Determination of Strontium-90 in urine by extraction without ashing

Journal Article · Thu Mar 01 04:00:00 EST 1984 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac00267a074· OSTI ID:5529219

Scasnar, V

Urine is a complex matrix. Any analytical separation that attempts to isolate an almost insignificant mass of material from urine must be capable of overcoming the high variability of sample composition. The urine is usually ashed to destroy all organic constituents to reduce the complexity of the sample. This step is time- and labor-consuming. In the method proposed no ashing of urine sample is necessary. Accordingly, radiostrontium can be directly extracted from urine after cesium has been extracted, when a proper amount of PEG 300 is added. This paper demonstrates that PEG strongly increases the extraction of microamounts of strontium into nitrobenzene, when the univalent hydrophobic anion of dicarbolide-H/sup +/ was used. The magnitude of the synergistic effect > 10/sup 3/ creates good conditions for the extraction of strontium after previous extraction of cesium. Since both radionuclides are most significant components of fission mixture and the extraction of other fission and activated radionuclides using dicarbolide-H/sup +/ appears to be low, the conditions for a selective and quantitative separation of radiostrontium from contaminated urine were investigated in this work. Dicarbolide-H/sup +/ with high stability constant of its complex anion, fully dissociated and stable also in a high acidic media, together with PEG of mean relative molecular mass 300 was used for this purpose.

• Research Organization: Institute of Experimental Pharmacology, Bratislava, Czechoslovakia
• OSTI ID: 5529219
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 56:3; ISSN ANCHA
• Country of Publication: United States
• Language: English

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ALKALI METALS
ALKALINE EARTH ISOTOPES
BETA DECAY RADIOISOTOPES
BETA SPECTROSCOPY
BETA-MINUS DECAY RADIOISOTOPES
BIOLOGICAL MATERIALS
BIOLOGICAL WASTES
BODY FLUIDS
CESIUM
CHEMICAL ANALYSIS
DATA
DRY ASHING
ELEMENTS
EVEN-EVEN NUCLEI
EXPERIMENTAL DATA
EXTRACTION
INFORMATION
INTERMEDIATE MASS NUCLEI
ISOTOPES
MATERIALS
METALS
NITRO COMPOUNDS
NITROBENZENE
NUCLEI
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
QUANTITATIVE CHEMICAL ANALYSIS
RADIOISOTOPES
SEPARATION PROCESSES
SOLVENT EXTRACTION
SPECTROSCOPY
STRONTIUM 90
STRONTIUM ISOTOPES
TRACE AMOUNTS
URINE
WASTES
YEARS LIVING RADIOISOTOPES