Matrix effects in laser ablation molecular isotopic spectrometry

Recently, it has been shown that laser-induced breakdown spectroscopy (LIBS) can be used for the detection of isotopes of elements via isotopic shifts in diatomic species in a technique known as laser ablation molecular isotopic spectrometry (LAMIS). While LAMIS works quite well for isotopic analysi...

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Bibliographic Details
Published in:Spectrochimica acta. Part B: Atomic spectroscopy 2014-11, Vol.101, p.204-212
Main Authors: Brown, Staci, Ford, Alan, Akpovo, Charlemagne C., Martinez, Jorge, Johnson, Lewis
Format: Article
Language:English
Subjects:
Boron isotope
Breakdown
Emission
Isotopes
Isotopic analysis
LAMIS
Laser ablation
Laser-ablation molecular isotopic spectrometry
Lasers
Matrix effect
Optimization
Physical properties
Spectrometry
Spectroscopy
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Summary:Recently, it has been shown that laser-induced breakdown spectroscopy (LIBS) can be used for the detection of isotopes of elements via isotopic shifts in diatomic species in a technique known as laser ablation molecular isotopic spectrometry (LAMIS). While LAMIS works quite well for isotopic analysis of pure compounds under optimal conditions, it is desirable for it to be applicable for a variety of compounds and matrices. However, the LIBS plasma emission associated with LAMIS depends on several parameters, including the applied electric field of the laser pulse, the physical properties of the material being investigated, and the presence of additional elements other than the element of interest. In this paper, we address some of the pitfalls arising from these dependencies when using LAMIS for the determination of the relative isotopic abundance of boron-containing materials with varying chemical matrices. •LAMIS usually determines isotopic composition of boron compounds within 3 percent.•LaBO3 and some boron-containing mixtures yield inaccurate LAMIS results.•Higher laser energy reduces variability but does not remedy poor LAMIS outcomes.
ISSN:0584-8547
1873-3565
DOI:10.1016/j.sab.2014.09.003