Crime Scene Novichok—Optical Detection of Fourth-Generation Agents (FGAs) Using Handheld Forensic Light Sources

Novichok-like or fourth-generation agents (FGAs) are chemical warfare (CWAs) which have been gaining attention since their use in assassination attempts on Sergei Skripal and Alexei Navalny. Due to physicochemical properties, these substances difficult detect by implemented technologies, resulting massive response efforts if occurrence is suspected a civilian environment. In this work, an approach presented that uses handheld forensic light sources visually surfaces contaminated with Novichok. More than 100 different wavelength combinations were applied seven chosen represent the newly listed schedule 1 subgroups Annex Chemicals of Chemical Weapons Convention. One waveband was identified as promising, allowed optical detection all tested substances. Several surfaces, could be affected case possible attack using novichok-like nerve agents, also successfully evaluated. The proposed procedure for CBRN responders security agencies significantly reduce efforts, thereby diminishing overall threat posed group chemicals (FGAs). This extended carbamates CWAs.