CN113063867A - 一种野生苦味枸杞苦味代谢物质检测方法 - Google Patents
一种野生苦味枸杞苦味代谢物质检测方法 Download PDFInfo
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Abstract
本发明涉及一种野生苦味枸杞苦味代谢物质检测方法。一种野生苦味枸杞苦味代谢物质检测方法,包括以下步骤:(1)、枸杞样品制备;(2)将步骤(1)得到的待测样品放入超高效液相色谱仪和质谱仪进行测定;(3)通过质谱中分子离子峰和碎片离子峰的分子量进行匹配;(4)结合紫外吸收光谱特征,对照标准值,鉴定色谱峰的主要化学成分。本发明可对枸杞苦味代谢物进行准确定量研究,该方法具有良好的稳定性、准确性和精密度,为野生苦味枸杞资源的进一步开发利用提供了科学依据。
Description
技术领域
本发明涉及一种野生苦味枸杞苦味代谢物质检测方法。
背景技术
枸杞属(Lycium L.)植物为茄科(Solanaceae)茄族(solaneae Reichb.)枸杞亚族(Lyciinae Wettst.)植物,有80多个种,是一个世界分布属,多分布于暖温带地区,多数种分布南、北美洲,以美国亚利桑那州和阿根廷形成2个分布中心,并以南美洲的种类最为丰富。其中,欧洲3种,亚洲7~8种,澳大利亚1种,美洲约45种,南非6种。我国多数种类分布于西北和华北。
野生苦味枸杞中苦味代谢物质主要为甾体生物碱类、黄酮类,其相关的成为具有抗癌、抗病毒、抗心脑血管病等药用或保健功能,而其中那些野生苦味成分还未有方法去鉴定。
现在关于甾体生物碱类、黄酮类的分析主要有分光光度法、高效液相色谱法、液相色谱-质谱联用法等,但现有的检测方法存在检测结果不稳定,差异性大,不准确的问题。
发明内容
发明目的:基于以上问题,本发明提供一种野生苦味枸杞苦味代谢物质检测方法,该方法具有良好的稳定性、准确性和精密度,可对主要苦味代谢产物进行分类,并对主要化合物进行准确定量,野生苦味枸杞中代谢物质的提取鉴定和深度开发利用提供了技术基础和支持
技术方案:一种野生苦味枸杞苦味代谢物质检测方法,包括以下步骤:
(1)、枸杞样品制备:
(11)取野生红果苦味枸杞成熟果实,加液氮冷冻后置真空冷冻干燥器干燥,研成细粉,
(12)、取0.5mg步骤(1)得到的细粉,加1.5mL甲醇后超声提取,离心,取上清液,合并上清液,氮气吹干,加0.5mL甲醇溶解,经过孔径为0.45μm有机微孔滤膜过滤,制成干样的待测样品;
(2)将步骤(1)得到的待测样品放入超高效液相色谱仪和质谱仪进行测定,液相色谱和质谱的条件如下:
枸杞代谢物质液相色谱条件:
色谱柱,流动相A相-0.1%甲酸水溶液;
流动相B相-甲醇,流速:0.5mL·min-1,进样量:5μL,柱温:36℃,DAD检测波长:370,280,254,230,210nm;
流动相A与流动相B的梯度洗脱比例体积分数为:0min 5%B,60min 100%B,70min100%B;
枸杞代谢物质质谱条件电喷雾离子源(ESI),正离子模式(100-3200m/z),雾化器压力:50psi,
干燥气流速(Drying Gas Flow):10mL·min-1,干燥气温度(Drying Gas Temp):350℃,毛细管电压(Capillary Voltage):4000V,碎裂(Fragmentor)电压:170V,MS/MS碰撞能量(Collision Energy):30V。
(3)通过质谱中分子离子峰和碎片离子峰的分子量进行匹配;
(4)结合紫外吸收光谱特征,对照标准值,鉴定色谱峰的主要化学成分。
进一步地,步骤(4)中的主要化学成分包括甾体生物碱类物质。
进一步地,步骤(4)中的主要化学成分包括黄酮类物质。
与现有技术相比,本发明的有益效果是:本发明可对枸杞苦味代谢物进行准确定量研究,该方法具有良好的稳定性、准确性和精密度,为野生苦味枸杞资源的进一步开发利用提供了科学依据。
附图说明
图1为枸杞样品液质总离子流图,其中:
L-1)宁夏银川栽培甜枸杞品种宁杞7号、L-2)宁夏海源野生苦味枸杞、L-3)宁夏西吉野生苦味紫枸杞、L-4)陕西岐山野生苦味枸杞。注:样品浓度为每0.4g干样制成1mL样品溶液。标记39,40分别代表化合物澳洲茄碱、5,6-二氢澳洲茄碱对应的色谱峰。
图2不同枸杞中甾体生物碱类成分相对含量比较图。
图3不同枸杞中黄酮类成分相对含量比较图。
具体实施方式:
下面对本发明的具体实施方式详细说明。
实施例1:
一种野生苦味枸杞苦味代谢物质检测方法,包括以下步骤:
(1)、枸杞样品制备:
(11)取野生红果苦味枸杞成熟果实2g,加液氮冷冻后置真
空冷冻干燥器干燥,研成细粉;
(12)取0.5mg细粉,加1.5mL甲醇后超声提取,离心,取上清液,合并上清液,氮气吹干,加0.5mL甲醇溶解,经0.45μm有机微孔滤膜过滤,制成含量0.5g干样的待测样品;
(2)将步骤(1)得到的待测样品放入超高效液相色谱仪和质谱仪进行测定,
液相色谱条件:色谱柱,流动相A相-0.1%甲酸水溶液;流动相B相-甲醇,流速:0.5mL·min-1,进样量:5μL,柱温:36℃,DAD检测波长:370,280,254,230,210nm。
流动相A与流动相B的梯度洗脱比例体积分数为:0min 5%B,60min 100%B,70min100%B。
质谱条件:电喷雾离子源(ESI),正离子模式(100-3200m/z),雾化器压力(Nebulizer pressure):50psi,干燥气流速(Drying Gas Flow):10mL·min-1,干燥气温度(Drying Gas Temp):350℃,毛细管电压(Capillary Voltage):4000V,Fragmentor电压:170V,MS/MS碰撞能量(Collision Energy):30V。
(3)通过质谱中分子离子峰和碎片离子峰的分子量进行匹配。
(4)结合紫外吸收光谱特征,对照标准值,鉴定色谱峰的主要化学成分。
进一步,在总离子流图(如图1所示)中,澳洲茄碱(39)和5,6-二氢澳洲茄碱(40)波峰处在宁杞7号缺少的、三种野生苦味枸杞共同具有的波谱区段,是野生枸杞与甜枸杞与栽培甜枸杞含量差异最大的成分。
进一步,甾体生物碱类检测
根据分子量、碎片离子和紫外(UV)吸收谱等信息鉴定得到甾体生物碱类成分澳洲茄碱(39)和5,6-二氢澳洲茄碱(40),如下表1。如图2所示,野生苦枸杞中甾体生物碱类成分澳洲茄碱是宁夏银川栽培甜枸杞品种宁杞7号缺失的化合物;5,6-二氢澳洲茄碱含量明显高于宁夏银川栽培甜枸杞品种宁杞7号。澳洲茄碱、5,6-二氢澳洲茄碱均具有苦味。因此,推测野生苦枸杞甾体生物碱类成分含量高是其苦味主要来源之一。
表1.UPLC-Q/TOF-MS鉴定不同产地枸杞中甾体生物碱类成分
进一步,黄酮类检测
根据分子量、碎片离子和紫外(UV)吸收谱等信息鉴定黄酮类成分4个(32-35),分别为槲皮素-3,7-O-二葡萄糖苷(32)及其异构体(33)、芦丁(34)、山柰酚-3-O-葡萄糖-7-O-鼠李糖苷(35),如下表2、图3。其中化合物32-34于检测图谱中呈现可辨的单一峰。比较四种枸杞中检测出的化合物32-34峰面积(代表含量),黄酮类化合物槲皮素-3,7-O-二葡萄糖苷(32)及其异构体(33)是栽培枸杞宁杞7号所缺失的成分。因此,苦味枸杞中上述黄酮类化合物含量高是其苦味的一个原因。
表2.UPLC-Q/TOF-MS鉴定不同产地枸杞中黄酮类成分
本发明可对枸杞苦味代谢物进行准确定量研究,该方法具有良好的稳定性、准确性和精密度,为野生苦味枸杞资源的进一步开发利用提供了科学依据。
实施例2
一种野生苦味枸杞苦味代谢物质检测方法,包括以下步骤:
(1)、枸杞样品制备:
(11)取野生红果苦味枸杞成熟果实,加液氮冷冻后置真空冷冻干燥器干燥,研成细粉,
(12)、取0.5mg步骤(1)得到的细粉,加1.5mL甲醇后超声提取,离心,取上清液,合并上清液,氮气吹干,加0.5mL甲醇溶解,经过孔径为0.45μm有机微孔滤膜过滤,制成干样的待测样品;
(2)将步骤(1)得到的待测样品放入超高效液相色谱仪和质谱仪进行测定,液相色谱和质谱的条件如下:
枸杞代谢物质液相色谱条件:
色谱柱,流动相A相-0.1%甲酸水溶液;
流动相B相-甲醇,流速:0.5mL·min-1,进样量:5μL,柱温:36℃,DAD检测波长:370,280,254,230,210nm;
流动相A与流动相B的梯度洗脱比例体积分数为:0min 5%B,60min 100%B,70min100%B;
枸杞代谢物质质谱条件电喷雾离子源(ESI),正离子模式(100-3200m/z),雾化器压力:50psi,
干燥气流速(Drying Gas Flow):10mL·min-1,干燥气温度(Drying Gas Temp):350℃,毛细管电压(Capillary Voltage):4000V,碎裂(Fragmentor)电压:170V,MS/MS碰撞能量(Collision Energy):30V。
(3)通过质谱中分子离子峰和碎片离子峰的分子量进行匹配;
(4)结合紫外吸收光谱特征,对照标准值,鉴定色谱峰的主要化学成分。
进一步地,步骤(4)中的主要化学成分包括甾体生物碱类物质。
进一步地,步骤(4)中的主要化学成分包括黄酮类物质。
上面对本发明的实施方式做了详细说明。但是本发明并不限于上述实施方式,在所属技术领域普通技术人员所具备的知识范围内,还可以在不脱离本发明宗旨的前提下做出各种变化。
Claims (3)
1.一种野生苦味枸杞苦味代谢物质检测方法,其特征在于,包括以下步骤:
(1)、枸杞样品制备:
(11)取野生红果苦味枸杞成熟果实,加液氮冷冻后置真空冷冻干燥器干燥,研成细粉,
(12)、取0.5mg步骤(1)得到的细粉,加1.5mL甲醇后超声提取,离心,取上清液,合并上清液,氮气吹干,加0.5mL甲醇溶解,经过孔径为0.45μm有机微孔滤膜过滤,制成干样的待测样品;
(2)将步骤(1)得到的待测样品放入超高效液相色谱仪和质谱仪进行测定,液相色谱和质谱的条件如下:
枸杞代谢物质液相色谱条件:
色谱柱,流动相A相-0.1%甲酸水溶液;
流动相B相-甲醇,流速:0.5mL·min-1,进样量:5μL,柱温:36℃,DAD检测波长:370,280,254,230,210nm;
流动相A与流动相B的梯度洗脱比例体积分数为:0min 5%B,60min 100%B,70min100%B;
枸杞代谢物质质谱条件电喷雾离子源,正离子模式,雾化器压力:50psi,
干燥气流速:10mL·min-1,干燥气温度:350℃,毛细管电压:4000V,碎裂电压:170V,MS/MS碰撞能量:30V;
(3)通过质谱中分子离子峰和碎片离子峰的分子量进行匹配;
(4)结合紫外吸收光谱特征,对照标准值,鉴定色谱峰的主要化学成分。
2.如权利要求1所述的一种野生苦味枸杞苦味代谢物质检测方法,其特征在于,步骤(4)中的主要化学成分包括甾体生物碱类物质。
3.如权利要求1所述的一种野生苦味枸杞苦味代谢物质检测方法,其特征在于,步骤(4)中的主要化学成分包括黄酮类物质。
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