Chlorine dioxide monitor based on ion mobility spectrometry with

Details Chlorine dioxide monitor based on ion mobility spectrometry with Chlorine dioxide monitor based on ion mobility spectrometry with

1991-10-18

1994-02-01

Alexander, Lyle A.

Chemistry: analytical and immunological testing

Nuclear magnetic resonance, electron spin resonance or other...

436124, 422 8201, 422 83, 422 98, 250282, 250286, 250287, 250288, G01N 2400, B01D 5944

Patent

active

052831990

ABSTRACT:
An improved ion mobility spectrometer (IMS) and method for operating the same which enables analysis of chlorine dioxide in a mixture of gases which also includes the interferant chlorine. A controlled concentration of an amine such as methylamine is added to the air carrier gas stream prior to application of the carrier gas stream. The amine suppresses the chlorine peak, thereby improving the specificity of the IMS to chlorine dioxide. The IMS of the present invention also includes an improved membrane filter for pre-filtering chlorine, and a software algorithm for accommodating peak drift.

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Bacon et al.; "Detection of HF Using Atmospheric Pressure Ionization (API) and Ion Mobility Spectrometry (IMS)"; Jun. 3, 1990.

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