Recovery of drugs from old paper chromatograms.
D001463:Barbiturates / Q000032:analysis / Q000097:blood; D002110:Caffeine / Q000032:analysis / Q000097:blood; D002854:Chromatography, Paper; D004356:Drug Storage; D005554:Forensic Medicine; D006801:Humans; D008099:Liver / Q000032:analysis
D001463:Barbiturates; D002110:Caffeine