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

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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.

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Authors and Affiliations

  1. Institute of Physics, Kazan (Volga Region) Federal University, ul. Kremlevskaya 18, Kazan, 420008, Tatarstan, Russia

    Yu. A. Zakharov, O. B. Kokorina, Yu. V. Lysogorskii & A. E. Staroverov

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  1. Yu. A. Zakharov
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  2. O. B. Kokorina
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  3. Yu. V. Lysogorskii
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  4. A. E. Staroverov
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Additional information

Original Russian Text © Yu.A. Zakharov, O.B. Kokorina, Yu.V. Lysogorskii, A.E. Staroverov, 2012, published in Zhurnal Analiticheskoi Khimii, 2012, Vol. 67, No. 8, pp. 790–798.

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Zakharov, Y.A., Kokorina, O.B., Lysogorskii, Y.V. et al. Computer simulation of two-step atomization in graphite furnaces for analytical atomic spectrometry. J Anal Chem 67, 714–721 (2012). https://doi.org/10.1134/S1061934812060214

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  • DOI: https://doi.org/10.1134/S1061934812060214

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