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Origin identification of homemade pepper spray by multivariate data analysis of chemical attribution signatures
Umeå University, Faculty of Science and Technology, Department of Chemistry.
2019 (English)In: Forensic Science International, ISSN 0379-0738, E-ISSN 1872-6283, Vol. 304, article id 109956Article in journal (Refereed) Published
Abstract [en]

Riot control agents such as pepper sprays can be misused for antagonistic and criminal purposes. Several web-pages and YouTube videos are available describing how to make homemade pepper spray. In this study, we investigated whether it was possible to identify the origin of homemade pepper sprays based on chemical attribution signatures from thirteen different types of chili acquired from six different vendors analyzed by GC-MS. The results showed that it was possible to differentiate chili based on species, chili type and vendor using OPLS-DA. Application of an external test set of chilies acquired and extracted one year later than development of the models resulted in correct classification in all models. The models displayed high predictability, suggesting their use for prediction of the identity and origin of seized homemade pepper sprays. 

Place, publisher, year, edition, pages
Elsevier, 2019. Vol. 304, article id 109956
Keywords [en]
Chemical forensics, Homemade pepper spray, Chemical attribution signatures, Multivariate data analysis
National Category
Agricultural Science
Identifiers
URN: urn:nbn:se:umu:diva-166482DOI: 10.1016/j.forsciint.2019.109956ISI: 000496970600018PubMedID: 31568951OAI: oai:DiVA.org:umu-166482DiVA, id: diva2:1382088
Funder
Swedish Armed ForcesAvailable from: 2020-01-02 Created: 2020-01-02 Last updated: 2020-01-02Bibliographically approved

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