alexa Fast, fully automated analysis of voriconazole from serum by LC-LC-ESI-MS-MS with parallel column-switching technique.
Toxicology

Toxicology

Journal of Drug Metabolism & Toxicology

Author(s): Egle H, Trittler R, Knig A, Kmmerer K, Egle H, Trittler R, Knig A, Kmmerer K

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Abstract Voriconazole is a novel broad-spectrum antifungal agent. We developed an on-line LC-LC-MS-MS method for fully automated and direct analysis of voriconazole in raw human serum. After injection of human serum size-selective sample fractionation and analyte extraction was achieved using an extraction column (25 mm x 4 mm) packed with a restricted access material (RAM, LiChrospher ADS C(8), 25 microm). On-line transfer of voriconazole from the extraction column was followed by chromatography separation on a C(18) column. Detection was done by ESI-MS-MS. The total analysis time was 13 min, managed by parallel extraction and chromatographic separation. This LC-MS assay was fully validated. The lower limit of quantification was 0.05 microg/ml. The automated inline extraction of voriconazole described here eliminates the need for difficult and time-consuming sample pre-treatment. Other advantages of the new method are that only a small quantity (5 microl) of serum is needed and that the method is very specific. This article was published in J Chromatogr B Analyt Technol Biomed Life Sci and referenced in Journal of Drug Metabolism & Toxicology

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