Method and device for the introduction of ions into the gas stre

Details Method and device for the introduction of ions into the gas stre Method and device for the introduction of ions into the gas stre

1996-05-30

1998-05-05

Anderson, Bruce

Radiant energy

Ionic separation or analysis

With sample supply means

250282, B01D 5944, H01J 4900

Patent

active

057477990

ABSTRACT:
The invention relates to methods and devices for the efficient threading in of ions, which have been generated in a gas volume, into the suctioning air stream of an aperture, the diameter of which is small in comparison to the extent of the gas volume. The aperture can be an introductory aperture for ions into the vacuum system of a mass spectrometer, or however the end aperture of a capillary which transfers ions into the vacuum of the mass spectrometer. The invention consists of an electrical drawing field for generating the ions, the lines of force of which point to the edge of the aperture or into the aperture itself and allow the ions, directed by the field, to migrate through the ambient gas to the aperture. The field-guided migration of the ions through the gas is known as "ion mobility". Near the aperture, the ions are caught by the suctioning gas stream and entrained into the aperture by viscous friction. Due to the field-guided migration, the ions can be transferred in this way from a zone with a complex gas mixture into one with a pure gas.

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patent: 5103093 (1992-04-01), Sakairi et al.
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patent: 5432343 (1995-07-01), Gulcicek et al.
patent: 5523566 (1996-06-01), Fuerstenau et al.

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