Excitation of metal spectra in combined glow discharge |
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Authors: | V A Lyubochko N V Belousova P V Bondarev |
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Institution: | (1) Institute of Chemistry and Chemico-Metallurgical Processes, Siberian Branch of the Russian Academy of Sciences, 42, K. Marx St., 660049 Krasnoyarsk;(2) Joint-Stock Company “Institute of Technical Physics”, Russia |
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Abstract: | Consideration is given to the special features of the excitation of spectra of metals (Ag, Au, Fe, Hg, Pt, and Sb) that manifest
themselves in investigating spectral sources with combined glow discharge (glow discharge and capillary discharge). It is
established that the proposed method for introducing a substance into a plasma makes it possible to realize two fundamentally
different regimes: without evaporation and with complete evaporation and matrix atomization. It is shown that a spectral source
of combined glow discharge with a nonequilibrium plasma has significant advantages for the most important analytical characteristics
over quasi-equilibrium combined discharge at atmospheric pressure. The gold and platinum sensitivity in combined glow discharge
is 10−7%, and the reproducibility of spectral determinations is 0.001–0.100, depending on the measurement range. A fractional separation
of elements that makes it possible to analyze the phase composition of substances, particularly metals, with high sensitivity
is revealed in glow discharge.
Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 64, No. 2, pp. 143–147, March–April, 1997. |
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