Simulation of droplet heating and desolvation in an inductively coupled plasma - Part I

Craig M. Benson, Sergey F. Gimelshein, Deborah A. Levin, Akbar Montaser

Research output: Contribution to journalArticlepeer-review

Abstract

The total desolvation rate of sample droplets in an argon inductively coupled plasma (Ar ICP) is investigated through the development of a two-phase continuum flow computer model. The desolvation model is supplemented by equations used to determine the trajectories of particles through the plasma. The model is used to calculate the behavior of aerosol droplets from a direct injection high efficiency nebulizer (DIHEN), a micronebulizer used to inject microliter quantities of samples that are toxic, expensive, or of limited volume. We use the combination of desolvation and transport models to present the first predicted spatial distribution of droplet concentrations and evaporation rates in an ICP flow. These data are compared with the behavior of a DIHEN spray in an environment with no net argon gas flow to determine the importance of gas flow rates to overall droplet concentration profiles in the ICP. In addition, two separate techniques (Stokes’ equation and the direct simulation Monte Carlo treatment) for determining droplet trajectories are contrasted.

Original languageEnglish (US)
Pages (from-to)1097-1112
Number of pages16
JournalSpectrochimica Acta - Part B Atomic Spectroscopy
Volume56
Issue number7
DOIs
StatePublished - Jan 1 2001
Externally publishedYes

Keywords

  • Aerosol diagnostics
  • Computer simulation
  • Desolvation
  • Direct simulation Monte Carlo method
  • Droplet heating
  • Inductively coupled plasma

ASJC Scopus subject areas

  • Analytical Chemistry
  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Spectroscopy

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