PAUL RAPSON / SCIENCE PHOTO LIBRARY PAUL RAPSON / SCIENCE PHOTO LIBRARY
Forensic drug analysis. Forensics officer performing a marquis reagent test to identify drug substances such as opiates, amphetamine and ecstasy (MDMA). The test contains a mixture of formaldehyde and concentrated sulphuric acid, which is dripped onto the substance being tested. Different compounds produce different colour reactions.
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