Um método simples, sensível e seletivo para determinação de voriconazol em plasma e fluido oral empregando cromatografia líquida de ultra-eficiência foi desenvolvido e validado. Após extração líquido-líquido do plasma e fluido oral com metil-tert-butil éter, o analito e o padrão interno foram separados numa coluna Hypersil Gold C18 (2,1 × 100 mm, d.p. 1,9 µm), eluída isocraticamente com uma mistura de tampão fosfato trietilamônio pH 3,0 e acetonitrila (70:30, v/v). O tempo total da análise foi de 4 min, com consumo total de fase móvel de 2,2 mL. A determinação foi realizada com detector de arranjo de fotodiodos com quantificação em 256 nm. As concentrações de voriconazol no fluido oral foram, em média, 57,5% (± 5,3) daquelas determinadas em amostras pareadas de plasma.A simple, sensitive and selective ultra-performance liquid chromatography method for the determination of voriconazole in plasma and oral fluid was developed and validated. After a liquidliquid extraction with methyl-tert-butyl ether, the analyte and internal standard were separated on a Hypersil Gold C18 column (2.1 × 100 mm, p.d. 1.9 µm), eluted with a mobile phase composed of thietylammonium phosphate buffer and acetonitrile (70:30, v/v). Total run time was 4 min, total mobile phase consumption of 2.2 mL. Detection was performed with a photodiode array detector with quantitation at 256 nm. Voriconazole concentrations in oral fluid were on average 57.5% (± 5.3) of those measured in paired plasma samples.
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