本实验采用UPLC/Q-TOF-MS方法结合多变量统计分析(PCA、OPLS-DA),分析不同批次黄芪饮片碱洗前后黄芪皂苷类成分变化趋势及原因。并对黄芪皂苷Ⅰ、Ⅱ、Ⅳ进行含量测定。为以黄芪皂苷类成分作为指标成分进行黄芪饮片及含黄芪中成药质量研...本实验采用UPLC/Q-TOF-MS方法结合多变量统计分析(PCA、OPLS-DA),分析不同批次黄芪饮片碱洗前后黄芪皂苷类成分变化趋势及原因。并对黄芪皂苷Ⅰ、Ⅱ、Ⅳ进行含量测定。为以黄芪皂苷类成分作为指标成分进行黄芪饮片及含黄芪中成药质量研究提供了实验依据。本实验采用ACQUITY UPLC C18色谱柱以乙腈-甲酸(1 m L/L)水溶液作为流动相进行梯度洗脱,流速0.45 m L/min,柱温40℃。使用ESI电离源在正、负离子模式下采集数据,应用Masslynx 4.1质谱工作站软件进行分多变量统计分析(PCA、OPLS-DA)。明确了黄芪饮片供试品制备过程氨水洗涤步骤能够使黄芪皂苷Ⅰ、Ⅱ水解脱乙酰基转化为黄芪皂苷Ⅳ。同时应用UPLC/Q-TOF-MS方法测定了黄芪饮片中黄芪皂苷Ⅰ、Ⅱ、Ⅳ含量,该方法简单、快速、重现性较好,可用于黄芪饮片中该三个成分的含量测定。本实验为以黄芪皂苷类成分作为指标成分进行黄芪饮片及含黄芪中成药质量研究提供了实验依据。展开更多
目的利用超快速液相-四级杆-飞行时间串联质谱技术UFLC/Q-TOF-MS分析北苍术麸炒前后化学成分及量的整体变化,方法采用UPLC T3 C18色谱柱(2.1 mm×100 mm,1.8μm),0.1%甲酸水-0.1%甲酸乙腈为流动相进行梯度洗脱,ESI源,正模式下采集...目的利用超快速液相-四级杆-飞行时间串联质谱技术UFLC/Q-TOF-MS分析北苍术麸炒前后化学成分及量的整体变化,方法采用UPLC T3 C18色谱柱(2.1 mm×100 mm,1.8μm),0.1%甲酸水-0.1%甲酸乙腈为流动相进行梯度洗脱,ESI源,正模式下采集质谱数据,应用Markerview等软件进行主成分分析(PCA),比较北苍术炮制前后成分变化。结果正离子模式时PCA分析能很好区分麦麸对分析的影响并发现麸炒后苍术苷A、白术内酯Ⅰ、白术内酯Ⅱ、以及一未知成分量显著升高,与此同时α-姜黄烯、苍术醇、白术内酯Ⅲ、苍术素量显著下降。结论麸炒使白术内酯Ⅲ脱水、脱氢转化而使白术内酯Ⅰ、白术内酯Ⅱ量增加,可能是麸炒北苍术药材健脾作用的物质基础。展开更多
Poliumoside is the main active constituent of Callicarpa kwangtungensis Chun (CK), a traditional Chinese medicine for management of hemostasis. In this study, a rapid and selective ultra-performance liquid chromatogra...Poliumoside is the main active constituent of Callicarpa kwangtungensis Chun (CK), a traditional Chinese medicine for management of hemostasis. In this study, a rapid and selective ultra-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry (UPLC/ Q-TOF-MS) method was developed and validated to quantify poliumoside in rat plasma. The targeted analytes in rat plasma were prepared through protein-precipitation method using 10% trichloroacetic acid (TCA). The chromatographic separation was performed on a Waters BEH C<sub>18</sub> column (2.1 × 100 mm, 1.7 μm) by acetonitrile-water containing 0.1% formic acid. The calibration curve was linear over the range of 50 - 10,000 ng/mL (r<sup>2</sup> > 0.99). The intra-day or inter-day precision was less than 7.97% and accuracy was within ?7.00% - 3.36%. The developed method was successfully applied to pharmacokinetic study of poliumoside in rat plasma. Although being rapidly absorbed (T<sub>max</sub> ≤ 30 min), poliumoside was poorly bioavailable after oral administration (the absolute bioavailability was only 0.69%).展开更多
文摘本实验采用UPLC/Q-TOF-MS方法结合多变量统计分析(PCA、OPLS-DA),分析不同批次黄芪饮片碱洗前后黄芪皂苷类成分变化趋势及原因。并对黄芪皂苷Ⅰ、Ⅱ、Ⅳ进行含量测定。为以黄芪皂苷类成分作为指标成分进行黄芪饮片及含黄芪中成药质量研究提供了实验依据。本实验采用ACQUITY UPLC C18色谱柱以乙腈-甲酸(1 m L/L)水溶液作为流动相进行梯度洗脱,流速0.45 m L/min,柱温40℃。使用ESI电离源在正、负离子模式下采集数据,应用Masslynx 4.1质谱工作站软件进行分多变量统计分析(PCA、OPLS-DA)。明确了黄芪饮片供试品制备过程氨水洗涤步骤能够使黄芪皂苷Ⅰ、Ⅱ水解脱乙酰基转化为黄芪皂苷Ⅳ。同时应用UPLC/Q-TOF-MS方法测定了黄芪饮片中黄芪皂苷Ⅰ、Ⅱ、Ⅳ含量,该方法简单、快速、重现性较好,可用于黄芪饮片中该三个成分的含量测定。本实验为以黄芪皂苷类成分作为指标成分进行黄芪饮片及含黄芪中成药质量研究提供了实验依据。
文摘目的利用超快速液相-四级杆-飞行时间串联质谱技术UFLC/Q-TOF-MS分析北苍术麸炒前后化学成分及量的整体变化,方法采用UPLC T3 C18色谱柱(2.1 mm×100 mm,1.8μm),0.1%甲酸水-0.1%甲酸乙腈为流动相进行梯度洗脱,ESI源,正模式下采集质谱数据,应用Markerview等软件进行主成分分析(PCA),比较北苍术炮制前后成分变化。结果正离子模式时PCA分析能很好区分麦麸对分析的影响并发现麸炒后苍术苷A、白术内酯Ⅰ、白术内酯Ⅱ、以及一未知成分量显著升高,与此同时α-姜黄烯、苍术醇、白术内酯Ⅲ、苍术素量显著下降。结论麸炒使白术内酯Ⅲ脱水、脱氢转化而使白术内酯Ⅰ、白术内酯Ⅱ量增加,可能是麸炒北苍术药材健脾作用的物质基础。
文摘Poliumoside is the main active constituent of Callicarpa kwangtungensis Chun (CK), a traditional Chinese medicine for management of hemostasis. In this study, a rapid and selective ultra-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry (UPLC/ Q-TOF-MS) method was developed and validated to quantify poliumoside in rat plasma. The targeted analytes in rat plasma were prepared through protein-precipitation method using 10% trichloroacetic acid (TCA). The chromatographic separation was performed on a Waters BEH C<sub>18</sub> column (2.1 × 100 mm, 1.7 μm) by acetonitrile-water containing 0.1% formic acid. The calibration curve was linear over the range of 50 - 10,000 ng/mL (r<sup>2</sup> > 0.99). The intra-day or inter-day precision was less than 7.97% and accuracy was within ?7.00% - 3.36%. The developed method was successfully applied to pharmacokinetic study of poliumoside in rat plasma. Although being rapidly absorbed (T<sub>max</sub> ≤ 30 min), poliumoside was poorly bioavailable after oral administration (the absolute bioavailability was only 0.69%).
