EXTRACTION AND FLAME PHOTOMETRIC DETERMINATION OF IRON

Journal Article · Thu Dec 01 04:00:00 EST 1960 · Analytical Chemistry (U.S.) Formerly Ind. Eng. Chem., Anal. Ed.

OSTI ID:4138759

Menis, O; Rains, T C

A flame photometric procedure for the determination of iron in a variety of materials including thorium, uranium, fluoride, and phosphate is described. The iron is extracted with 4-methyl-2-pentanone from a 6M hydrochloric acid medium, after which the emissivity of the iron in the organic phase is measured at a wave length of 372 m . The emissivity of iron atomic lines is 20 times greater in 4methyl-2-pentanone than in an aqueous medium, whereas that of FeO bands is increased approximately only tenfold. Iron can be quantitatively extracted with 4-methyl-2pentanone from 4 to 8M hydrochloric acid solutions with an equilibration period of 1 min. Emulsion formation can be prevented by control of speed and duration of shaking. Of 15 elements tested for interference, only chromium(VI). molybdenum, and tin interfere when they are present at concentrations greater than 150 times that of the iron. Solutions of 1M fluoride, phosphate, and sulfate do not interfere; but 0.1M solutions of nitrate or perchlorate interfere by quenching the emissivity of iron. The calibration curves sre linear for the concentrations within the range of l to 50 g/ml. The coefficient of variation of the method, depending on the material, ranges from 2 to 4%. (auth)

• Research Organization: Oak Ridge National Lab., Tenn.
• NSA Number: NSA-15-003988
• OSTI ID: 4138759
• 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

CHEMISTRY
CHROMIUM
COMBUSTION
CONTROL
EFFICIENCY
ELEMENTS
EMISSION
EMULSIONS
FLUORIDES
HYDROCHLORIC ACID
INTERFERENCE
IRON
IRON OXIDES
KETONES
MEASURED VALUES
METHYL RADICALS
MOLYBDENUM
NITRATES
ORGANIC COMPOUNDS
PENTANE
PERCHLORIC ACID
PHOSPHATES
PHOTOMETRY
QUANTITATIVE ANALYSIS
SOLUTIONS
SULFATES
TESTING
THORIUM
TIN
URANIUM
VELOCITY