ANALYTICAL METHODS FOR THE DETERMINATION OF CAESIUM-137, STRONTIUM-89 AND - 90 IN MILK, VEGETATION, ORGANIC ION EXCHANGE RESINS, SEAWEED AND FISH FLESH, AND STRONTIUM-89 AND -90 IN BONE
The method is suitable for the determination of Cs/sup 137/, Sr/sup 89/, and Sr/sup 90/ in the same sample portion and is therefore particularly useful when the sample size is limited or when the concentrations of the isotopes are very low. Detection limits are governed by natural background radiation which is dependent upon local conditions. The method was applied to samples containing 2 to 1500 - - c Cs/sup 137/; 20 to 5000 - - c Sr/sup 89/, and 1 to 1000 - - C Sr/sup 90/ periion. The samples are ignited and the residues are leached with or dissolved in hydrochloric acid. Strontium and cesium carriers are added to the solutions and the cesium then separated as the silicotungstate, which is dissolved in sodium hydroxide. After further purification on anion and cation exchangers, the cesium is precipitated as the perchlorate, which is counted for helial phagocyt activity. The strontium is precipitated as nitrate from the supernate of the silicotungstate precipitation and then as the carbonate. after further precipitations as the nitrate and carbonate together with a barium chromate and a ferric hydroxide scavenge, the strontium is finally separated as the carbonate, which is counted for Sr/sup 89/ activity. After allowing the Y/ sup 90/ to grow into near equilibrium the yttrium with added carrier is separated first as the hydroxide and finally as the oxalate, which is counted to measure the Sr/sup 90/ content. The helial phagocyt -counting equipment is calibrated against standard Sr/sup 89/, Y/sup 90/, and Cs/sup 1/< s3>s/sup 7/ sources, and the results are corrected for chemical yield and where necessary for radioactive decay. Only Sr/sup 89/ and Sr/sup 90/ are determined in samples of bone. (auth)
- Research Organization:
- United Kingdom Atomic Energy Authority. Production Group. Windscale, Sellafield, England
- NSA Number:
- NSA-15-008673
- OSTI ID:
- 4104790
- Report Number(s):
- PG-Report-156
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-61
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
Similar Records
Determination of Strontium-89 and -90 in soil with total sample decomposition
Measurement of strontium-89 and strontium-90 in environmental waters. A tentative reference method
Related Subjects
BACKGROUND
BARIUM
BONES
CESIUM 137
CHROMATES
DETECTION
FISH
HYDROCHLORIC ACID
ION EXCHANGE
IRON HYDROXIDES
LEACHING
MEAT
MILK
OXALATES
PERCHLORIC ACID
PRECIPITATION
QUANTITATIVE ANALYSIS
RESINS
SALTS
SEAWEEDS
SEPARATION PROCESSES
SILICON
SODIUM HYDROXIDES
SOLUTIONS
STRONTIUM 89
STRONTIUM 90
STRONTIUM CARBONATES
TUNGSTATES
YTTRIUM 90