Abstract
A new spray reagent, a 1% ( w/v ) aqueous solution of ferric chloride and a 1% ( w/v ) acidified alcoholic solution of 2,2′-dipyridyl has been developed for detection and identification of heroin (diacetylmorphine). A red spot is observed for heroin when the HPTLC plate is sprayed with the reagent and heated at 100°C. Similar spots are observed for morphine, codeine, and thebaine (opiates containing the phenanthrene nucleus). It did not, however, react with papavarine and narcotine (opiates containing the isoquinoline nucleus). The reagent is specific, sensitive, and can be used for the detection and identification of heroin in forensic samples.
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