, and the conditions of one water extraction are: add 8 to 18 times the weight of water of dried fruit powder, and extract at 90 to 100° C. for 30 to 120 minutes.
- the concentration is concentrated to 40%-60% of the solid
- the drying is vacuum drying at 50-80°C
- the pulverized mesh number is 40-120 mesh.
- the amount of water required for dissolving is 5 to 15 times the weight of the water extract of wild pineapple, the centrifugation is 8000 to 10000 rpm for 6 to 10 minutes, and the filtration aperture is 0.2 to 0.3 nm.
- alcohol precipitation is as follows: adding 95% ethanol to the solution alcohol concentration to 70%, and centrifuging at 8000 rpm for 6-10 min.
- the amount of water required for dissolving is 5 to 15 times the weight of the primary product; the enzymatic hydrolysis concentration of neutral protease is 40000-100000 IU/kg, and the enzymatic hydrolysis conditions are 45 ⁇ 55 °C enzymatic hydrolysis 30 ⁇ 60min; the conditions for inactivating the enzyme are: 90 ⁇ 100°C for 5 ⁇ 20min.
- the concentration is concentrated until the solid content is 40% to 60%; the alcohol precipitation is: add 90% to 100% ethanol to the solution alcohol concentration to 60% to 80%, and let stand for 60 to 60% after stirring. 180min, centrifuge at 7000-9000 rpm for 6-10min.
- the extraction of wild pineapple polysaccharide of the present invention takes fresh and plump wild pineapple fruit as raw material, double-steaming, pulverizing, secondary extraction, ethanol alcohol precipitation to remove impurities, enzymatic hydrolysis and ultrafiltration to remove protein, salt and impurities, concentrated again, ethanol alcohol precipitation
- the purity of the extracted wild pineapple polysaccharide reaches more than 90%, and the wild pineapple polysaccharide exists in the wild pineapple fruit.
- the wild pineapple polysaccharide is continuously improved. Purity, enhance the biological activity of wild pineapple polysaccharide, and enhance the hypoglycemic and hypolipidemic effects of wild pineapple polysaccharide.
Abstract
一种野菠萝多糖的制备方法,包括如下步骤:将野菠萝果进行蒸制、烘干,得到野菠萝干果;将野菠萝干果粉碎,干果粉经水提、浓缩、干燥、粉碎,得到野菠萝水提物;将野菠萝水提物溶解于水,离心,将上清液过滤,得到澄清液体;将澄清液体进行醇沉,将沉淀物烘干、粉碎过筛,得到初级产物;将初级产物溶解于水,过滤后采用中性蛋白酶进行酶解,灭酶、超滤后得到截留液;将截留液浓缩,再次进行醇沉,干燥,粉碎。
Description
本申请要求于2021年03月30日提交中国专利局、申请号为202110341729.5、发明名称为“一种野菠萝多糖的制备方法”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
本发明涉及医药技术领域,特别涉及一种野菠萝多糖的制备方法。
野菠萝是露兜树属植物露兜簕的果实。因形状类似菠萝,岭南民间习称野菠萝。野菠萝在海南分布广泛,资源丰富,民间可作为野果食用,果肉甜味,但果肉中富含维管组织,口感较差,因此不太受欢迎,在海南民间用于疾、咳嗽的治疗。露兜簕的根、叶等部位可作药用,具有清热祛湿、利尿解表、行气平肝等功效。现代药理学研究表明,野菠萝有效成分可以调节糖尿病小鼠的脂质代谢,减少体内脂肪堆积,改善胰岛素抵抗。野菠萝有长期作为野果食用的历史,目前尚未见食用后产生毒副作用的报道,安全性较高,非常有利于开发。
据清《澄海县志》载:露兜树为村俗坊间与筋竹为园,用以为界,谓之露头园,一名露兜。露兜树多用作防风林及园篱,叶的纤维是佳品,可用之编织帽、席、笼屉等工艺品;花香,可提芳香油;果肥厚多肉可食,含氨基酸、糖类,可治肾炎、水肿。
露兜树含有维生素、丰富的矿质元素和多种营养成分,至少含有17种氨基酸,其中7种为人体必需的氨基酸。其中总糖、丝氨酸和谷氨酸质量分数、维生素C、钾质量分数较高。
公开号为CN103784623A发明专利实施例1公开了野菠萝药用植物提取物及其有效部位制备例,取新鲜成熟的野菠萝,置于容器中,加入10-20倍水,浸泡2h后,煎煮3次,每次2h,过滤,浓缩至干得药用植物提取物。药用植物提取物经水溶解后,经D-101大孔吸附树脂分离,以不同浓度的乙醇-水溶液进行洗脱至无色,洗脱液经减压浓缩制得水洗脱物、70%乙 醇洗脱物,浓缩,喷雾干燥后即得有效部位。公开号为CN111265600A发明专利实施例1公开了野菠萝提取物的制备方法:取野菠萝,水洗净,干燥后,每千克加入3升水,浸泡过夜。加热至沸腾后提取1.5h,过滤收集提取液,同法再加水提取一次,合并两次提取液,加热浓缩至流浸膏状,得野菠萝提取物。但上述制备方法得到的多糖含量均较低。
发明内容
有鉴于此,本发明提供了一种野菠萝多糖的制备方法。该方法可大大提高野菠萝多糖的纯度及活性,增强野菠萝多糖的降血糖、降血脂功效。
为了实现上述发明目的,本发明提供以下技术方案:
本发明提供了一种野菠萝多糖的制备方法,包括如下步骤:
(1)将野菠萝果进行蒸制、烘干,得到野菠萝干果;
(2)将野菠萝干果粉碎,干果粉经水提、浓缩、干燥、粉碎,得到野菠萝水提物;
(3)将野菠萝水提物溶解于水,离心,将上清液过滤,得到澄清液体;
(4)将澄清液体进行醇沉,将沉淀物烘干、粉碎过筛,得到初级产物;
(5)将初级产物溶解于水,过滤后采用中性蛋白酶进行酶解,灭酶、超滤后得到截留液;
(6)将截留液浓缩,再次进行醇沉,干燥,粉碎。
作为优选,步骤(1)中,蒸制、烘干的次数为2~3次,一次蒸制、烘干的条件为:蒸制30~180min,60~100℃烘干30~120min。
优选地,步骤(1)中,蒸制、烘干的次数为2次,第一次蒸制、烘干为:蒸制30~180min,60~100℃烘干30~120min;第二次蒸制、烘干为:蒸制30~120min,60~100℃烘干30~120min。
作为优选,步骤(2)中,水提的次数为2~3次,一次水提的条件为:加入干果粉8~18倍重量的水,90~100℃提取30~120min。
优选地,步骤(2)中,水提的次数为2次,第一次水提的条件为: 加入干果粉10~18倍重量的水,90~100℃提取60~120min;第二次水提的条件为:加入干果粉8~15倍重量的水,90~100℃提取30~90min。
作为优选,步骤(2)中,浓缩为浓缩至固形物40%~60%,干燥为50~80℃真空干燥,粉碎的目数为40~120目。
作为优选,步骤(3)中,溶解所需水量为野菠萝水提物重量的5~15倍,离心为8000~10000转/min离心6~10min,过滤的孔径为0.2~0.3nm。
优选地,步骤(3)中,溶解所需水量为野菠萝水提物重量的5~15倍,离心为8000转/min离心6~10min,过滤的孔径为0.22nm。
作为优选,步骤(4)中,醇沉为:加入90%~100%乙醇至溶液醇浓度至60%~80%,7000~9000转/min离心6~10min;烘干的温度为50~80℃。
优选地,步骤(4)中,醇沉为:加入95%乙醇至溶液醇浓度至70%,8000转/min离心6~10min。
作为优选,步骤(5)中,溶解所需水量为初级产物重量的5~15倍;中性蛋白酶的酶解浓度为40000-100000IU/kg,酶解的条件为45~55℃酶解30~60min;灭酶的条件为:90~100℃灭酶5~20min。
作为优选,步骤(5)中,超滤所用超滤膜的截留分子量为8000Da。
作为优选,步骤(6)中,浓缩为浓缩至固形物为40%~60%;醇沉为:加入90%~100%乙醇至溶液醇浓度至60%~80%,搅拌后静置60~180min,7000~9000转/min离心6~10min。
优选地,步骤(6)中,醇沉为:加入95%乙醇至溶液醇浓度至70%,搅拌后静置60~180min,8000转/min离心6~10min。
作为优选,步骤(6)中,干燥的温度为40~80℃。
本发明提供了一种野菠萝多糖的制备方法。该制备方法包括如下步骤:将野菠萝果进行蒸制、烘干,得到野菠萝干果;将野菠萝干果粉碎,干果粉经水提、浓缩、干燥、粉碎,得到野菠萝水提物;将野菠萝水提物溶解于水,离心,将上清液过滤,得到澄清液体;将澄清液体进行醇沉,将沉淀物烘干、粉碎过筛,得到初级产物;将初级产物溶解于水,过滤后采用中性蛋白酶进行酶解,灭酶、超滤后得到截留液;将截留液浓缩,再次进行醇沉,干燥,粉碎。本发明具有的技术效果为:
本发明野菠萝多糖的提取以新鲜饱满的野菠萝果为原料,经双蒸,粉碎,二次提取,乙醇醇沉除杂,酶解超滤除蛋白、盐及杂质,再次浓缩,乙醇醇沉除杂,干燥,粉碎过筛等工艺,提取的野菠萝多糖纯度达到90%以上,野菠萝多糖存在于野菠萝果中,提取过程中,经过不断的除杂工艺,不断的提高野菠萝多糖的纯度,提升野菠萝多糖的生物活性,增强野菠萝多糖的降血糖、降血脂功效。
本发明公开了一种野菠萝多糖的制备方法,本领域技术人员可以借鉴本文内容,适当改进工艺参数实现。特别需要指出的是,所有类似的替换和改动对本领域技术人员来说是显而易见的,它们都被视为包括在本发明。本发明的方法及应用已经通过较佳实施例进行了描述,相关人员明显能在不脱离本发明内容、精神和范围内对本文所述的方法和应用进行改动或适当变更与组合,来实现和应用本发明技术。
本发明提供的野菠萝多糖的制备方法中所用原料、试剂或仪器等均可由市场购得。
下面结合实施例,进一步阐述本发明:
实施例1:
取野菠萝果80kg,洗净,蒸30min,取出,60℃烘干30min,第二次蒸30min,取出,60℃烘干30min,取出,得野菠萝干果13.5kg,粉碎,得野菠萝干粉13.2kg,加10倍水,加热至90℃,提取60min,过滤,得滤液①;滤渣加8倍水,加热至90℃以上,提取30min,过滤,得滤液②,合并滤液①和②,浓缩至固形物为40%,50℃真空干燥,粉碎,过40目筛网,得野菠萝提取物3.23kg。
野菠提取物加5倍水,搅拌溶解,8000转/min离心6min,取澄清液体,溶液过0.22nm的膜,加入95%的乙醇至溶液醇浓度至70%,8000转/min离心6min,取沉淀,沉淀用无水乙醇洗两遍,50℃烘干,粉碎过筛,得野菠萝粗多糖1.13kg。
野菠萝粗多糖加5倍水溶解,过滤,按每kg加入40000国际单位比活力的中性蛋白酶,45℃水解30min,酶解结束后加热至90℃,维持5min进行酶灭活,酶解液过8000Da的超滤膜,得截留液1.6kg,浓缩至固形物为40%,得浓缩液加入95%的乙醇至溶液乙醇含量达到70%,充分搅拌,静置60min,8000转/min离心6min,取沉淀,沉淀用无水乙醇洗两遍,40℃干燥,粉碎过筛,得野菠萝多糖226.15g。
实施例2:
取野菠萝果80kg,洗净,蒸105min,取出,80℃烘干75min,第二次蒸75min,取出,80℃烘干75min,取出,得野菠萝干果13.8kg,粉碎,加14倍水,加热至95℃,提取90min,过滤,得滤液①;滤渣加11.5倍水,加热至95℃以上,提取60min,过滤,得滤液②,合并滤液①和②,浓缩至固形物为50%,65℃真空干燥,粉碎,过80目筛网,得野菠萝提取物3.45kg.
野菠提取物加10倍水,搅拌溶解,8000转/min离心8min,取澄清液体,溶液过0.22nm的膜,加入95%的乙醇至溶液醇浓度至70%,8000转/min离心8min,取沉淀,沉淀用无水乙醇洗两遍,65℃烘干,粉碎过筛,得野菠萝粗多糖1.21kg。
野菠萝粗多糖加10倍水溶解,过滤,按每kg加入70000国际单位比活力的中性蛋白酶,50℃水解45min,酶解结束后加热至95℃,维持12.5min进行酶灭活。酶解液过8000Da的超滤膜,取截留液,浓缩至固形物为50%,加入95%的乙醇至溶液乙醇含量达到70%,充分搅拌,静置120min,8000转/min离心8min,取沉淀,沉淀用无水乙醇洗两遍,60℃干燥,粉碎过筛,得野菠萝多糖238.11g。
实施例3:
取野菠萝果80kg,洗净,蒸180min,取出,100℃烘干120min,第二次蒸120min,取出,100℃烘干120min,取出,得野菠萝干果13.0kg,粉碎,加18倍水,加热至100℃,提取120min,过滤,得滤液①;滤渣 加15倍水,加热至100℃,提取90min,过滤,得滤液②,合并滤液①和②,浓缩至固形物为60%,80℃真空干燥,粉碎,过120目筛网,得野菠萝提取物3.48kg;
野菠萝提取物加15倍水,搅拌溶解,8000转/min离心10min,取澄清液体,溶液过0.22nm的膜,加入95%的乙醇至溶液醇浓度至70%,8000转/min离心10min,取沉淀,沉淀用无水乙醇洗两遍,80℃烘干,粉碎过筛,得野菠萝粗多糖1.20kg。
野菠萝粗多糖加15倍水溶解,过滤,按每kg加入100000国际单位比活力的中性蛋白酶,55℃水解60min,酶解结束后加热至100℃,维持20min进行酶灭活,酶解液过8000Da的超滤膜,取截留液,浓缩至固形物为60%,加入95%的乙醇至溶液乙醇含量达到70%,充分搅拌,静置180min,8000转/min离心10min,取沉淀,沉淀用无水乙醇洗两遍,80℃干燥,粉碎过筛,得野菠萝多糖240.20g。
试验例1:检测试验
多糖检测方法(苯酚-硫酸法):以D-无水葡萄糖为对照,采用硫酸-苯酚显色法,测定多糖含量,标准曲线方程为y=7.66812x+0.00000(r=0.99926),式中x为D-无水葡萄糖质量浓度(mg/mL)、y为吸光度,测定吸光度后,根据回归方程,计算多糖含量。
表1:产品检测
序号 | 产品 | 多糖含量 |
1 | 实施例1 | 92.3% |
2 | 实施例2 | 93.6% |
3 | 实施例3 | 93.0% |
4 | CN103784623A样品 | 62.8% |
5 | CN111265600A样品 | 26.1% |
试验例2:野菠萝多糖降血糖试验
1.材料
选取健康、雄性、清洁级大鼠70只,体重205-230g,由辽宁长生生物技术有限公司提供动物批准文号:SCXK(辽)2019-0008,实验均符合实验动物伦理学要求。
2.主要仪器设备
血糖仪,德国罗氏公司产品;
全自动生化分析仪,日本日立公司产品;
ELISA检测试剂盒,南京森贝伽生物科技有限公司。
3.实验方法
3.1样品制备
本发明制备的野菠萝多糖。
3.2糖尿病模型建立
大鼠禁食不禁水12h,腹腔注射pH4.4的柠檬酸-磷酸氢二钠缓冲液新鲜配制的链脲佐菌素,50mg/kg,造模24h后,尿糖试纸检测尿糖,并尾静脉血采血,检测空腹血糖,尿糖强阳性,空腹血糖≥16.5mmol/L,即为造模成功。
3.3实验
建模成功,将大鼠随机分为厄贝沙坦组、样品低剂量组、中剂量组、高剂量组、CN103784623A样品组及CN111265600A样品组,各10只。
模型组给予生理盐水;厄贝沙坦组给予厄贝沙坦17.5mg/kg;低剂量组给予野菠萝多糖30mg/kg;中剂量组给予野菠萝多糖60mg/kg;高剂量组给予野菠萝多糖120mg/kg;CN103784623A样品组给予CN103784623A样品120mg/kg;CN111265600A样品组给予CN111265600A样品120mg/kg。各组大鼠每日灌胃1次,连续7d。
3.4 FBG、BUN水平检测
末次灌胃后60min,剪尾取血。采用血糖仪检测空腹血糖(FPG)水平;采用全自动生化仪测定尿素氮(BUN)水平。
4.结果及讨论
研究显示,厄贝沙坦组、样品低剂量组、中剂量组、高剂量组的FBG、BUN水平与模型组相比降低较为明显,具有明显差异。其中高剂组FBG 为9.45mmol/L、BUN为9.23mmol/L水平显著降低,具有差异。
CN103784623A样品组及CN111265600A样品组的FBG、BUN水平与模型组相比降低不明显。
表2:野菠萝多糖对大鼠FBG、BUN水平的影响
组别 | 只数 | FBG/(mmol/L) | BUN/(mmol/L) |
模型组 | 10 | 18.02±3.22 | 24.60±3.34 |
厄贝沙坦组 | 10 | 11.87±2.98 ** | 13.73±2.51 ** |
样品低剂量组 | 10 | 15.80±2.61 * | 18.68±2.47 * |
样品中剂量组 | 10 | 11.56±2.08 ** | 13.30±1.99 ** |
样品高剂量组 | 10 | 9.45±1.80 ** | 9.23±1.71 ** |
CN103784623A样品组 | 10 | 15.75±3.24 | 18.71±3.30 |
CN111265600A样品组 | 10 | 17.42±3.11 | 23.52±3.28 |
注:表中可以看出,厄贝沙坦组、样品中剂量组及高剂量组的FBG、BUN水平与模型组相比显著降低(p<0.01),样品低剂量组及CN103784623A样品组的FBG、BUN水平与模型组相比明显降低(p<0.05)。CN111265600A样品组的FBG、BUN水平与模型组相比降低不明显。
试验例3:野菠萝多糖降血脂功效
1、实验药品与器材
阳性对照组的他汀类药物:“辛伐他汀”;
样品:本发明产品野菠萝多糖;
高脂饲料成份:20%猪油,1%胆固醇,0.2%胆盐,18%糖,高营养基础饲料。
器材所用的为16#大鼠灌胃器,精确度为0.1g的台秤及1mL容量的注射器。
2、实验动物
4周龄的健康雄性大白鼠80只,随机分为8组。
3、实验方法
将80只大鼠随机分成8组。分为对照组,高脂模型组,辛伐他汀组,野菠萝多糖高剂量组、中剂量组、低剂量组、CN103784623A样品组及CN111265600A样品组。采用高脂膳食法将高脂模型组,辛伐他汀组,野菠萝多糖高剂量组、中剂量组、低剂量组、CN103784623A样品组及CN111265600A样品组通过喂养高脂饲料4周,为确保造模能够及时成功,每隔一周进行采血化验,直至高脂大鼠造模成功。
对照组高脂模型给予生理盐水,辛伐他汀组给予20mg/kg的辛伐他汀,高剂量组给予160mg/kg的野菠萝多糖、中剂量组给予80mg/kg的野菠萝多糖、低剂量组给予40mg/kg的野菠萝多糖、CN103784623A样品组给予160mg/kg的样品、CN111265600A样品组给予160mg/kg的样品。
实验采用高脂膳食法、对照分析法和腹腔灌胃法及腹腔采血法进行。我们的实验对象选择大白鼠,因为大白鼠不但在药物试剂吸收方面,比小白鼠效果好,无需进行血管注射,而且在采血上也能够顺利采取3-4mL的全血。
表3:血脂四项
注:表中可以看出,样品低剂量组、中剂量组及高剂量组的血脂四项与高脂对照组相比显著降低(p<0.01),辛伐他汀组的血脂四项与高脂对照组相比明显降低(p<0.05)。CN103784623A样品组及CN111265600A样品组的血脂四项与高脂对照组相比无明显降低。
以上所述仅是本发明的优选实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以做出若干改进和润饰,这些改进和润饰也应视为本发明的保护范围。
Claims (10)
- 一种野菠萝多糖的制备方法,其特征在于,包括如下步骤:(1)将野菠萝果进行蒸制、烘干,得到野菠萝干果;(2)将野菠萝干果粉碎,干果粉经水提、浓缩、干燥、粉碎,得到野菠萝水提物;(3)将野菠萝水提物溶解于水,离心,将上清液过滤,得到澄清液体;(4)将澄清液体进行醇沉,将沉淀物烘干、粉碎过筛,得到初级产物;(5)将初级产物溶解于水,过滤后采用中性蛋白酶进行酶解,灭酶、超滤后得到截留液;(6)将截留液浓缩,再次进行醇沉,干燥,粉碎。
- 根据权利要求1所述的制备方法,其特征在于,步骤(1)中,所述蒸制、烘干的次数为2~3次,一次蒸制、烘干的条件为:蒸制30~180min,60~100℃烘干30~120min。
- 根据权利要求1所述的制备方法,其特征在于,步骤(2)中,所述水提的次数为2~3次,一次水提的条件为:加入干果粉8~18倍重量的水,90~100℃提取30~120min。
- 根据权利要求1所述的制备方法,其特征在于,步骤(2)中,所述浓缩为浓缩至固形物40%~60%,干燥为50~80℃真空干燥,粉碎的目数为40~120目。
- 根据权利要求1所述的制备方法,其特征在于,步骤(3)中,所述溶解所需水量为野菠萝水提物重量的5~15倍,离心为8000~10000转/min离心6~10min,过滤的孔径为0.2~0.3nm。
- 根据权利要求1所述的制备方法,其特征在于,步骤(4)中,所述醇沉为:加入90%~100%乙醇至溶液醇浓度至60%~80%,7000~9000转/min离心6~10min;烘干的温度为50~80℃。
- 根据权利要求1所述的制备方法,其特征在于,步骤(5)中,所 述溶解所需水量为初级产物重量的5~15倍;中性蛋白酶的酶解浓度为40000-100000IU/kg,酶解的条件为45~55℃酶解30~60min;灭酶的条件为:90~100℃灭酶5~20min。
- 根据权利要求1所述的制备方法,其特征在于,步骤(5)中,所述超滤所用超滤膜的截留分子量为8000Da。
- 根据权利要求1所述的制备方法,其特征在于,步骤(6)中,所述浓缩为浓缩至固形物为40%~60%;所述醇沉为:加入90%~100%乙醇至溶液醇浓度至60%~80%,搅拌后静置60~180min,7000~9000转/min离心6~10min。
- 根据权利要求1至9中任一项所述的制备方法,其特征在于,步骤(6)中,所述干燥的温度为40~80℃。
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