title: The potassium ion selective electrode as a tetraphenylborate sensor for quaternary ammonium salts analysis.
mesh_terms: D001896:Boron Compounds / Q000032:analysis*; D004566:Electrodes; D011188:Potassium / Q000032:analysis*; D011199:Potentiometry / Q000295:instrumentation; D000644:Quaternary Ammonium Compounds / Q000032:analysis*; D013775:Tetraphenylborate / Q000032:analysis*
chemical_list: D001896:Boron Compounds; D000644:Quaternary Ammonium Compounds; D013775:Tetraphenylborate; D011188:Potassium