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虎梅颗粒中薄荷脑薄层色谱鉴别与虎杖苷含量测定 总被引:1,自引:0,他引:1
摘要:目的建立虎梅颗粒中薄荷脑薄层色谱鉴别与虎杖苷的含量测定方法。方法采用高效液相色谱法,以菲罗门C18柱(250mm×4.6mm,5μm)为色谱柱,乙腈-水(23:77)为流动相,流速为1.0mL/min,检测波长为306nm,以外标法检测。结果虎杖苷进样量在0.00392—0.392μg范围内与峰面积呈良好的线性关系,回归方程为A=3630174.86174C+8616.61377(r=0.9999),平均回收率为99.44%,RSD:0.60%(n=6)。结论该方法专属性强、重现性好,可有效控制虎梅颗粒的质量。 相似文献
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高效液相色谱法测定八珍合剂中芍药苷含量 总被引:1,自引:0,他引:1
目的建立八珍合剂中芍药苷的含量测定方法。方法采用反相高效液相色谱法,以C18柱(250mm×4.6mm,5μm)为色谱柱,以乙腈-0.1%磷酸溶液-三乙胺(13:87:0.04)为流动相,流速为1.0mL/min,检测波长为230nm,柱温为35℃。结果芍药苷进样量在0.05015~1.25375μg范围内与峰面积呈良好的线性关系,r=0.9999(n=6),平均加样回收率为102.6%,RSD为1.8%(n=6)。结论该方法灵敏、简便、结果准确、重现性好,适用于八珍合剂的质量控制。 相似文献
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HPLC法测定金胆片中龙胆苦苷、虎杖苷含量 总被引:1,自引:0,他引:1
目的:建立测定金胆片中龙胆苦苷、虎杖苷含量的HPLC法,分析151批金胆片质量,为金胆片质量标准的统一、完善提供依据。方法:色谱柱:Diamonsil C18(250mm×4.60mm,5μm);流动相:甲醇-水,梯度洗脱;检测波长:288nm;柱温:30℃;进样量10μl。结果:龙胆苦苷线性范围:5~100μg·ml^-1(r=0.9999),平均加样回收率为99.4%,RSD为1.4%(n=6);虎杖苷线性范围:4~80μg·ml^-1(r=0.9998),平均加样回收率为100.4%,RSD为1.3%(n=6)。结论:该方法简便,快速,准确,可用于测定金胆片中龙胆苦苷、虎杖苷的含量。不同厂家生产的金胆片中龙胆苦苷、虎杖苷的含量差异较大。 相似文献
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薄层荧光扫描法测定虎杖中的白藜芦醇和白黎芦醇糖苷 总被引:1,自引:0,他引:1
目的:建立虎杖中白藜芦醇及其糖苷异构体含量的测定方法。方法:以甲醇提取目标组分,以聚酰胺薄膜为固定相,苯-甲醇-甲酸(10:5:1)为展开剂层析分离,用荧光扫描法定量,λEx=306nm,λEm=400nm,线性参数SX=3。结果:4种组分(顺式白藜芦醇及其糖苷和反式白藜芦醇及其糖苷)的线性关系良好,相关系数为0.9942~0.9996,平均回收率为97.6%~98.6%,RSD为1.8%~3.1%。测定4个虎杖样品中反式白藜芦醇和反式白藜芦醇苷的含量分别为0.20%~0.22%和2.04%~2.14%.均未检出可定量测定的顺式异构体。结论:方法简便、快速、灵敏、测定成本低。 相似文献
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HPLC法测定不同地区虎杖的虎杖苷含量 总被引:4,自引:4,他引:4
目的:考察不同产地虎杖中虎杖苷的含量。方法:采用HPLC法测定虎杖中虎杖苷的含量。色谱柱为Intertsil ODS C18柱;流动相为乙腈-水(28:72);检测波长303nm;流速1.0 ml·min-1。结果:线性范围0.219 2-1.97μg,r=0.999 9,加样回收率为97.7%,RSD为2.03%。结论:各地虎杖中虎杖苷含量差异较大。 相似文献
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目的建立测定乙肝抗毒颗粒中芍药苷含量的方法。方法采用高效液相色谱法,以Agilent Eclipse XDB—C18为分析柱(4.6min×250mm,5μm),流动相为乙腈-水(20:80),检测波长230nm。结果芍药苷在0.04-0.48μg范围内线性关系良好(r=0.9994),平均回收率为98.52%,RSD为1.50%(n=6)。结论本方法简便、快速、分离度好,可用于乙肝抗毒颗粒的质量控制。 相似文献
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高效液相色谱法测定复方鱼腥草口服液中黄芩苷和绿原酸含量 总被引:3,自引:0,他引:3
目的建立复方鱼腥草口服液中黄芩苷和绿原酸的含量测定方法。方法采用Shimadzu C18柱(250mm×4.6mm,5μm),黄芩苷测定以甲醇-水-磷酸(45:55:0.2)为流动相,检测波长为315nm;绿原酸测定以乙腈-0.4%磷酸溶液(13:87)为流动相,检测波长为327nm。结果黄芩苷进样量在0.2654—1.3270μg范围内与峰面积线性关系良好,r=0.99996(n=5),平均回收率为100.5%,RSD=1.08%(n=6);绿原酸进样量在0.1072~0.5360μg范围内与峰面积线性关系良好,r=0.99998(n=5),平均回收率为97.26%,RSD=1.41%(n=6)。结论该方法快速准确、结果可靠。 相似文献
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高效液相色谱法测定乙肝宁颗粒中芍药苷含量 总被引:1,自引:0,他引:1
目的用高效液相色谱(HPLC)法测定乙肝宁颗粒中芍药苷含量。方法采用Shimadzu VP—ODS色谱柱(150mm×4.6mm,5μm),流动相为乙腈~0.1%磷酸(15:85),流速为1.0mL/min,检测波长为230nm。结果芍药苷进样量在0.04152-0.4152μg范围内与峰面积线性关系良好(r=0.9995),平均加样回收率为98.59%,RSD=0.69%(n=6)。结论HPLC法简便易行,结果准确,重现性好,可用于测定乙肝宁颗粒中芍药苷含量。 相似文献
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Clinical and in vitro investigations were carried out to test the efficacy of gut lavage, hemodialysis, and hemoperfusion in the treatment of poisoning with paraquat or diquat. In a patient suffering from diquat intoxication 130 times more diquat was removed by gut lavage 30 h after ingestion than was removed by complete aspiration of the gastric contents.Determination of in vitro clearances for paraquat and diquat by hemodialysis showed that, at serum concentrations of 1–2 ppm, such as are frequently encountered in poisoning in man, toxicologically relevant quantities of herbicide cannot be removed from the body. At a concentration of 20 ppm, on the other hand, hemodialysis proved to be effective, the clearance being 70 ml/min at a blood flow rate of 100 ml/min. The efficacy of hemoperfusion with coated activated charcoal was on the whole better. Especially at concentrations around 1–2 ppm, the clearance values for hemoperfusion were some 5–7 times higher than those for hemodialysis.In a patient suffering from paraquat poisoning, both hemodialysis as well as hemoperfusion were carried out. The in vitro results could be confirmed: At serum concentrations of paraquat less than 1 ppm no clearance could be obtained by hemodialysis while by hemoperfusion with activated charcoal quite high clearance values were measured and the serum level dropped down to zero.
Zusammenfassung Klinische Untersuchungen und Laboratoriumsversuche wurden durchgeführt, um die Wirksamkeit von Darmspülung, Hämodialyse und Hämoperfusion bei Paraquat- und Deiquat-Vergiftungen zu prüfen.Bei einem Patienten wurde 30 Std nach Deiquat-Aufnahme durch Darmspülung 130mal mehr Deiquat entfernt als durch vollständige Aspiration des Mageninhaltes. In vitro-Versuche ergaben, daß bei Blutserumkonzentrationen von 1–2 ppm, die bei Vergiftungen oft gemessen werden, durch Hämodialyse keine toxikologisch relevanten Paraquat- oder Deiquat-Mengen entfernt werden können. Dagegen erwies sich die Hämodialyse bei 20 ppm und einer Blutumlaufgeschwindigkeit von 100 ml/min mit einer Clearance von 70 ml/min als wirksam. Die Hämoperfusion mit beschicheter Aktivkohle war in diesen Versuchen aber eindeutig überlegen, denn insbesondere bei Konzentrationen um 1–2 ppm waren die Clearance-Werte 5–7mal höher als bei der Hämodialyse.Die in vitro-Ergebnisse wurden bei einem Patienten mit einer Paraquat-Vergiftung bestätigt: Bei Konzentrationen unter 1 ppm war die Hämodialyse wirkungslos, während durch Hämoperfusion relativ hohe Clearance-Werte erreicht wurden, so daß der Serumspiegel rasch unter die Nachweisgrenze abfiel.相似文献
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Petrikovics I McGuinn WD Sylvester D Yuzapavik P Jiang J Way JL Papahadjopoulos D Hong K Yin R Cheng TC DeFrank JJ 《Drug delivery》2000,7(2):83-89
This study describes a new approach for organophosphorous (OP) antidotal treatment by encapsulating an OP hydrolyzing enzyme, OPA anhydrolase (OPAA), within sterically stabilized liposomes. The recombinant OPAA enzyme was derived from Alteromonas strain JD6. It has broad substrate specificity to a wide range of OP compounds: DFP and the nerve agents, soman and sarin. Liposomes encapsulating OPAA (SL)* were made by mechanical dispersion method. Hydrolysis of DFP by (SL)* was measured by following an increase of fluoride ion concentration using a fluoride ion selective electrode. OPAA entrapped in the carrier liposomes rapidly hydrolyze DFP, with the rate of DFP hydrolysis directly proportional to the amount of (SL)* added to the solution. Liposomal carriers containing no enzyme did not hydrolyze DFP. The reaction was linear and the rate of hydrolysis was first order in the substrate. This enzyme carrier system serves as a biodegradable protective environment for the recombinant OP-metabolizing enzyme, OPAA, resulting in prolongation of enzymatic concentration in the body. These studies suggest that the protection of OP intoxication can be strikingly enhanced by adding OPAA encapsulated within (SL)* to pralidoxime and atropine. 相似文献
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《Critical reviews in toxicology》2013,43(5-6):327-369
AbstractThe uptake of metals from food and water sources by insects is thought to be additive. For a given metal, the proportions taken up from water and food will depend both on the bioavailable concentration of the metal associated with each source and the mechanism and rate by which the metal enters the insect. Attempts to correlate insect trace metal concentrations with the trophic level of insects should be made with a knowledge of the feeding relationships of the individual taxa concerned. Pathways for the uptake of essential metals, such as copper and zinc, exist at the cellular level, and other nonessential metals, such as cadmium, also appear to enter via these routes. Within cells, trace metals can be bound to proteins or stored in granules. The internal distribution of metals among body tissues is very heterogeneous, and distribution patterns tend to be both metal and taxon specific. Trace metals associated with insects can be both bound on the surface of their chitinous exoskeleton and incorporated into body tissues. The quantities of trace meals accumulated by an individual reflect the net balance between the rate of metal influx from both dissolved and particulate sources and the rate of metal efflux from the organism. The toxicity of metals has been demonstrated at all levels of biological organization: cell, tissue, individual, population, and community. Much of the literature pertaining to the toxic effects of metals on aquatic insects is based on laboratory observations and, as such, it is difficult to extrapolate the data to insects in nature. The few experimental studies in nature suggest that trace metal contaminants can affect both the distribution and the abundance of aquatic insects. Insects have a largely unexploited potential as biomonitors of metal contamination in nature. A better understanding of the physico-chemical and biological mechanisms mediating trace metal bioavailability and exchange will facilitate the development of general predictive models relating trace metal concentrations in insects to those in their environment. Such models will facilitate the use of insects as contaminant biomonitors. 相似文献
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Chang Min Kim Kun Ho Son Sung Hwan Kim Hyun Pyo Kim 《Archives of pharmacal research》1991,14(4):305-310
In order to find out the values of the steroid resources for the future use. the compositions and contents of steroidal sapogenins
from 13 domestic plants have been investigated. As a result,Dioscorea nipponica, D. quinqueloba andSmilax china were found to have large amount of diosgenin. And pennogenin inTrillium kamtschaticum andParis verticillata, yuccagenin inAllium fistulosum, hecogenin inAgave americana and neochlorogenin inSolanum nigum were appeared to be major steroidal sapogenins. 相似文献
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《Expert opinion on investigational drugs》2013,22(1):79-86
Advances in the molecular biological knowledge of neuronal nicotinic acetylcholine receptors (nAChRs) have led to a growing interest by the pharmaceutical industry in the development of novel compounds that selectively modulate nAChR function. The ability of (-)-nicotine, an activator of nAChRs, to enhance attentional aspects of cognition in animals and humans, to exert neuroprotective and anxiolytic-like effects, and presumably to mediate the negative correlation between smoking and Alzheimer's (and Parkinson's) Disease, has focused interest on the potential therapeutic utility of modulators of nAChR function for treatment of some of the deficits associated with these progressive, neurodegenerative conditions. Numerous compounds are known which activate nAChRs and which might serve as lead compounds toward the development of such agents. The pharmacologic diversity of neuronal nAChR subtypes suggests the possibility of developing selective compounds which would have more favourable side-effect profiles than existing agents. This broader class of agents, collectively called cholinergic channel modulators (ChCMs), is anticipated to encompass compounds which would have more favourable side-effect profiles than existing agents, which generally exhibit low selectivity. This selectivity may be achieved by preferentially activating some subtypes of nAChRs (i.e., Cholinergic Channel Activators, ChCAs) or inhibiting the function of other subtypes (Cholinergic Channel Inhibitors, ChCIs). An overview of the biology of nAChRs and the rationale for the use of ChCMs for the treatment of dementia related to neurodegenerative diseases are presented, followed by a discussion of lead compounds and compounds under consideration for clinical evaluation. 相似文献
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