The rapid identification of frequently abused drugs.
D002623:Chemistry Techniques, Analytical; D002854:Chromatography, Paper; D002855:Chromatography, Thin Layer; D003460:Crystallization; D006801:Humans; D007259:Infrared Rays; D008722:Methods; D013053:Spectrophotometry; D019966:Substance-Related Disorders / Q000175:diagnosis*