Forensic Toxicology

, Volume 36, Issue 2, pp 320–333 | Cite as

Organ distribution of 4-MEC, MDPV, methoxetamine and α-PVP: comparison of QuEChERS and SPE

  • Sabrina Lehmann
  • Bastian Schulze
  • Andreas Thomas
  • Thomas Kamphausen
  • Mario Thevis
  • Markus A. Rothschild
  • Katja Mercer-Chalmers-Bender
Original Article

Abstract

Purpose

An organ distribution investigation was carried out on two deceased (A and B) who consumed 4-methylethcathinone (4-MEC), methylenedioxypyrovalerone (MDPV), methoxetamine (MXE) and α-pyrrolidinopentiophenone (α-PVP).

Methods

The detection of the aforementioned drugs in the specimens was performed on a liquid chromatography–tandem mass spectrometry system. Two different extraction methods were compared with each other—a quick, easy, cheap, effective, rugged and safe (QuEChERS) approach and an automated Instrument Top Sample Preparation-solid phase extraction (ITSP-SPE). Standard addition method was used to quantify the drugs.

Results

4-MEC, MDPV and MXE were detected in all collected tissues and body fluids of the two deceased. α-PVP was also detectable in deceased A. Deceased A showed femoral blood concentrations of 97 µg/L 4-MEC, 396 µg/L MDPV, 295 µg/L MXE and 4 µg/L α-PVP measured after extraction by QuEChERS and 118 µg/L 4-MEC, 342 µg/L MDPV, 385 µg/L MXE and 4 µg/L α-PVP measured after ITSP-SPE. Deceased B revealed heart blood concentrations of 8 µg/L 4-MEC, 3 µg/L MDPV and 2 µg/L MXE after extraction by QuEChERS and 8 µg/L 4-MEC and 1 µg/L MXE after ITSP-SPE.

Conclusions

Both preparation techniques were suitable for quantifying NPS in organ tissues and body fluids. With respect to the autopsy findings, the cause of death of deceased A was determined to be an acute intoxication with NPS. No certain cause of death could be ascertained for deceased B.

Keywords

Organ distribution New psychoactive substances 4-MEC QuEChERS ITSP-SPE LC–MS/MS 

Notes

Acknowledgements

The authors wish to thank Scientific Instruments Manufacturer GmbH (Oberhausen, Germany) for generously providing the ITSP-SPE system for this research. We thank Dr. June Mercer-Chalmers-Bender for editorial support and prosecutor Jörg Schindler for his supporting in gathering and providing relevant case information. This work was partly funded by the Federal Ministry for Economic Affairs and Energy on the basis of a decision by the German Bundestag, grant no. KF2429613MD3.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

All experiments comply with the current laws of the Federal Republic of Germany. The Department of Public Prosecution of Cologne gave permission for the publication of this case. The article does not contain any studies with animals performed by any of the authors. Informed consent was obtained from a healthy subject who provided small volumes of blank blood for use in the validation experiments.

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Copyright information

© Japanese Association of Forensic Toxicology and Springer Japan KK, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Institute of Legal Medicine, Faculty of MedicineUniversity of CologneCologneGermany
  2. 2.Institute of BiochemistryGerman Sport University CologneCologneGermany
  3. 3.Institute of Forensic MedicineUniversity of Basel, Health Department BaselBaselSwitzerland

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