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Título : Scanning vs. single spot laser ablation (λ=213 nm) inductively coupled plasma mass spectrometry
Autor : Gonzalez, Jhanis J.
Fernández, Alberto
Mao, Xianglei
Russo, Richard E.
Palabras clave : Laser ablation
Inductively coupled plasma mass spectrometry
NIST glass
Sampling strategy
Fecha de publicación : 2004
Editorial : Spectrochimica Acta
Citación : Part B;59
Resumen : 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 µm/s) 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.
ISSN : 0584-8547
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