Abstract:
:Both borneol and menthol are bioactive substances derived from Chinese herbal medicines. In order to understand the pharmacokinetics of borneol and menthol in Qingyan drop pills, a rapid, sensitive, and simple gas chromatographic (GC) method with flame ionization detection (FID) was developed for the simultaneous determination of borneol and menthol in rat plasma. Sample preparations were carried out by liquid-liquid extraction (LLE) with an internal standard solution of naphthalene. The analytes and internal standard (IS, naphthalene) were separated well on an HP-1 capillary column. The pharmacokinetic parameters were estimated by a compartmental method using the Phoenix WinNonlin software program (Version 6.0). The standard curves were linear over a wide concentration range of 2.5-50.0 ng/µL ( R = 0.9963), 8.7-62.2 ng/µL ( R = 0.9994) for both borneol and menthol in plasma, respectively. The limits of quantification (LOQ) of borneol and menthol in plasma were 2.4 ng/µL and 5.0 ng/µL, respectively. The intra-day precisions for borneol and menthol were < or = 10.0 % R. S. D. at the LOQ and < or = 6.0 % at higher concentrations. The average value of CMAX was 18.97 ± 2.71 ng/µL with a TMAX at 20.00 ± 0.00 min for borneol after oral administration of the drop pills; for menthol, the average value of CMAX was 79.02 ± 11.40 ng/µL with a TMAX at 25.00 ± 4.40 min. This validated assay method was successfully applied to a pharmacokinetic study of borneol and menthol after oral administration of Qingyan drop pills in rat. The results showed that the kinetics of borneol and menthol can be described by an open one-compartment model. The pharmacokinetic parameters provide some information for clinical administration of Qingyan drop pills.
journal_name
Planta Medjournal_title
Planta medicaauthors
Xu X,Li Y,Hou J,Zhang S,Xu Y,Wang Y,Zhang Y,Liu C,He Xdoi
10.1055/s-0030-1270998subject
Has Abstractpub_date
2011-09-01 00:00:00pages
1600-4issue
14eissn
0032-0943issn
1439-0221journal_volume
77pub_type
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