Radiochemical neutron activation analysis of trace lanthanoids in geological and cosmochemical samples
Radiochemical neutron activation analysis of trace lanthanoids in geological and cosmochemical samples
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地质和宇宙化学样品中痕量镧系元素的放射化学中子活化分析
DOI：
10.1007/bf00322725
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
H. Akaiwa
中科院分区：
文献类型：
--
作者：
M. Ebihara;S. Kimura;H. Akaiwa
为了测定地质和宇宙化学样品中的痕量镧系元素，开发了放射化学中子活化分析（RNAA）的分析方法，其中镧系元素通过氢氧化物和氟化物的沉淀以及使用HBr作为洗脱剂的阳离子交换进行放射化学纯化。化学产率由再活化决定。该程序适用于阿连德陨石和地质标准岩石。我们对阿连德的数据与文献值非常一致，而标准岩石JP-1（橄榄岩）和JF-2（长石）的这些值似乎是合理的，其中镧系元素与阿连德相比亏损了1至2个数量级，尽管由于文献数据中的大分散性而没有得到适当的评价。这表明，本RNAA程序是非常有效的测定岩石样品中痕量镧系元素（小于1纳克）。
In order to determine trace lanthanoids in geological and cosmochemical samples, an analytical procedure for radiochemical neutron activation analysis (RNAA) was developed, where lanthanoids are radio-chemically purified through precipitations of hydroxides and fluorides, and cation exchange using HBr as an eluent. Chemical yields are determined by reactivation. The procedure was applied to the Allende meteorite and geological standard rocks. Our data for Allende are in excellent agreement with literature values, and those values for standard rocks, JP-1 (peridotite) and JF-2 (feldspar), in which lanthanoids are depleted by orders of 1 to 2 compared with those in Allende, seem to be reasonable, although not properly evaluated because of large scatterings in their literature data. This suggests that the present RNAA procedure is highly effective in determining trace lanthanoids (less than 1 ng) in rock samples.