Sensitive liquid chromatography/tandem mass spectrometry method for the determination of the lipophilic antipsychotic drug chlorpromazine in rat plasma and brain tissue

Guodong Zhang, Alvin V Terry, Michael G. Bartlett

Research output: Contribution to journalArticle

32 Scopus citations

Abstract

A simple, sensitive and robust liquid chromatography/electrospray ionization tandem mass spectrometry (LC-ESI-MS/MS) method was developed and validated for quantification of chlorpromazine in rat plasma and brain tissue. Chlorpromazine was extracted from rat plasma and brain homogenate using liquid-liquid extraction. The compounds were separated on a Waters Atlantis™ dC-18 (30 mm × 2.1 mm i.d., 3 μm) column using a mobile phase of acetonitrile/20 mM ammonium formate (pH 4.25 adjusted with formic acid) with gradient elution. Chlorpromazine was detected in positive ion mode using multiple reaction monitoring (MRM). The method was validated and the specificity, linearity, lower limit of quantitation (LLOQ), precision, accuracy, recoveries and stability were determined. The LLOQ was 0.2 ng/ml for plasma and 0.833 ng/g for brain tissue. The method was linear over the concentration range from 0.2 to 200.0 ng/ml for plasma and from 0.833 to 833.3 ng/g for brain tissue. The correlation coefficient (R2) values were more than 0.998 for both plasma and brain homogenate. The precision and accuracy for intra-day and inter-day were better than 7.54%. The relative and absolute recovery was above 84.9% and matrix effects were lower than 5.6%. This validated method has been successfully used to quantify the rat plasma and brain tissue concentration of chlorpromazine after chronic treatment.

Original languageEnglish (US)
Pages (from-to)68-76
Number of pages9
JournalJournal of Chromatography B: Analytical Technologies in the Biomedical and Life Sciences
Volume854
Issue number1-2
DOIs
StatePublished - Jul 1 2007

Keywords

  • Brain tissue
  • Chlorpromazine
  • LC-MS/MS
  • Plasma

ASJC Scopus subject areas

  • Biochemistry

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