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Journal of Analytical Chemistry

, Volume 67, Issue 8, pp 714–721 | Cite as

Computer simulation of two-step atomization in graphite furnaces for analytical atomic spectrometry

  • Yu. A. Zakharov
  • O. B. Kokorina
  • Yu. V. Lysogorskii
  • A. E. Staroverov
Articles

Abstract

The processes of sample fractionation by two-step atomization with the intermediate condensation of the analyte on a cold surface in graphite furnaces were theoretically studied. The transfer equation was solved for the atoms, molecules, and condensed particles of the sample from a flow of argon directed along this surface. The spatial distributions of vapor and the condensate formed were calculated depending on the composition and flow rate. It was found that a cold surface section with a length of 6 mm is sufficient for the complete trapping of atomic analyte vapor from an argon layer having a velocity of about 1 m/sec and a thickness of 5 mm. In this case, the molecules and clusters condensation coefficients smaller than unity were deposited insignificantly; that is, they were fractionally separated. The results of the shadow spectral visualization of the process of sample fractionation on a cold probe surface of in commercial HGA and THGA atomizers were interpreted. The advantages of analytical signals upon the evaporation of a sample condensate from the probe in these atomizers and inductively coupled plasma were demonstrated.

Keywords

analytical atomic spectrometry two-step probe atomization sample fractionation vapor condensation 

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Copyright information

© Pleiades Publishing, Ltd. 2012

Authors and Affiliations

  • Yu. A. Zakharov
    • 1
  • O. B. Kokorina
    • 1
  • Yu. V. Lysogorskii
    • 1
  • A. E. Staroverov
    • 1
  1. 1.Institute of PhysicsKazan (Volga Region) Federal UniversityKazanTatarstan, Russia

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