HPLC法测定小柴胡颗粒中黄芩苷的含量研究

目的建立小柴胡颗粒中黄芩苷的含量测定方法。方法采用高效液相色谱法。色谱柱为Kromasil100．5ODS2（5μm,1,250mill×4．6mm）,柱温25℃,流动相甲醇-水—O．1mol／L磷酸（45：55：0．2）,流速为lmL／min,检测波长280nm。结果在上述条件下,黄芩苷在0．00272μg/mL-0．0544gg／mL（r=0．9997）范围具有良好的线性关系,平均回收率为99．72,RSD=0．44％。结论本方法测定小柴胡颗粒中的黄芩苷含量操作简单、准确且快速,可作为小柴胡颗粒中黄芩苷的含量测定方法。     

HPLC法测定健儿消食口服液中橙皮苷和黄芩苷的含量

建立一种同时测定健儿消食口服液中的橙皮苷和黄芩苷的高效液相色谱法（HPLC）．样品用甲醇超声提取，采用ZorbaxSB-C18色谱柱上分离，以1％乙酸溶液-乙腈为流动相进行梯度洗脱，检测波长280nin，柱温为25℃时直接测定．橙皮苷在15．5～155．0μg·ml-1内线性关系良好；黄芩苷在58．0～290．0μg·...     

双黄连口服液和双黄连片中黄芩甙的含量测定

采用了反相高效液相色谱法测定双黄口服液和双黄连片中黄芩甙的含量.具体方法是采用C18色谱柱,以甲醇:水:冰醋酸=49.5:50:0.5为流动相,流速1.0ml/min,紫外光度检测器于波长277nm测定,实验结果表明黄芩甙浓度在0.05~0.20mg/ml时呈良好的线性关系,r=0.9988,在双黄连片中回收率为86.70%,RSD为2.27,在双黄连口服液中回收率为97.31%,RSD为2.10.采用本法测定双黄口服液和双黄连片中黄芩甙的含量,方法灵敏,快速,简便,准确,结果稳定,重现性好,能起到控制双黄连片和双黄连口服液质量的作用.     

RP-HPLC法测定清喉咽糖浆的黄芩苷含量

目的 建立反相高效液相方法测定清喉咽糖浆中黄芩苷的含量.方法 SPD-10AVP岛津HPLC色谱仪,LC-ATVP紫外检测器,色谱柱C1s柱(4.6mm×200mm,5 μm),柱温为25°C,流速为1 mL·min-1,检测波长为280 nm,以甲醇-0.4%磷酸溶液(50:50)为流动相.结果 平均回收率为99.55%,RSD%=1.04%,黄芩苷在在12.1～108.9 μg·mL-1范围内线性回归方程为:Y=63.35+20565.67X,r=0.9999.结论 该方法简便、准确,专属性强,测定结果重复性好,为清喉咽糖浆中黄芩苷的定量分析提供了科学有效的方法.     

反相HPLC法测定不同产地黄芩中黄芩苷的含量

应用RP HPLC法对不同产地黄芩的有效部位主成分黄芩苷进行含量测定,初步分析不同产地样品之间的质量差异.色谱条件为:zorbax5μmEclipseXDB C184.6mm×250mm柱,甲醇 0.4%(体积分数)磷酸流动相,280nm紫外检测.分析结果表明不同产地黄芩中黄芩苷的含量差异较大.     

HPLC法同时测定清心明目上清片中栀子苷、连翘苷、黄芩苷和盐酸小檗碱的含量

目的:建立HPLC同时测定清心明目上清片中四种成分(栀子苷、连翘苷、黄芩苷和盐酸小檗碱)含量的方法.方法:色谱柱.AglientTC-C18(4.6mm×250mm,5μm),流动相为乙腈(A)-0.2%磷酸溶液(B),梯度洗脱程序依次为.0~10 min 18%B,10~12 min 20%~30%B,12~14 min30%~16%B,14~20 min 16%~28%B,20~30 min 28%~65%B,30~40 min 65%~80%B,流速0.9 mL·min-1,柱温为25℃,检测波长分别为238 nm(栀子苷和连翘苷)、275nm(黄芩苷和盐酸小檗碱).结果:栀子苷、连翘苷、黄芩苷和盐酸小檗碱分别在0.031 1~0.622 2μg(r=0.999 6),0.533 3~8.000μg(r=0.999 6),0.080 0~1.600 0μg(r=0.999 5),0.115 6~1.155 6μg(r=0.999 4)范围内线性关系良好,平均加样回收率分别为98.4%、98.3%、97.1%、98.2%.结论:本法操作简便、精密度高、重现性好,适用于同时测定清心明目上清片中栀子苷、连翘苷、黄芩苷和盐酸小檗碱的含量.     

蒲地蓝消炎片质量控制方法研究

目的：建立蒲地蓝消炎片的质量控制方法。方法：采用薄层色谱法定性鉴别,展开剂为醋酸乙酯-丙酮-甲酸-水（13：3．5：1：1．5）,用2％FeCl3乙醇溶液显色。采用反相高效液相色谱法测定蒲地蓝消炎片中黄芩苷的含量,色谱条件为Agilent ZORBAXSB C18色谱柱（4．6mm×150mm,5μm）,流动相为甲醇-0．2％磷酸水溶液（42：58）,检测波长为278nm,流速1．0ml／min,柱温30℃。结果：薄层色谱中供试品与对照品在相应位置上具有相同颜色的斑点。黄芩苷在0．2～2．0ng范围呈良好的线性关系,r=0．9998,回收率为99．65％,RSD为1．60％。结论：本法操作简便快速,分离效果好,稳定性高,重现性好,可全面控制蒲地蓝消炎片的质量。     

新疆红景天中红景天苷含量的测定

用反相高效液相色谱法，流动相为甲醇-0．1mol／L磷酸二氢钠(15：85)，紫外检测波长为280nm，流速1．0mL／min，测定新疆产红景天中红景天苷含量，结果表明，红景天苷对照品在10～320μg/mL内线性关系良好，r=0．999。平均加样回收率为96．5％；RSD为3．4％。稳定性良好。该法简便，分离完全，结果可靠，适用于红景天苷的含量测定。     

HPLC法测定喘舒片中黄芩苷含量的测定

对喘舒片中黄芩提取物的含量以黄芩苷计采用HPLE进行测定,结果表明黄芩苷在0．12μg-1．2μg之间呈良好的线性关系,R2=1。平均加样回收率为98．95％,RSD=0．97％,该方法操作简便、可靠、重现性好,能准确控制药品质量。     

HPLC同时测定明目上清片中盐酸小檗碱和黄芩苷的含量

目的:建立同时测定明目上清片中盐酸小檗碱和黄芩苷含量的高效液相色谱方法。方法:Agilent Zorbax Exlipse XDB-C18柱(4.6 mm×250 mm,5μm);柱温为25℃;流动相为甲醇-0.2%磷酸水溶液(45∶55);流速为1.0 mL.min-1;检测波长为265 nm。结果:盐酸小檗碱在1.02~20.40μg.mL-1内线性关系良好(r=0.999 9);黄芩苷在4.54~90.80μg.mL-1内线性关系良好(r=0.999 8);盐酸小檗碱、黄芩苷平均加样回收率为99.2%,101.2%,RSD分别为1.1%和1.6%。结论:本方法简便、准确,重现性好,可用于本制剂的质量控制。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the