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本工作建立了一个以长链伯胺N_(1923)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~(-12)g/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。
In this work, a new radiochemical neutron activation analysis based on the extraction of long-chain primary amines N_ (1923) was developed. Ir can be determined as low as 10 ~ (-12) g / g. The key factor affecting Ir extraction rate is the chemical form of Ir in aqueous solution, not its valence state. In addition, we developed a chemical phase separation method for the phase separation of geological samples and studied the occurrence of abnormal Ir in the Cretaceous-Tertiary clay samples.