High precision measurement of iron isotopes by plasma source mass spectrometry

被引：156
|
作者：
Belshaw, NS [1 ]
Zhu, XK [1 ]
Guo, Y [1 ]
O'Nions, RK [1 ]
机构：
[1] Univ Oxford, Dept Earth Sci, Oxford OX1 3PR, England
来源：
INTERNATIONAL JOURNAL OF MASS SPECTROMETRY | 2000年 / 197卷
关键词：
plasma source mass spectrometry; Fe-isotopes; stable isotope;
D O I：
10.1016/S1387-3806(99)00245-6
中图分类号：
O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号：
070203 ; 070304 ; 081704 ; 1406 ;
摘要：
Multiple-collector inductively coupled plasma mass spectrometry has been used for the precise measurement of natural variations in the isotopic composition of Fe. The contributions of Ar-O and Ar-N molecular species to the mass spectrum in the Fe mass region are minimised and the repeatability of the Fe-57/Fe-54 ratio of a sample Fe solution relative to the IRMM-14 Fe isotope standard is better than 100 ppm at 95% confidence. Variations in sample Fe-57/Fe-54 ratio are expressed as epsilon(57)Fe units, which are deviations in parts per 10(4) from the same ratio in the IRMM-14 Fe isotope reference standard. Measurements of epsilon(57)Fe are presented for samples of meteoritic iron and terrestrial Fe-oxides and carbonates. (C) 2000 Elsevier Science B.V.
引用
收藏
页码：191 / 195
页数：5
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