QUALITATIVE ANALYSIS OF CONFISCATED ILLEGAL DRUGS BY THIN-LAYER CHROMATOGRAPHY.
MIHAELA GHEORGHE, DAN BĂLĂLĂU, MIHAELA ILIE, DANIELA LUIZA BACONI, ANNE-MARIE CIOBANU
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Abstract:

Criminalistic investigation often has as a task the identification of the compounds from confiscated materials (powders, tablets, etc.). Sometimes the speed and flexibility of the method choosed for the purpose are crucial.
A simple, yet robust analytical method for the identification of organic compounds from mixtures is the thin-layer chromatography (TLC).
The paper presents a TLC method for the separation and identification of caffeine, codeine and phenobarbital from mixtures, using silicagel F254 precoated glass plates as a stationary phase. Best results for the separation were obtained using the solvent mixture ethyl acetate : methanol : ammonia (85:10:5).
Two components out of three unknown confiscated drug samples could be identified in these conditions.

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