Simultaneous determination of primaquine and carboxyprimaquine in plasma using high-performance liquid chromatography with electrochemical detection

Robert A. Dean, Willis Ochieng, John Black, Sherry F. Queener, Marilyn S. Bartlett, Natividad G. Dumaual

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A selective and sensitive high-performance liquid chromatographic method with electrochemical detection is described for the simultaneous quantitation of primaquine and carboxyprimaquine, its primary metabolite, in plasma. After addition of internal standard, plasma was deproteinized by addition of acetonitrile. Nitrogen-dried supernatants, resuspended in mobile phase were analyzed on a C8 reversed-phase column. Limits of detection for primaquine and carboxyprimaquine were 2 and 5 ng/ml with quantitation limits of 5 and 20 ng/ml, respectively. None of 47 tested antimicrobial agents interfered. In contrast to previously reported methods, the assay sensitivity and specificity are sufficient to permit quantitation of primaquine in plasma for pharmacokinetics following low dose (30 mg, base) oral administration of primaquine, typically used in the treatment of malaria and Pneumocystis carinii pneumonia.

Original languageEnglish (US)
Pages (from-to)89-96
Number of pages8
JournalJournal of Chromatography B: Biomedical Sciences and Applications
Issue number1
StatePublished - Apr 22 1994


ASJC Scopus subject areas

  • Chemistry(all)

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