共查询到17条相似文献,搜索用时 156 毫秒
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目的初步建立水芹总酚酸胶囊的质量控制标准。方法采用薄层色谱法对水芹总酚酸进行定性鉴别;采用Folin酚法测定水芹总酚酸含量;采用高效液相色谱法测定总酚酸中绿原酸含量,色谱条件:DiamonsilC18柱,流动相:A:乙腈-甲醇(10∶1);B:0.4%磷酸,梯度洗脱;检测波长:325nm;流速:1ml/min;柱温:25℃。结果按现有生产工艺,水芹总酚酸胶囊总酚酸含量最高为32.42%,绿原酸最高为9.3%。结论 Folin酚法和高效液相色谱法能精确测定水芹总酚酸胶囊中总酚酸和绿原酸含量,可作为水芹总酚酸胶囊的质量控制方法 。 相似文献
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目的 建立百合知母胶囊的质量标准。方法 采用薄层色谱法(thin layer chromatography,TLC)对百合、知母进行定性鉴别;采用高效液相色谱法(high performance liquid chromatography,HPLC)测定制剂中芒果苷含量。结果 应用薄层色谱法鉴别知母具有专属性,而该法鉴别百合不具有专属性;芒果苷在 0.0674~1.3480 μg范围内呈良好的线性关系,相关系数r=0.9998;检测下限为0.0674 μg,芒果苷的平均回收率为(98.890±0.497)%,RSD=0.50%。结论 本方法操作简便,结果准确,重复性好,可用于该制剂的质量控制。 相似文献
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目的建立高欣胶囊的质量标准。方法采用薄层色谱法对淫羊藿、蒺藜药材进行定性鉴别;采用高效液相色谱法测定高欣胶囊中淫羊藿苷的含量。Agilent 1100高效液相色谱仪,Kromasil C18色谱柱(250 mm×4.6 mm,5μm);流动相:乙腈-1%醋酸水溶液(21∶79);流速:1 ml/min;检测波长:270 nm;柱温:室温。结果薄层色谱鉴别方法专属性强;淫羊藿苷在0.209~1.045μg范围内呈良好线性关系,线性方程:Y=3624.3X+2.2888,r=0.9999,平均加样回收率为100.07%,RSD为1.44%。结论本质量标准方法简单、操作简便、结果准确、重复性好,可有效控制高欣胶囊的质量。 相似文献
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目的建立消糖宁胶囊的质量标准。方法采用TLC法对西洋参、黄连、枸杞子、红花进行了定性分析;应用 HPLC法对盐酸二甲双胍进行了含量测定,流动相为乙睛4.05%庚烷磺酸钠溶液(以10%磷酸调PH 4.0) (25:75);流速 1 ml ?min^-1 ;检测波长233 nm。结果TLC法可准确地对西洋参、黄连、枸杞子、红花进行定性鉴别;盐酸二甲双胍在0.2156-0.8624 (jig范围内线性关系良好(r =0.9999),平均回收率为99.7%。结论该方法简便、快速、准确、重复性好,可作为消糖 宁胶囊的质量控制标准。 相似文献
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目的建立和中理脾丸的质量控制方法。方法分别采用显微鉴别法,薄层色谱法对7味中药材进行了定性鉴别;采用高效液相色谱法测定了厚朴酚与和厚朴酚的含量,色谱柱为AgilentExtend-C18(250mm×4.6mm,5μm)分析柱;流动相:乙腈-0.05%磷酸水(39:61);检测波长:222nm;流速:1.0ml/min;柱温:40℃。结果定性鉴别方法专属性强;厚朴酚与和厚朴酚分别在0.0770-0.770、0.0352-0.352μg范围内浓度与峰面积呈良好的线性关系(r=0.9998,n=6),平均回收率分别为97.8%、97.6%,RSD分别为1.2%,0.8%(n=6),结论本方法可准确地进行定胜、定量、可用于控制和中理脾丸的质量。 相似文献
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Sanelli PC Nicola G Johnson R Tsiouris AJ Ougorets I Knight C Frommer B Veronelli S Zimmerman RD 《AJNR. American journal of neuroradiology》2007,28(3):428-432
BACKGROUND AND PURPOSE: To evaluate interobserver reliability of obtaining CT perfusion (CTP) data for qualitative identification of perfusion abnormality and quantitative assessment through regions-of-interest (ROIs) placement. MATERIALS AND METHODS: Six observers participated in the study (neuroradiology attending physician, neurology attending physician, neuroradiology fellow, radiology resident physician, senior and junior CT technologists). After a brief training session, each observer evaluated 20 CTP datasets for qualitative identification of a right- or left-sided perfusion abnormality or symmetric perfusion. Observers also placed a single ROI of standard size to obtain quantitative data on the most severely hypoperfused region. An additional 10 ROIs were placed on the cortex to quantitatively evaluate global cortical perfusion. Mean quantitative cerebral blood flow (CBF), cerebral blood volume (CBV), and mean transit time (MTT) values were analyzed. RESULTS: The kappa values for qualitative assessment of a perfusion abnormality ranged from 0.55 to 1.0. Coefficients of variation for quantitative assessment of ischemia/infarct region were 27.10% for CBF, 13.33% for CBV, and 4.66% for MTT. Coefficients of variation for quantitative assessment of global cortical perfusion were 11.88% for CBF, 13.66% for CBV, and 3.55% for MTT. The junior CT technologist and neuroradiology fellow showed significant differences compared with other observers for the ischemia/infarct region and global cortical perfusion, respectively. CONCLUSION: Overall, quantitative differences seen in this study would not necessarily affect quality of interpretation of ischemia/infarct region or global cortical perfusion. Therefore, obtaining qualitative and quantitative CTP data can reliably be performed in the clinical setting among observers with various levels of skill and experience when using a uniform and standard technique. 相似文献