MATRIX EFFECTS ON THE RELATIVE SENSITIVITY FACTORS MEASURED BY LASER MICROPROBE MASS-SPECTROMETRY

被引:4
作者
BATE, DJ
LEAKE, JA
MATTHEWS, LJ
WALLACH, ER
机构
[1] Department of Materials Science and Metallurgy, University of Cambridge, Cambridge, CB2 3QZ, Pembroke Street
来源
INTERNATIONAL JOURNAL OF MASS SPECTROMETRY AND ION PROCESSES | 1993年 / 127卷
关键词
MATRIX EFFECTS; RELATIVE SENSITIVITY FACTORS; LASER MICROPROBE MASS SPECTROMETRY;
D O I
10.1016/0168-1176(93)87081-3
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
Analyses using a LIMA-2A laser microprobe of Fe3Al 3 at.% X and metal oxide samples are reported. The results are compared to the local thermodynamic equilibrium (LTE) model in which the relative sensitivity factor (RSF) is predicted to depend on the ionisation potential. The RSF depended on the ionisation energy for metals in Fe3Al 3 at.% X as expected, but not for non-metals. The agreement for non-metals was enhanced if they were plotted at a corrected ionisation energy given by the ionisation energy of the element in the same row of the periodic table with the electronic configuration (noble gas+s2+one electron) i.e. for silicon the corrected ionisation energy is that of aluminium. A possible explanation of this is that the metallic sea of electrons in the Fe3Al has altered the electronic state of the dopant element X if X is not itself a metal. Analyses on metal oxides with differing oxidation states showed that the RSF depended on the electronic state of the metal. Thus lending weight to the hypothesis that the production of ions from a sample depends on the electronic structure of the element in the matrix rather than in isolated form.
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页码:85 / 93
页数:9
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