Comparison of the solid phase and liquid-liquid extraction methods for methadone determination in human serum and whole blood samples using gas chromatography/mass spectrometry

  • Maja Veršić Bratinčević University of Split School of Medicine
  • Tanja Visković University Hospital Centre Split
  • Davorka Sutlović University of Split School of Medicine and University Hospital Centre Split
Keywords: biological samples, liquid-liquid extraction, extraction techniques, methadone, GC/MS, serum samples, substitution therapy, solid-phase extraction, whole blood samples

Abstract

The aim of this study was to determine the optimal biological sample and the optimal extraction technique for monitoring methadone concentrations in biological samples. We analysed methadone in serum and whole blood samples using gas chromatography/mass spectrometry (GC/MS). Before analysis, we compared five solid-phase extraction (SPE) and two liquid-liquid extraction (LLE) methods and determined that SPE with Supelco LC-18 in serum yielded the best extraction efficiency. The limit of detection was 10 ng mL-1 and the limit of quantification 25 ng mL-1. Correlation coefficient was over 0.999 for the methadone calibration curve in linear range from 50 to 2000 ng mL-1. Intra and inter-day accuracy and precision of the method was satisfactory. The method was successfully applied for determining serum methadone in patients on maintenance therapy.

Author Biographies

Maja Veršić Bratinčević, University of Split School of Medicine
Department of Forensic Medicine
Tanja Visković, University Hospital Centre Split
Department of Pathology and Forensic Medicine
Davorka Sutlović, University of Split School of Medicine and University Hospital Centre Split
Department of Forensic Medicine; Department of Pathology and Forensic Medicine

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Published
2017-12-05
How to Cite
1.
Veršić Bratinčević M, Visković T, Sutlović D. Comparison of the solid phase and liquid-liquid extraction methods for methadone determination in human serum and whole blood samples using gas chromatography/mass spectrometry. AIHT [Internet]. 5Dec.2017 [cited 16Aug.2018];68(4). Available from: https://arhiv.imi.hr/index.php/arhiv/article/view/716
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Original article