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Issue 10, 2017
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Fundamental studies of an atmospheric-pressure microwave plasma sustained in nitrogen for atomic emission spectrometry

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Abstract

We report the results of fundamental studies of an atmospheric-pressure microwave plasma sustained in nitrogen. Plasma composition was modelled using chemical equilibrium software, with the measured temperature used as input for the program. The modelled electron density agreed well with the electron density measured in Thomson scattering experiments. The various temperatures measured (electronic excitation, electron, and rotational) were comparable, and we argue that the N2 microwave plasma is close to local thermodynamic equilibrium (LTE). This close-to-LTE behaviour was used as a basis to calculate the emission spectra of selected elements; the calculated spectra were compared with measured library spectra, and good agreement was found.

Graphical abstract: Fundamental studies of an atmospheric-pressure microwave plasma sustained in nitrogen for atomic emission spectrometry

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Publication details

The article was received on 20 Apr 2017, accepted on 21 Aug 2017 and first published on 21 Aug 2017


Article type: Paper
DOI: 10.1039/C7JA00159B
Citation: J. Anal. At. Spectrom., 2017,32, 1988-2002
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    Fundamental studies of an atmospheric-pressure microwave plasma sustained in nitrogen for atomic emission spectrometry

    N. Chalyavi, P. S. Doidge, R. J. S. Morrison and G. B. Partridge, J. Anal. At. Spectrom., 2017, 32, 1988
    DOI: 10.1039/C7JA00159B

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