The ADEBAR project is a cooperation project in Germany funded by the EU's Internal Security Fund. It was initiated in July 2017 (Grant No. IZ25-5793-2016-27) and was funded for 2 years. From September 2019 to February 2023 the work has been continued as ADEBAR plus (Grant No. IZ25-5793-2019-33). The project is continued as NETZWERK ADEBAR (Grant No. ISF-5793-23-0049) since December 2023 until November 2027. The competence network is made up of the Federal Criminal Police Office (BKA), seven State Bureaus of Criminal Investigation (LKA) (Bavaria (BY), Berlin (BE), Baden-Wuerttemberg (BW), Hesse (H), North-Rhine Westphalia (NRW), Rhineland-Palatinate (RLP), Schleswig-Holstein (SH)), the Education and Science Centre of the Federal Finance Administration (General Directorate of Customs, BWZ) and since the follow-up projects also the universities of Mainz, Münster and Freiburg.
The acronym “ADEBAR” stands for the expansion of analytical databases through collection and nationwide and international publication of analytical and pharmacological data, spectra of metabolites and the distribution of reference materials for substances newly appearing on the drug market (Ausbau analytischer Datenbanken, Erhebung und bundesweite sowie internationale Bereitstellung von analytischen Daten, pharmakologischen Daten, Metabolitenspektren und Referenzmaterialien für neu auf dem Drogenmarkt auftretende Stoffe [German]).
ADEBAR plus builds on the success of the previous project ADEBAR (July 2017 to June 2019) and has been expanded to include method development, pharmacological assessment, and synthesis of designer drugs. The project NETZWERK ADEBAR is expanded by the field of electrochemical synthesis of designerdrug metabolites and comparison of the occurrence in body fluids. In addition to analyzing the samples seized by the German police and customs, samples proactively test-purchased from the internet are analyzed within the ADEBAR project contributing to preparedness in the field of analytical identification.
Coordination of structural analysis of substances recently emerging on the drug market
Collection and publication of valid analytical data for the unambiguous identification
Unambiguous identification of isomeric compounds especially from the annexes of the National Narcotics Law
Provision of reference material for all police and customs laboratories
Synthesis and characterization of new designer drug variants
Collection of pharmacological parameters for NPS and designer drug variants
Electrochemical synthesis of NPS degradation products (metabolites) and their comparison with the occurrence in body fluids
Conducting Round Robin Tests for new psychoactive substances for comparative laboratory tests
Organization of a symposium with an analytical focus for employees of all police and customs forensic laboratories
Expansion of the internationally accessible, web-based database platform NPS Data Hub, which was developed in the ADEBAR projects
Accompaniment of legislative projects and amendments in the field of new psychoactive substances (NPS) and narcotics
Close cooperation with the EMCDDA/EUDA
Nine forensic institutes of the German police and Customs are involved in the analytical process. The universities are pivotal in the areas of synthesis, pharmacological evaluation and research of metabolites of NPS. Each analytical project partner fulfills a particular aspect within the competence network. The scientific headquarter of the project is situated in Kiel at the State Bureau of Criminal Investigation Schleswig-Holstein, and most analytical data acquisition, processing, and publication are performed here. Like the other forensic institutes in Germany, not all analytical techniques are available in Kiel. Thus, within the ADEBAR project framework, the analytical capabilities of the project partners are leveraged to acquire a comprehensive analytical dataset. Through the multitude of analytical instrumentation available in the project partners' laboratories, the application scope of the analytical dataset is expanded to more forensic practitioners in the EU and beyond. The expertise of different project partners is also used to develop new methods for quantifying NPS.
New variants of synthetic cannabinoids that could appear on the market in the future are specifically synthesized by the Organic Chemistry Institute of the University of Mainz.
At the University Medical Centre Freiburg - Institute of Forensic Medicine, receptor binding affinity and intrinsic activity are determined for newly emerged and specifically synthesised designer drugs. The pharmacological data are essential parameters for the evaluation of the psychotropic effect and potency of the de- signer drug variants.
Throughout the ADEBAR project, the NPS Data Hub, an internationally accessible database for analytical data of NPS, has been expanded to enhance user-friendliness coordinated by the BKA. One of the milestones in the further development of the NPS Data Hub was the provision of an automated testing tool for all German forensic chemical investigation bodies to assess substances for conformity to the NpSG.
Furthermore, the instrumental competencies in the BKA allow for the determination of the purity of large seizures and thus the generation of reference material with a certificate of analysis for distribution among all German forensic laboratories of police and customs.
The workflow mechanisms of structural elucidation for new substances and analytical data acquisition on known substances within the ADEBAR project is illustrated in a process flow chart below (see below). The samples are characterized using spectroscopic and spectrometric techniques (GC–MS, [N]IR, GC-sIR, NMR, LC-[HR]MS, and Raman). Once substance characterization has been completed, the analytical report is prepared on the findings and published nationally, Europe-wide, and globally, including the timely transmission of reports to the Early Warning System (EWS) of the EMCDDA. The reports and the analytical data converted into universal electronic formats are made available via national and international forums and databases free of charge.
The selection of analytical techniques necessary to reach a scientifically sound conclusion depending on the analytical question presented can be derived from the analytical scheme of the recommendations of the Scientific Working Group for the Analysis of Seized Drugs (SWGDRUG) and the best practice manual of the European Network of Forensic Science Institutes (ENFSI). Analytical techniques are stratified according to their level of selectivity achievable under ideal circumstances. Category A analytical techniques achieve the highest selectivity for reliable identification of analytes. The unequivocal identification of a compound according to recommendations by SWGDRUG and ENFSI requires the combination of uncorrelated analytical techniques that exploit different chemical and physical properties. Combinations of two analytical techniques, with at least one being of category A, or a combination of three (two category B + one category C) are sufficient. Within the ADEBAR project, the minimum requirement for a valid identification always requires two analytical techniques of category A in the analytical scheme to reliably differentiate closely related isomers.
The ADEBAR project holds a vital role in the structural elucidation and characterization of NPS appearing on the drug market in the EU. The close collaboration of the ADEBAR project with the EMCDDA/EUDA results in the timely exchange of information and better monitoring of the spread and potential harms associated with NPS. This data exchange facilitates the timely reporting of the detection of NPS in other member states of the EU. The dynamic of the NPS and designer drug market is unlikely to subside in the future. Additional research by big pharmaceutical companies, especially in the area of cannabinoid receptor modulators, could lead to the emergence of new classes of synthetic cannabimimetics. A central institution for the structure elucidation and acquisition of valid, high-quality analytical data is important in the future.