Isolation of strontium-90, yttrium-90, promethium-147, and cerium-144 from wet ashed urine by calcium oxalate coprecipitation and sequential solvent extraction
A method has been developed for separating low-level activities of the ..beta..-emitting isotopes strontium-90, yttrium-90, promethium-147, and cerium-144 from urine and aqueous solutions. They are subsequently estimated by direct counting of sources on planchets or by liquid scintillation counting. The radionuclides are separated from each other and from interfering elements by solvent extraction with HDEHP (di-2-ethylhexyl)phosphoric acid) in n-heptane. It is possible to separate the elements of interest with a minimum cross contamination by selecting appropriate pHs and solvent concentrations. Percentage recoveries for the above radionuclides are as follows: /sup 90/Sr, 100 +- 12; /sup 90/Y, 65 +- 4; /sup 147/Pm, 90 +- 8; /sup 144/Ce, 87 +- 11. The limits of detection are as follows: /sup 90/Sr, 0.6 pCi; /sup 90/Y, 0.7 pCi; /sup 147/Pm, 1.0 pCi; /sup 144/Ce, 0.8 pCi (1 pCi = 37 mBq). 16 references, 2 figures, 2 tables.
- Research Organization:
- Chalk River Nuclear Labs., Ontario
- OSTI ID:
- 5780678
- Journal Information:
- Anal. Chem.; (United States), Vol. 54
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CERIUM 144
COPRECIPITATION
SCINTILLATION COUNTING
SOLVENT EXTRACTION
PROMETHIUM 147
STRONTIUM 90
YTTRIUM 90
AQUEOUS SOLUTIONS
BETA DECAY RADIOISOTOPES
CALCIUM COMPOUNDS
HDEHP
LIQUID SCINTILLATION DETECTORS
OXALATES
PH VALUE
URINE
WET ASHING
ALKALINE EARTH ISOTOPES
ALKALINE EARTH METAL COMPOUNDS
BETA-MINUS DECAY RADIOISOTOPES
BIOLOGICAL MATERIALS
BIOLOGICAL WASTES
BODY FLUIDS
CARBOXYLIC ACID SALTS
CERIUM ISOTOPES
COUNTING TECHNIQUES
DAYS LIVING RADIOISOTOPES
DISPERSIONS
ESTERS
EVEN-EVEN NUCLEI
EXTRACTION
HOURS LIVING RADIOISOTOPES
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MATERIALS
MEASURING INSTRUMENTS
MIXTURES
NUCLEI
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
PHOSPHORIC ACID ESTERS
PRECIPITATION
PROMETHIUM ISOTOPES
RADIATION DETECTORS
RADIOISOTOPES
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
SCINTILLATION COUNTERS
SEPARATION PROCESSES
SOLUTIONS
STRONTIUM ISOTOPES
WASTES
YEARS LIVING RADIOISOTOPES
YTTRIUM ISOTOPES
400103* - Radiometric & Radiochemical Procedures- (-1987)
400105 - Separation Procedures