(Received 7 September 1993; accepted 30 September 1994)
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A gas chromatographic method for determining norcocaine concentration in cocaine powder is presented. The lower detection limit was 0.01%. GC/MS was used to confirm the presence of norcocaine. Norcocaine concentrations in 170 of 198 illicit cocaine samples tested ranged from 0.01% to 3.70%, with an average of 0.54%. Norcocaine was not detected in 28 of the 198 samples.
Forensic Chemist, Drug Enforcement Administration, Southeast Laboratory, Miami, FL
Forensic Chemist, Roanoke Crime Laboratory, Roanoke, VA
Stock #: JFS13805J