Inlet heating device for ion mobility spectrometer

Details Inlet heating device for ion mobility spectrometer Inlet heating device for ion mobility spectrometer

1996-04-04

1998-06-09

Anderson, Bruce

Radiant energy

Ionic separation or analysis

With sample supply means

250286, B01D 5944, H01J 4900

Patent

active

057638764

ABSTRACT:
Generally, the present invention provides a device for heating the sample stream inlet of an ion mobility spectrometry (IMS) sensor. The heating device increases the temperature of the sample stream inlet surface to reduce the amount of time between adsorption and desorption taking place on the surface. This greatly improves the ability of the IMS sensor to follow rapidly changing analyte concentration levels. An alternate preferred embodiment of the present invention provides a flow smoothing device for decreasing the turbulence present in the fluid flow entering the IMS sensor's carrier stream inlet. This flow smoothing insert permits increasing the fluid flow rate entering the IMS sensor's carrier stream inlet to levels which maximize the IMS sensor's measurement sensitivity without causing mixing of the sample and carrier fluid stream flows.

REFERENCES:
patent: 4732046 (1988-03-01), Lawrence et al.
patent: 5037611 (1991-08-01), Ledford
patent: 5218203 (1993-06-01), Eisele et al.
patent: 5420424 (1995-05-01), Carnahan et al.
patent: 5567938 (1996-10-01), Mimura et al.
patent: 5611846 (1997-03-01), Overton et al.
patent: 5663560 (1997-09-01), Sakairi et al.

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