Rapid determination of nevirapine in human plasma by gas chromatography

A sensitive and rapid gas chromatographic method has been developed to determine the levels of the HIV-1 non-nucleoside reverse transcriptase inhibitor nevirapine in human plasma. Quantitative recovery following liquid–liquid-extraction with diethylether from 500 μl of human plasma was achieved. Subsequently, the assay was performed with a CP-Sil 5CB capillary column, 15 m×0.32 mm×1.0 μm film thickness with a nitrogen–phosphorous-detector (NPD), Helium 5.0 was used as carrier gas with a constant inlet pressure of 7 p.s.i. Linear standard curves were obtained for concentrations ranging from 10 to 20 000 ng/ml. The calculated intra- and inter-day coefficients of variation were below 8%.