Aims and objectives

The Drugs Working Group (DWG) was founded in June 1997 and supports the aims and objectives of the European Network of Forensic Science Institutes (ENFSI) in the area of forensic drug investigation. The main activity areas of DWG include, but are not limited to:

  • Quality assurance and accreditation
  • Professionalism in the field of drug analysis
  • Information exchange
  • Research & Development

The strategic goals of DWG are:

  • Acting as a platform for information exchange on new developments and trends
  • Organizing an annual conference type of meeting in addition to the business meeting
  • Promoting accreditation of member laboratories
  • Establishing quality assurance requirements
  • Preparing guidelines and recommendations regarding specific issues on drug analysis
  • Organizing proficiency tests
  • Enhancing the competence of forensic drug experts
  • Establishing a joint MS library for drugs related compounds
  • Influence on world-wide scale on the development of working practices by participation in the work of SWGDRUG
  • Co-ordination of the work between other organisations (SWGDRUG, UNODC and EMCDDA)


DWG has a steering committee and several subcommittees. The steering committee currently consists of:

  • Natasa Radosavljevic-Stevanovic (Serbia) – chairperson
  • Björn Ahrens (Germany) – deputy chairperson
  • Annette Sprong (Netherlands)
  • Fraser Paul Johnston (UK)
  • Maria Afxentiou Stylianou (Cyprus)
  • Malgorzata Galarda (Poland)


You can find the EWG’s Best Practice Manuals and Guidelines here in the Documents-Section.


You can contact the DWG chair Natasa Radosavljevic-Stevanovic by sending an email through our contact form. Please state clearly who your message is addressed to.

Otherwise you can send an e-mail to .


Find here our IR Library:


Version 2024.01.21. of our library contains 3643 spectra.

  • The list of entries is given here
  • ENFSI DWG IR Library Perkin 20240121 (.zip file)
    Containing ENDSIDWG.dlb and ENDSIDWG.slb spectral library files in format of Perkin Elmer Spectrum software
  • ENFSI DWG IR Library OMNIC 20240121 (.zip file)
    Containing spectral library files in format of Thermo Scientific OMNIC software
    This library format can’t contain spectra in various wavelength ranges therefore 5 subset libraries were created from spectra recorded in different wavelength range (Subset A-E)

           o    ENFSID_A.lbd and ENFSID_A.lbt – Spectra covering wavelength range 3976-401 cm-1

           o    ENFSID_B.lbd and ENFSID_B.lbt – Spectra covering wavelength range 3976-452 cm-1

           o    ENFSID_C.lbd and ENFSID_C.lbt – Spectra covering wavelength range 3976-616 cm-1

           o    ENFSID_D.lbd and ENFSID_D.lbt – Spectra covering wavelength range 3976-652 cm-1

           o    ENFSID_E.lbd and ENFSID_E.lbt – Spectra covering wavelength range 3976-700 cm-1

  • ENFSI DWG IR Library OPUS 20240121 (.zip file)
    Containing spectral library files in format of Bruker OPUS software
  • ENFSI DWG IR Library JCAMP 20240121 (.zip file)
    Containing individual spectral files of each entry in JCAMP-DX format (.jdx extension)
    Note: Some software offers .DX extension for JCAMP-DX format. You can open files having .jdx extension as well. Just type * as filename to search for all files in the File Open dialog.

Find here our MS Library:


Version 2023.05 of our library contains 1010 spectra.

  • The list of entries is given here
  • Here is the MS library in Agilent format

In case of any issue or question please do not hesitate to contact us by!