Purge and trap concentrator with sparge vessel

Details Purge and trap concentrator with sparge vessel Purge and trap concentrator with sparge vessel

2011-05-13

2011-11-22

Hill, Jr., Robert J (Department: 1777)

Chemistry: analytical and immunological testing

Including sample preparation

Gaseous sample or with change of physical state

C436S054000, C436S174000, C422S068100, C422S083000, C422S089000, C073S023200, C073S023350, C073S023410, C073S023420

Reexamination Certificate

active

08062905

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.

REFERENCES:
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patent: 6395560 (2002-05-01), Markelov
patent: 2004/0142481 (2004-07-01), Hartlein

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