title: Determination of ambroxol in human plasma by high performance liquid chromatography-electrospray ionization mass spectrometry (HPLC-MS/ESI).
abstract: A rapid, sensitive and specific method to determination of ambroxol in human plasma using high performance liquid chromatography coupled with electrospray ionization mass spectrometry (HPLC-MS/ESI) was described. Ambroxol and the internal standard (I.S.), fentanyl, were extracted from plasma by N-hexane-diethyl ether (1:1, v/v) after alkalinized with ammonia water. A centrifuged upper layer was then evaporated and reconstituted with 100 microl mobile phase. Chromatographic separation was performed on a BDS HYPERSIL C18 column (250 mmx4.6 mm, 5.0 microm, Thermo electron corporation, USA) with the mobile phase consisting of 30 mM ammonium acetate (0.4% formic acid)-acetonitrile (64:36, v/v) at a flow-rate of 1.2 mL min(-1). The total run time was 5.8 min for each sample. Detection and quantitation was performed by the mass spectrometer using selected ion monitoring at m/z 261.9, 263.8 and 265.9 for ambroxol and m/z 337.3 for fentanyl. The calibration curve was linear within the concentration range of 1.0-100.0 ng mL(-1) (r=0.9996). The limit of quantification was 1.0 ng mL(-1). The extraction recovery was above 83.3%. The methodology recovery was higher than 93.8%. The intra- and inter-day precisions were less than 6.0%. The method is accurate, sensitive and simple for the study of the pharmacokinetics and metabolism of ambroxol.
authors: Clinical Pharmacy & Pharmacology Institute, Second Xiangya Hospital, Central South University, Changsha 410011, PR China. fenlisu@126.com
authors: Fenli
authors: F
authors: Su
authors: Feng
authors: F
authors: Wang
authors: Wei
authors: W
authors: Gao
authors: Huande
authors: H
authors: Li
mesh_terms: D000551:Ambroxol / Q000097:blood*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D006801:Humans; D015394:Molecular Structure; D015203:Reproducibility of Results; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*
chemical_list: D000551:Ambroxol