An investigation of liquid chromatography-mass spectral attributes and analytical performance characteristics of tenofovir, emtricitabine and efavirenz in human plasma

Sedireng M. Ndolo, Kwenga Sichilongo, Amos Massele, Enoch Sepako, Sandro Vento

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Liquid chromatography (LC) and mass spectral behavior and analytical performance characteristics of efavirenz (EFV), emtricitabine (EMT) and tenofovir (TFV), i.e., individual components of Atripla®, were probed. This was followed by estimation of their analytical performance characteristics employing LC and a parallel direct infusion sample introduction procedure. Performance characteristics using both types of sample introduction procedures were compared. Using liquid chromatography-mass spectrometry (LC-MS), linearities, i.e., correlation coefficients of the calibration curves of EFV, EMT and TFV, ranged between 0.9300 and 0.9990 in the full scan, selected ion monitoring and mass spectrometry/mass spectrometry (MS-MS) modes. The limits of detection (LODs) ranged between 0.5 and 11.6 μg/L. The lower limits of quantification (LLOQs) and the upper limits of quantification (ULOQs) were in the ranges of 0.9-23.2 and 1.6-38.7 μg/L, respectively. The LODs ranged between 0.8 and 114.7 μg/L. The LLOQs and the ULOQs were in the ranges of 1.6-29.4 and 2.7-49.0 μg/L, respectively. In the case of EMT, sodiated molecular ion at m/z 270 was used to adduce analytical performance characteristics from which lower detection limits were obtained compared with those in the literature where [M+H]+ at m/z 248 was used.

Original languageEnglish
Article numberbkv119
Pages (from-to)49-57
Number of pages9
JournalJournal of Analytical Toxicology
Volume40
Issue number1
DOIs
Publication statusPublished - Jan 1 2016
Externally publishedYes

ASJC Scopus subject areas

  • Analytical Chemistry
  • Environmental Chemistry
  • Medicine(all)
  • Toxicology
  • Chemical Health and Safety
  • Health, Toxicology and Mutagenesis

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