The preparation of chloroplatinic acid labelled with platinum radioisotopes

A procedure has been worked out for the preparation of chloroplatinic acid from natural metallic platinum irradiated in a nuclear reactor and purified from¹⁹⁹Au impurities by extraction from acidic solutions with ethyl acetate. It was shown that the effective K X-ray activity of natural platinum on irradiation with moderate neutron fluxes /3×10¹³/ was comparable with that of^195mPt obtained from 100%¹⁹⁴Pt/with identical neutron fluxes/. Contaminations from¹⁹³Pt /50 years/ is insignificant and do not produce noticeable radiation loads on the organism on medical tests in vivo.