Rapid spectrophotometric determination of technetium in uranium materials

Journal Article · Sun Apr 01 04:00:00 EST 1962 · Analytical Chemistry (U.S.) Formerly Ind. Eng. Chem., Anal. Ed.

DOI:https://doi.org/10.1021/ac60184a025· OSTI ID:4800359

Howard, O H; Weber, C W

Technetium, 0.3 to 30 μ g in a 3N acid solution, is determined in the presence of up to 5 grams of uranium, within 15 minutes, with 95% confidence limits of plus or minus 0.07 μ g at 0.5 μg of technetium, and plus or minus 0.2 μ g at 30 μ g of technetium. The technetium is reduced from Tc(VII) to Tc(V) with ascorbic acid in the presence of iron(III) which prevents reduction below Tc(V). The red technetium(V) thiocyanate complex is formed and extracted into butyl acetate; coextracted ferric thiocyanate is removed with a phosphate wash. The absorbance of the technetium extract is measured at 585 m μ (molar absorptivity 16500) in the presence of molybdenum, or at 510 m μ (molar absorptivity 50000) in the absence of molybdenum. The amount of technetium is obtained from a Beer's law calibration curve. Molybdenum is the only known direct interference ---100 μg appearing as 0.4 μ g of technetium when the absorbance is measured at 585 m μ . (auth)

• Research Organization: Oak Ridge Gaseous Diffusion Plant, Tenn.
• NSA Number: NSA-16-012967
• OSTI ID: 4800359
• 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: 34; ISSN ANCHA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ACETATES
ASCORBIC ACID
BUTYL RADICALS
CYANIDES
DIAGRAMS
ERRORS
INTERFERING ELEMENTS
IRON COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PHOTOMETRY
QUANTITATIVE ANALYSIS
REDUCTION
SOLVENT EXTRACTION
SPECTROSCOPY
STANDARDS
TECHNETIUM
TECHNETIUM COMPLEXES
TECHNETIUM COMPOUNDS
URANIUM COMPOUNDS
VITAMINS