title: An improved test for cocaine, methaqualone an methadone with a modified cobalt (II) thiocyanate reagent.
mesh_terms: D003035:Cobalt; D003042:Cocaine / Q000032:analysis*; D006801:Humans; D007202:Indicators and Reagents; D008691:Methadone / Q000032:analysis*; D008702:Methaqualone / Q000032:analysis*; D008722:Methods; D019966:Substance-Related Disorders; D013861:Thiocyanates
chemical_list: D007202:Indicators and Reagents; D013861:Thiocyanates; D003035:Cobalt; D008702:Methaqualone; D003042:Cocaine; D008691:Methadone