Determination of fluorine in quantitative organic microanalysis

Conference · Mon Sep 01 04:00:00 EDT 1958 · Anal. Chem.; (United States)

OSTI ID:5977152

Ma, T S

Determination of fluorine in organic microanalysis has become increasingly important because of the large number and variety of organic fluorocompounds being synthesized. Because of its peculiar properties, conventional micromethods for halogen determination are not applicable without modification. The principal steps in the determination of fluorine are: decomposition to convert organically bound fluorine to the fluoride ion, separation of 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 byphenyl, and heating concentrated sulfuric acid. Fluoride ion has been separated by the volatility of silicon tetrafluoride, steam distillation of fluorosilicic acid, or ion exchange resin. It has been determined gravimetrically as lead chlorofluoride, volumetrically with sodium hydroxide or thorium nitrate, colorimetrically with ammonium molybdate, and potentiometrically with calcium ions. 49 references.

• Research Organization: Brooklyn College of New York City, NY
• OSTI ID: 5977152
• Conference Information: Journal Name: Anal. Chem.; (United States) Journal Volume: 30:9
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102* -- Chemical & Spectral Procedures
400104 -- Spectral Procedures-- (-1987)
ABSORPTION SPECTROSCOPY
ACTINIDE COMPOUNDS
ALKALI METAL COMPOUNDS
ALKALI METALS
ALKALINE EARTH METAL COMPOUNDS
AMMONIUM COMPOUNDS
AROMATICS
BIPHENYL
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATES
CATALYSTS
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
DECOMPOSITION
DISTILLATION
ELEMENTS
EVAPORATION
FLUORIDES
FLUORINE COMPOUNDS
GRAVIMETRIC ANALYSIS
HALIDES
HALOGEN COMPOUNDS
HEATING
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROXIDES
INORGANIC ACIDS
ION EXCHANGE MATERIALS
LEAD COMPOUNDS
LEAD HALIDES
MATERIALS
MELTING
METALS
MICROANALYSIS
MOLYBDATES
MOLYBDENUM COMPOUNDS
NITRATES
NITROGEN COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
OXIDATION
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
POTENTIOMETRY
QUANTITATIVE CHEMICAL ANALYSIS
REDUCTION
REFRACTORY METAL COMPOUNDS
SEPARATION PROCESSES
SILICIC ACID
SILICON COMPOUNDS
SILICON FLUORIDES
SODIUM COMPOUNDS
SODIUM HYDROXIDES
SPECTROSCOPY
STEAM
SULFURIC ACID
THORIUM COMPOUNDS
THORIUM NITRATES
TITRATION
TRANSITION ELEMENT COMPOUNDS
VOLUMETRIC ANALYSIS