Determination of free acid by standard addition method in potassium thiocyanate

Technical Report · Tue Jun 01 00:00:00 EDT 1982

DOI:https://doi.org/10.2172/5195650· OSTI ID:5195650

Baumann, E W

The free acid content of solutions containing hydrolyzable ions has been determined potentiometrically by a standard addition method. Two increments of acid are added to the sample in 1M potassium thiocyanate solution. The sample concentration is calculated by solution of three simultaneous Nernst equations. The method has been demonstrated for solutions containing Al/sup 3 +/, Cr/sup 3 +/, Fe/sup 3 +/, Hg/sup 2 +/, Ni/sup 2 +/, Th/sup 4 +/, or UO/sub 2//sup 2 +/ with a metal-to-acid ratio of < 2.5. The method is suitable for determination of 10 ..mu..moles acid in 10 mL total volume. The accuracy can be judged from the agreement of the Nernst slopes found in the presence and absence of hydrolyzable ions. The relative standard deviation is < 2.5%. The report includes a survey of experiments with thermometric, pH, and Gran plot titrations in a variety of complexants, from which the method was evolved. Also included is a literature survey of sixty references, a discussion of the basic measurements, and a complete analytical procedure.

• Research Organization: Du Pont de Nemours (E.I.) and Co., Aiken, SC (United States). Savannah River Lab.
• DOE Contract Number: AC09-76SR00001
• OSTI ID: 5195650
• Report Number(s): DP-1632; ON: DE82017563; TRN: 82-013581
• Resource Relation: Other Information: Portions of document are illegible
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
NITRIC ACID
POTENTIOMETRY
ACCURACY
ALUMINIUM NITRATES
CHROMIUM NITRATES
EXPERIMENTAL DATA
HYDROLYSIS
INTERFERING ELEMENTS
IRON NITRATES
MERCURY NITRATES
NICKEL NITRATES
POTASSIUM COMPOUNDS
QUANTITATIVE CHEMICAL ANALYSIS
REVIEWS
THIOCYANATES
THORIUM NITRATES
URANYL NITRATES
ACTINIDE COMPOUNDS
ALKALI METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ANTITHYROID DRUGS
CARBONIC ACID DERIVATIVES
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
CHROMIUM COMPOUNDS
DATA
DECOMPOSITION
DOCUMENT TYPES
DRUGS
HORMONE ANTAGONISTS
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC ACIDS
IRON COMPOUNDS
LYSIS
MERCURY COMPOUNDS
NICKEL COMPOUNDS
NITRATES
NITROGEN COMPOUNDS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXYGEN COMPOUNDS
SOLVOLYSIS
THORIUM COMPOUNDS
TITRATION
TRANSITION ELEMENT COMPOUNDS
URANIUM COMPOUNDS
URANYL COMPOUNDS
400102* - Chemical &amp; Spectral Procedures
050800 - Nuclear Fuels- Spent Fuels Reprocessing