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1.
目的:建立高效液相色谱法(HPLC)测定beagle犬血浆中神衰果素的含量的方法。方法:色谱柱采用Diamon-sil ODS C18柱(4.6mm×150mm,5μm),以乙腈-甲醇-0.02mol·L^-1磷酸二氢钠缓冲液(1:9:90)(磷酸二氢钠缓冲液用磷酸调pH3.0)为流动相,原儿茶醛为内标;流速为1.0mL·min^-1;柱温为30℃;检测波长为270nm。结果:HPLC法测定beagle犬血浆中神衰果素的线性范围为21.3-4260μg·L^-1,r=0.9995.低(42.6μg·L^-1)、中(426μg·L^-1)、高(2130μg·L^-1)3个质量浓度的方法回收率分别为(96.7±13.5)%,(95.6±7.6)%,(99.9±1.4)%,日内、日间RSD均小于15%;分析方法的最低定量限为21.3μg·L^-1。结论:本方法适用于神衰果素血药浓度测定和药动学研究。  相似文献   

2.
HPLC法同时测定三七中7种皂苷含量   总被引:4,自引:0,他引:4  
目的:建立HPLC法同时测定三七中7种皂苷含量的方法。方法:Hypersil BDS C18色谱柱(250mm×4.6mm,5μm);流动相:乙腈(A)-水(B)二元梯度洗脱;流速:1.0ml·min^-1;检测波长203nm;柱温:室温。结果:三七皂苷R1,人参皂苷Rb1,Rb2,Rc,Rd,Rg1,Re的线性范围分别为5.6~140μg·ml^-1(r=0.9992)5.8~144μg·ml^-1(r=0.9991)、5.9-148μg·ml^-1(r=0.9997)、6.1~152μg·ml^-1(r=0.9992)、5.8~144μg·ml^-1(r=0.9992)、5.8~146μg·ml^-1(r=0.9990)、5.8~144μg·ml^-1(,=0.9994);回收率98.5%~100.1%。结论:HPLC法可同时并且简单快速分离三七中7种皂苷。  相似文献   

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目的:建立以反相高效液相色谱法测定口腔溃疡涂剂中甲硝唑和盐酸丁卡因含量的方法。方法:色谱柱为Thermo ODS hypersilC18(50mm×4.6mm,5μm);流动相为甲醇-水-乙腈-三乙胺(35:50:15:0.7)(用冰醋酸调pH=6.8);流速1.0ml·min^-1;检测波长为310nm;柱温20℃。结果:甲硝唑和盐酸丁卡因分别在20.2~161.6μg·ml^-1(r=0.9994)和6.68~53.44μg·ml^-1(r=0.9993)范围内线性关系良好,平均回收率分别为99.89%(RSD0.62%)和99.84%(RSD0.67%)。结论:本法简便、快速、重复性好,可用于口腔溃疡涂剂的质量控制。  相似文献   

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目的:建立反相高效液相色谱法测定血浆中阿莫西林浓度的方法。方法:色谱柱为Waterssunfire C18色谱柱(150mm×4.6mm,5μm),流动相为0.05mol·L。磷酸二氢钾溶液.乙腈(96.2:3.8),用磷酸调至pH=3.0,检测波长210nm。结果:血样中阿莫西林的保留时间约为7.7min,最低定量限为0.2μg·ml-1,在0.2—20.0μg·ml-1范围内呈良好线性,平均方法学回收率为97.36%-99.21%,平均提取回收率为89.21%-92.05%,日内和日间RSD〈5%。健康志愿者口服1.0g阿莫西林后药动学参数Cmax为(15.41±4.56)μg·ml-1;t1/2为(1.24±0.20)h;tmax为(1.56±0.38)h;AUC0—8为(47.69±12.25)μg·ml-1·h;AUC0-∞为(48.68±12.52)μg·ml-1·h。结论:本方法稳定、快捷、灵敏,适用于阿莫西林制剂人体药物动力学研究。  相似文献   

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目的:建立一种快速灵敏的同时测定十味龙胆花颗粒中的有效成分龙胆苦苷和小檗碱的HPLC—MS方法。方法:样品用50%甲醇溶液超声提取,采用Zorbax SBC18(4.6mm×250mm,5μm)色谱柱,以含0.2mmol·L^-1醋酸钠的1%醋酸水溶液(A)-甲醇(B)为流动相进行梯度洗脱(0~10min,33%B;19min,60%B;19.01min,80%B),流速0.8mL·min^-1;在ESI正离子模式下,采用选择性离子监测方法(0—14min,m/z 379;14~22min,m/z 336)。结果:龙胆苦苷、小檗碱的线性范围分别为0.030~30.0μg·mL^1(r=0.9992)和0.004~10.0μg·mL^-1(r=0.9990),检出限分别为0.010μg·mL^-1和0.0013μg·mL^-1样品加样回收率为99.2%~103.3%,日内、日间精密度试验的RSD均低于5%。结论:方法快捷、准确,重复性好,可用于药品十味龙胆花颗粒的分析。  相似文献   

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HPLC法测定丹芩颗粒中黄芩苷和丹酚酸B的含量   总被引:2,自引:0,他引:2  
目的:建立高效液相色谱法测定丹芩颗粒中黄芩苷和丹酚酸B的含量。方法:采用Dionex高效液相色谱仪,色谱柱为Diomand C18柱(200mm×4.6mm,5μm);测定黄芩苷的流动相为甲醇-水-磷酸(43:57:0.2),检测波长为280nm;测定丹酚酸B的流动相为甲醇-乙腈-水-甲酸(27:8:63:2),检测波长为286nm;流速为1.0mL·min^-1;柱温30℃。结果:在测定条件下,黄芩苷和丹酚酸B的浓度分别在15.0—90.2μg·mL^-1(r=0.9998)和48.7~207μg·mL^-1(r=0.9999)范围内线性关系良好;方法回收率(n=6)分别为98.3%(RSD=1.4%)和97.1%(RSD=1.2%)。结论:本方法操作简便,准确度高,专属性强,适用于丹芩颗粒的质量控制。  相似文献   

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柱前衍生化HPLC法同时测定阿胶中4种主要氨基酸的含量   总被引:1,自引:0,他引:1  
目的:建立阿胶中羟脯氨酸、甘氨酸、丙氨酸、脯氨酸4种氨基酸的含量测定方法。方法:样品以6mol·L-1盐酸于150℃水解1h,以异硫氰酸苯酯(PITC)为衍生化试剂衍生后进行HPLC分析,采用Phenomenex C18色谱柱(4.6mm×250mm,5μm),柱温为43℃;流动相A为0.1mol·L-1醋酸钠-乙腈(93:7)。流动相B为乙腈-水(4:1),梯度洗脱,流速:1.0mL·min-1;检测波长为254nm。结果:羟脯氨酸、甘氨酸、丙氨酸、脯氨酸的线性范围分别为0.016—0.239I.zg(r=0.9999),0.032~0.483μg(r=0.9998),0.013~0.188μg(r=0.9998),0.018—0.271μg(,=0.9999);加样回收率(n=6)分别为96.20%(RSD:1.3%),98.46%(RSD=1.2%),99.28%(RSD=0.9%),98.65%(RSD=1.7%)。结论:该方法准确、可靠,具有良好的重复性和稳定性,可用于阿胶中羟脯氨酸、甘氨酸、丙氨酸、脯氨酸的检测。  相似文献   

8.
陈军  胡高云  杨华 《中南药学》2007,5(2):121-123
目的建立头孢西丁钠有关物质检测的新的高效液相色谱方法。方法在C18BDS柱(200mm×4.6mm,5μm)上,以乙腈-0.007%磷酸氢二钾溶液(8:92)为流动相,检测波长为260nm,流速为1.0mL·min^-1,柱温为30℃测定注射用头孢西丁钠有关物质。结果注射用头孢西丁钠有关物质与含量均符合标准。结论该方法快速简便、精确,适用于该产品的质量分析。  相似文献   

9.
目的:建立高效液相色谱法同时测定炎菌清搽剂中水杨酸、醋酸曲安奈德、利福平的含量。方法:采用高效液相色谱法,色谱柱为Hypersil C18(4.6mm×250mm,5μm),流动相为甲醇-乙腈-0.075mol·L-1磷酸二氢钾溶液-1.0mol·L-1枸橼酸溶液(30:30:26:4),流速0.8mL·min-1,检测波长254nm,柱温30℃。结果:水杨酸、醋酸曲安奈德、利福平的线性范围分别是:202.24~2022.4μg·mL-1(r=0.9991),5.2—52μg·mL-1(r=0.9994),20.23~202.3μg·mL-1(r=0.9996);日内精密度RSD(n=5)分别是1.4%,1.2%,0.89%;平均回收率(n=9)分别为100.6%,97.8%,100.5%。结论:本方法快捷方便,结果可靠,可作为炎菌清搽剂的质量控制标准。  相似文献   

10.
目的:建立测定人血浆中氨磺必利浓度的高效液相色谱法。方法:以Diamonsil^TM C18(150mm×4.6mm,5μm)为色谱柱,流动相为0.03mol·L^-1磷酸二氢钾(调pH6.4)-乙腈(82:18),流速为1.0mL·min^-1,柱温40℃,检测波长为275mm。以醋酸乙酯-二氯甲烷(80:20)为提取剂。结果:氨磺必利1000.0,400.0,10.0μg·L^-1 3种质量浓度平均回收率分别为97.63%,98.71%,100.29%,日内、日间差RSD均低于8%(n=5);分析方法的最低检测浓度为10.0μg·L^-1;线性范围10.0~1000.0μg·L^-1。回归方程C=136.03 F-3.25,r=0.9996(n=9)。结论:本法灵敏、准确、简单、快速,可用于临床血药浓度监测和药动学研究。  相似文献   

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Zusammenfassung Mittels Gaschromatographie und Dünschichtchromatographie wiesen die Autoren 11 Substanzen nach, welche durch Injektion oder nach Verabreichung per os in die Kniegelenksynovialflüssigkeit eindrangen. In ihrer Aufstellung konnten sie eine direkte Beziehung zwischen Struktur sowie chemischphysikalischen Eigenschaften der Substanz und ihrer Fähigkeit, aus dem Blut in die Kniegelenksynovialflüssigkeit einzudringen, nicht nachweisen, außer der Tatsache, daß Substanzen mit starker Affinität zu Eiweißstoffen erst in höheren Dosen nachweisbar waren.  相似文献   

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Epilepsy affects ≤ 1% of the world's population. Antiepileptic drugs (AEDs) are the mainstay of treatment, although more than a third of patients are not rendered seizure free with existing medications. Uncontrolled epilepsy is associated with increased mortality and physical injuries, and a range of psychosocial morbidities, posing a substantial economic burden on individuals and society. Limitations of the present AEDs include suboptimal efficacy and their association with a host of adverse reactions. Continued efforts are being made in drug development to overcome these shortcomings employing a range of strategies, including modification of the structure of existing drugs, targeting novel molecular substrates and non-mechanism-based drug screening of compounds in traditional and newer animal models. This article reviews the need for new treatments and discusses some of the emerging compounds that have entered clinical development. The ultimate goal is to develop novel agents that can prevent the occurrence of seizures and the progression of epilepsy in at risk individuals.  相似文献   

15.
建立了衍生化顶空毛细管气相色谱-电子捕获检测器(ECD)法测定盐酸达泊西汀中的甲磺酸甲酯(MMS)、甲磺酸乙酯(EMS)和甲磺酸异丙酯(IMS).应用碘化钠衍生技术,使用PW-5毛细管柱,载气为氮气,ECD检测,程序升温.MMS、EMS和IMS分别在0.03~0.30、0.05~0.50和0.05~0.50 μg/ml浓度范围内线性关系良好,平均回收率分别为63.5%、100.3%和96.2%,最低检测限分别为0.30、0.50和0.50 ng/ml.  相似文献   

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目的:研究血浆可溶性细胞间黏附分子-1(sICAM-1)浓度和胎盘组织血管内皮生长因子(VEGF)、胎盘生长因子(PLGF)及其血管内皮生长因子受体1(VEGFR1,Flt-1)、可溶性血管内皮生长因子受体1(sVEGFR1,sFlt-1)mRNA的表达与子前期的关系.方法:采用酶联免疫吸附测定法(ELISA)检测45例子前期患者和45例健康产妇血清sICAM-1的浓度,逆转录-聚合酶链反应(RT-PCR)方法检测胎盘组织中VEGF、PLGF、Flt-1、sFlt-1 mRNA的表达.结果:(1)子前期组sICAM-1水平为(218.45±29.93) μg/L,显著高于对照组的(168.84±19.39) μg/L(P < 0.01).(2)子前期患者胎盘组织VEGF、PLGF、Flt-1、sFlt-1 mRNA的相对表达量显著高于对照组(均P < 0.01).(3)血清sICAM-1浓度与胎盘组织中sFlt-1mRNA的相对表达量呈正相关(r = 0.90,P < 0.01).结论:子前期患者血清sICAM-1浓度升高,其胎盘组织VEGF、PLGF、Flt-1、sFlt-1 mRNA的相对表达量也升高.胎盘组织sFlt-1mRNA的高表达与子前期内皮损伤等有密切关系.  相似文献   

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Parasitic infections caused by pathogenic protozoa affect over 1 billion people worldwide and impose a substantial health and economic burden, particularly on inter-tropical less-developed countries where they are more prevalent. Despite encouraging progress in vaccine development, chemotherapy remains the single most effective, efficient and inexpensive means to control most parasitic infections [1]. However, day to day parasites are becoming increasingly resistant to drugs currently in use, such as Plasmodium towards chloroquine, lending to the start of a promising future for vaccines. Patent applications regarding vaccines for the prevention, control and diagnosis of parasitic protozoan infections are reviewed for the period December 1996 - October 2000. However, vaccines for some of the protozoan infections do not appear in the literature in the period reviewed; only, vaccines against malaria, leishmaniasis, trypanosomiasis, cryptosporidiosis, pneumocystosis, eimeriosis, toxoplasmosis and neosporosis, as well as Babesia microti infections have been found.  相似文献   

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ABSTRACT

Introduction: In pharmaceutical design where future drugs are developed by targeting a specific chosen protein, the evaluation of ligand affinity is crucial. For this very purpose are a multitude of diverse methods which are continuously being improved, which, in turn, makes it difficult to choose which techniques to use in practice.

Areas covered: In this review, the authors discuss both experimental and computational approaches for affinity evaluation. Basic principles, general limitations and advantages, as well as main areas of application in drug discovery, are overviewed for some of the most popular ligand binding assays. The authors further provide a guide to affinity predictions, collectively covering several techniques that are used in the first stages of rational drug design.

Expert opinion: All affinity estimation methods have limitations and advantages that partially overlap and complement one another. Some of the suggested best practices include cross-verification of data using at least two different techniques and careful data interpretation.  相似文献   

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