PART I. EXTRACTION OF URANIUM, THORIUM, HAFNIUM AND THE ALKALINE EARTH ELEMENTS WITH BIS(DI-n-HEXYLPHOSPHINYL) METHANE FROM PERCHLORIC ACID SOLUTIONS. PART II. SIMULTANEOUS SPECTROPHOTOMETRICDETERMINATION OF TRACE AMOUNTS OF CALCIUM AND MAGNESIUM WITH CHLOROPHOSPHONAZO III

Title: PART I. EXTRACTION OF URANIUM, THORIUM, HAFNIUM AND THE ALKALINE EARTH ELEMENTS WITH BIS(DI-n-HEXYLPHOSPHINYL) METHANE FROM PERCHLORIC ACID SOLUTIONS. PART II. SIMULTANEOUS SPECTROPHOTOMETRICDETERMINATION OF TRACE AMOUNTS OF CALCIUM AND MAGNESIUM WITH CHLOROPHOSPHONAZO III

Full Record
Other Related Research

Abstract

The extraction of hafnium, thorium, uranium, magnesium, calcium, barium, and strontium with HDPM in 1,2-dichlorobenzene from perchloric acid solutions in a three to one molar ratio of HDPM to metal ion was studied. Most of the hafnium formed a precipitate between the phases. Thorium was nearly quantitatively extracted from all concentrations of perchloric acid. Uranium was quantitatively extracted from all concentrations of perchloric acid. The alkaline earth elements were not well extracted from any concentration of perchloric acid. The extraction of calcium was increased by using sodium perchlorate solutions rather than perchloric acid solutions. A rapid and sensitive spectrophotometric procedure for determining calcium and magnesium with Chlorophosphonazo III is described. Either calcium or magnesium may be determined at pH 7.0 in the range of 0.1 mu g per 25 ml (0.004 ppm) to 10 mu g per 25 ml (0.4 ppm). In mixtures of calcium and magnesium, calcium is determined at pH 2.2 at a wave length of 667.5 m mu . The magnesium is then determined by difference at pH 7.0 and 669 m mu where the absorbances of the two metal complexes are additive. Milligram amounts of the alkali metals can be tolerated, but most other metals interfere.more » (auth)« less

Authors:: Ferguson, J W; Banks, C

Publication Date:: 1963-11-01

Research Org.:: Ames Lab., Ames, Iowa

OSTI Identifier:: 4070814

Report Number(s):: IS-777

NSA Number:: NSA-18-009970

DOE Contract Number:: W-7405-ENG-82

Resource Type:: Technical Report

Resource Relation:: Other Information: Orig. Receipt Date: 31-DEC-64

Country of Publication:: United States

Language:: English

Subject:: CHEMISTRY

Citation Formats


                    Ferguson, J W, and Banks, C. PART I. EXTRACTION OF URANIUM, THORIUM, HAFNIUM AND THE ALKALINE EARTH ELEMENTS WITH BIS(DI-n-HEXYLPHOSPHINYL) METHANE FROM PERCHLORIC ACID SOLUTIONS. PART II. SIMULTANEOUS SPECTROPHOTOMETRICDETERMINATION OF TRACE AMOUNTS OF CALCIUM AND MAGNESIUM WITH CHLOROPHOSPHONAZO III.  United States: N. p., 1963. 
        Web.

Copy to clipboard


                    Ferguson, J W, & Banks, C. PART I. EXTRACTION OF URANIUM, THORIUM, HAFNIUM AND THE ALKALINE EARTH ELEMENTS WITH BIS(DI-n-HEXYLPHOSPHINYL) METHANE FROM PERCHLORIC ACID SOLUTIONS. PART II. SIMULTANEOUS SPECTROPHOTOMETRICDETERMINATION OF TRACE AMOUNTS OF CALCIUM AND MAGNESIUM WITH CHLOROPHOSPHONAZO III.  United States.

Copy to clipboard


                    Ferguson, J W, and Banks, C. Fri .  
        "PART I. EXTRACTION OF URANIUM, THORIUM, HAFNIUM AND THE ALKALINE EARTH ELEMENTS WITH BIS(DI-n-HEXYLPHOSPHINYL) METHANE FROM PERCHLORIC ACID SOLUTIONS. PART II. SIMULTANEOUS SPECTROPHOTOMETRICDETERMINATION OF TRACE AMOUNTS OF CALCIUM AND MAGNESIUM WITH CHLOROPHOSPHONAZO III".  United States.

Copy to clipboard


                    
@article{osti_4070814,

  title        = {PART I. EXTRACTION OF URANIUM, THORIUM, HAFNIUM AND THE ALKALINE EARTH ELEMENTS WITH BIS(DI-n-HEXYLPHOSPHINYL) METHANE FROM PERCHLORIC ACID SOLUTIONS. PART II. SIMULTANEOUS SPECTROPHOTOMETRICDETERMINATION OF TRACE AMOUNTS OF CALCIUM AND MAGNESIUM WITH CHLOROPHOSPHONAZO III},

  author       = {Ferguson, J W and Banks, C},

  abstractNote = {The extraction of hafnium, thorium, uranium, magnesium, calcium, barium, and strontium with HDPM in 1,2-dichlorobenzene from perchloric acid solutions in a three to one molar ratio of HDPM to metal ion was studied. Most of the hafnium formed a precipitate between the phases. Thorium was nearly quantitatively extracted from all concentrations of perchloric acid. Uranium was quantitatively extracted from all concentrations of perchloric acid. The alkaline earth elements were not well extracted from any concentration of perchloric acid. The extraction of calcium was increased by using sodium perchlorate solutions rather than perchloric acid solutions. A rapid and sensitive spectrophotometric procedure for determining calcium and magnesium with Chlorophosphonazo III is described. Either calcium or magnesium may be determined at pH 7.0 in the range of 0.1 mu g per 25 ml (0.004 ppm) to 10 mu g per 25 ml (0.4 ppm). In mixtures of calcium and magnesium, calcium is determined at pH 2.2 at a wave length of 667.5 m mu . The magnesium is then determined by difference at pH 7.0 and 669 m mu where the absorbances of the two metal complexes are additive. Milligram amounts of the alkali metals can be tolerated, but most other metals interfere. (auth)},

  doi          = {},

  url          = {https://www.osti.gov/biblio/4070814},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1963},

  month        = {11}

}

Copy to clipboard

Technical Report:

Other availability

Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that may hold this item. Keep in mind that many technical reports are not cataloged in WorldCat.

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

Arsenic determination and arsenic, lead and copper content of Missouri soils

Book Hess, R E ; Blanchar, R W

Colorimetric methods for determining arsenic content of plant, soil, and solution samples were examined. The method used provides quantitative estimates of arsenic in plants, soils, and solutions when 5..mu..g/g or more arsenic was present in soil or plant tissue, or 0.250 ..mu..g/ml solution. The lower detection limit was 0.5 ..mu..g/g for plant tissue and soils, and 0.1 ..mu..g/ml solution. Wet oxidation of samples using nitric and perchloric acids was compared and found to be more reliable than dry ashing using a slurry of magnesium oxide-magnesium nitrate as a method of solubilizing the As from plant and soil samples. Arsenic, lead,more »« less
Comparative analytical determination of thorium in medium and low-grade minerals and ores using Semimethylthymol Blue

Journal Article Hafez, M A.H. ; Kenawy, I M.M. ; Ramadan, M A.M. - Analytical Letters

The composition, stability constants and molar absorption coefficient of the chelate of thorium ion with Semimethylthymol Blue, SMTB is determined spectrophotometrically in a medium of perchloric acid and sodium perchlorate solution (pH 2.0). In the thorium-SMTB system, a purple red Th(SMTB) chelate is formed with logarithmic overall stability constant of 20.76{+-}0.01 and molar absorption coefficient of 1.44{times}10{sup 4} (560 nm) dm{sup 3} mol{sup {minus}1} cm{sup {minus}1}. SMTB was proposed as a new reagent for the spectrophotometric determination of micro-molar amounts of thorium at {lambda}{sub max} 560 nm. The colour development depends on time, temperature, pH and buffer species. The interferencesmore »« less
https://doi.org/10.1080/00032719408006374
Elemental distribution in coal fly ash particles

Journal Article Hansen, L D ; Fisher, G L - Environ. Sci. Technol.; (United States)

Methods are developed to determine quantitative relative concentrations of elements in the aluminosilicate matrix and in nonmatrix or surface materials of coal flyash. The total element concentration is shown to be dependent on particle size and the solubility of elements in solutions of hydrochloric acid and hydrogen fluoride. Greater than 70% of the sodium, potassim, magnesium, iron, thorium, hafnium, and titanium is associated with the aluminosilicate matrix. More than 70% of the calcium, nickel, anthanum, scandium, strontium, and rare earth elements is associated with an acid-soluble phase. More than 70% of the zinc, cadmium, vanadium, selenium, tungsten, molybdenum, antimony, arsenic,more »« less
https://doi.org/10.1021/es60169a015
SUMMARY TECHNICAL REPORT ON FEED MATERIALS FOR THE PERIOD APRIL 1, 1959 TO JUNE 30, 1959

Technical Report Simmons, J.W. ed.

Anaconda Acld, Kermac, Moab, Rifle, and Texas Zinc uranium concentrates were evaluated (the laboratory portlon of feed material evaluation). Laboratory equilibrium tests and Pilot Plant 2-inch-column extraction tests demonstrated effective distribution of uranium into a TBPkerosene solvent from aqueous phases containing as little as 0.5N HNO/sub 3/ and varying amounts of added metal nitrates (NaNO/sub 3/). The concentration of assoclated nitric acid in dilute aqueous nitric acld solutions was determined after values were obtained for the equillbrium constant for the reaction of tri-n-butyl phosphate with associated nitric acid and for the equilibrium distribution constant for the partition of associated nitricmore »« less
PROCESS DEVELOPMENT QUARTERLY REPORT. PART I. LABORATORY WORK

Technical Report Nelson, J ed

The fraction of uranium in Vitro, Climax, Uravan, and Uranium Reduction concentrates insoluble in nitric acid was not decreased by digestion pressures of 70 to 100 psig and digestion temperatures up to approximately 170 deg C. The rate of solution of the soluble uranium was, however, improved by these more severe digestion conditions. Evaluation of samples of plant streams indicate that the decontamination efficiency of the Weldon Spring refinery is principally limited by entrainment of aqueous phase during the extraction operations rather than by any chemical effects. The measurement of x-ray-diffraction line profiles of UO/ sub 2/ provides a techniquemore »« less

Similar Records