Determination of δ9-tetrahydrocannabinol in human blood and saliva by high-performance liquid chromatography with amperometric detection

Loren K. Thompson, Edward J. Cone

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A rapid, sensitive and selective determination of δ9-tetrahydrocannabinol (THC)_in human plasma, serum and saliva was developed with high-performance liquid chromatography with electrochemical detection. Initially, samples were deproteinized, followed by a one step liquid-liquid extraction. Samples were measured by high-performance liquid chromatography with electrochemical detection with 4-dodecylresorcinol as the internal standard. The minimal detectable limit for THC in biological samples was ca. 1 ng/ml with a signal-to-noise ratio >3, corresponding to an on-column sensitivity for THC of ca. 0.5 ng. The detector was operated at +0.90 V vs. Ag/AgCl and exhibited linearity over a concentration range of 1-150 ng/ml with correlation coefficients of the standard curves > 0.99.

Original languageEnglish (US)
Pages (from-to)91-97
Number of pages7
JournalJournal of Chromatography B: Biomedical Sciences and Applications
Issue numberC
StatePublished - 1987


ASJC Scopus subject areas

  • Chemistry(all)

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