title: Simultaneous quantification of voriconazole and posaconazole in human plasma by high-performance liquid chromatography with ultra-violet detection.
abstract: A sensitive and selective high-performance liquid chromatographic (HPLC) method with ultra-violet detection has been developed and validated for the simultaneous determination of posaconazole and voriconazole, two systemic anti-fungal agents. An internal standard diazepam was added to 100 microL of human plasma followed by 3 mL of hexane-methylene chloride (70:30, v/v). The organic layer was evaporated to dryness and the residue was reconstituted with 100 microL of mobile phase before being injected in the chromatographic system. The compounds were separated on a C8 column using sodium potassium phosphate buffer (0.04 M, pH 6.0): acetonitrile:ultrapure water (45:52.5:2.5, v/v/v) as mobile phase. All compounds were detected at a wavelength of 255 nm. The assay was linear and validated over the range 0.2-10.0 mg/L for voriconazole and 0.05-10.0 mg/L for posaconazole. The biases were comprised between -3 and 5% for voriconazole and -2 and 8% for posaconazole. The intra- and inter-day precisions of the method were lower than 8% for the routine quality control (QC). The mean recovery was 98% for voriconazole and 108% for posaconazole. This method provides a useful tool for therapeutic drug monitoring.
authors.affiliation: Université Paris V, Faculté de Médecine René Descartes, Assistance Publique-Hôpitaux de Paris, Service de Pharmacologie Clinique, Groupe Hospitalier Cochin-Saint-Vincent de Paul, 74-82 avenue Denfert-Rochereau, 75674 Paris Cedex 14, France.
authors.forename: Stéphanie
authors.initials: S
authors.lastname: Chhun
authors.forename: Elisabeth
authors.initials: E
authors.lastname: Rey
authors.forename: Agnes
authors.initials: A
authors.lastname: Tran
authors.forename: Olivier
authors.initials: O
authors.lastname: Lortholary
authors.forename: Gérard
authors.initials: G
authors.lastname: Pons
authors.forename: Vincent
authors.initials: V
authors.lastname: Jullien
mesh_terms: D000935:Antifungal Agents / Q000097:blood*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D006801:Humans; D011743:Pyrimidines / Q000097:blood*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013056:Spectrophotometry, Ultraviolet / Q000379:methods*; D014230:Triazoles / Q000097:blood*; D065819:Voriconazole
chemical_list: D000935:Antifungal Agents; D011743:Pyrimidines; D014230:Triazoles; D065819:Voriconazole