title: Optimized determination of lycopene in canine plasma using reversed-phase high-performance liquid chromatography.
abstract: An isocratic high-performance liquid chromatographic method with detection at 472 nm was developed, optimized and validated for the determination of lycopene in canine plasma. Ethyl-beta-apo-8'-carotenoate was used as internal standard. A Hypersil BDS RP-C18 column (150 mm x 4.6 mm), 5 microm particle size, was equilibrated with a mobile phase composed of acetonitrile and methanol (50:50, v/v). Its flow rate was 1.5 ml/min. The elution time for lycopene and ethyl-beta-apo-8'-carotenoate was approximately 11 and 5 min, respectively. Calibration curves of lycopene were linear in the concentration range of 3-200 ng/ml in plasma. Limits of detection and quantification in plasma were 1 and 4 ng/ml, respectively. Recovery was greater than 97%. Intra- and inter-day relative standard deviation for lycopene in plasma was less than 1.8 and 3.1%, respectively. This method was applied to the determination of lycopene plasma levels after single dose administration to dogs.
authors.affiliation: Laboratory of Biopharmaceutics and Pharmacokinetics, School of Pharmacy, National and Kapodistrian University of Athens, Panepistimiopolis, Athens 15771, Greece.
authors.forename: M V
authors.initials: MV
authors.lastname: Vertzoni
authors.forename: C
authors.initials: C
authors.lastname: Reppas
authors.forename: H A
authors.initials: HA
authors.lastname: Archontaki
mesh_terms: D000818:Animals; D002338:Carotenoids / Q000097:blood*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D004285:Dogs; D005260:Female; D000077276:Lycopene; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
chemical_list: D002338:Carotenoids; D000077276:Lycopene