Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Means for analyzing gas sample
Reexamination Certificate
2005-06-07
2005-06-07
Warden, Jill (Department: 1743)
Chemical apparatus and process disinfecting, deodorizing, preser
Analyzer, structured indicator, or manipulative laboratory...
Means for analyzing gas sample
C422S050000, C422S051000, C422S082010, C422S082020, C422S051000, C422S067000, C422S068100, C422S069000, C422S088000, C422S098000, C436S043000, C436S174000, C436S178000, C073S001010, C073S001020, C073S023200, C073S053010, C029S592000, C029S592100
Reexamination Certificate
active
06902701
ABSTRACT:
A chemical-sensing apparatus is formed from the combination of a chemical preconcentrator which sorbs and concentrates particular volatile organic chemicals (VOCs) and one or more chemiresistors that sense the VOCs after the preconcentrator has been triggered to release them in concentrated form. Use of the preconcentrator and chemiresistor(s) in combination allows the VOCs to be detected at lower concentration than would be possible using the chemiresistor(s) alone and further allows measurements to be made in a variety of fluids, including liquids (e.g. groundwater). Additionally, the apparatus provides a new mode of operation for sensing VOCs based on the measurement of decay time constants, and a method for background correction to improve measurement precision.
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Hughes Robert C.
Jenkins Mark W.
Kottenstette Richard
Manginell Ronald P.
Patel Sanjay V.
Hohimer John P.
Sandia Corporation
Sines Brian
Warden Jill
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