Die acidimetrische Mikrobestimmung des Kaliums nach Fällung mit Tetraphenyloborat-Ion

Thermogravimetric Pyrolysis of Ammonium and Alkali Metal Tetraphenylborates

“…In the gravimetric determinations, the precipitates were usually dried at temperatures of 105°to 120°C. In a volumetric method for potassium the precipitate was ignited at "red heat" to potassium metaborate and then titrated with 0.1 A' hydrochloric acid (4). No definite temperature limits were given for the ignition.…”