What are thehemical reactions in Fentanyl "field tests" given by police officers?

Daniel B Rego @Daniel-Rego

03 September 2018 0 8K Report

Police often have "field tests" to identify the presence, qualitatively, of illegal substances, such as fentanyl.

Does anyone know what the "field test" kits for fentanyl are specifically chemically testing for?

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