title: Determination and pharmacokinetics of gastrodin and p-hydroxybenzylalcohol after oral administration of Gastrodia elata Bl. extract in rats by high-performance liquid chromatography-electrospray ionization mass spectrometric method.
abstract: In this report, a high-performance liquid chromatography-electrospray ionization mass spectrometric (HPLC-MS) method was used to determine gastrodin (GAS) and p-hydroxybenzylalcohol (HBA) in rat plasma after oral administration of Gastrodia elata Bl. (Chinese name: Tianma) extract. Up to 200 microl of plasma containing GAS, HBA and pyromucic acid (as internal standard, IS) were deproteinized with six volumes of methanol. Calibration curves showed linearity within the concentration range tested 2.00-200.00 microg/ml for GAS and 0.832-104.00 microg/ml for HBA in plasma with a correlation coefficient (r) greater than 0.9997. The limit of quantification of 2.00 and 0.83 microg/ml for GAS and HBA had been achieved, respectively. The intra-day and inter-day precisions of the method were determined to be less than 17.82% for GAS and 10.21% for HBA. The recoveries were in the range of 91.12-108.64% with RSD less than 7.80% for GAS and 92.91-106.14% with RSD less than 4.30% for HBA. Evidence showed that a rapid, simple and reproducible LC-MS assay was established to determine GAS and HBA in rat plasma.
authors.affiliation: Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, PR China.
authors.forename: W
authors.initials: W
authors.lastname: Zhang
authors.forename: Y X
authors.initials: YX
authors.lastname: Sheng
authors.forename: J L
authors.initials: JL
authors.lastname: Zhang
mesh_terms: D000284:Administration, Oral; D000818:Animals; D001592:Benzyl Alcohols / Q000008:administration & dosage / Q000097:blood / Q000493:pharmacokinetics*; D002138:Calibration; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D031668:Gastrodia / Q000737:chemistry*; D005960:Glucosides / Q000008:administration & dosage / Q000097:blood / Q000493:pharmacokinetics*; D010936:Plant Extracts / Q000008:administration & dosage / Q000494:pharmacology*; D051381:Rats; D012015:Reference Standards; D015203:Reproducibility of Results; D021241:Spectrometry, Mass, Electrospray Ionization
chemical_list: D001592:Benzyl Alcohols; D005960:Glucosides; D010936:Plant Extracts; C018966:4-hydroxybenzyl alcohol; C045345:gastrodin