Estudo do teste de Scott via técnicas espectroscópicas: um método alternativo para diferenciar cloridrato de cocaína e seus adulterantes

Química Nova

Vitor N. Conceição²  Lindamara M. Souza¹  Bianca B. Merlo¹  Paulo R. Filgueiras¹  Ronei J. Poppi¹  Wanderson Romão² 

[1] ,Instituto Federal do Espírito SantoVila Velha ES ,Brasil

关键词: colorimetric test;    cocaine;    ATR-FTIR;    PLS;   

DOI  :  10.5935/0100-4042.20140240

来源: SciELO

【 摘 要 】

Cocaine is usually seized mixed with a wide variety of adulterants such as benzocaine, lidocaine, caffeine, and procaine. The forensic identification of cocaine in these street drug mixtures is normally performed using colorimetric testing kits, but these tests may suffer from interferences, producing false-positive results. Here, we describe the use of analytical techniques including attenuated total reflection Fourier transform infrared (ATR-FTIR) and ultraviolet-visible (UV-VIS) spectroscopies to distinguish between cocaine and other adulterants (lidocaine, promethazine, powdered milk and yeast) that yield positive results on the Scott test using the thiocyanate cobalt reagent. A further 13 substances were also analyzed using the Scott test.

【 授权许可】

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