Numerical simulations of gas flows through an open, non-contact cell for LA-ICP-MS

Numerical simulations of gas flows through an open, non-contact cell for laser ablation are presented. The cell consists of dual, annular, concentric micro-jet gas arrays to entrain ablated material (the carrier flow) and exclude atmosphere (the curtain flow). This study shows that the design of the...

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Bibliographic Details
Published in:Journal of analytical atomic spectrometry 2011-01, Vol.26 (3), p.631-634
Main Authors: Asogan, Dhinesh, Sharp, Barry L., O'Connor, Ciaran J. P., Green, Damon A., Wilkins, Jay
Format: Article
Language:English
Subjects:
Arrays
Atmospherics
Carriers
Computer simulation
Curtains
Gas flow
Mathematical analysis
Mathematical models
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Summary:Numerical simulations of gas flows through an open, non-contact cell for laser ablation are presented. The cell consists of dual, annular, concentric micro-jet gas arrays to entrain ablated material (the carrier flow) and exclude atmosphere (the curtain flow). This study shows that the design of the cell affords a very high degree of exclusion of atmospheric gases, using a relatively low curtain flow of 2.5 l min-1 (with a carrier flow of 1.2 l min-1 He), and demonstrates the efficacy of the micro-jet arrays in providing an axially symmetric exclusion zone. Minimum particle transit times through the cell were calculated to be of the order of 50-100 ms.
ISSN:0267-9477
1364-5544
DOI:10.1039/C0JA00166J