CESIUM-137 AND STRONTIUM-90 IN MILK
Cs/sup 1//sup 2//sup 7/ and Sr/sup 9//sup 0/ levels in liquid milk samples from Bombay and 27 other stations in India, and powder milk samples from Australia, Denmark, Holland, India, U. K., and U. S. A. were estimated. Cs/sup 1/ /sup 3//sup 7/ levels were estimated using a 10-channel scintillation spectrometer. Sr/sup 9//sup 0/ levels were measured by chemical separation of Sr/ sup 9//sup 0/ from samples of milk and measurement of beta activity on a lowlevel beta counting instrument. The average levels of Cs/sup 1//sup 3//sup 7/ in Bombay milk were 9.4 uuc/gram of potassium, 18.3 uuc/gram of potassium, and 11.4 uuc/gram of potassium, for the years 1958, 1959, and 1960, respectively. The corresponding levels of Sr/sup 9//sup 0/ were 2.3 uuc/gram of calcium, 4.9 uuc/ gram of calcium, and 2.6 uuc/gram of calcium, respectively, for the same period. The country wide samples show average levels of 1.7 uuc Cs/sup 1//sup 3//sup 7// gram of potassium and 5.9 uuc Sr/sup 9//sup 0//gram of calcium during the year 1959. In 1960 these levels dropped down to 5.5 uuc Cs/sup 1//sup 3//sup 7//gram of potassium and 2.3 uuc Sr/sup 9//sup 0//gram of calcium. The maximum and minimum levels of Cs/sup 1//sup 3//sup 7/ in India in 1959 were 159.9 and 3.2 uuc/ gram of potassium, respectively. The corresponding maximum snd minimum levels of Sr/sup 9//sup 0/ were 32.6 snd 0.5 uuc/gram of calcium, respectively. It was further observed that Cs/sup 1//sup 3//sup 7/ snd Sr/sup 9//sup 0/ contents in Australian and Indian milk were lowest and of the same order. The concentrations were highest in the sample from U. K. The results of these measurements were interpreted on the basis of the total injection of these isotopes in the atmosphere, their rate of fall-out, snd seasonal effects. (auth)
- Research Organization:
- India. Atomic Energy Establishment, Trombay
- NSA Number:
- NSA-15-021987
- OSTI ID:
- 4044879
- Report Number(s):
- AEET-AM-21
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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