کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1222812 | 967871 | 2008 | 9 صفحه PDF | دانلود رایگان |

Gastrodin is a pharmacologically active substance isolated from Gastrodia elata Blume with sedation, anti-convulsion and anti-epilepsy activities. A rapid and sensitive liquid chromatography technique coupled to tandem mass spectrometry (LC–MS/MS) system was developed to determine gastrodin and its metabolite p-hydroxybenzyl alcohol (HBA) in rat blood, brain and bile collected using microdialysis technique. The analytes were separated using a reversed phase column (4.6 mm × 150 mm, 5 μm). The mobile phase for column separation was 30% methanol with a flow rate of 0.6 mL/min. As a post-column addition, 1% ammonium hydroxide solution (in methanol) was additionally pumped via a T-connection using a chromatographic pump (BAS PM-80, USA) at a flow rate of 0.2 mL/min after the column separation. A LC–MS/MS system equipped with a negative electrospray ionization (ESI) source in multiple reaction monitoring (MRM) mode was used to monitor m/z 285.0 → 122.9 and m/z 123.0 → 105.0 transitions for gastrodin and HBA, respectively. The lower limit of quantification (LLoQ) for gastrodin and HBA were 0.5 and 2 ng/mL, respectively. The calibration curves were linear over the range of 0.5–5000 ng/mL and 2–1000 ng/mL for gastrodin and HBA with a coefficient of determination >0.995, respectively. This selective and sensitive method is useful for the determination of gastrodin and HBA and in the pharmacokinetic studies of these compounds.
Journal: Journal of Pharmaceutical and Biomedical Analysis - Volume 48, Issue 3, 4 November 2008, Pages 909–917