Abstract
The first HPLC-fluorescence method for the determination of atomoxetine in human plasma was developed and validated. Atomoxetine was derivatized with 4-(4,5-diphenyl-1H-imidazol-2-yl) benzoyl chloride (DIB-Cl) under mild conditions, and separated isocratically on a C18 column using a HPLC system with fluorescence detection (λex: 318 nm, λem: 448 nm). A linear calibration curve was obtained over the concentration range 1–1000 ng/mL ( r = 0.999). The limit of detection (S/N = 3) was 0.3 ng/mL. The relative standard deviations of intra-day and inter-day variations were ≤8.30% and 7.47%, respectively. This method is rapid, sensitive, and suitable for both basic and clinical studies of atomoxetine.
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