CN108120779B - 一种快速鉴定广西莪术中化学成分的分析方法 - Google Patents
一种快速鉴定广西莪术中化学成分的分析方法 Download PDFInfo
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Abstract
本发明提供了一种快速鉴定广西莪术中化学成分的分析方法,所述广西莪术提取物通过超临界二氧化碳萃取得到。将提取物通过超高效超临界流体色谱‑四极杆飞行时间质谱联用仪检测,UNIFI软件可自动进行数据处理,自动在UNIFI内置的天然产物数据库和自建姜黄属化学成分数据库内检索,鉴定结果自动显示,并且结构是否合理也自动通过二级碎片结构匹配进行确证。无法通过内置的天然产物数据库和自建姜黄属化学成分数据库鉴定的成分,可自动搜索在线数据库,然后自动通过二级碎片结构匹配来确证化合物。该方法快速、准确地实现了对广西莪术中化学成分的检测与鉴定,具有准确、操作简单、高通量、高效率和绿色环保等优点。
Description
技术领域
本发明涉及植物提取物的化学成分鉴定分析方法,具体涉及一种快速鉴定广西莪术中化学成分的分析方法。
背景技术
广西莪术(Curcuma kwangsiensis S.G.Lee&C.F.Liang)为姜科姜黄属植物,多年生草本,产我国广西、云南,栽培或野生于山坡草地及灌木丛中。本种的根茎即为中药莪术的一种。2015年版《中国药典》记载其性味与归经为辛、苦,温。归肝、脾经。功能与主治为行气破血,消积止痛。用于癥瘕痞块,血瘀经闭,胸痹心痛,食积胀痛。现代药理研究发现,中药莪术具有抗癌、抗菌、抗病毒、抗氧化、抗溃疡、抗炎及促进微循环等作用。广西莪术中一般含有两大类活性成分,二苯庚烷类化合物和挥发油类化合物。除此之外,还含有二萜类、多糖类、酚酸类和甾醇类等化学成分。广西莪术富含挥发油,是其有效成分群,多为单萜和倍半萜类化合物。
中药的功效已为几千年的历史和现代临床实验所肯定,但中药作用的物质基础和作用机理的研究还面临诸多挑战。中药作用物质基础的研究首先是要了解中药的化学成分。所有天然产物的研究都要源于化学成分分析,成分分析的研究一直以来也面临着许多挑战。传统的化学成分分析方法复杂,耗时且低效。目前,对广西莪术化学成分研究有以下3种方法:1.购买相关对照品,与样品中的组分进行对比,这种方法的缺点是成本高,且绝大多数化学成分无对照品。2.采用各种分离制备手段对组分进行分离纯化,这种方法的缺点是盲目性大,耗时太长。3.目前最常见的液质联用解决方法是对每个色谱峰逐一鉴定,通过检索数据库寻找可能的结构信息,然后再查文献进一步匹配二级碎片的数据与裂解途径,最终确定化合物的结构。这些方法和局限性是耗时长、效率低,同时对检测人员的中药及化学背景要求很高。因此,如何对广西莪术及其产品的化学成分的快速分析对广西莪术的研究、产品开发以及产品质量控制具有重要的意义。
超高效超临界流体色谱是以超临界二氧化碳为流动相,配以亚2微米颗粒色谱柱的色谱。超临界二氧化碳为流动相,它比液相所使用的液体流动相以及气相所使用的载气有更多突出的优点。CO2单独使用或与少量助溶剂共同使用作为流动相,流体粘度小,比液相色谱中所使用的液体流动相扩散率更高、更有利于传质。与气相色谱相比,CO2作流动相可在更低的温度下实现分离。超高效超临界流体色谱能够更加精确地改变流动相的强度、系统压力和温度,从而调整出系统的分离度和选择性。当分析结构类似物、异构体、对映体和非对映异构体混合物时,能够更好地控制分析物的保留,从而更好地分离,而这些化合物以任何其他方法分离通常都是很困难的。
中药中有大量的结构类似物和同分异构体。应用液相色谱法、气相色谱法、气质联用法和液质联用法对中药中的结构类似物和同分异构体的分离鉴定通常都是很困难的。广西莪术中化合物种类众多,极性差别大、含量大小不一,并且有大量的同分异构体,对其进行分离鉴定尤其困难。现行的方法不能解决复杂基质广西莪术的物质基质研究。本发明利用超高效超临界流体色谱-四极杆飞行时间质谱联用仪结合自建姜黄属化学成分数据库可快速鉴定广西莪术中的化学成分。
发明内容
本发明的目的是在于提供一种快速、准确,能同时分离鉴定多种化学成分的分析方法,该方法具有准确、操作简单、快速、高通量和绿色环保等优点,可应用于广西莪术及其产品的物质基础研究、质量控制、产品开发等各种与广西莪术相关的分析领域。
为实现上述目的,本发明采用如下技术方案:
一种广西莪术的提取物,所述广西莪术提取物按如下步骤制备得到:
超临界流体萃取:将干燥的广西莪术根茎粉碎,然后放入到萃取罐中,应用超临界流体萃取仪中进行萃取。萃取背压15MPa,萃取剂为超临界二氧化碳,改性剂为乙醇,其比例为0-30%,在温度45-55℃和压力15-25MPa下保持超临界流体充满萃取罐5-10min进行静态萃取;再通过流路切换阀切换,萃取罐中的萃取物在5-10min内由流经萃取罐的超临界流体洗脱,完成动态萃取。萃取次数(静态萃取+动态萃取)1-3次。完成动态萃取后,收集广西莪术萃取液,得到广西莪术提取物,可供超高效超临界流体色谱-四极杆飞行时间质谱联用仪分析。
一种所述的快速鉴定广西莪术中化学成分的分析方法,所述的快速鉴定分析方法为:
取广西莪术提取物,进样至超高效超临界流体色谱-四极杆飞行时间质谱联用仪,所述超高效超临界流体色谱-四极杆飞行时间质谱联用仪的实验条件为:
色谱条件:色谱柱为Torus Diol 130(100*3mm,1.7μm);流动相A为CO2,流动相B:甲醇/异丙醇(3∶1)+0.1%甲酸。梯度洗脱:0-2min,98%A;2-4min,92%A;4-9min,60%A;9-9.5min,98%A;9.5-11min,98%A;9.5-11min,98%A。补偿溶剂为甲醇。进样体积为1μL,流速0.4mL/min,柱温:45℃。
质谱条件:离子化模式:ESI+/ESI-,毛细管电压:2.5kV(ESI+)、2.0kV(ESI-),锥孔电压:40V,离子源温度:120℃,雾化气温度:500℃,雾化气流速:800L/h,锥孔气流速:50L/h。
姜黄属化学成分数据库的建立:查阅国内外报道姜黄属化学成分的相关文献,姜黄属包括广西莪术、莪术(Curcuma phaeocaulis Valeton)、温郁金(Curcuma wenyujinY.H.Chen&C.Ling)、姜黄(Curcuma longa Linnaeus)、郁金(Curcuma aromaticaSalisbury)等药用植物,把这些化学成分的英文名称、分子式和精确分子量录入到Excel表,并画出每种化学成分的结构式,再把Excel表与结构式导入Waters的UNIFI软件中,建立姜黄属化学成分数据库。姜黄属化学成分数据库共收集了211种化合物,包括二苯庚烷类、单萜、倍半萜、二萜、多糖和酚酸类等化合物。
化合物鉴定:把自建姜黄属化学成分数据库导入UNIFI软件后,UNIFI软件可自动进行数据处理,自动在UNIFI内置的天然产物数据库和自建姜黄属化学成分数据库内检索,鉴定结果自动显示,并且结构是否合理也可通过二级碎片结构自动确证。无法通过内置的天然产物数据库和自建姜黄属化学成分数据库鉴定的成分,可自动搜索在线数据库,然后自动通过二级碎片结构来确证化合物。
本发明的有益效果在于:
(1)本发明采用超临界二氧化碳萃取广西莪术,有效地提取和采集广西莪术中的有效成分,成本低,效率高,绿色环保,易于工业化生产和应用。
(2)广西莪术萃取物中成分众多,极性差别大,同分异构体多,通过超高效超临界流体色谱和优化条件获得更好地分离广西莪术提取物中各个组分的方法,为广西莪术中的化学成分鉴定奠定了基础。
(3)通过超高效超临界流体色谱-四极杆飞行时间质谱联用仪对广西莪术提取物的检测,结合自建的姜黄属化学成分数据库、仪器内置天然产物数据库和在线数据库,应用于广西莪术化学成分的检测分析,能实现对广西莪术中化学成分快速准确的分离鉴定,具有操作简单、效率高和高通量等优点。可广泛应用于广西莪术及其产品的分析。该方法也可以拓展到姜黄属的其它药用植物提取物的化学成分快速分析。
(4)超临界萃取应用超临界二氧化碳作为萃取剂,超临界流体色谱应用超临界二氧化碳作为流动相,两者都应用了成本低且无毒超临界二氧化碳,把有毒溶剂的使用和废液处理降到最低水平,极大地节省了成本,同时保护了环境和实验人员健康。
附图说明
图1为广西莪术提取物正负的总离子流色谱图(TIC):(a)为正离子扫描TIC,(b)为负离子扫描TIC。
图2为233。1538的精确提取离子色谱图(EIC)。
图3为8-Hydroxyarturmerone的质谱图:(a)一级质谱图,(b)二级质谱图。
具体实施方式
以下通过具体实施例对本例发明进行进一步说明,但本发明的保护范围并不仅限于此。
1.仪器、试剂与材料
仪器:超临界流体萃取仪(岛津公司,SFE-30A);超高效超临界流体色谱-四极杆飞行时间质谱联用仪,超高效超临界流体色谱仪(Waters,ACQUITY UPC2),四极杆飞行时间质谱仪(Waters,Xevo G2-XS QTof),色谱柱为Torus Diol 130(100*3mm,1.7μm)。
气体:CO2。
试剂:乙醇、甲醇和异丙醇均为色谱纯。
材料:广西莪术根茎的干燥粉末。
2.广西莪术提取物
将2.0g广西莪术根茎干燥粉末放进5mL萃取罐中,用超临界流体萃取仪中进行萃取。萃取背压15MPa,萃取压力20MPa,改进剂为乙醇,其比例为15%,萃取温度50℃,静态萃取时间10min,动态萃取时间10min,萃取次数1次。
3.色谱条件:色谱柱为Torus Diol 130(100*3mm,1.7μm);流动相A为CO2,流动相B:甲醇/异丙醇(3∶1)+0.1%甲酸,梯度洗脱:0-2min,98%A;2-4min,92%A;4-9min,60%A;9-9.5min,98%A;9.5-11min,98%A;9.5-11min,98%A。补偿溶剂为甲醇。进样体积为1μL,流速0.4mL/min,柱温:45℃
4.质谱条件:离子化模式:ESI+/ESI-,毛细管电压:2.5kV(ESI+)、2.0kV(ESI-),锥孔电压:40V,离子源温度:120℃,雾化气温度:500℃,雾化气流速:800L/h,锥孔气流速:50L/h。
5.把自建姜黄属化学成分数据库导入UNIFI软件后,UNIFI软件可自动进行数据处理,自动在UNIFI内置的天然产物数据库和自建姜黄属化学成分数据库内检索,鉴定结果自动显示,并且结构是否合理也可自动通过二级碎片结构匹配来确证。无法通过内置的天然产物数据库和自建姜黄属化学成分数据库鉴定的成分,可自动搜索在线数据库,然后自动通过二级碎片结构匹配来确证化合物。共鉴定出48种化合物,详见表1。
表1:鉴定广西莪术提取物的化学成分
Claims (2)
1.一种快速鉴定广西莪术中化学成分的分析方法,其特征在于:它包括如下步骤:
(1)广西莪术提取物的制备:
将干燥的广西莪术根茎粉碎,然后放入到萃取罐中,应用超临界流体萃取仪进行萃取。萃取背压15MPa,萃取剂为超临界二氧化碳,改性剂为乙醇,其比例为0-30%,在温度45-55℃和压力15-25MPa下保持超临界流体充满萃取罐5-10min进行静态萃取;再通过流路切换阀切换,萃取罐中的萃取物在5-10min内由流经萃取罐的超临界流体洗脱,完成动态萃取,萃取次数1-3次,完成动态萃取后,收集广西莪术萃取液,制备得到广西莪术提取物作为供试品溶液;
(2)检测:取供试品溶液,应用超高效超临界流体色谱-四极杆飞行时间质谱联用仪检测;
色谱条件如下:
色谱柱:Torus Diol规格为100*3mm,1.7μm;流动相:流动相A为CO2,流动相B:甲醇∶异丙醇=3∶1+0 .1%甲酸;梯度洗脱:0-2min,98%A;2-4min,92%A;4-9min,60%A;9-9.5min,98%A;9.5-11min,98%A;9.5-11min,98%A;补偿溶剂:甲醇;流速:0.4mL/min;柱温:45℃;进样量:1μL;
质谱条件如下:
离子化模式:电喷雾离子源正负离子ESI+/ESI-,毛细管电压:正离子ESI+:2.5kV、负离子ESI-:2.0kV,锥孔电压:40V,离子源温度:120℃,雾化气温度:500℃,雾化气流速:800L/h,锥孔气流速:50L/h;
(3)姜黄属植物化学成分数据库的建立:
把已报道姜黄属的广西莪术、莪术、温郁金、姜黄和郁金5种植物的化学成分的英文名称、精确分子量、分子式和结构式,导入UNIFI软件中,建立姜黄属植物化学成分数据库;
(4)化合物鉴定:
UNIFI软件可自动进行数据处理,自动对UNIFI软件内置的天然产物数据库和自建姜黄属化学成分数据库进行检索,鉴定结果自动显示,并且结构是否合理也可通过二级碎片结构自动匹配来确证;无法通过内置的天然产物数据库和自建姜黄属化学成分数据库所鉴定的成分,可通过搜索在线数据库,然后通过二级碎片结构是否匹配来鉴定化合物。
2.根据权利要求1所述的分析方法,其特征在于:检测采用Waters超高效超临界流体色谱-四极杆飞行时间质谱联用仪。
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