Determination of chlorine, bromine and iodine in rock samples by radiochemical neutron activation analysis
Determination of chlorine, bromine and iodine in rock samples by radiochemical neutron activation analysis
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放射化学中子活化分析法测定岩石样品中的氯、溴和碘
DOI：
10.1007/bf02034504
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发表时间：
1997
影响因子：
1.6
通讯作者：
H. Nakahara
中科院分区：
文献类型：
--
作者：
M. Ebihara;H. Ozaki;F. Kato;H. Nakahara
用放化中子活化分析法测定了岩石样品中的氯、溴和碘（以下简称卤素）。在Rikkyo大学原子能研究所的TRIGA-II反应堆中，使用或不使用镉过滤器，同时对粉末样品和由化学试剂制备的参比标准品进行10至30分钟的辐照。在辐照后立即对样品进行卤素的放射化学程序。碘首先以PdI 2形式沉淀，氯和溴同时依次以卤化银形式沉淀。在这项研究中，地质标准岩石，沉积岩和陨石进行了微量卤素分析。在一些南极陨石中，碘含量被观察到非常高。氯含量也有点高。碘和氯的过量一定是由南极洲的陆地污染造成的。
Chlorine, bromine and iodine (hereafter, halogens) were detemined for rock samples by radiochemical neutron activation analysis. The powdered samples and reference standards prepared from chemical reagents were simultaneously irradiated for 10 to 30 minutes with or without a cadmium filter in a TRIGA-II reactor at the Institute for Atomic Energy, Rikkyo University. The samples were subjected to radiochemical procedures of halogens immediately after the irradiation. Iodine was firstly precipitated as PdI2, and chlorine and bromine were successively precipitated as Ag-halides at the same time. In this study, geological standard rocks, sedimentary rocks and meteorites were analyzed for trace halogens. In some Antarctic meteorites, iodine contents were observed to be anomalously high. Chlorine contents also are somewhat high. The overabundance of iodine and chlorine must be caused by terrestrial contamination on the Antarctica.