To establish a rapid and effective method for analysis and identification of the alkaloids from Ranunculus japoni- cus Thunb by ultra-performance liquid chromatogaraphy with quadruple-time-of-flight mass spectrometry ...To establish a rapid and effective method for analysis and identification of the alkaloids from Ranunculus japoni- cus Thunb by ultra-performance liquid chromatogaraphy with quadruple-time-of-flight mass spectrometry （UPLC/Q-TOF- MS） and discuss their fragmentation regularity, the UPLC/Q-TOF-MS was used to identify the alkaloids from Ranunculus japonicus Thunb by their MS data, tandem characteristic fragment ions and standards. In the end, 12 alkaloids were identi- fied from Ranunculus japonicus for the first time, and their fragmentation regularity was discussed. Thus, a rapid and effec- tive analysis and identification method for the alkaloids from Ranunculus japonicus by UPLC/Q-TOF-MS is established.展开更多
A rapid, reliable, and sensitive method was developed using ultra-performance liquid chromatography- tandem mass spectrometry （UPLC-MS/MS） with an electrospray ionization （ESI） source for determination of seven bi...A rapid, reliable, and sensitive method was developed using ultra-performance liquid chromatography- tandem mass spectrometry （UPLC-MS/MS） with an electrospray ionization （ESI） source for determination of seven bioactive compounds in rat plasma after oral administration of Ginkgo biloba tablets （GBTs）. The method simultane- ously detects bilobalide （BB）, ginkgolide A （GA）, ginkgolide B （GB）, ginkgolide C （GC）, quercetin （QCT）, kaempferol （KMF）, and isorhamnetin （ISR） for pharmacokinetic study. The analytes and internal standard （IS） were extracted from rat plasma by acetidin. An MS/MS detection was conducted using multiple reaction monitoring （MRM） and operating in the negative ionization mode. The calibration curve ranges were 5-500, 5-500, 2.5-250, 1-100, 1-100, 1-100, and 1-100 ng/ml for BB, GA, GB, GC, QCT, KMF, and ISR, respectively. The mean recovery of the analytes ranged from 68.11% to 84.42%. The intra- and inter-day precisions were in the range of 2.33%-9.86% and the accuracies were between 87.67% and 108.37%. The method was used successfully in a pharmacokinetic study of GBTs. The phar- macokinetic parameters of seven compounds were analyzed using a non-compartment model. Plasma concentrations of the seven compounds were determined up to 48 h after administration, and their pharmacokinetic parameters were in agreement with previous studies.展开更多
文摘To establish a rapid and effective method for analysis and identification of the alkaloids from Ranunculus japoni- cus Thunb by ultra-performance liquid chromatogaraphy with quadruple-time-of-flight mass spectrometry （UPLC/Q-TOF- MS） and discuss their fragmentation regularity, the UPLC/Q-TOF-MS was used to identify the alkaloids from Ranunculus japonicus Thunb by their MS data, tandem characteristic fragment ions and standards. In the end, 12 alkaloids were identi- fied from Ranunculus japonicus for the first time, and their fragmentation regularity was discussed. Thus, a rapid and effec- tive analysis and identification method for the alkaloids from Ranunculus japonicus by UPLC/Q-TOF-MS is established.
基金supported by the National Basic Research Program(973) of China(No.2012CB724001)the National Natural Science Foundation of China(No.81473365)+2 种基金the Beijing Natural Science Foundation of China(No.7132172)the Independent Project of Beijing University of Chinese Medicine(No.2014-JYBZZ-XS-106)the Innovative Research Team of Beijing University of Chinese Medicine(No.2011-CXTD-13),China
文摘A rapid, reliable, and sensitive method was developed using ultra-performance liquid chromatography- tandem mass spectrometry （UPLC-MS/MS） with an electrospray ionization （ESI） source for determination of seven bioactive compounds in rat plasma after oral administration of Ginkgo biloba tablets （GBTs）. The method simultane- ously detects bilobalide （BB）, ginkgolide A （GA）, ginkgolide B （GB）, ginkgolide C （GC）, quercetin （QCT）, kaempferol （KMF）, and isorhamnetin （ISR） for pharmacokinetic study. The analytes and internal standard （IS） were extracted from rat plasma by acetidin. An MS/MS detection was conducted using multiple reaction monitoring （MRM） and operating in the negative ionization mode. The calibration curve ranges were 5-500, 5-500, 2.5-250, 1-100, 1-100, 1-100, and 1-100 ng/ml for BB, GA, GB, GC, QCT, KMF, and ISR, respectively. The mean recovery of the analytes ranged from 68.11% to 84.42%. The intra- and inter-day precisions were in the range of 2.33%-9.86% and the accuracies were between 87.67% and 108.37%. The method was used successfully in a pharmacokinetic study of GBTs. The phar- macokinetic parameters of seven compounds were analyzed using a non-compartment model. Plasma concentrations of the seven compounds were determined up to 48 h after administration, and their pharmacokinetic parameters were in agreement with previous studies.
