Objective Establishing a fingerprint method to identify the characteristic chemicals in the roots of Gentiana macrophylla and evaluate their quality. Methods RP-HPLC was developed for fingerprint analysis and determin...Objective Establishing a fingerprint method to identify the characteristic chemicals in the roots of Gentiana macrophylla and evaluate their quality. Methods RP-HPLC was developed for fingerprint analysis and determination of four ingredients in G. macrophylla roots from different sources. LC-ESI-TOF-MS was employed to identify the chromatographic peaks of the fingerprint. Results Five common peaks were identified by comparing their retention time with reference secoiridoid glucosides. Eight major peaks in chromatographic fingerprint were analyzed by on-line LC-ESI-TOF-MS. Four secoiridoid glucosides were identified based on their MS data. Conclusion The method is specific and could be served for the quality identification and comprehensive evaluation of G. macrophylla.展开更多
质谱法(Mass spectrometry,MS)是当前农药残留分析中的主导检测技术。对气相色谱-质谱法(GC-MS)、气相色谱-串联质谱法(GC-MS/MS)、液相色谱-串联质谱法(LC-MS/MS)和飞行时间质谱法(time-of-flight mass spectrometry,TOF-MS)在食品样...质谱法(Mass spectrometry,MS)是当前农药残留分析中的主导检测技术。对气相色谱-质谱法(GC-MS)、气相色谱-串联质谱法(GC-MS/MS)、液相色谱-串联质谱法(LC-MS/MS)和飞行时间质谱法(time-of-flight mass spectrometry,TOF-MS)在食品样本农药残留分析中的应用进行了综述,重点对质谱技术在国内外多残留分析方法研究中的应用进展进行了总结和归纳,简要比较了质谱分析时常用的几种样品前处理技术的优缺点及其适用性,展望了质谱法在农药残留分析研究领域的发展前景。展开更多
The major metabolites of ginsenoside-Rb1 in rats urine were described.Urine samples were collected before and after 24 h of single oral administration of 150 mg and intravenous administration of 60 mg Rb1 to four rats...The major metabolites of ginsenoside-Rb1 in rats urine were described.Urine samples were collected before and after 24 h of single oral administration of 150 mg and intravenous administration of 60 mg Rb1 to four rats,respectively.The samples were purified by SPE column and then were analyzed by liquid chromatography-ESI-mass spectrometry for potential metabolites.Parent drug and its fourteen metabolites were identified in rat urine based on the comparison of total ion chromatograms of the blank with the metabolic urine as well as mass spectra.Its main metabolic pathways and possible structures are analyzed in detail.展开更多
基金National Science and Technology Ministry "Significant new drugs creation" special science and Technology Major (20082X09101-016)
文摘Objective Establishing a fingerprint method to identify the characteristic chemicals in the roots of Gentiana macrophylla and evaluate their quality. Methods RP-HPLC was developed for fingerprint analysis and determination of four ingredients in G. macrophylla roots from different sources. LC-ESI-TOF-MS was employed to identify the chromatographic peaks of the fingerprint. Results Five common peaks were identified by comparing their retention time with reference secoiridoid glucosides. Eight major peaks in chromatographic fingerprint were analyzed by on-line LC-ESI-TOF-MS. Four secoiridoid glucosides were identified based on their MS data. Conclusion The method is specific and could be served for the quality identification and comprehensive evaluation of G. macrophylla.
文摘质谱法(Mass spectrometry,MS)是当前农药残留分析中的主导检测技术。对气相色谱-质谱法(GC-MS)、气相色谱-串联质谱法(GC-MS/MS)、液相色谱-串联质谱法(LC-MS/MS)和飞行时间质谱法(time-of-flight mass spectrometry,TOF-MS)在食品样本农药残留分析中的应用进行了综述,重点对质谱技术在国内外多残留分析方法研究中的应用进展进行了总结和归纳,简要比较了质谱分析时常用的几种样品前处理技术的优缺点及其适用性,展望了质谱法在农药残留分析研究领域的发展前景。
文摘The major metabolites of ginsenoside-Rb1 in rats urine were described.Urine samples were collected before and after 24 h of single oral administration of 150 mg and intravenous administration of 60 mg Rb1 to four rats,respectively.The samples were purified by SPE column and then were analyzed by liquid chromatography-ESI-mass spectrometry for potential metabolites.Parent drug and its fourteen metabolites were identified in rat urine based on the comparison of total ion chromatograms of the blank with the metabolic urine as well as mass spectra.Its main metabolic pathways and possible structures are analyzed in detail.
