Determination of Hexafluorophosphate by Amperometric Titration with Tetraphenylarsonium Chloride.

Gravimetric Determination of Hexafluorophosphate as Tetraphenylarsonium Hexafluorophosphate.

“…Solution 3 was analyzed gravimetrically with Nitron and amperometrically with tetraphenylarsonium chloride. The Nitron and amperometric procedures used were described earlier (1). A comparison of the results obtained with the three methods is made in Table III.…”

“…Potassium hexafluorophosphate, sodium monofluorophosphate, and difluorophosphic acid were donated by the Ozark-Mahoning Co., Tulsa, Okla. The potassium hexafluorophosphate was recrystallized by a procedure described previously (1).…”

Liquid-liquid extraction of cadmium with high-molecular-weight amines from iodine solutions

“…Nitron (1), tetraphenylarsonium (2, 3), -phosphonium, and -stibonium chlorides, methylene blue (4), and tetran-pentylammonium bromide ( 5) have all been used as precipitants for gravimetric or volumetric determinations of various anions. More specifically, nitron and tetraphenylarsonium chloride have been used to determine tetrafluoroborate (6, 7), perchlorate (8,9), and hexafluorophosphate (10,11) gravimetrically and volumetrically, and tetraphenylarsonium, -phosphonium, and -stibonium chlorides have been used for the volumetric determination of chloro complexes of mercury, tin, cadmium, and zinc (12, 13).…”