title: Determination of codeine in human plasma by high-performance liquid chromatography with fluorescence detection.
abstract: A rapid, reliable and rugged assay for determining codeine in human plasma using reversed-phase high-performance liquid chromatography with fluorescence detection was developed. This analytical method utilized an ion-exchange/mixed-mode solid-phase extraction procedure. The chromatographic separation was achieved using a 150 x 4.6 mm I.D., 3-microns reversed-phase C8 (deactivated for basic analytes) column at ambient temperature. Fluorescence detection (excitation at 214 nm and emission above 345 nm) for codeine and nalorphine allowed for a detectable limit of 5 ng/ml. The results showed that the method was linear from 10 to 300 ng/ml. The method had good reproducibility, precision, accuracy and recoveries of 91 and 90% for codeine and nalorphine, respectively. This method has been applied to study the pharmacokinetics of codeine in normal human subjects.
authors.affiliation: Purdue Frederick Company, Purdue Research Center, Department of Pharmacokinetics/Drug Metabolism, Yonkers, NY 10701, USA.
authors.forename: B
authors.initials: B
authors.lastname: Weingarten
authors.forename: H Y
authors.initials: HY
authors.lastname: Wang
authors.forename: D M
authors.initials: DM
authors.lastname: Roberts
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D003061:Codeine / Q000097:blood*; D006801:Humans; D009269:Nalorphine / Q000097:blood; D015203:Reproducibility of Results; D013050:Spectrometry, Fluorescence
chemical_list: D009269:Nalorphine; D003061:Codeine