Chemistry: analytical and immunological testing – Including sample preparation
Reexamination Certificate
2011-05-31
2011-05-31
Hill, Jr., Robert J (Department: 1777)
Chemistry: analytical and immunological testing
Including sample preparation
C436S181000, C436S161000, C073S023200, C073S023350, C073S023410, C073S023420
Reexamination Certificate
active
07951609
ABSTRACT:
A purge and trap concentrator system that includes a sparge vessel, and includes a variable gas flow valve for controlling the gas pressure in an analytic trap or the sparge vessel; a sensor that detects both a foaming sample state and a high liquid level in the sparge vessel, using one optical sensor; a control scheme that re-directs the purge gases to a second inlet of the sparge vessel during a foaming condition; a control scheme that uses a split flow to enhance the quantity of sample gases passed from an analytic trap; an electrically powered thermal energy source with a fan raising the sparge vessel temperature via thermal convection.
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EST Analytical, Inc.
Gerido Dwan A
Gribbell Frederick H.
Hill, Jr. Robert J
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