いわゆる「原爆マグロ」に附着せる放射性物質について

抄録

Tunney fishes on board the No.5 Fukuryu Maru were Shipped from Yaizu to Kanazawa in March 1954. The radioactive substance adhered on the surface of tunney was collected and investigated with the following result.The strongest radioactivity was found in portion collected from epidermis and it showed 205 c/m per cm²(estimated on March 18 by use of Nuclear Type D-34, G.M.Counter Tube);larger part of radioactive substances were found to be adhered on scales and they were in the form of difficultly:soluble in water. Only the surface of scales was treated with hydrochloric acid in order to dissolve larger part of adioactive substance, the solution was concentrated and the contents were detected by paper chromatography.Four solvents were consisted of (A) EtOH: BuOH:10%aq.soln.of NH₄SCN (5:5:2);(B)BuOH satd.with 3 NHCl;(C)Me₂CO:BuOH: concd.HCl(5:2:1), and(D)MeOH:BuOH(3:1).The result of estimation indicated the presence of Ba¹⁴⁰, Sr⁸⁹ or Sr⁹⁰ and Te¹³², radioactive Zr (Zr⁹⁵) and the other radioactive rare earths andU²³⁷ were also considered to be present.