首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 78 毫秒
1.
目的:建立用高效液相色谱法同时测定中药瓦松中槲皮素和山萘素的方法。方法:采用Thermo C18(4.6 mm×250 mm,5 μm)色谱柱,流动相甲醇-醋酸盐缓冲液(53:47),体积流量1.0 mL·min-1,柱温30 ℃,检测波长360 nm,进样体积为20 μL。结果:槲皮素和山萘素分别在3.92~11.76 mg·L-1r=0.999 8),10.03~30.09 mg·L-1r=0.999 9)线性关系良好。平均回收率分别为99.85%,100.07%;RSD(n=9)分别为0.78%,1.05%。结论:该方法简便快速,结果准确,重复性好,可用于瓦松药材的质量控制。  相似文献   

2.
目的: 建立同时测定林蛙油中α-亚麻酸、亚油酸和油酸含量的HPLC方法。 方法: Alltima C18色谱柱(4.6 mm×250 mm,5 μm), 以乙腈-0.1%磷酸(80:20)为流动相,流速1 mL·min-1,柱温30℃,检测波长203 nm。 结果: α-亚麻酸在4.76~152.16 mg·L-1 (r=1),亚油酸在15.36~491.59 mg·L-1 (r=0.999 8),油酸在47.28~1512.80 mg·L-1 (r =0.999 9) 呈良好的线性关系;平均回收率α-亚麻酸为95.8%,RSD 1.79% (n=6);亚油酸为98.6%,RSD 1.32% (n=6);油酸为99.3%,RSD 1.59% (n=6)。 结论: 该法操作简便,结果准确,专属性强,重复性好,可作为林蛙油质量控制的参考。  相似文献   

3.
HPLC-DAD-ELSD测定泽泻药材中4种三萜类成分含量   总被引:6,自引:2,他引:6  
目的: 建立泽泻药材中23-乙酰泽泻醇C、泽泻醇A、泽泻醇B、23-乙酰泽泻醇B 4个三萜类成分的HPLC-DAD-ELSD同时测定的定量分析方法。 方法: 采用Ultimate XB-C18色谱柱(4.6 mm×150 mm,5 μm),流动相乙腈-水(65:35),流速1.0 mL·min-1,二极管阵列检测器检测波长245 nm,蒸发光散射检测器的漂移管温度60 ℃,雾化器温度55 ℃,气体(氮气)压力20 psi,柱温30 ℃。 结果: 23-乙酰泽泻醇C、泽泻醇A、泽泻醇B、23-乙酰泽泻醇B 4个成分的线性范围分别为1.869~29.90 mg·L-1r=0.999 8),3.731~74.62 mg·L-1r=0.999 7),8.653~138.4 mg·L-1r=0.999 9),4.832~77.31 mg·L-1r=0.999 5),平均加样回收率分别为98.78%(RSD 2.63%),98.05%(RSD 2.72%),98.26%(RSD 2.86%),97.65%(RSD 2.95%)。 结论: 建立的HPLC-DAD-ELSD定量分析方法简便、快捷、准确,可用于泽泻药材的多成分定量分析,为综合评价泽泻的质量提供一种新的技术手段。  相似文献   

4.
目的: 分析苘麻子中脂肪酸的组成并测定主要脂肪酸成分的含量。方法: 采用索氏提取法提取其脂肪酸,经甲酯化处理后,用GC-MS联用仪对其脂肪酸组成进行分析和鉴定。采用毛细管气相色谱法,甲酯化后以二十一酸甲酯为内标同时测定苘麻子中棕榈酸、硬脂酸、油酸和亚油酸的含量。结果: 共分离出10种脂肪酸,占脂肪油总量的99.43%。棕榈酸、硬脂酸、油酸和亚油酸的线性分别为33.6~336 mg·L-1(r=0.999 0), 6.58~65.8 mg·L-1 (r=0.999 9),33.4~334 mg·L-1 (r=0.999 8),128.3~1 283 mg·L-1 (r=0.999 5)。各成分的平均回收率分别为100.4%,100.6%,101.6%,101.0%,RSD分别为1.3%,1.5%,1.6%,2.1% (n=9)。结论: 鉴定了苘麻子中的10种脂肪酸并首次建立了其中4种主要脂肪酸成分的含量测定方法,可为苘麻子的质量评价提供依据。  相似文献   

5.
HPLC同时测定白花蛇舌草中2种蒽醌化合物的含量   总被引:1,自引:1,他引:0  
目的:建立白花蛇舌草药材中2种蒽醌化合物2-羟基-3-甲氧基-7-甲基蒽醌(蒽醌Ⅰ)和2-羟基-1-甲氧基蒽醌(蒽醌Ⅱ)含量测定的方法。方法:采用Eclipse XDB-C18柱(4.6 mm×250 mm,5 μm),以甲醇-水(60:40)等度洗脱,流速1.0 mL·min-1,检测波长272 nm,柱温25 ℃。结果:蒽醌Ⅰ和蒽醌Ⅱ分别在4.0~160 mg·L-1r=0.999 6)和4.0~160 mg·L-1r=0.999 5)线性关系良好,平均加样回收率(n=9)分别为99.27%,99.08%,供试品溶液在24 h内稳定。结论:该方法精密度良好,准确度高,适合于白花蛇舌草药材中2-羟基-3-甲氧基-7-甲基蒽醌和2-羟基-1-甲氧基蒽醌含量的测定。  相似文献   

6.
蛇床子中5种成分的HPLC测定法   总被引:2,自引:0,他引:2  
翁德新  李天傲 《中国中药杂志》2007,32(18):1883-1885
目的:建立对蛇床子药材中花椒毒素、异虎耳草素、香柑内酯、欧前胡素、蛇床子素进行同时测定的RP-HPLC法。方法:采用Alltech C18色谱柱(4.6 mm×250 mm,5 μm),流动相乙腈-0.1%醋酸水溶液,梯度洗脱,流速:1 mL·min-1,检测波长245,325 nm;柱温为40 ℃。结果:花椒毒素、异虎耳草素、香柑内酯、欧前胡素、蛇床子素的线性范围分别为1~20 μg·mL-1(r=0.999 9),1~20 μg·mL-1(r=0.999 9),1~20 μg·mL-1(r=0.999 8),100~1 200 μg·mL-1(r=0.999 7),100~2 000 μg·mL-1(r=0.999 9),回收率均大于95%。结论:本法简便、准确、重现性好,适用于蛇床子中5种成分的同时测定。  相似文献   

7.
目的: 测定消癌平注射液中新绿原酸、原儿茶醛、绿原酸、隐绿原酸、咖啡酸、香草酸和4-香豆素的含量。 方法: Kromasil 100-5 C18色谱柱(4.6 mm×250 mm,5 μm),流动相乙腈-0.2% 磷酸,梯度洗脱,检测波长300 nm;柱温30 ℃,流速0.8 mL·min-1结果: 新绿原酸、原儿茶醛、绿原酸、隐绿原酸、咖啡酸、香草酸和4-香豆酸的线性范围分别为0.1~3.2 mg·L-1(r=0.999 3)、0.025~0.8 mg·L-1(r=0.999 9),0.1~3.2 mg·L-1(r=0.999 8),0.075~2.4 mg·L-1(r=0.999 9),0.037 5~1.2 mg·L-1(r=0.999 9),0.02~0.64 mg·L-1(r=0.999 9),0.01~0.32 mg·L-1(r=0.999 9),加样回收率分别为99.6% (RSD 0.24%),100.0% (RSD 0.15%),98.7% (RSD 1.00%),99.1% (RSD 1.36%),96.4% (RSD 1.37%),98.3% (RSD 1.80%),97.3% (RSD 1.64%)。 结论: 该方法简便,准确,重复性好,可为消癌平注射液提供质量控制依据。  相似文献   

8.
HPLC波长切换法测定止痛片中芍药苷与胡椒碱的含量   总被引:1,自引:1,他引:0  
目的: 建立同时测定止痛片中芍药苷和胡椒碱含量的方法。 方法: 采用 Phenomsil ODS (4.6 mm×250 mm,5 μm)色谱柱,以乙腈-0.1%磷酸为流动相,梯度洗脱,流速1.0 mL·min-1,检测波长230 nm (0~15 min,芍药苷),343 nm(15~30 min,胡椒碱),柱温30℃。 结果: 芍药苷在 4.82~48.24 mg·L-1 (r=0.999 8)呈良好的线性关系,平均回收率为100.59%,RSD 1.43% (n=6),胡椒碱在2.51~25.12 mg·L-1 (r=0.999 7)呈良好的线性关系,平均回收率为99.84%,RSD 1.45% (n=6)。 结论: 方法简单,灵敏度高,可用于止痛片中芍药苷和胡椒碱的含量测定。  相似文献   

9.
不同采收时期牻牛儿苗中4种酚酸类活性成分的动态分析   总被引:2,自引:0,他引:2  
目的: 测定不同采收时期牻牛儿苗中活性成分没食子酸、原儿茶酸、柯里拉京及鞣花酸的含量,为最佳采收期的确定提供依据。 方法: 采用RP-HPLC,AgilentTC-C18色谱柱(4.6 mm×250 mm,5 μm),0.4%磷酸水溶液-甲醇为流动相梯度洗脱,流速0.8 mL·min-1,检测波长259 nm,柱温30 ℃。 结果: 没食子酸,原儿茶酸,柯里拉京,鞣花酸的线性范围分别为0.492~4.920 g·L-1r=0.999 3),0.497~4.970 g·L-1r=0.999 7),0.995~9.950 g·L-1r=0.999 8),0.989~9.890 g·L-1r=0.999 7);平均回收率分别为100.46%(RSD 2.1%),99.78%(RSD 1.3%),100.18%(RSD 1.0%),100.21%(RSD 1.4%)。 结论: 牻牛儿苗中没食子酸及原儿茶酸的含量在五月末达到最大值,柯里拉京及鞣花酸的含量在六月末达到最大值。4种酚酸活性成分总量在六月末达到最高。  相似文献   

10.
建立山茱萸药材中环烯醚萜苷类及三萜酸类化学成分的含量测定方法,为山茱萸药材的质量标准提升提供技术支撑。采用HPLC-UV法,以乙腈-0.1%甲酸水溶液为流动相梯度洗脱,检测波长为240 nm,建立同时测定莫诺苷、马钱苷、当药苷的含量测定方法;采用HPLC-ELSD法,以甲醇-0.5%乙酸铵(87:13)为流动相,建立同时测定齐墩果酸、熊果酸的含量测定方法。结果:显示在上述色谱条件下,莫诺苷、马钱苷、当药苷分别在质量浓度5.335~213.4 mg·L-1(r = 0.999 9),5.515~220.6 mg·L-1(r=1.000 0),1.992~79.68 mg·L-1(r=1.000 0)线性关系良好,平均加样回收率均在98.49%~99.28%,RSD<2%;齐墩果酸、熊果酸分别在质量浓度7.74~154.8 mg·L-1(r=0.996 4),10.82~216.4 mg·L-1(r=0.999 6)线性关系良好,平均加样回收率均在98.11%~99.27%,RSD <3%。表明所建立的方法简单快速,准确可靠,重复性好,可用于客观评价山茱萸药材的品质及其质量控制,为完善山茱萸药材现行质量标准提供了实验数据,对于保证其质量和临床疗效具有重要意义。  相似文献   

11.
汤卫国  王奇志  印敏  王鸣  陈雨  张建华  冯煦 《中草药》2014,45(15):2172-2177
目的建立微波消解-电感耦合等离子体质谱(ICP-MS)直接稀释测定脉络宁注射液中25种矿物质元素(Mg、Ca、Fe、Cu、Zn、Mn、Al、B、Ba、Co、Cr、K、Li、Mo、Na、Ni、P、Pb、Sr、Th、Ti、V、As、Cd和Hg)的方法。方法分别对微波消解条件和测试条件进行考察;样品经微波消解后,采用电感耦合质谱仪测定25种矿物质元素,并对测定方法学进行考察。结果确定最佳消解条件为3步缓慢升温:400 W 80℃升温10 min,保留5 min;600 W 120℃升温10 min,保留5 min;900 W 200℃升温20 min,保留20 min;25种矿物质元素在各自的线性范围内线性关系良好,r≥0.999 6,精密度、稳定性和重复性试验的RSD均符合定量分析要求;加标回收率为94.7%~106.1%,RSD在0.34%~2.79%。脉络宁注射液中检测出Mg、Ca、Fe、Cu、Zn、Mn、Al、B、Ba、Co、Cr、K、Li、Mo、Na、Ni、P、Pb、Sr、Th、Ti、V,未检出As、Cd和Hg。结论该方法简便、迅速、准确,适用于脉络宁注射液中25种矿物质元素的同时测定。  相似文献   

12.
The disturbance and instability of laterality are obstacles to diagnostics and therapy. Correction prior to starting therapy is required. They also predispose toward defined health problems and unspecific diseases. Numerous research activities provide evidence of the relevance of undisturbed laterality in diagnostics and therapy. Techniques of testing and therapeutic corrections will allow for optimized therapy success.  相似文献   

13.
正Beverages based on Ilex paraguariensis A.St.-Hil.are used in the south Brazil and other Latin American countries located at the so-called southern cone.It is known as chimarro or mate in south and southeast Brazil,tererêin  相似文献   

14.
15.
The Journal of Acupuncture and Tuina Science, a journal with an international scope (IS SN 1672-3597, CN 31-1908/R, Bimonthly), is embodied by 'Springer Verlag' Database, Index Copernicus (IC) and Chinese Scientific and Technical Paper and Citations Data (CSTPCD). You can search full text on http://www, springerlink, com/content/1672 -3597.  相似文献   

16.
This paper deals with an interdisciplinary study covering historic, botanical, phytochemical, pharmacological and clinical aspects of rhubarb and related species, to lay stress on the correlation between plant phylogeny, chemical constituents and purgative activity.

It was found that the official rhubarbs were exclusively restricted in the Sect. Palmata e.g. Rheum palmatum R. palmatum var. tanguticum R. officinale; the following criteria may serve as their standard, viz., the presence of sennoside derivatives and rhein, the occurrence of the reduced form of rhein and aloe-emodin, the leaves with any kind of palmate incision. Comprehensive multivariate analyses showed that there is a very close relationship between the leaf incision, existence of sennosides or rhein and purgative activity.  相似文献   


17.
目的 通过电感耦合等离子体质谱(inductively coupled plasma mass spectrometry,ICP-MS)法建立加味左金丸中Cd、Pb、As、Hg、Co、V、Ni、Cu、Li、Sb、Ba、Mo、Sn、Cr、Na、Mg、Al、Ca、Ti、Mn、Fe、Zn、Ga、Se、Sr、Tl共计26种无机元素的测定方法。方法 加味左金丸通过微波消解法处理后,根据相对分子质量的大小选择内标物,其中7Li、23Na、24Mg、27Al、40Ca、48Ti、51V、52Cr、55Mn、56Fe、58Ni、59Co、63Cu、66Zn、70Ga、75As、77Se、86Sr以72Ge作为内标;95Mo、114Cd、118Sn、121Sb、137Ba以115In作为内标;202Hg、205Tl、208Pb以209Bi作为内标。对标准品溶液、空白溶液与供试品溶液进行分析,采用标准曲线法进行定量分析。通过ICP-MS法进行测定。结果 26种无机元素线性的相关系数r ≥ 0.999 6,检出限为0.001~1.500μg/L,定量限为0.01~5.00 μg/L,精密度与重复性试验的RSD均小于5%,平均回收率在82.64%~106.44%,RSD均小于5%。对3个厂家的12批样品进行了测定,26种元素的含量差异较大,其中Na、Mg、Ca、Fe 4种元素的含量比较高,均大于500 μg/g,Cd、Pb、As、Hg、Co、Li、Sb、Mo、Sn、Cr、Se、Tl的含量比较低,均小于1 μg/g。由结果可知,人体的常量元素,如Na、Mg、Ca的含量比较高,Cd、Pb、As、Hg等有害元素含量比较低。根据《中国药典》2020年版一部的要求,本品中Cd、Pb、As、Hg与Cu均符合规定。结论 该方法快速、准确,可以用于加味左金丸中无机元素的测定。  相似文献   

18.

Background

At present, the state-of-the-art medication in treating idiopathic taste disorder (gustatory dysfunction) is zinc. If zinc medication was unsuccessful, not tolerated or if it is contraindicated the persons affected can hardly be helped.

Objectives

In a randomized placebo-controlled clinical trial an attempt was made to determine the efficacy of acupuncture.

Methods

The treatment group was treated with acupuncture needles, the placebo group with an inactive acupuncture-laser. Endpoints of the study were changes in the taste test, the quality of life and the severity of symptoms of depression (BDI) as well as mood changes (ZMS). Satisfaction with the success of the respective therapy was also evaluated. Data were collected before and after therapy and again for the treatment group 10 weeks after completion of the treatment period.

Findings

Treatment with real acupuncture showed a significant improvement in gustatory function as well as a significant improvement in psychological symptoms. Greater satisfaction with the treatment results was evident in the treatment group. The treatment results of acupuncture remained stable over a period of ten weeks after completion of the treatment.

Conclusion

Acupuncture was effective in the therapy of idiopathic taste disorders and therefore it is an effective alternative when zinc medication is not tolerated or unsuccessful. But it is also suitable as a therapy of first choice. Acupuncture can be considered as an extension of the therapeutic spectrum in the difficult treatment of taste disorders.  相似文献   

19.
A girl, three and a half years old at the respective date, premature in 25th week of gestation, had been presented. On day three after birth, she had had a IVH III° right and left with severe involvement of parenchyma and other multiple complications, e. a. infant respiratory distress syndrome up to the 42nd day postpartum, and epileptic attacks with apnoeic events.  相似文献   

20.

Background

Experimental and clinical studies postulate a neurobiological mechanism of acupuncture by modulating central pain systems, neurohormones and -transmitters. It seems to be quite likely that the autonomic nervous system (ANS) plays an important mediating role in this neuromodulation.

Aim

In measuring heart rate variability (HRV), as a non-invasive approach to the ANS-function, the object of this study was to monitor probable acupuncture-induced changes of autonomic balance. The innovative technology of laser-needle acupuncture offers for the first time a stimulation method which fulfils the demands on a placebo-controlled acupuncture trial not requiring controversial sham acupuncture.

Method

19 healthy voluntary subjects underwent 3 treatments in randomized sequence, consisting of placebo-, 1-point- (PC 6) and simultaneous 3-point- (PC 6, LR 3, SI 3) laser-needle-stimulation over 20 minutes. Before, during and after placebo-/verum laser-needle acupuncture, HRV-data for normalized HF(high frequency)- and LF(low frequency)-Power (nHF, nLF) and their quotient nLF/nHF obtained by power spectrum analysis (FFT), were measured and analyzed statistically at 5 different time points (ANOVA repeated measures, p < 0,05).

Results

During both verum applications, the 1-point- (PC 6) as well as the simultaneous 3-point- (PC 6, LR 3, SI 3) laser-needle stimulation, significant changes of the ANS-activity were found in comparison to the placebo application. The most significant modification of HRV was an increase of nHF (p < 0,05 (PC 6), p < 0,0001 (PC 6, LR 3, SI 3)) as an expression of growing vagal activity during acupuncture.

Conclusion

Laser-needle acupuncture causes in 1-point-stimulation (PC 6) as well as in simultaneous 3-point-stimulation (PC 6, LR 3, SI 3) significant changes in HRV in comparison to placebo application. HRV-monitoring seems to be a suitable approach in exploration of acupuncture-induced changes of ANS and could possibly be established in combination with laser needle acupuncture as a standard for further scientific and clinical acupuncture investigations which are greatly needed.  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号