Mass spectrometer

Details Mass spectrometer Mass spectrometer

1987-01-29

1988-07-26

Anderson, Bruce C.

Radiant energy

Ionic separation or analysis

With sample supply means

250281, H01J 4904

Patent

active

047602538

ABSTRACT:
The invention provides a mass spectrometer adapted for the elemental analysis of a sample in which ions are formed from the sample in an inductively coupled plasma (ICP). The flame of the plasma (14) is directed against the front surface (30) of a cone (19), and ions are sampled from the plasma through a hole (16) in the apex of the cone. In order to reduce the intensity of the background mass spectra, the rear surface (32) of the inside of the cone is polished to a surface finish of 5 microns or better, at least in the vicinity of the hole.

REFERENCES:
Gray, A. L., Int. J. Mass Spectrom. and Ion Phys., 1983, vol. 46, pp. 7-10.
Date, A. R., Int. J. Mass Spectrom. and Ion Phys., 1983, vol. 48, pp. 357-360.
Date, A. R., The Analyst, 1983, vol. 108, pp. 159-165.
Olivares, J. A., Analytical Chemistry, 1985, vol. 57, pp. 2674-2679.
European Spectroscopy News, 1982, vol. 43.
Gray, A. L., Dynamic Mass Spectroscopy, vol. 6, ch. 20.
Houk, Fassel et al., Analytical Chemistry, 1980, vol. 52, p. 2283.
Gray, A. L., The Analyst, 1983, vol. 108, pp. 1033-1050.
Date, A. R., Spectrochimica Acta B 1983, vol. 38B, pts. 1 & 2, pp. 29-37.

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