A police officer stood a motorist who is driving erratically and noticed a bag of white powder on the front seat of the car that he suspect contains heroin. Name one screening test that you might perform to determine the presence of heroin. Assuming the powder tests positive for heroin, what should you do next?
Added by Ashley B.
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The reagent used in this test will change the color to deep purple and eventually turn black if heroin is present. Show more…
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