Abstract
The extraction of illicit cocaine and heroin (diacetylmorphine) samples with 95% ethanol and subsequent analysis on pre-coated thin layers of silica gel (Merck) made the tentative identification of cocaine, heroin and some local anesthetics possible. Two detecting reagents were used, p-dimethylaminobenzaldehyde and acidic iodoplatinate. p-Dimethylaminobenzaldehyde was used for the detection of procaine, butacaine and benzocaine, acidic iodoplatinate for cocaine, heroin and some local anesthetics. The thin-layer chromatographically derived characteristics of cocaine, heroin, benzocaine, procaine, and lidocaine were unique, allowing for the relatively easy detection of these five compounds. The procedure is useful for the rapid screening of illicit cocaine and heroin samples for the presence or absence of the compounds listed. The unequivocal identity of these compounds is not established but the procedure does permit tentative identification.
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