CN115452981B - 一种基于gc-ms的野坝子不同药用部位的线性判别方法 - Google Patents
一种基于gc-ms的野坝子不同药用部位的线性判别方法 Download PDFInfo
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Abstract
本发明通过用GC‑MS分析含有野坝子药用部位的样品,检测样品中L‑芳樟醇的含量,若L‑芳樟醇的含量大于0.3μg/g,则该样品中野坝子药用部位为野坝子花;并建立了两个线性判别方程识别野坝子叶或野坝子茎,两者相比,若Y叶数值更大,则该样品中野坝子药用部位为野坝子叶,若Y茎的数值更大,则该样品中野坝子药用部位为野坝子茎。
Description
技术领域
本发明涉及一种野坝子不同药用部位的检测方法,具体涉及一种基于GC-MS的野坝子不同药用部位线性判别的方法。
背景技术
野坝子是一种具有特殊香味的药食同源植物。它主要分布在中国西南地区,特别是云南省。在云南当地,它被用凉茶、草药以及蜜源植物。当地的彝族白族等少数民族用它来治疗感冒、发烧、流感、腹泻。研究报道,从野坝子中分离出的许多化合物具有抗病毒、抗癌、抗炎活性,甚至可以缓解阿尔茨海默症症状。另外,野坝子作为地域性较强的特色天然植物,其提取物在卷烟中具有增香、提质和矫味等应用效果,深具优良天然烟用香料的特质,是中式卷烟添加的天然香料潜在资源。
野坝子不同部位其药效结果不同,其中野坝子花中生物活性物质相对含量最高,叶次之,茎的相对含量最少。同时其不同部位提取物产率以及在卷烟中添加效果也差异很大。由于商业利益的驱动,许多不法分子用野坝子茎叶产品冒充或掺杂野坝子花产品中,以获取不法收益。因此,有必要对野坝子花茎叶等不同部位进行鉴别区分。
为了解决以上问题,提出本发明。
发明内容
本发明目的通过以下技术方案实现。
本发明提供了一种基于GC-MS的野坝子不同药用部位的线性判别方法,其包括以下步骤:
步骤(1):用GC-MS分析含有野坝子药用部位的样品;
步骤(2):检测样品中L-芳樟醇的含量,若L-芳樟醇的含量大于0.3μg/g,则该样品中野坝子药用部位为野坝子花;
步骤(3):基于以下判别方程识别野坝子叶或野坝子茎:Y叶=4468.222X1-7344.958X2+37630.614X3-3334.293X4-5977.864X5-18662.183;
Y茎=-586.723X1+1013.489X2-5180.547X3+461.234X4+818.693X5-366.799
其中:X1为氧化石竹烯含量μg/g,X2为香薷酮μg/g,X3为新植二烯含量μg/g,X4为三十碳六烯含量μg/g,X5为桉油烯醇含量μg/g。
野坝子茎和叶的判定方法:两者相比,若Y叶数值更大,则该样品中野坝子药用部位为野坝子叶,若Y茎的数值更大,则该样品中野坝子药用部位为野坝子茎。
优选地,步骤(1)中可具体包括如下步骤:
(11)样品收集
采集一定量需检测样品,均匀分成若干份,每份按一定重量取样,装袋待测;
(12)样品前处理
在10ml离心管中称量0.1g样品,添加1.5ml 1μg/ml氘代甲苯-乙酸乙酯溶液。将混合物超声处理10分钟,在4000rpm下离心8分钟,过滤,取500μL上清液,转移到色谱进样瓶中,准备进行GC-MS分析。
(13)GC-MS检测
将步骤(12)所得的样品溶液,通过直接进样的方式,进行GC-MS检测。
(14)数据处理
归一化:使用内标法进行量化。每个挥发性成分的含量计算如下:
其中:Ci表示测得的挥发性成分的含量;Ai是对应化合物的峰面积;A0表示内标物的峰面积;M0表示内标物的质量;M是所取样品的质量。然后将数据用于统计分析。
其挥发性成分含量值取其多次检测的算术平均值。
当然,步骤(1)也可以用其他取样条件、样品前处理条件或数据处理方法,只要能符合检测原理把各物质的含量检测出来就行。
优选地,步骤(1)中所取样品平均分成份数均不小于6份,每份不少于0.1克。
优选地,步骤(1)中,仪器分析参数如下:
色谱条件:
质谱条件:色谱柱为DB-35GC色谱柱(30m×0.25mm×0.25μm)(安捷伦,美国)。进样口温度为280℃。载气为氦气,流速为1ml/min。进样体积1.0μL,分流进样,分流比为10:1。初始温度为80℃,以60℃/min的速率加热至275℃,然后以1℃/min的速率升高至295℃,并保持1分钟。
传输线和离子源温度分别为300℃和280℃;扫描模式:全扫模式;电离模式为70ev电子碰撞;溶剂延迟时间为2min。当然,步骤(1)中也可以使用其他仪器分析参数,只要能把本发明关心的特征物质含量测出来就行。
相对于现有技术,本发明具有以下有益效果:
1、本发明首次通过GC-MS分析实现野坝子不同野坝子的药用部位及产品的准确鉴别,同时,可以对产品挥发性药用成分进行初步解析。
2、本发明首次通过建立判别方程对野坝子不同的药用部位进行鉴别,该方法简便,鉴别野坝子花只需要检测L-芳樟醇的含量;鉴别野坝子茎和叶,只需将氧化石竹烯、香薷酮、新植二烯、三十碳六烯和桉油烯醇的含量值依次代入步骤(3)的两个判别方程,分别得到Y叶和Y茎的数值,通过比较两者大小就能判别出茎和叶,且结果可靠,能够在实际生活中得到广大应用。
具体实施方式
下面结合具体实施例对本发明进行说明,但本发明的实施方式不限于此。实施例中未注明具体条件的实验方法,通常按照常规条件以及手册中所述的条件,或按照制造厂商所建议的条件所用的通用设备、材料、试剂等,如无特殊说明,均可从商业途径得到。
实施例1
按照上述步骤(1),分别取野坝子叶1、野坝子茎1、野坝子花1和野坝子茎2等4个样品每个分为6份,进行分析及处理,得到相应的GC-MS数据如表1所示:
表1不同野坝子部位样品的GC-MS数据
ND表示该成分未检测到,计算时其含量按0μg/g计算。
野坝子花的判别:由于样品野坝子花1的L-芳樟醇含量大于0.3μg/g,可以直接判定为野坝子花,其他三个样品野坝子茎1、野坝子叶1、野坝子茎2的L-芳樟醇小于0.3μg/g,表明它们不是野坝子花,需要进行下一步的鉴别。
将它们对应成分含量值分别代入步骤(3)中的判别方程式,所得结果如表2所示:
表2样品判别方程值及判别结果
ID | Y叶 | Y茎 | 判别结果 |
野坝子叶1 | 21429.96682 | -5843.62496 | 野坝子叶 |
野坝子茎1 | -23004.17166 | 264.67416 | 野坝子茎 |
野坝子茎2 | -23091.89922 | 277.84888 | 野坝子茎 |
实验结果表明,该判定方法判定结果与样品实际部位一致,表明本发明方法具有较好的可靠性。
为了进一步验证方法的可靠性,分别选择了4个野坝子茎,4个野坝子叶和4个野坝子花样品,样品本身在取样、制样后无法在直观视觉上没有区别,然后在未告知检测人员具体样品来源的情况下,请检测人员纯粹基于本发明的方法对各样品进行部位判别,判别结果如下表3所示:
表3方法的验证结果
基于本发明的方法做做出的识别结果与样品来源完全吻合,由表3可知,本发明方法的野坝子茎,野坝子叶和野坝子花的预测准确度都为100%,可以用于野坝子药用部位的准确预测。
Claims (2)
1.一种基于GC-MS的野坝子不同药用部位的线性判别方法,其特征在于,包括以下步骤:
步骤1:
样品前处理:
在10ml离心管中称量0.1g样品,添加1.5ml 1μg/ml氘代甲苯-乙酸乙酯溶液,将混合物超声处理10分钟,在4000rpm下离心8分钟,过滤,取500μL上清液,转移到色谱进样瓶中,准备进行GC-MS分析;
用GC-MS分析含有野坝子药用部位的样品:
色谱条件:
色谱柱为DB-35GC色谱柱,所述色谱柱的规格为30m×0.25mm×0.25μm;进样口温度为280℃;载气为氦气,流速为1ml/min;进样体积1.0μL,分流进样,分流比为10:1;初始温度为80℃,以60℃/min的速率加热至275℃,然后以1℃/min的速率升高至295℃,并保持1分钟;
质谱条件:
传输线和离子源温度分别为300℃和280℃;扫描模式:全扫模式;电离模式为70ev电子碰撞;溶剂延迟时间为2min;
步骤2:检测样品中L-芳樟醇的含量,若L-芳樟醇的含量大于0.3μg/g,则该样品中野坝子药用部位为野坝子花;
步骤3:基于以下判别方程识别野坝子叶或野坝子茎:
Y叶=4468.222X1-7344.958X2+37630.614X3-3334.293X4-5977.864X5-18662.183;
Y茎=-586.723X1+1013.489X2-5180.547X3+461.234X4+818.693X5-366.799;
其中:X1为氧化石竹烯含量μg/g,X2为香薷酮μg/g,X3为新植二烯含量μg/g,X4为三十碳六烯含量μg/g,X5为桉油烯醇含量μg/g;
两者相比,若Y叶数值更大,则该样品中野坝子药用部位为野坝子叶,若Y茎的数值更大,则该样品中野坝子药用部位为野坝子茎。
2.根据权利要求1所述的方法,其特征在于,步骤1中所取样品平均分成份数均不小于6份,每份不少于0.1克。
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