title: An improved field test for barbiturates and hydantoins with a modified cobalt (II) thiocyanate reagent.
mesh_terms: D001463:Barbiturates / Q000032:analysis*; D003035:Cobalt; D003124:Colorimetry; D006827:Hydantoins / Q000032:analysis*; D007202:Indicators and Reagents; D013861:Thiocyanates
chemical_list: D001463:Barbiturates; D006827:Hydantoins; D007202:Indicators and Reagents; D013861:Thiocyanates; D003035:Cobalt