Instrumental and Radiochemical Neutron Activation Analysis of Trace Iodine in Geological Samples
Instrumental and Radiochemical Neutron Activation Analysis of Trace Iodine in Geological Samples
复制标题
地质样品中痕量碘的仪器和放射化学中子活化分析
DOI：
10.2116/analsci.8.183
复制
发表时间：
1992
影响因子：
1.6
通讯作者：
K. Tomura
中科院分区：
文献类型：
--
作者：
M. Ebihara;N. Saito;H. Akaiwa;K. Tomura
为了测定地质样品（火成岩和沉积岩）中的痕量碘，我们考察了使用短寿命核素^128 I进行仪器中子活化分析和放射化学中子活化分析（NAA）的适用性。采用TRIGA型反应器，以Cd金属或碳化硼为热中子吸收滤光片的仪器中子活化分析法，可用于沉积岩中ppm级碘的测定。此外，放射化学NAA（RNAA）可以降低检测限下降到几个ppb的火成岩样品。即使采用RNAA，至少6个样品可以进行常规分析一天（6小时的反应器操作），使用本工作中报告的分析方法。
For determining trace amounts of iodine in geological samples (igneous and sedimentary rocks), applicabilities of instrumental and radiochemical neutron activation analyses (NAA) using a short-lived nuclide ^128I were examined. Instrumental NAA using a TRIGA-type reactor and Cd metal or boron carbide as an absorbing filter of thermal neutron could be applied for the determination of iodine in ppm level in sedimentary rocks. Further, radiochemical NAA (RNAA) could lower the detection limit down to several ppb for igneous rock samples. Even though RNAA was employed, at least 6 samples could be routinely analyzed a day (6 h in reactor operation) using the analytical procedures reported in this work.