title: Selective determinations of amines and quaternary ammonium compounds as ion pairs with methyl orange by an automated method applicable to single dose analysis.
mesh_terms: D000588:Amines / Q000032:analysis* / Q000302:isolation & purification; D001322:Autoanalysis; D004396:Coloring Agents; D008722:Methods; D010783:Photometry; D011398:Promethazine / Q000037:antagonists & inhibitors; D000644:Quaternary Ammonium Compounds / Q000032:analysis* / Q000302:isolation & purification
chemical_list: D000588:Amines; D004396:Coloring Agents; D000644:Quaternary Ammonium Compounds; D011398:Promethazine