Figure 3: Typical chromatograms of a blank plasma spiked with 5 ngdofetilide, 10 ng amlodipine and internal standard [plain line] and a blank plasma spiked with 50 ngdofetilide, 75 ng amlodipine and internal standard [dash line] (upper chromatogram) and a control blank plasma (lower chromatogram). The chromatographic conditions for detection (box) and buffer gradient (dotted line) were pointed out.