[Potentiometric titration of potassium and of some organic nitrogen-containing drugs with sodium tetraphenylboron].
D009584:Nitrogen / Q000737:chemistry*; D011188:Potassium / Q000737:chemistry*; D012964:Sodium; D013775:Tetraphenylborate
D013775:Tetraphenylborate; D012964:Sodium; D009584:Nitrogen; D011188:Potassium
NITROGEN/chemistry; POTASSIUM/chemistry