Preparation of acid standards for and determination of free acid in concentrated plutonium-uranium solutions

Journal Article · Tue Jan 01 00:00:00 EST 1985 · Analytical Chemistry

DOI:https://doi.org/10.1021/ac00284a055· OSTI ID:5031395

Ryan, J. L. ^[1]; Bryan, G. H. ^[1]; Burt, M. C. ^[1]; Costanzo, D. A. ^[1]

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1. Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)

Standard nitric acid solutions containing up to 400 g/L plutonium and/or uranium were prepared, and these provide a way of rigorously testing methods for the determination of free acid in concentrated plutonium solutions. These standard solutions were prepared from uranyl nitrate hexahydrate and crystalline plutonium (IV) nitrate which was in turn obtained by vacuum evaporation of nitric acid solutions of Pu (IV). Three methods of free acid determination in plutonium solutions were tested, and the widely accepted iodate precipitation methods was shown to give markedly erroneous results at high plutonium concentrations. An improved oxalate complexing procedure was developed which gives accurate results (bias less than the standard deviation of 0.02 M) up to at least 400 g/L plutonium.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA), Nuclear Criticality Safety Program (NCSP)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5031395
• Report Number(s): ANCHA, 57:1423-1427; TRN: 85-025065
• Journal Information: Analytical Chemistry, Vol. 57, Issue 7; ISSN 0003-2700
• Publisher: American Chemical Society (ACS)
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
PLUTONIUM
COMPLEXOMETRY
PRECIPITATION
PLUTONIUM NITRATES
QUANTITATIVE CHEMICAL ANALYSIS
URANIUM
URANYL NITRATES
EXPERIMENTAL DATA
FLUORIDES
IODATES
NITRIC ACID
OXALATES
STANDARDS
ACTINIDE COMPOUNDS
ACTINIDES
CARBOXYLIC ACID SALTS
CHEMICAL ANALYSIS
DATA
ELEMENTS
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC ACIDS
IODINE COMPOUNDS
METALS
NITRATES
NITROGEN COMPOUNDS
NUMERICAL DATA
OXYGEN COMPOUNDS
PLUTONIUM COMPOUNDS
SEPARATION PROCESSES
TRANSURANIUM COMPOUNDS
TRANSURANIUM ELEMENTS
URANIUM COMPOUNDS
URANYL COMPOUNDS
Nuclear Criticality Safety Program (NCSP)
Plutonium
Complexometry
Precipitation
Plutonium Nitrates
Quantitative Chemical Analysis
Uranium
Uranyl Nitrates
Experimental Data
Fluorides
Iodates
Nitric Acid
Oxalates
Standards
Actinide Compounds
Actinides
Carboxylic Acid Salts
Chemical Analysis
Data
Elements
Fluorine Compounds
Halides
Halogen Compounds
Hydrogen Compounds
Information
Inorganic Acids
Iodine Compounds
Metals
Nitrates
Nitrogen Compounds
Numerical Data
Oxygen Compounds
Plutonium Compounds
Separation Processes
Transuranium Compounds
Transuranium Elements
Uranium Compounds
Uranyl Compounds
400102* - Chemical & Spectral Procedures
400702 - Radiochemistry & Nuclear Chemistry- Properties of Radioactive Materials