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Abstract

A simple method is described for the approximate measurement of the ion energy distribution in an inductively coupled plasma-mass spectrometer (ICP-MS) with a continuum flow sampling interface. The average ion kinetic energy, kinetic energy spread, and maximum kinetic energy are evaluated from a plot of ion signal as a function of retarding voltage applied to the quadrupole mass analyzer. The effects of plasma operating parameters on ion signals and energies are described. In particular, kinetic energy is a sensitive function of aerosol gas flow rate. This behavior is attributed to a nonthermal, possibly electrical, interaction between the plasma and the sampling interface, which is induced by the presence of the axial channel in the ICP.

Keywords

Mass spectrometry ICP

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References

Douglas

D. J.

and Houk

R. S.

, Prog. Anal. Atomic Spectrosc. 8, 1 (1985).

Houk

R. S.

Fassel

V. A.

, and Svec

H. J.

, Dynamic Mass Spectrom. 6, 234 (1981).

Gray

A. L.

and Date

A. R.

, Analyst 108, 1033 (1983).

Douglas

D. J.

and French

J. B.

, Spectrochim. Acta 48B, (1985), in press.

Franklin

J. L.

Studniarz

S. A.

, and Ghosh

P. K.

, J. Appl. Phys. 39, 2052 (1968).

Seguin

J. G.

Dugan

C. H.

, and Goodings

J. M.

, Int. J. Mass Spectrom. Ion Phys. 9, 203 (1972).

Rowe

, Int. J. Mass Spectrom. Ion Phys. 16, 209 (1975).

Darcie

T. E.

, M.S. Dissertation, University of Toronto, Toronto, Canada (1979).

Darcie

T. E.

, Institute for Aerospace Studies, University of Toronto, UTIAS Report No. 269 (1983).

10.

Olson

K. W.

Haas

W. J.

Jr. , and Fassel

V. A.

, Anal. Chem. 49, 632 (1977).

11.

Pertel

, Int. J. Mass Spectrom. Ion Phys. 16, 39 (1975).

12.

Trott

G. W.

and Benyon

J. H.

, Int. J. Mass Spectrom. Ion Phys. 31, 37 (1979).

13.

Scott

R. H.

Fassel

V. A.

Kniseley

R. N.

, and Nixon

D. E.

, Anal. Chem. 46, 75 (1974).

14.

French

J. B.

, Molecular Beams for Rarefied Gasdynamic Research, Nelson

W. C.

, Ed. (NATO-AGARD Fluid Dynamics Panel, 1966) AGARDograph 12, p. 19.

15.

Houk

R. S.

Svec

H. J.

, and Fassel

V. A.

, Appl. Spectrosc. 35, 380 (1981).

16.

Houk

R. S.

Montaser

, and Fassel

V. A.

, Appl. Spectrosc. 37, 425 (1983).

17.

Aeschbach

, Spectrochim. Acta 37B, 987 (1982).

18.

Blades

M. W.

and Hieftje

G. M.

, Spectrochim. Acta 37B, 191 (1982).

19.

Blades

M. W.

, Spectrochim. Acta 37B, 869 (1982).

20.

de Galan

, Spectrochim. Acta 39B, 537 (1984).

21.

Boumans

P. W. J. M.

and De Boer

F. J.

, Spectrochim. Acta 32B, 365 (1977).

22.

Robin

and de Lyon

, ICP Information Newsletter 4, 495 (1979).

23.

Fassel

V. A.

, Science 202, 183 (1978).

24.

Fassel

V. A.

and Kniseley

R. N.

, Anal. Chem. 46, 1110A (1974).

25.

Barnes

R. M.

, CRC Crit. Rev. Anal. Chem. 7, 203 (1978).

26.

Olivares

J. A.

and Houk

R. S.

, Anal. Chem. 57, (1985), in press.

Kinetic Energy Distributions of Positive Ions in an Inductively Coupled Plasma Mass Spectrometer

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