EXHIBIT C Where Drugs Are Hidden

Source U.S. Drug Enforcement Administration, Drug Irttelligence Bri Common Vdti-cle Concealment fi hods in the United States, 2003. 

Analytical Approach Heroin samples follow the typical flowchart approach from presumptive tests to confirmation by instrument, usually by GCMS, since the presence of other alkaloids makes it difficult to purify the sample sufficiently for IR. Thin-layer chromatography can be particularly useful in separating components of a complex heroin sample and, coupled with the appropriate standards and developers, can assist in identification of specific compounds. Marquis and Dragendorff reagents are commonly used for the purpose. 

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