Simultaneous quantification of voriconazole and posaconazole in human plasma by high-performance liquid chromatography with ultra-violet detection

J Chromatogr B Analyt Technol Biomed Life Sci. 2007 Jun 1;852(1-2):223-8. doi: 10.1016/j.jchromb.2007.01.021. Epub 2007 Feb 1.


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.

Publication types

  • Validation Study

MeSH terms

  • Antifungal Agents / blood*
  • Chromatography, High Pressure Liquid / methods*
  • Humans
  • Pyrimidines / blood*
  • Reproducibility of Results
  • Sensitivity and Specificity
  • Spectrophotometry, Ultraviolet / methods*
  • Triazoles / blood*
  • Voriconazole


  • Antifungal Agents
  • Pyrimidines
  • Triazoles
  • Voriconazole