Multi-component fingerprinting and quantitation of the glucosinolates and nucleosides in samples of Radix Isatidis have been carried out using high-performance liquid chromatography with diode-array detection and elec...Multi-component fingerprinting and quantitation of the glucosinolates and nucleosides in samples of Radix Isatidis have been carried out using high-performance liquid chromatography with diode-array detection and electrospray ionization tandem mass spectrometry(HPLC–DAD–ESI/MS).Five nucleosides together with one glucosinolate were identified by comparing retention times,ultraviolet spectra,mass spectra and/or empirical molecular formulae of reference compounds.Quantitation of these six compounds was carried out simultaneously by HPLC on a Phenomenex Luna C18 column using gradient elution with methanol and water and detection at 254 nm.All calibration curves were linear(r40.9994)within test ranges.Limits of detection and quantitation were 0.33 ng and 2.50 ng on column,respectively.Intra-and inter-day precision(as relative standard deviation)for all analytes was o2.19%with recoveries in the range 99.6%–101.8%at three concentration levels.The validated method was successfully applied to fingerprinting and assay of 25 batches of Radix Isatidis sourced from different geographical regions of China.The method is simple and reliable and has potential value in the quality control of Radix Isatidis.展开更多
基金supported by the Special Program for New Drug Innovation of the Ministry of Science and Technology,China(Nos.2011ZX09201-201-12 and 2011ZX09201-201-07).
文摘Multi-component fingerprinting and quantitation of the glucosinolates and nucleosides in samples of Radix Isatidis have been carried out using high-performance liquid chromatography with diode-array detection and electrospray ionization tandem mass spectrometry(HPLC–DAD–ESI/MS).Five nucleosides together with one glucosinolate were identified by comparing retention times,ultraviolet spectra,mass spectra and/or empirical molecular formulae of reference compounds.Quantitation of these six compounds was carried out simultaneously by HPLC on a Phenomenex Luna C18 column using gradient elution with methanol and water and detection at 254 nm.All calibration curves were linear(r40.9994)within test ranges.Limits of detection and quantitation were 0.33 ng and 2.50 ng on column,respectively.Intra-and inter-day precision(as relative standard deviation)for all analytes was o2.19%with recoveries in the range 99.6%–101.8%at three concentration levels.The validated method was successfully applied to fingerprinting and assay of 25 batches of Radix Isatidis sourced from different geographical regions of China.The method is simple and reliable and has potential value in the quality control of Radix Isatidis.
