Complexometric Determination of Fluoride with Cerium(III)

Complexometric Determination of Fluoride with Cerium(III)

A volumetric method is presented for the determination of fluoride in inorganic samples containing high levels of metal ions as well as the anions nitrate, chloride, and perchlorate After preliminary separation of the fluoride bv pyrolysis, cerous fluoride is precipitated stoichiometrically at pH 1....

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Veröffentlicht in:Analytical chemistry (Washington) 1961-11, Vol.33 (12), p.1655-1657
Hauptverfasser: Yamamura, S. S, Kussy, M. E, Rein, J. E
Format: Artikel
Sprache:eng
Schlagworte:
ACIDITY
ARSENIC COMPOUNDS
BORATES
CERIUM COMPLEXES
CERIUM FLUORIDES
CHEMISTRY
CHLORIDES
COMBUSTION
DYES
EDTA
FLUORIDES
IMPURITIES
IONS
MEASURED VALUES
METALS
NITRATES
ORGANIC NITROGEN COMPOUNDS
PERCHLORIC ACID
PRECIPITATION
QUALITATIVE ANALYSIS
QUANTITATIVE ANALYSIS
SALTS
SAMPLING
SEPARATION PROCESSES
SULFATES
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Beschreibung
Zusammenfassung:A volumetric method is presented for the determination of fluoride in inorganic samples containing high levels of metal ions as well as the anions nitrate, chloride, and perchlorate After preliminary separation of the fluoride bv pyrolysis, cerous fluoride is precipitated stoichiometrically at pH 1.75 with a measured excess of cerium(IfI), and the excess cerium is back-titrated with EDTA to an arseneazocresol red end point. Sulfate and large amounts of borate interfere.
ISSN:0003-2700
1520-6882
DOI:10.1021/ac60180a014