INAA in the determination of the elemental constituents of a natural fluorite

被引:11
作者
Balogun, FA [1 ]
Tubosun, IA
Akanle, AO
Ojo, JO
Adesanmi, CA
Ajao, JA
Spyrou, NM
机构
[1] Obafemi Awolowo Univ, Ctr Energy Res & Dev, Ile Ife, Nigeria
[2] Obafemi Awolowo Univ, Dept Phys, Ile Ife, Nigeria
[3] Univ Surrey, Dept Phys, Guildford GU2 5XH, Surrey, England
关键词
D O I
10.1007/BF02034243
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
A complementary use of the comparative and the semi-absolute variations of instrumental neutron activation analysis (INAA) has enabled us to determine 22 different elements in a sample of natural fluorite originating from the younger granite province of Nigeria ?he mineral has a brownish purple appearance with some veinlets having a deep purple coloration. Of all the 22 elements measured, Fe (851.36 ppm), Sb (7.69 ppm), Ag (87.4 ppm), Hg (2.71 ppm) and Se (1.97 ppm) are found to be exclusive to the veinlets while Au (109.15 ppm), Co (2.15 ppm) and W (173.20 ppm) are concentrated in the main matrix of the fluorite. With the aid of the semi-absolute method, it was possible to measure the Au concentration in the IAEA Soil-7 reference material to be 56.83 +/- 5.87% ppm. A qualitative electron microprobe analysis (EMA) showed that the bulk of the matrix is composed mainly of Ca and F, as expected.
引用
收藏
页码:35 / 38
页数:4
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