Method and apparatus for improving the specificity of an ion mob

Details Method and apparatus for improving the specificity of an ion mob Method and apparatus for improving the specificity of an ion mob

1991-04-17

1992-03-10

Anderson, Bruce C.

Radiant energy

Ionic separation or analysis

Methods

250286, 250287, 250288, B01D 5944, H01J 4940

Patent

active

050952064

ABSTRACT:
An improved ion mobility spectrometer (IMS) and method for operating the same which enables analysis of a specific acid gas analyte in a mixture of such gases when air is used as the carrier gas and the drift gas in the IMS. A controlled concentration of sulfur dioxide dopant is added to the air carrier gas stream prior to application of the carrier gas stream. In the IMS, the drift times of the ions generated from the doped air carrier gas differ from the drift times of the ions generated from the acid gas analyte, thereby enabling identification and quantification of the analyte.

REFERENCES:
patent: 3717028 (1973-02-01), Annino et al.
patent: 4390784 (1983-06-01), Browning et al.
patent: 4445038 (1984-04-01), Spangler et al.
patent: 4797554 (1989-01-01), Blanchard et al.
patent: 4839143 (1989-06-01), Vora et al.

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