SPECTROPHOTOMETRIC DETERMINATION OF FLUORIDE WITH THORIUM CHLORANILATE

Journal Article · Wed Jun 01 04:00:00 EDT 1960 · Analytical Chemistry (U.S.) Formerly Ind. Eng. Chem., Anal. Ed.

DOI:https://doi.org/10.1021/ac60163a028· OSTI ID:4156144

Hensley, A L; Barney, II, J E

A new spectrophotometric method for determining fluoride is based on the reaction with thorium chloranilate in aqueous methyl Cellosolve, buffered at pH 4.5. Sensitivity is varied by measuring absorbance at either 540 or 330 m mu , and by varying the amount of methyl Cellosolve in the solvent. The method has been tested by analyzing waters and catalysts. Most of the common anions do not interfere, and many of those that do can be removed with ion exchange resins. The new method is as sensitive as widely used colorimetric methods based on the bleaching of a complex by fluoride ion: in addition, a wide concentration range may be covered and frequent recalibration is not required. (auth)

• Research Organization: Standard Oil Co. of Indiana, Whiting
• Sponsoring Organization: USDOE
• NSA Number: NSA-14-015607
• OSTI ID: 4156144
• Journal Information: Analytical Chemistry (U.S.) Formerly Ind. Eng. Chem., Anal. Ed., Journal Name: Analytical Chemistry (U.S.) Formerly Ind. Eng. Chem., Anal. Ed. Vol. Vol: 32; ISSN ANCHA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

CATALYSIS
CHEMISTRY
CHLORANIL
CHLORANILIC ACID
COLOR
COMPLEXES
FLUORIDES
ION EXCHANGE
MEASURED VALUES
ORGANIC ACIDS
ORGANIC COMPOUNDS
PHOTOMETRY
QUANTITATIVE ANALYSIS
RESINS
SENSITIVITY
SPECTRA
THORIUM COMPOUNDS
USES
WATER