目的建立解毒通淋丸中重楼皂苷Ⅶ、重楼皂苷Ⅵ、重楼皂苷Ⅰ、4′-去甲基鬼臼毒素、鬼臼毒素、泽泻醇F、泽泻醇A、24-乙酰泽泻醇A、23-乙酰泽泻醇B和11-去氧泽泻醇B高效液相色谱-一标多测(high performance liquid chromatography-quanti...目的建立解毒通淋丸中重楼皂苷Ⅶ、重楼皂苷Ⅵ、重楼皂苷Ⅰ、4′-去甲基鬼臼毒素、鬼臼毒素、泽泻醇F、泽泻醇A、24-乙酰泽泻醇A、23-乙酰泽泻醇B和11-去氧泽泻醇B高效液相色谱-一标多测(high performance liquid chromatography-quantitative analysis of multicomponents by single marker,HPLC-QAMS)含量测定方法。方法采用高效液相色谱法,以鬼臼毒素为内参物,运用外标法与一标多测法检测解毒通淋丸中10种成分的含量,并对比两种方法检测结果的差异性,验证一标多测法在解毒通淋丸质量控制研究中的可行性。结果重楼皂苷Ⅶ、重楼皂苷Ⅵ、重楼皂苷Ⅰ、4′-去甲基鬼臼毒素、鬼臼毒素、泽泻醇F、泽泻醇A、24-乙酰泽泻醇A、23-乙酰泽泻醇B和11-去氧泽泻醇B在各自范围内线性关系良好(r>0.999);平均加样回收率96.9%~100.1%(RSD小于2.0%);两种方法所测结果无差异(P>0.05)。结论采用HPLC-QAMS法对解毒通淋丸中10种成分进行定量评价分析的方法是可行的。展开更多
This research uses eigenvalue characteristics of nonlinear principal component analysis (NLPCA) and principal component analysis (PCA) to investigate total electron content (TEC) anomalies associated with Taiwan...This research uses eigenvalue characteristics of nonlinear principal component analysis (NLPCA) and principal component analysis (PCA) to investigate total electron content (TEC) anomalies associated with Taiwan's Chi-Chi earthquake of 21 September 1999 (LT) (M_w=7.6). The transforms are used for ionospheric TEC from 01 August to 20 September 1999 (local time) using data from 13 GPS receivers. The data were collected at 22°N-26°N Lat. and 120°E-122°E Long.. Applying the NLPCA to the multi-channel total electron content records of GPS receivers, the earthquake-associated TEC anomalies were represented by large principal eigenvalues of NLPCA (〉0.5 in a normalized set) on 14 August and 17, 18, and 20 September, with allowance given for the Dst index, which was quiet for the study period. Comparisons were then made with other researchers who also found TEC anomalies on September 17, 18, and 19 associated with the Chi-Chi earthquake, which cannot be detected by PCA.Consideration is also given for reported ground level geomagnetic field activity that occurred between mid-August and late October, leading up to and including the Chi-Chi and Chia-Yi earthquakes, which are associated with the same series of faults. It is possible that Aug. 14 is representative of an earthquake-associated TEC anomaly. This is an interesting result given how much earlier than the earthquake it occurred.展开更多
目的 建立一测多评法(quantitative analysis of multi-components by a single marker, QAMS)与HPLC指纹图谱及化学计量分析相结合的方法对滇重楼及其近缘种的质量进行评价。方法 建立滇重楼及其近缘种的指纹图谱并进行相似度分析、聚...目的 建立一测多评法(quantitative analysis of multi-components by a single marker, QAMS)与HPLC指纹图谱及化学计量分析相结合的方法对滇重楼及其近缘种的质量进行评价。方法 建立滇重楼及其近缘种的指纹图谱并进行相似度分析、聚类分析(cluster analysis, CA)以及主成分分析(principal component analysis, PCA)。以重楼皂苷VII为内标,建立重楼皂苷II、重楼皂苷III、重楼皂苷VI、重楼皂苷I、重楼皂苷H、重楼皂苷D、伪原薯蓣皂苷的相对校正因子,并考察QAMS的可行性。色谱条件:采用Agilent ZORBAX SB C18色谱柱(4.6 mm×250.0 mm, 5μm);乙腈(A)和水(B)为流动相进行梯度洗脱;流速0.8 mL/min;柱温30℃;检测波长203 nm;进样量5μL。结果 建立了不同种重楼样品的指纹图谱,相似度分析显示不同种重楼样品的相似度介于0.646~0.913,表明不同种重楼间的化学成分及含量差异性较大;以重楼皂苷VII为内标,所建立的滇重楼QAMS含量测定方法,与外标法(external standard method, ESM)得到的结果进行比较无显著差异,确定了QAMS在含量测定中的可行性,将QAMS应用于滇重楼近缘种的含量测定,只有长柱重楼的全部样品(CZCL01~04)和TCCL03符合《中华人民共和国药典》的质控标准;进一步以重楼样品中的8个皂苷类成分的峰面积作为变量进行聚类分析和主成分分析,聚类分析结果显示滇重楼及其近缘种样品可以聚为4类,长柱重楼、大理重楼和腾冲重楼均可自成一类,其余种重楼无法进行区分。主成分分析中46批重楼样品大体可以分为5类,大理重楼、长柱重楼、腾冲重楼各为一类,大部分滇重楼为一类,毛重楼、矮重楼、独龙重楼样品在主成分分析中无分类趋势。结论 QAMS与指纹图谱及化学计量分析相结合的方法可以完成对滇重楼及其近缘种中8种皂苷类成分的同时快速定量。并对其质量进行评价。实验建立的分析方法准确可行,可以在保护中药资源、节省时间的前提下对滇重楼及其近缘种样品的质量进行综合评价。展开更多
目的:建立苗药紫藤根药材超高效液相色谱法(UPLC)指纹图谱及4个黄酮类成分含量测定方法,为全面评价其质量提供依据。方法:采用UPLC建立紫藤根药材指纹图谱,对不同产地药材进行相似度评价、聚类分析和主成分分析;同时对4个黄酮类成分含...目的:建立苗药紫藤根药材超高效液相色谱法(UPLC)指纹图谱及4个黄酮类成分含量测定方法,为全面评价其质量提供依据。方法:采用UPLC建立紫藤根药材指纹图谱,对不同产地药材进行相似度评价、聚类分析和主成分分析;同时对4个黄酮类成分含量进行测定。结果:建立了紫藤根UPLC指纹图谱,确定19个共有峰,指认了其中4个成分,分别为鸢尾苷、芒柄花苷、紫藤苷、biochanin A 7-O-glucoside。12批紫藤根药材相似度介于0.839至0.975之间;聚类分析可将不同产地的药材分为3类,表明不同产地药材存在一定差异;含量测定结果显示,安徽亳州产地药材鸢尾苷含量最高、湖南湘阴产地药材芒柄花苷含量最高,两地4个指标性成分总含量较高且稳定。结论:该方法可以有效评价不同产区紫藤根药材的质量差异性,为其质量控制和药材选购提供参考。展开更多
文摘目的建立解毒通淋丸中重楼皂苷Ⅶ、重楼皂苷Ⅵ、重楼皂苷Ⅰ、4′-去甲基鬼臼毒素、鬼臼毒素、泽泻醇F、泽泻醇A、24-乙酰泽泻醇A、23-乙酰泽泻醇B和11-去氧泽泻醇B高效液相色谱-一标多测(high performance liquid chromatography-quantitative analysis of multicomponents by single marker,HPLC-QAMS)含量测定方法。方法采用高效液相色谱法,以鬼臼毒素为内参物,运用外标法与一标多测法检测解毒通淋丸中10种成分的含量,并对比两种方法检测结果的差异性,验证一标多测法在解毒通淋丸质量控制研究中的可行性。结果重楼皂苷Ⅶ、重楼皂苷Ⅵ、重楼皂苷Ⅰ、4′-去甲基鬼臼毒素、鬼臼毒素、泽泻醇F、泽泻醇A、24-乙酰泽泻醇A、23-乙酰泽泻醇B和11-去氧泽泻醇B在各自范围内线性关系良好(r>0.999);平均加样回收率96.9%~100.1%(RSD小于2.0%);两种方法所测结果无差异(P>0.05)。结论采用HPLC-QAMS法对解毒通淋丸中10种成分进行定量评价分析的方法是可行的。
文摘This research uses eigenvalue characteristics of nonlinear principal component analysis (NLPCA) and principal component analysis (PCA) to investigate total electron content (TEC) anomalies associated with Taiwan's Chi-Chi earthquake of 21 September 1999 (LT) (M_w=7.6). The transforms are used for ionospheric TEC from 01 August to 20 September 1999 (local time) using data from 13 GPS receivers. The data were collected at 22°N-26°N Lat. and 120°E-122°E Long.. Applying the NLPCA to the multi-channel total electron content records of GPS receivers, the earthquake-associated TEC anomalies were represented by large principal eigenvalues of NLPCA (〉0.5 in a normalized set) on 14 August and 17, 18, and 20 September, with allowance given for the Dst index, which was quiet for the study period. Comparisons were then made with other researchers who also found TEC anomalies on September 17, 18, and 19 associated with the Chi-Chi earthquake, which cannot be detected by PCA.Consideration is also given for reported ground level geomagnetic field activity that occurred between mid-August and late October, leading up to and including the Chi-Chi and Chia-Yi earthquakes, which are associated with the same series of faults. It is possible that Aug. 14 is representative of an earthquake-associated TEC anomaly. This is an interesting result given how much earlier than the earthquake it occurred.
文摘目的 建立一测多评法(quantitative analysis of multi-components by a single marker, QAMS)与HPLC指纹图谱及化学计量分析相结合的方法对滇重楼及其近缘种的质量进行评价。方法 建立滇重楼及其近缘种的指纹图谱并进行相似度分析、聚类分析(cluster analysis, CA)以及主成分分析(principal component analysis, PCA)。以重楼皂苷VII为内标,建立重楼皂苷II、重楼皂苷III、重楼皂苷VI、重楼皂苷I、重楼皂苷H、重楼皂苷D、伪原薯蓣皂苷的相对校正因子,并考察QAMS的可行性。色谱条件:采用Agilent ZORBAX SB C18色谱柱(4.6 mm×250.0 mm, 5μm);乙腈(A)和水(B)为流动相进行梯度洗脱;流速0.8 mL/min;柱温30℃;检测波长203 nm;进样量5μL。结果 建立了不同种重楼样品的指纹图谱,相似度分析显示不同种重楼样品的相似度介于0.646~0.913,表明不同种重楼间的化学成分及含量差异性较大;以重楼皂苷VII为内标,所建立的滇重楼QAMS含量测定方法,与外标法(external standard method, ESM)得到的结果进行比较无显著差异,确定了QAMS在含量测定中的可行性,将QAMS应用于滇重楼近缘种的含量测定,只有长柱重楼的全部样品(CZCL01~04)和TCCL03符合《中华人民共和国药典》的质控标准;进一步以重楼样品中的8个皂苷类成分的峰面积作为变量进行聚类分析和主成分分析,聚类分析结果显示滇重楼及其近缘种样品可以聚为4类,长柱重楼、大理重楼和腾冲重楼均可自成一类,其余种重楼无法进行区分。主成分分析中46批重楼样品大体可以分为5类,大理重楼、长柱重楼、腾冲重楼各为一类,大部分滇重楼为一类,毛重楼、矮重楼、独龙重楼样品在主成分分析中无分类趋势。结论 QAMS与指纹图谱及化学计量分析相结合的方法可以完成对滇重楼及其近缘种中8种皂苷类成分的同时快速定量。并对其质量进行评价。实验建立的分析方法准确可行,可以在保护中药资源、节省时间的前提下对滇重楼及其近缘种样品的质量进行综合评价。
文摘目的:建立苗药紫藤根药材超高效液相色谱法(UPLC)指纹图谱及4个黄酮类成分含量测定方法,为全面评价其质量提供依据。方法:采用UPLC建立紫藤根药材指纹图谱,对不同产地药材进行相似度评价、聚类分析和主成分分析;同时对4个黄酮类成分含量进行测定。结果:建立了紫藤根UPLC指纹图谱,确定19个共有峰,指认了其中4个成分,分别为鸢尾苷、芒柄花苷、紫藤苷、biochanin A 7-O-glucoside。12批紫藤根药材相似度介于0.839至0.975之间;聚类分析可将不同产地的药材分为3类,表明不同产地药材存在一定差异;含量测定结果显示,安徽亳州产地药材鸢尾苷含量最高、湖南湘阴产地药材芒柄花苷含量最高,两地4个指标性成分总含量较高且稳定。结论:该方法可以有效评价不同产区紫藤根药材的质量差异性,为其质量控制和药材选购提供参考。