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Rapid Method for Sodium Hydroxide Fusion of Limestone Matrices Prior to Americium, Plutonium, Strontium, Radium, and Uranium Analyses for Environmental Remediation Following Radiological Incidents (pdf) (August 2018, 402-R-18-002)
Category: I. METHODS |
americium
plutonium
strontium
radium
uranium
fusion
limestone
environmental
muffle furnace
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Rapid Method for Sodium Carbonate Fusion of Soil and Soil-Related Matrices Prior to Strontium-90 Analyses for Environmental Remediation Following Radiological Incidents (pdf) (August 2012, 600-R-12-640)
Category: I. METHODS |
Strontium-90
fusion
soil
environmental
muffle furnace
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Rapid Method for Sodium Carbonate Fusion of Glass-Fiber and Organic/Polymeric Composition Filters and Swipes Prior to Isotopic Uranium, Plutonium, Americium, Strontium, and Radium Analyses for Environmental Remediation Following Homeland Security Events (pdf) (October 2012, 402-R-12-008)
Category: I. METHODS |
Uranium
Plutonium
Americium
Strontium
Radium
fusion
filters
environmental
Fisher blast burner or Meeker burner
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Rapid Method for Fusion of Soil and Soil-Related Matrices Prior to Americium, Plutonium, and Uranium Analyses for Environmental Remediation Following Radiological Incidents (pdf) (August 2012, 600-R-12-636/7/8)
Category: I. METHODS |
Radium
fusion
soil
environmental
alpha spectrometry
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Rapid Method for Sodium Hydroxide/Sodium Peroxide Fusion of Radioisotope Thermoelectric Generator Materials in Water and Air Filter Matrices Prior to Plutonium Analyses for Environmental Remediation Following Radiological Incidents (pdf) (April 2014, 402-R14-003)
Category: I. METHODS |
Plutonium-238
Radioisotope Thermoelectric Generator
fusion
water
air filters
environmental
alpha spectrometry
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Rapid Radiochemical Method for Plutonium-238 and Plutonium-239/240 in Building Materials for Environmental Remediation Following Radiological Incidents (pdf) (April 2014, 402-R-14-006)
Category: I. METHODS |
Plutonium-238
plutonium-239/240
fusion
building materials
environmental
alpha spectrometry
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Rapid Method for Sodium Hydroxide Fusion of Concrete and Brick Matrices Prior to Americium, Plutonium, Strontium, Radium, and Uranium Analyses for Environmental Remediation Following Radiological Incidents (pdf) (April 2014, 402-R-14-004)
Category: I. METHODS |
americium
plutonium
strontium
radium
uranium
fusion
concrete
brick
environmental
muffle furnace
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Rapid Method for Sodium Hydroxide Fusion of Asphalt Matrices Prior to Americium, Plutonium, Strontium, Radium, and Uranium Analyses (pdf) (May 2017, EPA 402-R-16-001)
Category: I. METHODS |
americium
plutonium
strontium
radium
uranium
fusion
Asphalt
environmental
muffle furnace
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Rapid Method for Sodium Hydroxide Fusion of Asphalt Roofing Material Matrices Prior to Americium, Plutonium, Strontium, Radium, and Uranium Analyses (pdf) (May 2017, EPA 402-R-16-003)
Category: I. METHODS |
americium
plutonium
strontium
radium
uranium
fusion
Asphalt roofing
environmental
muffle furnace
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Rapid Method for Radium in Soil Incorporating the Fusion of Soil and Soil-Related Matrices with the Radioanalytical Counting Method for Environmental Remediation Following Radiological Incidents (pdf) (August 2012, 600-R-12-635)
Category: I. METHODS |
Radium
Fusion
Soil
Environmental
Alpha Spectrometry
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Determination of Actinides in Nuclear Wastes and Reference Materials for Ores and Mill Tailings, Claude W. Sill and David S. Sill, Waste Management, Vol 9, Issue 4, pp 219-229, 1989
(A fee may be required to access this article.) Samples of siliceous solids up to 1 g were dissolved completely by successive fusions with potassium fluoride and pyrosulfate in platinum dishes in the presence of appropriate tracers. Samples which contaminate or react deleteriously with platinum were treated extensively with hydrofluoric and perchloric acids before fusion with pyrosulfate in glass. The pyrosulfate cake was dissolved in dilute hydrochloric acid and the actinides were precipitated isomorphously with barium sulfate. The barium sulfate was dissolved in alkaline ethylenediaminetetraacetic acid (EDTA), and the actinides were precipitated as the hydroxides, filtered on a membrane filter and analyzed in an alpha spectrometer. When necessary, the hydroxides were converted to fluorides in the presence of various oxidizing agents to obtain improved resolution and additional separations. Isotopes of all elements from thorium through curium can be determined in one sequential procedure. The procedure was simpler and faster than others available, with higher yields and greater reliability. Resolution of the subsequent alpha spectra was comparable to that obtained by electrodeposition. The results were reproduced with a relative standard deviation of 1 to 2%. The accuracy of the determination on standards was generally as good as the statistical uncertainty of the measurement permits. Some results of actinides in pond sediments, incinerator ash, baghouse dusts, and ion exchange resins are given.
Category: I. METHODS |
Pyrosulfate fusion
alpha spectrometer
actinides
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Sample Dissolution, Claude W. Sill and David S. Sill, Radioactivity & Radiochemistry, Vol. 6, No 2, 1995 pages 8-14
Extensive experimental evidence indicates that variable and incomplete sample dissolution is one of the major causes of the inaccurate results being obtained widely in radiochemical analysis. This conclusion is easily demonstrated by analysis of the residues remaining after the sample has been leached. The residue often contains a significant fraction of the radionuclide being determined. Three procedures involving high-temperature fusions are recommended that ensure complete dissolution of virtually all types of inorganic samples routinely and reliably. With a few unique exceptions encountered over many years of constant use, dissolution of the entire matrix has been so complete that a Tyndall beam could not be observed when the solution of the final fusion cake was examined with a flashlight in a darkened room. Complete material balance studies using radioactive tracers have also shown no significant losses of even the large terand quadrivalent radionuclides that could be attributed to incomplete dissolution of high specific-activity particles of the most refractory and intractable species. The recommended fusion procedures are no more hazardous, time-consuming or difficult than other procedures giving much less complete or reliable dissolution.
Category: I. METHODS |
Fusion
complete dissolution
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