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Background : In this study antiretroviral drugs of the classes protease inhibitors (PI) and non-nucleoside reverse transcriptase inhibitors (NNRTI) were quantified for the first time directly in patient plasma samples by means of an automated and validated online solid-phase extraction-liquid chromatography-tandem mass spectrometry (XLC-MS/MS) method using the Symbiosis Pharma ®  system (Spark Holland) for XLC coupled to an API 2000 for MS/MS analysis.

clinical chemistry and laboratory medicine (cclm)

Direct and fast determination of antiretroviral drugs by automated online solid-phase extraction-liquid chromatography-tandem mass spectrometry in human plasma