Influence of non-ionogenic pav on the intensity of metal lines in drop-spark discharge spectra

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Multiple amplification of metal lines in the emission spectrum of drop-spark discharge was found when non-ionogenic surfactants are introduced into the sample. The effect occurs at the content of Triton X-100 more than 1 % and persists up to 35 wt.% The degree of enhancement depends on the concentration of the background electrolyte, reaching two orders of magnitude for highly dilute acids (e.g., 10 mM HCl). In the presence of 1.5 wt.% Triton X-100, an order of magnitude decrease in the detection limits of Cu, Cs, Mg, Li and Pb is observed.

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Sobre autores

А. Zhirkov

Vernadsky Institute of Geochemistry and Analytical Chemistry, RAS

Autor responsável pela correspondência
Email: vdomah@gmail.com
Rússia, Moscow

V. Yagov

Vernadsky Institute of Geochemistry and Analytical Chemistry, RAS

Email: vdomah@gmail.com
Rússia, Moscow

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2. Fig. 1. Intensities of lines of some metals in the spectra of drop-spark discharge (a) in the absence and (b) in the presence of 1.5 wt.% Triton X-100 with varying concentration of background electrolyte. Concentrations of metals, μg/ml: Li — 0.9, Cs — 6, Ga — 3.5, Mg — 6, Cd — 28, Cu — 16, Pb — 50.

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3. Fig. 2. Intensities of lines of some metals in the spectra of drop-spark discharge with varying concentration of Triton X-100. Background electrolyte - 10 mM HCl. Concentrations of metals, μg/ml: Li - 0.9, Cs - 6, Ga - 3.5, Mg - 6, Cd - 28, Cu - 16, Pb - 50.

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4. Fig. 3. Intensities of lines of some metals in the spectra of drop-spark discharge with varying concentration of Triton X-100. Background electrolyte - 120 mM HCl. Concentrations of metals, μg/ml: Li - 0.9, Cs - 6, Ga - 3.5, Mg - 6, Cd - 28, Cu - 16, Pb - 50.

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