SEPARATION OF CALCIUM AND STRONTIUM BY LIQUID ION EXCHANGE. DETERMINATION OF TOTAL RADIO-STRONTIUM IN MILK

Journal Article · Sun Dec 01 00:00:00 EST 1963 · Analytical Chemistry (U.S.) Formerly Ind. Eng. Chem., Anal. Ed.

OSTI ID:4149922

Butler, F E

A rapid liquid ion exchange method is described for separating quantities of calcium from strontium in dilute acid solution. Separate extractions were made with di-2ethylhexyl phosphoric acid (HDEHP) dissolved in toluene after stepwise pH adjustments of the aqueous solution. Calcium, strontium, and other cations in 250 ml of milk were first concentrated in 60 ml of dilute HCl solution by a batch ion exchange resin technique. After separation of calcium and radiostrontium by the liquid ion exchange method, Sr/sup 89/ and Sr/sup 90/ were stripped from the final organic phase with 3N HNV/sub 3/ and precipitated from fuming nitric acid. The counting planchet contained only 2% of the calcium and 85 plus or minus 51% of the strontium in the original milk sample. Decontamination factors for Y/sup 90/, Cs/sup 137/, K/sup 40/, La/sup 14 and I/sup 131/ were greater than 10/sup 3/. Ballo, if present, can be removed by homogeneous precipitation of barium chromate. (auth)

• Research Organization: E. I. du Pont de Nemours; Co., Aiken, S.C.
• NSA Number: NSA-18-001514
• OSTI ID: 4149922
• Journal Information: Analytical Chemistry (U.S.) Formerly Ind. Eng. Chem., Anal. Ed., Vol. Vol: 35; Other Information: Orig. Receipt Date: 31-DEC-64
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

CHEMISTRY
ACIDITY
ALKYL RADICALS
BARIUM 140
BARIUM OXIDES
CALCIUM
CESIUM 137
CHROMIUM OXIDES
COUNTERS
DECONTAMINATION
DEHPA
ENRICHMENT
HYDROCHLORIC ACID
IODINE 131
ION EXCHANGE
LANTHANUM 140
MILK
NITRIC ACID
ORGANIC PHOSPHORUS COMPOUNDS
PHOSPHORIC ACID
POTASSIUM 40
PRECIPITATION
QUANTITATIVE ANALYSIS
SEPARATION PROCESSES
SOLUTIONS
SOLVENT EXTRACTION
STRONTIUM
STRONTIUM 89
STRONTIUM 90
TOLUENE
VAPORS
WATER
YTTRIUM 90