title: TLC behaviour of quaternary ammonium halides on silica gel.
mesh_terms: D002855:Chromatography, Thin Layer / Q000379:methods; D000644:Quaternary Ammonium Compounds / Q000032:analysis*; D058428:Silica Gel; D012822:Silicon Dioxide
chemical_list: D000644:Quaternary Ammonium Compounds; D058428:Silica Gel; D012822:Silicon Dioxide