[Incineration system for the disposal of 125I-radioimmunoassay test tube wastes--confirmation of 125I decay in wastes].
Before incineration of disposed RIA test tubes, residual 125I radioactivity should be measured for the purpose of radiation safety. This confirmation method has been carried out according to the followings: Residual 125I radioactivity of test tubes in the plastic bag was measured from outside with the low-energy gamma-ray survey meter (S1371, Ohyo Kohken CO., Ltd.) newly developed by one of the authors. Gaseous 125I released from the residual 125I-compounds in test tubes by radiation self decomposition was adsorbed by the activated carbon fiber filter (ACFF), and was measured. From the above 2 methods, the minimum detectable concentration of residual 125I in waste tubes would be reached under a level of about 100 mBq/g (2.8 X 10(-6) muCi/g).
D007457:Iodine Radioisotopes / Q000032:analysis*; D008506:Medical Waste; D011850:Radioactive Waste / Q000517:prevention & control*; D011851:Radioactivity; D011863:Radioimmunoassay / Q000295:instrumentation*; D012449:Safety
D007457:Iodine Radioisotopes; D008506:Medical Waste; D011850:Radioactive Waste