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Determination of dicentrine in rat plasma by high-performance liquid chromatography and its application to pharmacokinetics

1996; Elsevier BV; Volume: 681; Issue: 2 Linguagem: Inglês

10.1016/0378-4347(95)00553-6

1872-812X

Tung‐Hu Tsai, Tong‐Rong Tsai, Cheng‐Jen Chou, Chieh-Fu Chen,

Neuroscience and Neuropharmacology Research

A simple high-performance liquid chromatographic method was developed to study the pharmacokinetics of dicentrine in rat plasma after 10 mg/kg intravenous administration. After addition of an internal standard (coumarin), plasma was deproteinized by acetonitrile for sample clean-up. The drugs were separated on a reversed-phase Nucleosil C18 column (250 × 4 mm I.D., particle size 5 μm) and detected by photodiode-array detection at a wavelength of 308 nm. Acetonitrile-water (35:65, v/v, pH 2.5–2.8, adjusted with orthophosphoric acid) was used as the mobile phase. A biphasic phenomenon with a rapid distribution followed by a slower elimination phase was observed from the plasma concentration-time curve.