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. Author manuscript; available in PMC: 2020 Nov 1.
Published in final edited form as: Forensic Sci Int. 2019 Sep 13;304:109939. doi: 10.1016/j.forsciint.2019.109939

Fig. 4.

Fig. 4.

Example of how the residue on the inner packaging could be used for intelligence purposes. Both spectra (A. and B.) are wipes of inner packages that came from a location where other seizures recovered carfentanil. Compounds in green are those that were found on the packaging, but not in the extract.