Removal of 57Co-Bleomycin from urine

We studied the methods for the removal of 57Co-Bleomycin from urine. In this paper the results by the following four methods are described. 1) Boiling Method: The urine is boiled with the filter paper. Water escapes as vapor, and as a result the 57Co-Bleomycin is adsorbed in the filter paper. 57Co-Bleomycin is not volatilized. The removal efficiency of filter paper was more than 96% under the different conditions of urines. 2) Charcoal Method: (Removal of 57Co-Bleomycin from urine by ''SIRASAGI-A'' charcoal) a. Centrifuging Method. B. Column Method. c. Precipitation Method. The efficiency of removal from 1500 ml of urine by each of the three methods was about 95% with 4-5 g of charcoal at 180C. In order to charcoal with good performance, it was necessary to removed it within two days. Nowadays we collect and stock the urine for the first 24 hours. We adopt the ''Precipitation Method'' for urines within two days and the ''Boiling Method'' for urine more than three days. (J.P.N.)