人参茎叶总皂苷中人参皂苷Re的含量分析

目的：分析人参茎叶总皂苷中人参皂苷R。的含量,为人参总皂苷的质量控制提供依据。方法：色谱柱：Diamonsil C18（4．6mm×25mm,5μm）,保护柱：DIKMAEasyGuardC18（10mm×4．6mm）,流动相：乙腈-0．5％冰醋酸水溶液,梯度洗脱,流速：1．25mL／min;EISD：漂移管温度40℃,载气压力3．5bar,放大系数为7。结果：标准曲线：C=1．191×10^-7A-0．1876,线性范围：0．038～1．14mg／mL,r=0．9993,检出限：20ng（S／N〉3）,加样回收率：96．84％～104．21％。结论：该方法前处理简单,分析准确、快速,可作为人参茎叶总皂苷中人参皂苷Re的含量分析方法。     

UPLC法测定人参总皂苷提取物中7种人参皂苷的含量

目的建立一种同时测定人参总皂苷提取物中7种人参皂苷的超高效液相色谱分析方法,该方法对人参提取物的质量评价更准确、更快捷。方法采用Waters Acquity UPLC BEH C18色谱柱(100mm×2.1mm,1.7μm);乙腈-水为流动相;检测波长:203nm;流速:0.4mL·min~(-1);测定人参皂苷Rg1、人参皂苷Re、人参皂苷Rf、人参皂苷Rb1、人参皂苷Rb2、人参皂苷Rc和人参皂苷Rd的含量。结果测定的各色谱峰均能达到基线分离、分离度大于1.5,7种人参皂苷在各自的范围内有良好的线性关系,且RSD值符合要求。结论 UPLC能代替HPLC测定人参皂苷的含量,该方法灵敏、简单、准确、重复性好。     

三七叶中人参皂苷Rb3及总皂苷质量差异研究

目的:比较不同部位、不同生长年限、不同生长年份的三七叶中皂苷的含量,为三七叶相关产品开发和质量标准升级提供参考.方法:采用HPLC及UV法分别测定人参皂苷Rb3和总皂苷的含量.结果:人参皂苷Rb3及总皂苷主要分布于叶部,在茎和基部仅微量分布.3年生的整体质量优于2年生.不同年份采收的三七叶质量差异较大.结论:不同部位和...     

高效液相色谱法测定人参茎叶总皂苷胶囊中人参皂苷Re的含量

目的:应用高效液相色谱法对人参茎叶总皂苷胶囊中的人参皂苷 Re 进行了含量测定。方法:选用HypersilC_(18)分析柱(250mm×4.6mm,5μm),乙腈-0.05%磷酸溶液(20:80)为流动相,检测波长为203nm,流速为1.0ml/min。结果:线性范围:16～16.0μg(r=0.9999)平均回收率为99.2%,RSD 为1.0%。结论:本法简便,灵敏、准确。     

RRLC法分离分析人参中的人参皂苷Rg1、人参皂苷Re和人参皂苷Rb1

目的：用快速分离液相色谱法分离测定人参中人参皂苷Rg1、人参皂苷Re和人参皂苷Rb1，的含量。方法：采用ZOBAX SB—C18柱（1．8μm，3．0mm×50mm）；流动相：乙腈（A）-水（B），梯度洗脱（0～14min，19％A；14～24min，19％A→36％A；24～26min，36％A）；流速：1．0mL·min^-1；检测波长：203nm；柱温：35℃。结果：人参皂苷Rg1、人参皂苷Re和人参皂苷Rb1的线性范围分别为0．077～1．537μg、0.058～1．156μg和0.078～1．563μg，相关系数均为0．9999。平均加样回收率（n=6）分别为98．3％，98．7％，99．2％；RSD分别为0．9％，1．0％，0．5％。结论：本方法具有快速、准确，重复性好等特点，适合于人参的含量测定。     

人参叶中人参二醇组皂苷降解转化为人参皂苷Rg_3和Rh_2的工艺考察

目的研究人参叶中人参二醇组皂苷降解转化为人参皂苷Rg3、Rh2的最佳工艺,以适应工业化生产的需要。方法用均匀设计法优化降解工艺条件,采用HPLC法测定人参皂苷Rg3、Rh2的含量。结果最佳降解工艺条件为体积分数60%的乙酸、55℃降解1 h。结论该工艺合理、可行,适用于工业化大生产。     

人参蜂王浆胶囊中人参总皂苷含量测定方法探讨

目的：探讨人参蜂王浆胶囊中人参总皂苷含量的测定方法。方法：采用高效液相色谱法,流动相乙腈-0．05％磷酸溶液(100：400);检测波长为203nm,流速1．0ml／min。结果：人参皂苷Rg1：线性范围为1．5μm／ml～12．5μm／ml,回收率为99．3,RDS为0．38％;人参皂苷Re：线性范围为1．0～10．0μm／ml,回收率为99．3,RDS为0．38％。结论：该方法简单,准确,重现性好,用于测定人参蜂王浆胶囊中人参总皂苷的含量结果令人满意。     

人参配伍五灵脂人参总皂苷的含量变化规律研究

目的观察人参配伍五灵脂后人参总皂苷含量的变化规律,探讨两种药物配伍后五灵脂对人参抗衰老作用的影响及机理。方法选取6组不同的人参与五灵脂的用量配比及不同的煎煮方法,用紫外分光光度法进行两味药配伍后的人参总皂苷含量测定。结果二者配伍后人参总皂苷含量下降。结论五灵脂的用量和二者的煎煮方式是影响人参总皂苷含量的两个重要因素。     

西洋参中人参皂苷Rg1人参皂苷Re和人参皂苷Rb1的含量测定

［摘要］目的用快速分离液相色谱法分离测定西洋参中人参皂苷Rg1、人参皂苷Re和人参皂苷Rb1的含量。方法采用ZOBAX SB C18柱（4.6 mm×50 mm,1.8 μm）,流动相：乙腈（A） 0.1%磷酸（B）,梯度洗脱（0～25min,5%A→20%A;～35min,20%A→40%A）;流速：2.0 mL•min 1,测定波长：203 nm,柱温：35 ℃。结果人参皂苷Rg1、人参皂苷Re和人参皂苷Rb1的线性范围分别为0.12～2.49,0.61～12.15,1.42～28.48 μg,相关系数分别为0.999 8,0.999 6,0.999 9;平均加样回收率（n=6）分别为97.8%,98.1%,98.3%;RSD分别为1.0%,0.8%,0.4%。结论该方法具有快速、准确、重复性好等特点,适合于西洋参的含量测定。     

Ocotillone—type Ginsenoside from Leaves of Pannax ginseng

An ocotillone-type ginsenoside,together with 2 known ginsenosids was isolated from leaves of Panax ginseng and identifed as psudoginsenoside-RT5 on the basis of chemical and physicohemical evidences.It has been so far the first example of ocotillone-type ginsenoside disicovered in Panax giunseng and its plausible biotransforrnation athway also discussed.     

超高效液相色谱法测定人参中人参皂苷Re的含量

目的:建立测定人参中人参皂苷Re含量的方法。方法:采用超高效液相色谱法。色谱柱为Waters patened hybrid particle细1.2内39径μg柱·(m5L0-1m范m围×内2.1与m峰m面,1积.7积μm分)值,流呈动良相好为的乙线腈性关-水系((19r=∶801.)9,99检8测);波平长均为加样20回3n收m率。为结9果8.:7人0%参,R皂S苷D=R1e.的23质%(量n=浓6度)。在结0.论53:1本～方法操作便捷、效率高、结果准确,可用于人参的含量测定和质量控制。     

Ginsenoside Re of Panax ginseng possesses significant antioxidant and antihyperlipidemic efficacies in streptozotocin-induced diabetic rats

Diabetes mellitus is characterized by hyperglycemia and complications affecting the eye, kidney, nerve and blood vessel. We have previously demonstrated the occurrence of oxidative stress of streptozotocin-induced diabetic rats, preceded by a depletion in the tissue level of glutathione. In this study, when diabetic rats were treated with ginsenoside Re of Panax ginseng C.A. Meyer, there was a significant reduction in blood glucose, total cholesterol and triglyceride levels. On the other hand, oxidative stress has been implicated in the pathogenesis of diabetes and its complications. It was found that treatment by ginsenoside Re restored the levels of both glutathione and malondialdehyde in the eye and kidney to those found in the control rats. This is the first report demonstrating ginsenoside Re has significant antioxidant efficacy in diabetes, and prevents the onset of oxidative stress in some vascular tissues. Our results demonstrated that ginsenoside Re could lower blood glucose and lipid levels, and exerts protective actions against the occurrence of oxidative stress in the eye and kidney of diabetic rats. Our data also provide evidence that ginsenoside Re could be used as an effective antidiabetic agent particularly in the prevention of diabetic microvasculopathy.     

A pair of 24-hydroperoxyl epimeric dammarane saponins from flower-buds of Panax ginseng

Further investigation on the saponins of the flower-buds of Panax ginseng C. A. Meyer has resulted in the isolation and structural elucidation of a pair of new 24-epimers of dammarane type saponins named ginsenoside I and II. The structures of the epimers were characterized on the basis of chemical and spectral evidence as 3-O-[β-D-glucopyranosyl-(1 → 2)-β-D-glucopyranosyl]-20-S-O-β-D-glucopyranosyl-3β12β20(S)-trihydroxy-24ξ-hydroperoxydammar-25-ene, except for their C-24 configurations. Ginsenoside I is a new triterpene glycoside, and ginsenoside II is a known compound first isolated from a natural plant.     

Ginsenoside Rf2, a new dammarane glycoside from Korean red ginseng (Panax ginseng)

A new dammarane glycoside named ginsenoside Rf₂ has been isolated from Korean red ginseng (Panax ginseng) and its chemical structure has been elucidated as 6-O-[α-L-rhamnopyranosyl (1→2) β-D-glucopyranosyl]dammarane-3β, 6α, 12β, 20(R), 25-pentol by chemical and spectral methods.     

人参叶化学成分研究

人参叶化学成分研究窦德强，陈英杰，马忠泽，翁敏华，文晔，裴玉萍，王志学，徐绥绪，姚新生（沈阳药科大学植物化学教研室，沈阳１１００１５）从人参（ＰａｎａｘｇｉｎｓｅｎｇＣ．Ａ，Ｍｅｙｅｒ）叶中分离得到１６个化合物，用ＦＤ－ＭＳ，１Ｈ－ＮＭＲ，１３Ｃ－Ｎ...     

Studies on dammarane-type saponins in the flower-buds of Panax ginseng C.A. Meyer

From the dried flower-buds of Panax ginseng C.A. Meyer, a new minor dammarane-type triterpene saponin named ginsenoside III together with nine known saponins was isolated. On the basis of spectral and chemical evidence, the structure of the new saponin was elucidated as 3-O-[β-D-glucopyranosyl(1 → 2)-β-D-glucopyranosyl]-20-O-β-D-glucopyranosyl-3β,12β,20(S)-trihydroxy-dammar-25-en-24-one.     

人参与附子配伍后不同制备条件下人参皂苷含量变化的研究

目的:研究人参与附子配伍后不同制备条件对人参皂苷Rg1、Re、Rb1含量的影响。方法:采用高效液相色谱法测定人参配伍附子后水煎液、浓缩膏及不同温度下的干燥细粉中人参皂苷的含量。结果:人参与附子配伍后,浓缩、干燥是人参皂苷类成分损失最多的制备工序。结论:人参与附子配伍浓缩、干燥温度不宜高于80℃。     

高效液相色谱法分析人参、西洋参和三七中的人参皂甙

作者用反相高效液相色谱法测定和比较了人参、西洋参和三七中人参皂甙的组成和含量。本法采用Alttech公司的Adsorbosphere HS C18柱，并以0.005M NaH2PO4^- H3PO4缓冲液（pH3.0）和乙腈－水（50：50）作为梯度洗脱流动相。人参皂甙Rb1、Rb2、Rb3、Rc、Rd、Rf、Ro、Re Rg1可以在一步分析过程中达到基线分离。人参皂甙直接在203nm波长处检测，检测下限在信噪比3：1时为40ng。经改进后用SEP－PAK C18预柱的样品纯化方法，可以大大减少样品提取液中杂质对前沿峰的干扰，而获得平滑的基线背景，结果表明，样品甲醇提取液主要成分人参皂甙的HPLC谱图可作为化学指纹用于三个人参品种的鉴别，并发现野生人参和栽培人参、生参和红参、中国红参和朝鲜高丽参，以及四个不同采收月份的栽培人参中主要人参皂甙成分组成上没有明显的区别，但是在含量上有某些不同。同时对西洋参芦头、主根、细根以及参叶等的九种人参皂甙含量进行了定量和比较。