甘草流浸膏中甘草酸含量测定方法的建立

摘 要 目的:建立HPLC色谱法测定甘草流浸膏中甘草酸铵的含量。方法: 采用HPLC色谱法在Daminsil C₁₈(250 mm×4.6 mm,5 μm) 色谱柱上梯度洗脱分离,乙腈-0.1%磷酸为流动相,梯度洗脱,检测波长为250 nm,流速为1.0 ml·min^-1,柱温为30℃。结果:甘草酸铵在0.046 8～0.234 0 mg·mL^-1范围内线性关系良好,平均回收率为97.83%,RSD为0.39%（n=9）。结论: 该方法准确、灵敏度高、重现性好、简便可行,可作为含有甘草流浸膏制剂的质量控制方法。     

甘肃金塔甘草5种微量元素含量比较研究

目的:对甘肃金塔产野生与栽培甘草中所含5种微量元素进行比较研究.方法:火焰原子吸收法.结果:甘肃金塔甘草5种微量元素含量由高到低依次为Ca、Mg、Fe、Zn、Cu;不同品种、年限的野生与栽培品微量元素含量差异较大.结论:微量元素的含量对药材的质量评价与控制有一定的参考价值;金塔黄甘草品质较优,建议加强对黄甘草优质种苗堵育、质量控制等综合利用研究.     

甘草黄柏洗剂提取工艺的研究

目的研究甘草黄柏洗剂的提取工艺。方法采用高效液相色谱（HPLC）法,以小檗碱的提取率为评价指标,分别对甘草黄柏合煎液及合并液进行测定。结果小檗碱含量在甘草黄柏合煎液与合并液之间存在明显差异。结论在制定甘草黄柏洗剂的提取工艺时,以黄柏与甘草分煎后再合并,有利于黄柏中小檗碱的充分利用。     

拆方研究补中益气汤中黄芪 甘草及全方的免疫调节作用

目的　检测补中益气汤中黄芪、甘草及全方对病态机体的免疫调节作用。方法　分 7组检测全方中黄芪、甘草及全方缺黄芪、缺甘草组方对利血平制备的脾虚小鼠的 5项非特异性免疫功能的影响进行研究。结果　黄芪能使Hb明显升高 ,单味甘草对某些免疫功能不起作用甚至起抑制作用 ,缺甘草组方作用低于全方 ,全方能明显提高机体免疫功能。结论　黄芪是方中主要升高Hb药物 ;方中甘草起到特殊的调节作用。     

肠安口服液的质量标准研究

目的:制定肠安口服液的质量标准。方法:采用薄层色谱法定性鉴别黄芩、芍药和甘草,用高效液相色谱法测定制剂中黄芩苷的含量。以C18化学键合硅胶为固定相,以甲醇-水-磷酸(50∶50∶0.3)为流动相,检测波长为280nm。结果:定性鉴别色谱特征明显,重现性好。黄芩苷在9.6~57.6μg/mL范围内呈良好的线性关系,r=0.9998,平均回收率为98.70%,RSD=3.10%。结论:上述方法可靠、实用,可有效地控制该制剂的质量。     

甘草活性成分抗呼吸道合胞病毒作用

目的研究甘草抗病毒活性成分（GX）体外抗呼吸道合胞病毒（RSV）的作用。方法采用中性红实验和观察细胞病变（CPE）法,以利巴韦林为阳性药,测定GX对RSV的抑制作用。结果GX的半数中毒浓度（TC50）为460.00μg/ml,半数有效抑制浓度（EC50）为23.53μg/ml,治疗指数（TI）为19.55;GX在RSV感染Hela细胞2,4,6,8,10 h后给药,对RSV复制均有明显的抑制作用（P〈0.01）;且GX对RSV有中和作用。结论GX在体外对RSV复制有明显的抑制作用。     

抗感冒颗粒的薄层色谱和含量测定研究

目的建立抗感冒颗粒的质量标准。方法采用薄层色谱法对处方中黄芩、甘草、桔梗进行鉴别;用高效液相色谱法测定制剂中黄芩苷的含量。采用AichromBond-AQ-C18色谱柱(4.6mm×150mm,5μm);流动相:甲醇-水-磷酸(43∶57∶0.2);流速:1.0mL/min;柱温:30℃;检测波长:280nm;进样量:10μL。结果薄层色谱专属性强;黄芩苷的线性范围为0.0496～0.2976μg,r=0.9997,平均加样回收率为101.80%,RSD=1.86%(n=6)。结论该方法简便、准确,重现性好,可作为抗感冒颗粒的质量控制标准。     

藿香祛暑软胶囊的薄层色谱研究

目的完善藿香祛暑软胶囊的质量标准。方法采用薄层色谱法分别对广藿香、白芷、紫苏叶、苍术、法半夏、茯苓和甘草进行鉴别。结果薄层色谱上均检出有关药材的特征斑点,薄层色谱斑点显色清晰,且阴性对照无干扰。结论本方法专属性强,操作简单,重现性好,可作为藿香祛暑软胶囊的质量控制。     

甘草水煎剂对变异链球菌生长和产酸影响的体外研究

目的研究甘草水煎剂对体外培养的变异链球菌的抗菌活性。方法取粒径为0.2～3.2 mm的甘草颗粒加去离子水煎煮后过滤,滤液为实验用甘草水煎剂。采用液体稀释法测定甘草水煎剂对变异链球菌的最低抑菌浓度（MIC）和最低杀菌浓度（MBC）。在不同浓度甘草水煎剂中培养变异链球菌,分别于培养0﹑3﹑7﹑12﹑23、40 h时测定细菌悬液光密度值和培养液pH值,绘制变异链球菌的生长曲线和产酸曲线。结果甘草水煎剂对变异链球菌的MIC为50 mg·mL-1,浓度小于等于100 mg·mL-1的甘草水煎剂对变异链球菌无杀菌作用。甘草水煎剂对变异链球菌生长的抑制作用随浓度的增加而增强。甘草水煎剂对变异链球菌的产酸有一定的抑制作用,在培养12 h时抑制作用最强。结论甘草水煎剂对体外培养的变异链球菌生长和产酸均有抑制作用。     

Comprehensive Metabolic Profiling of Modified Gegen Qinlian Decoction by Ultra-High-Performance Liquid Chromatography-Diode Array Detection-Q-Exactive-Orbitrap-Electrospray Ionization-Mass Spectrometry/Mass Spectrometry and Application of High-Performance Thin-Layer Chromatography for its Fingerprint Analysis

Objective: Gegen Qinlian decoction(GQD) is a classical traditional Chinese medicine formulation which has been used for almost 2000years. At Guang’anmen Hospital,Beijing, a modified GQD version (mGQD) with seven instead offour herbal ingredients has been applied to treatType 2 diabetes. Quality control is a crucial prerequisite for the therapeutic application of herbal medicines. For the identification of products derived from classical GQD, the Chinese Pharmacopeia requiresthe analysis of only three marker compounds. Because mGQD is a more complex mixture containing seven herbs and hundreds of constituents,thepharmacopoeiamethodforGQDisinadequate.Materials and Methods: Amore comprehensive characterization of the formula''s constituents has been developed using ultra?high?performance liquid chromatography?diode array detection (UHPLC?DAD)?Q?Exactive?mass spectrometry (MS) in electrospray ionization positive and negative mode. Moreover, a new method for the fingerprint analysis of mGQD via high-performance thin-layer chromatography (HPTLC) has been established. Results: Altogether, 91 compounds have been assigned to their originating plants and 84 substances were identified either by comparison with authentic references or with data from the literature. The HPTLC method is based on the application of two different mobile phases and is able to detect both lipophilic and hydrophilic constituents of mGQD. Conclusions:ThemodifiedGQDwasextensivelycharacterizedby UHPLCcombined with DAD and Q?Exactive Orbitrap high?resolution MS detection, leading to the assignment and identification of compounds present in the decoction.In addition, a newmethod forthefingerprint analysis ofthemGQDusingHPTLCwas established,which allowsfast and simple identification of the herbal ingredients in the mixture.