DETERMINATION OF FLUORINE IN QUANTITATIVE ORGANIC MICROANALYSIS

Journal Article · Mon Sep 01 04:00:00 EDT 1958 · Analytical Chemistry (U.S.) Formerly Ind. Eng. Chem., Anal. Ed.

DOI:https://doi.org/10.1021/ac60141a035· OSTI ID:4310907

Ma, T S

Determination of fluorine in organic microanalysis has become increasingly important because of the large number and variety of organic fluoro compounds being synthesized. Because of its peculiar properties, conventional micromethods for halogen determinatlon are not applicable without modification. The principal steps in the determination of fluorine are: decomposition to convert organically bound fluorine to the fluoride ion from ions interfering in the subsequent step, and measurement of the fluoride ion. Methods of decomposition include catalytic oxidation, alkali metal or carbonate fusion, reduction with sodium biphenyl, and heating with concentrated sulfuric acid. Fluoride ion has been separated by the volatility of silicon tetrafluoride, steam distillation of fluorosllicic acid, or ion exchange resin. It has been determined gravimetrically as lead chlorofluoride, volumetrically with sodium hydroxide or thorium nitrate, colorimetrically with ammoninm molybdate, and potentiometrically with calcium ions. (auth)

• Research Organization: Brooklyn Coll. of New York City
• Sponsoring Organization: USDOE
• NSA Number: NSA-12-016246
• OSTI ID: 4310907
• 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: 30; ISSN ANCHA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ALKALI METALS
CARBONATES
CATALYSIS
CHEMISTRY
DECOMPOSITION
DISTILLATION
FLUORIDES
FLUORINE
HEATING
ION EXCHANGE MATERIALS
IONS
LEAD CHLORIDES
LEAD FLUORIDES
MELTING
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
OXIDATION
PHENYL RADICALS
PRECIPITATION
QUALITATIVE ANALYSIS
QUANTITATIVE ANALYSIS
REDUCTION
SEPARATION PROCESSES
SILICON FLUORIDES
SODIUM COMPOUNDS
STEAM
SULFURIC ACID
VOLATILITY
VOLUME
WEIGHT