Original scientific paper
Determination of strontium-90 in milk by means of yttrium-90 extraction with tributylphosphate
M. Picer
; Institut za medicinska istraživanja i medicinu rada Jugoslavenske akademije znanosti i umjetnosti, Zagreb
Abstract
A simple and relatively quick method for the determination of strontium-90 in milk is described. The method is based on the proferential extraction of yttrium-90 with tributylphosphate from a weak nitric acid solution of milk ash to which is added CaO. The effects of calcium, iron and phosphates on the determination of yttrium carrier yield and on the distribution coefficients of yttrium-90 are discussed. The radioactive interferences of Ce144, Ru106, Zr95, Cs137 and Sr65 in the determination of Y90 activity are dealt with. Results of strontium determination in Sr90 spiked milk and in naturally contaminated milk are presented.
Keywords
Hrčak ID:
175233
URI
Publication date:
17.9.1969.
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