title: Determination of menthol in plasma and urine of rats and humans by headspace solid phase microextraction and gas chromatography--mass spectrometry.
abstract: A method for the determination of menthol and menthol glucuronide (M-G) after enzymatic hydrolysis in plasma and urine of rats and humans was developed using headspace solid phase microextraction and gas chromatography-mass spectrometry in the selected ion monitoring mode (HS-SPME/GC-MS). The assay linearity for plasma ranged from 5 to 1000 ng/ml. The limit of quantification (LOQ) in plasma was 5 ng/ml. The intra- and inter-day precision for menthol and M-G were < or = 18.1% R.S.D. at the LOQ and < or = 4.0% at higher concentrations. Menthol and M-G were determined in rat and human plasma and urine after administration of menthol.
authors.affiliation: Laboratory for Phytopharmacology, Bioanalytics & Pharmacokinetics, Department of Clinical Research, University of Bern, Murtenstrasse 35, 3010 Bern, Switzerland.
authors.forename: Miriam
authors.initials: M
authors.lastname: Spichiger
authors.forename: Roman C
authors.initials: RC
authors.lastname: Mühlbauer
authors.forename: Rudolf
authors.initials: R
authors.lastname: Brenneisen
mesh_terms: D000818:Animals; D002851:Chromatography, High Pressure Liquid; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D008610:Menthol / Q000032:analysis* / Q000097:blood / Q000652:urine; D051381:Rats; D017208:Rats, Wistar; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
chemical_list: D008610:Menthol