高效液相色谱法测定五灵颗粒中芍药苷的含量

对五灵颗粒中芍药苷的含量进行测定 .采用KromacilODSC1 8(2 5 0mm× 4 6mm)为固定相 ,甲醇 水 (2 5∶75 )为流动相 ,检测波长为 2 30nm ,柱温为 2 5℃ .该法的RSD为 1 71 % (n =5 ) ,平均回收率为 1 0 0 0 % .     

RR-HPLC法测定复方混悬剂中阿苯哒唑含量

建立阿苯哒唑混悬剂的高效液相色谱含理测定方法 ,方法 :用RP - 8(4 2 5 0mm ,5 μm)色谱柱 ;6 2 %甲醇为流动相 ,流速 1mL·min-1;2 95nm检测 ,本品在 4～ 36 μg·mL-1呈良好线性 (r =0 9999) ,回收率为 99 12 %～10 2 81% ,RSD =1 13 % (n =9)。     

HPLC法测定乙肝扶正清毒颗粒中芍药苷的含量

建立了采用高效液相色谱法测定乙肝扶正清毒颗粒中芍药苷含量的方法。采用 Agilent ZORBAX SB-C18色谱柱（4.6 mm×250 mm,5 μm）,柱温25 ℃,以甲醇-0.05 mol/L磷酸二氢钾（体积比38:62）为流动相,进样量10 μL,流速1.0 mL/min,测定波长230 nm。 结果显示,芍药苷溶液在0.079 1～0.988 0 μg之间呈良好的线性关系(r=0.999 9),加样回收率为98.1％~100.6％,相对标准偏差为1.02%(n=6)。本方法专属性强、灵敏度高、重现性好、操作简便,适用于乙肝扶正清毒颗粒的质量控制。     

RP-HPLC法测定通天口服液中芍药苷的含量

目的 建立通天口服液中芍药苷的含量测定方法。方法 采用高效液相色谱法测定通天口服液中芍药苷含量。色谱柱：Kromasil C18柱（4.6 mm?50 mm,5 μm）;流动相：乙腈-0.1%磷酸梯度洗脱;柱温30℃;检测波长230nm;进样量：10礚。结果 芍药苷在0.339礸/mL-3.782礸/mL范围内与峰面积呈良好线性关系,r=0.9999;芍药苷平均回收率为100.03%,RSD=1.79%（n=6）。结论 该定量方法简便可行、重复性好,可用于通天口服液的质量控制。     

HPLC法测定双黄连片中绿原酸的质量分数

探讨高效液相色谱法测定双黄连片中绿原酸含量的方法 ,控制其质量 .Shim -packVP -ODS(4 6mm× 15 0mm ,5 μm)色谱柱 ,流动相为甲醇 -水 -冰醋酸 (2 0∶80∶1) ,流速为 1 0mL/min ,检测波长为 32 7nm .绿原酸在 0 4 0 8～ 2 0 4 0 μg范围内呈良好的线性关系 ,回归方程为A =2 84 0 95 98C +6 894(r=1.0 0 0 ) ,平均回收率为 10 0 .98% (RSD为 1.13% ) ,重复性RSD为 0 .32 % .方法简便、快速、灵敏、准确、重现性好 ,可作为双黄连片中绿原酸的质量控制标准     

十全大补膏中芍药苷的含量测定

建立了高效液相色谱法测定十全大补膏中芍药苷含量的方法。采用Kromasil C_(18)色谱柱(4.6 mm×250 mm,5μm),以乙腈-水(17∶83,V/V)为流动相,柱温30℃,进样量10μL,检测波长230 nm,流速1.0 mL/min。结果表明,芍药苷在0.083 6~0.627 0μg范围内线性关系良好(r=0.999 8),加样回收率为98.98%~100.47%,相对标准偏差为0.65%(n=6)。本方法专属性强、灵敏度高、重现性好、操作简便,适用于十全大补膏的质量控制。     

HPLC测定和胃平肝丸中芍药苷的含量

目的:建立高效液相色谱法测定和胃平肝丸中芍药苷的含量.方法:采用高效液相色谱法测定和胃平肝丸中芍药苷的含量.色谱柱:Eclipse XDB-C18(4.6 mm×150 mm,5μm)分析柱;流动相:乙腈-水(11∶89);检测波长:232 nm;流速:1.0 m L·min-1;柱温:30℃.结果:芍药苷与其他成分分离良好;芍药苷进样量在0.12~0.60μg范围内有良好的线性关系(r=0.999 9),平均回收率(n=6)为99.12%.结论:该方法简便、准确,重复性好.     

HPLC示差折光分析法测定口香糖中的木糖醇等多种糖醇的含量

建立了一种测定口香糖中多种糖醇的高效液相色谱法 .样品以去离子水超声提取 ,采用NucleosilNH2 色谱柱(2 5 0mm× 4 6mm ,5 μm) ,流动相为乙腈∶水 =85∶15 ,柱温 5 0℃ ,示差折光检测器检测 .所测口香糖中主要成分木糖醇含量在 2 %～ 37%范围内 ,峰面积与其浓度线性关系良好 (r =0 9995 ) .平均回收率为 10 0 4 % ,RSD =1 16 % (n =5 ) .结果表明 ,该法准确、简便、快速 ,能够同时测定口香糖中多种主要组分 .     

RP-HPLC法测定心肌安颗粒中绿原酸和芍药苷

建立RP-HPLC同时测定心肌安颗粒剂中含绿原酸、芍药苷两种有效成分的方法.采用Dia-monsil C18(4.6 mm×250 mm,5μm)色谱柱,以乙腈-0.2%磷酸水为流动相梯度洗脱,流速1.0mL/min,柱温35℃,检测波长230 nm.绿原酸和芍药苷质量浓度分别在20～120μg/mL(r=0.999 9)和30～180μg/mL(r=0.999 8)范围内与峰面积线性关系良好,绿原酸和芍药苷平均加样回收率(n=6)分别为99.38%(RSD=0.96%)和99.91%(RSD=0.82%).三批制剂测定结果显示,含绿原酸量为10.36 mg/g(RSD=0.73%),含芍药苷量为8.18 mg/g(RSD=0.58%).本方法快速、准确,重复性好,可用于同时测定心肌安颗粒剂中绿原酸和含芍药苷的量.     

反相高效液相色谱法测定热塑性酚醛树脂中苯酚的含量

建立了一种测定热塑性酚醛树脂中游离苯酚的反相高效液相色谱法 .采用YWGC18(5 0mmi d × 2 5 0mm ,10 μm)色谱柱 ,以甲醇 水 (体积比为 4 5∶5 5 )作流动相 ,流速为 1 0mL/min ,紫外检测波长为 2 16nm ,灵敏度为0 0 4AUFS .在 2 2 0 4～ 4 4 0 8mg/L的范围内 ,苯酚的峰面积Y与其质量浓度X的线性关系良好 ,回归方程为Y =195 0 3X +2 75 6 8(r=0 9998) .苯酚的加标回收试验的平均回收率为 99 5 % ,RSD为 1 4 % ,苯酚的最小检出量为0 8ng .与其他方法相比 ,该方法具有操作简便、线性范围广、检出限低和回收率高等特点 ,有良好的精密度和准确性     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

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-