Abstract
A simple, sensitive and specific high-performance liquid chromatography mass spectrometry (LC-MS) method was developed and validated for the quantification of strictosamide in dog plasma. Strictosamide and internal standard (IS, ranolazine) extracted by liquid-liquid extraction with ethyl acetate were separated on a C(18) column using a gradient elution program. The detection was performed by selected ion monitoring mode via a positive electrospray ionization interface. The LLOQ was 1.0 ng/mL and the method exhibited acceptable precision, extraction efficiency and matrix effect. Finally, this proposed method was successfully applied to dog pharmacokinetic study and yielded the most comprehensive data on systemic exposure of strictosamide to date.
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