Reactive gas detection in complex backgrounds

Details Reactive gas detection in complex backgrounds Reactive gas detection in complex backgrounds

2010-04-19

2010-10-26

Hill, Jr., Robert J (Department: 1797)

Gas separation: processes

Solid sorption

C095S136000, C095S235000, C096S413000, C073S023200, C073S023210, C073S023230, C073S863000, C423S210000, C702S024000

Reexamination Certificate

active

07819946

ABSTRACT:
A differential absorption spectrum for a reactive gas in a gas mixture can be generated for sample absorption data by subtracting background absorption data set from the sample absorption data. The background absorption data can be characteristic of absorption characteristics of the background composition in a laser light scan range that includes a target wavelength. The differential absorption spectrum can be converted to a measured concentration of the reactive gas using calibration data. A determination can be made whether the background composition has substantially changed relative to the background absorption data, and new background absorption data can be used if the background composition has substantially changed. Related systems, apparatus, methods, and/or articles are also described.

REFERENCES:
patent: 2004/0034480 (2004-02-01), Binder
patent: 2006/0011844 (2006-01-01), Oka et al.

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