Experimental and theoretical study of the manifestation of the main background single- harge arid ions ArM+ in the inductively coupled plasma mass spectrometry method

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Abstract

Single-charge background argid ions ArH+, ArN+, ArO+ and Ar2+ create very strong spectral interference in elemental and isotope analysis by inductively coupled plasma mass spectrometry (ICP-MS). The behavior of these basic background argid ions under ICP-MS conditions is experimentally investigated depending on the high-frequency plasma power and the velocity of the argon transporting stream. Theoretically, the behavior of these argid ions has been studied by thermodynamic modeling with varying plasma temperature and velocity of the transporting argon stream. The general patterns of changes in the intensity of the main background argid ions and the efficiency of their formation with varying operational parameters of inductively coupled plasma are noted. A good coincidence of the experimental and theoretical dependences obtained has been achieved.

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About the authors

A. A. Pupyshev

Ural Federal University

Author for correspondence.
Email: pupyshev@gmail.com

Department of Physical and Chemical Methods of Analysis, Institute of Physics and Technology

Russian Federation, Yekaterinburg, 620062

P. V. Zaitseva

Ural Federal University; Institute of Metallurgy, Ural Branch of Russian Academy of Sciences

Email: pupyshev@gmail.com

Department of Physical and Chemical Methods of Analysis, Institute of Physics and Technology

Russian Federation, Yekaterinburg, 620062; Yekaterinburg, 620016

M. Yu. Burylin

Kuban State University

Email: pupyshev@gmail.com

Analytical Chemistry Department, Faculty of Chemistry and High Technologies

Russian Federation, Krasnodar, 350040

A. G. Abakumov

Kuban State University

Email: pupyshev@gmail.com

Analytical Chemistry Department, Faculty of Chemistry and High Technologies

Russian Federation, Krasnodar, 350040

P. G. Abakumov

Kuban State University

Email: pupyshev@gmail.com

Analytical Chemistry Department, Faculty of Chemistry and High Technologies

Russian Federation, Krasnodar, 350040

References

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Supplementary files

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2. Fig. 1. Experimental change in the logarithms of the intensity I(X+) (imp/s) of the main background ions of the ICP (corrected, except for H+, for the effect of ion mass discrimination) depending on the speed of the transporting argon flow VAr (l/min) and the high-frequency plasma power W, W: 1 – 800, 2 – 1000, 3 – 1200, 4 – 1400.

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3. Fig. 2. Experimental change in the logarithms of the efficiency of formation of the main background argide ions of the ICP I(ArM+)/I(M+) depending on the speed of the transporting argon flow VAr (l/min) and the high-frequency plasma power, W: 1 – 800, 2 – 1000, 3 – 1200, 4 – 1400.

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4. Fig. 3. Calculated change in the logarithms of the concentration (cm–3) of the main background neutral particles n(X) and their ions n(X+) in the ICP depending on the temperature T (K) at different flow rates of the transporting argon flow VAr, l/min: (a), (b) – 0.22; (c), (d) – 1.0.

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5. Fig. 4. Calculated change in the logarithms of the concentration (cm–3) of the main background neutral argon-containing particles n(X) and their ions n(X+) in the ICP depending on the temperature T(K) at different flow rates of the transporting argon flow VAr, l/min: (a), (b) – 0.22; (c), (d) – 1.0.

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6. Fig. 5. Calculated change in the logarithms of the efficiency of formation of the main background argon ions n(ArM+)/n(M+) (ppm) in the ICP depending on the temperature T (K) at different flow rates of the transporting argon flow VAr, l/min: (a) – 0.22; (b) – 1.0.

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