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Instruments Sniff Organic Surface ContaminantsPortable instruments detecting both nonvolatile and volatile organic surface contaminants in real time developed. Instruments easy to use: operate under ordinary ambient atmospheric conditions, without need to use messy liquid solvents or install and remove witness plates, and without need to cut specimens from surfaces to be inspected. Principle of detection involves sweeping pure, activated gas across surface spot inspected, then monitoring light emitted at wavelengths characteristic of excited molecules formed by chemical reactions between activated gas and contaminants. Gas activated by dc discharge, radio-frequency induction, microwave radiation, laser beam, hot filaments, or any other suitable means that excites some of gas molecules.
Document ID
19950065226
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Adler-Golden, Steven
(Spectral Sciences, Inc.)
Matthew, Michael W.
(Spectral Sciences, Inc.)
Date Acquired
August 17, 2013
Publication Date
February 1, 1995
Publication Information
Publication: NASA Tech Briefs
Volume: 19
Issue: 2
ISSN: 0145-319X
Subject Category
Physical Sciences
Report/Patent Number
KSC-11660
Accession Number
95B10067
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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