【摘要】 本工作建立了一个以长链伯胺N₁₉₂₃萃取为基础的放射化学中子活化分析法,可测定含量低达10^-12g/g的Ir。影响Ir萃取率的关键是Ir在水溶液中的化学形态,而不是其价态。此外,我们发展了一个用于地质样品物相分离的化学分相方法,研究了白垩系-第三系界线粘土样品中异常Ir的赋存状态。更多还原

【Abstract】 12（1）,43～47In this paper a radiochemical neutron activation analysis method was developed on the basis of extraction by Ions-chain primary amine N₁₉₂₃, which is able to determine the Ir contents as low as 10^-12g/g. The key factor affecting the extraction rate of Ir is the chemical state of Ir in aqueous solution rather than its valence state. Further, a chemical phase separation method for geological samples was also developed, by which the Ir species in clay samples at Cretaceous-Tertiary boundary was studied.更多还原