基于化学识别模式,建立HPLC指纹图谱及多成分含量测定,为金花三宝口服液的质量评价提供参考。采用HPLC法,以Capcell Pak C_(18)(250mm×4.6mm,5μm)为色谱柱,流速为0.8mL·min^(-1),流动相是甲醇(A)-0.1%磷酸水(B),柱温为30℃,...基于化学识别模式,建立HPLC指纹图谱及多成分含量测定,为金花三宝口服液的质量评价提供参考。采用HPLC法,以Capcell Pak C_(18)(250mm×4.6mm,5μm)为色谱柱,流速为0.8mL·min^(-1),流动相是甲醇(A)-0.1%磷酸水(B),柱温为30℃,进样量为10μL,检测波长为266nm;建立指纹图谱并同时测定6个成分的含量,采用聚类分析(CA),主成分分析(PCA)以及偏最小二乘-判别分析(PLS-DA)对数据进行分析。指纹图谱共确定了13个共有峰,并指认了6个成分;相似度值为0.958以上;聚类分析,主成分分析将样品划分为2类,偏最小二乘-判别分析筛选出峰12,新绿原酸,芦丁等8个质量差异标志成分。含量测定结果表明:10批金花三宝口服液中新绿原酸、绿原酸、隐绿原酸、异绿原酸A、芦丁、异绿原酸C的平均含量依次为:0.2183,0.8465,0.1644,0.3790,0.0749,0.1701mg·mL^(-1)。本研究所建立的HPLC指纹图谱及多成分的含量测定准确,稳定可行,可为质量控制提供参考依据。展开更多
Circular dichroism, intrinsic fluorescence of protein and exogenous fluorescence probe of 8-anilino-1-naphtha- lenesulfonic acid hemimagnesium salt （ANS） was used to investigate the mechanism of conformational chang...Circular dichroism, intrinsic fluorescence of protein and exogenous fluorescence probe of 8-anilino-1-naphtha- lenesulfonic acid hemimagnesium salt （ANS） was used to investigate the mechanism of conformational change of silk fibroin （SF） in aqueous alcohol including methanol and ethanol. The conformational transition of SF from random coil to β-sheet was found to be of a close relationship with the microstructure of the solvent. The alcohol-water mixture at low concentration had little effect on the solvation of the peptide unit, as the inherent water structure was conserved. At high alcohol concentration, the transition from the tetrahedral-like water structure to the chain-like alcohol structure in the mixtures induced a β-sheet conformation of SF, as a result of the formation of intramolecular hydrogen bond between the peptide units in order to eliminate the thermodynamic unfavorite from the contact to the solvent molecules. Meanwhile, the aggregating of hydrophobic side chains was decreased by the alcohol via the destruction of hydrogen bond network of water by alcohol and the binding of alcohol to hydrophobic group.展开更多
文摘基于化学识别模式,建立HPLC指纹图谱及多成分含量测定,为金花三宝口服液的质量评价提供参考。采用HPLC法,以Capcell Pak C_(18)(250mm×4.6mm,5μm)为色谱柱,流速为0.8mL·min^(-1),流动相是甲醇(A)-0.1%磷酸水(B),柱温为30℃,进样量为10μL,检测波长为266nm;建立指纹图谱并同时测定6个成分的含量,采用聚类分析(CA),主成分分析(PCA)以及偏最小二乘-判别分析(PLS-DA)对数据进行分析。指纹图谱共确定了13个共有峰,并指认了6个成分;相似度值为0.958以上;聚类分析,主成分分析将样品划分为2类,偏最小二乘-判别分析筛选出峰12,新绿原酸,芦丁等8个质量差异标志成分。含量测定结果表明:10批金花三宝口服液中新绿原酸、绿原酸、隐绿原酸、异绿原酸A、芦丁、异绿原酸C的平均含量依次为:0.2183,0.8465,0.1644,0.3790,0.0749,0.1701mg·mL^(-1)。本研究所建立的HPLC指纹图谱及多成分的含量测定准确,稳定可行,可为质量控制提供参考依据。
基金Project supported by the National Natural Science Foundation of China （No. 21063002）.
文摘Circular dichroism, intrinsic fluorescence of protein and exogenous fluorescence probe of 8-anilino-1-naphtha- lenesulfonic acid hemimagnesium salt （ANS） was used to investigate the mechanism of conformational change of silk fibroin （SF） in aqueous alcohol including methanol and ethanol. The conformational transition of SF from random coil to β-sheet was found to be of a close relationship with the microstructure of the solvent. The alcohol-water mixture at low concentration had little effect on the solvation of the peptide unit, as the inherent water structure was conserved. At high alcohol concentration, the transition from the tetrahedral-like water structure to the chain-like alcohol structure in the mixtures induced a β-sheet conformation of SF, as a result of the formation of intramolecular hydrogen bond between the peptide units in order to eliminate the thermodynamic unfavorite from the contact to the solvent molecules. Meanwhile, the aggregating of hydrophobic side chains was decreased by the alcohol via the destruction of hydrogen bond network of water by alcohol and the binding of alcohol to hydrophobic group.
