THE SEPARATION OF RADIUM FROM RADIUM D, RADIUM E, AND POLONIUM USING ETHYL- LENEDIAMINETETRAACETATE

Journal Article · Wed Jan 01 04:00:00 EST 1958 · Zeitschrift fuer Analytische Chemie (West Germany) Changed to Fresnius Z. Anal. Chem.

OSTI ID:4229019

Vebersik, V; Horava, K

A complexometric method for the separation of Ra/sup226/ from long-lived active precipitates of RaD, RaE, and Po was developed. The method is based on the ablilty of these precipitates to form stable complexes with complexone III in contrast to Ra/sup 226/. When (NH/sub 4/)/sub 2/2SO/sub 4/ is added to the te st solution in the presence of complexone III it precipitates only the Ra/sup 228/ as RaSO/sub 4/. The Ra-salt to be analyzed is dissolved in 100 ml water, 3 drops of 20% HCL are added together with 10 ml of a pH 4.5 acetate buffer solution (130 ml conc CH/sub 3/COH, 200 ml NH/sub 4/OH, and 200 ml doubly distilled water) and 10 ml of a 1% solution of 1. The mixture is refluxed until the quantitative conversion of RaD, RaE, and Po into complexes with I, 3 mi of 10% (NH/sub 4/)/sub 2/SO/sub 4/ are added, and the solution allowed to stand for 6 hrs. The precipitate of RaSO/sub 4/ which is formed is filtered off (blue-ribbon filter {sic} and washed with a 1% solution of (NH/sub 4/)/sub 2/SO/sub 4/. It was found that the RaSO/sub 4/ precipitate is soluble when refluxed in a 3 to 5% ammoniacal solution of ethylenediaminetetraacetic acid. When the solution thus obtained is acidified with acetic acid to a methyl red end point, followed by refluxing dad long standing at room temperature, a precipitate of large crystals of RaSO/sub 4/ is formed. A determination of Ra/sup 226/ by gamma - and of RaD and RaE by beta -activity (Po is determined by gamma -activity) has shown that the loss of Ra during the operations is 10/sup -5/ gm per 100 gms water and the loss of RaD, RaE, and Po, plus or minus 3%.

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-14-001560
• OSTI ID: 4229019
• Journal Information: Zeitschrift fuer Analytische Chemie (West Germany) Changed to Fresnius Z. Anal. Chem., Journal Name: Zeitschrift fuer Analytische Chemie (West Germany) Changed to Fresnius Z. Anal. Chem. Vol. Vol: 162; ISSN ZANCA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ACETIC ACID
AMMONIA
AMMONIUM COMPOUNDS
BETA PARTICLES
BISMUTH 210
CHEMISTRY
COMPLEXES
CONVERSION
CRYSTALS
EDTA
FILTERS
GAMMA RADIATION
LEAD 210
MEASURED VALUES
POLONIUM
PRECIPITATION
RADIUM
RADIUM 226
RADIUM SULFATES
SEPARATION PROCESSES
SOLUTIONS
STABILITY
SULFATES
USES
WATER