Hadiochemical Anclyses of Tuna Fish
9, Method
Tamiya ASART, Morito CHIBA,
Tadashi ARIKI and
Toshiaki, YOSHINAGA
The Analyt
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Radioactive “Sr,
‘es, “to |
gn
and total rare earth elements in tuna fish
caught by the ship "Shoyo Maru" were analysed.
The analytical procedure apolied and results
of analyses are given in tables. The level of
radioactivity of tuna fish examined is low,
but the higher activity found in organs Suggest
their intake of planktons which may contaminated
by radioactive substance.
Radioactive nuclides were determined in muscles
and orgens of 8 tuna fish caught by the ship "Shoyo Maru",
which was despatched to survey the radioactivity of the
middle Pacific Ocean in 1962,
1. Preparation of samples
(a) The internal organs including the contents of the
stomach and intestines were coaked and then ashed in
an electric furnace at 400 - 500°C.
(b) The Skins were removed to eliminate the possibilities of the external contamination of the samples,
then muscles were coaked and ashed in the same manner
as the organs.
* Japan Analytical Chemistry Research Institute
». Determina’
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ABSTRACT
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