Scanning vs. single spot laser ablation (213 nm) inductively coupled plasma mass spectrometry

Publication Type
Journal Article
Authors
LBL Report Number
LBNL-56155
Abstract

Sampling strategy is defined in this work as the interaction of a repetitively pulsed laser beam with a fixed position on a sample (single spot) or with a moving sample (scan). Analytical performance of these sampling strategies was compared by using 213 nm laser ablation ICP-MS. A geological rock (Tuff) was quantitatively analyzed based on NIST series 610-616 glass standard reference materials. Laser ablation data were compared to ICP-MS analysis of the dissolved samples. The scan strategy (50 mmys) produced a flat, steady temporal ICP-MS response whereas the single spot strategy produced a signal that decayed with time (after 60 s). Single-spot sampling provided better accuracy and precision than the scan strategy when the first 15 s of the sampling time was eliminated from the data analysis. In addition, the single spot strategy showed less matrix dependence among the four NIST glasses.

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LBNL-56155 IN FILE

Journal
Spectrochim.Acta Pt.B-At.Spec.
Volume
59
Year of Publication
2004
Pagination
369-374
Accession Number
161
Keywords
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