The result of a forensic chemical examination is reported in a so-called forensic chemical declaration. The declaration mainly includes a brief description of the substance groups tested for, followed by a list of the substances detected and their concentration. A toxicological assessment is included at the end of the declaration. The toxicological assessment describes, for the current case and for each substance, whether the concentration detected is within the therapeutic, toxic or lethal range; and often the ‘graduation’ is narrowed even further. In cases with many substances, where there is a possibility of mutually reinforcing effects, an overall assessment is included as well. Finally, each substance is characterised briefly; for example whether it is a drug, and in that case what it is used for.

The toxicological assessment will help the users of the forensic chemical declaration. Non-doctors are usually not familiar with the substances detected. And very few people are able to assess the significance of the concentrations detected. The assessment is based on the ongoing collection of experience by the Section of Forensic Chemistry and on international reference collections.

Queries may be directed to Ingrid Rosendal, MSc in Pharmacy.