DETERMINATION OF FLUORIDE BY CONDUCTO-METRIC TITRATION

Journal Article · Sun Feb 01 04:00:00 EST 1959 · Analytical Chemistry (U.S.) Formerly Ind. Eng. Chem., Anal. Ed.

OSTI ID:4280480

Kubota, H; Surak, J G

The reaction between fluoride and lanthanum ions is utilized for a volumetric semimicrodetermination of fluoride in which the end point is located by changes in the conductivity of the reaction medium. Milligram quantities of fluoride in solution can be determined with good accuracy and precision, if the total amount of extraneous ions is small. The titration is best applied to the analysis of distillates of the Willard-Winter sepa this com~rd and psendobroohite was verified by ration. Relative standard deviation of 0.15% has been obtained in titratlng aliquots from a single distillation. A modified distillation apparatus which is simple to construct and permits rapid interchange of distilling flasks, makes possible separation of fluoride from a medium whose acid concentration is maintained high and nearly constant, to promote the efficiency of the distillation. A relative standard deviation of 1.8% for the distillation and titration was obtained from replicate determinations of 1-ml aliquots of a standard fluoride solution containing about 5 mg of fluoride. (auth)

• Research Organization: Oak Ridge National Lab., Tenn.
• NSA Number: NSA-13-008674
• OSTI ID: 4280480
• 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: 31; ISSN ANCHA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ACIDITY
ANIONS
CATIONS
CHEMICAL REACTIONS
CHEMISTRY
DISTILLATION
ELECTRIC CONDUCTIVITY
ENRICHMENT
ERRORS
EXTRACTION COLUMNS
FLUORIDES
LANTHANUM COMPOUNDS
OPERATION
PERFORMANCE
QUANTITATIVE ANALYSIS
SEPARATION PROCESSES
SOLUTIONS
TITRATION
TRACE AMOUNTS
VARIATIONS
WATER