title: Determination of tetramethylammonium ion in shellfish by ion chromatography.
mesh_terms: D000818:Animals; D002794:Choline / Q000032:analysis; D002852:Chromatography, Ion Exchange / Q000379:methods; D000644:Quaternary Ammonium Compounds / Q000032:analysis*; D012469:Salivary Glands / Q000032:analysis; D012758:Shellfish / Q000032:analysis*
chemical_list: D000644:Quaternary Ammonium Compounds; C027917:tetramethylammonium; D002794:Choline