Chlorine dioxide monitor based on ion mobility spectrometry with selective dopant chemistry
US5283199A · kind A · utility
58Cited by
14References
44Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 18, 1991 |
| Grant date | Feb 1, 1994 |
| Priority date | — |
| Expiry date | Oct 18, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/24
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.