Analyzer with variable volume ballast chamber and method of...

Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Means for analyzing liquid or solid sample

Reexamination Certificate

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Reexamination Certificate

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07070738

ABSTRACT:
An analyzer having a combustion furnace includes a gas flow stream including a combustion detector in the stream of byproducts of combustion and a variable volume ballast chamber for receiving byproducts of combustion and which has a movable piston which moves in response to the introduced combustion byproducts. Subsequently, an aliquot sample from the chamber is forced through detectors for elements being detected. The method of analysis incorporating the present invention includes filling a variable volume ballast chamber with byproducts of combustion until combustion completion has been detected and, subsequently, forcing at least an aliquot sample of the combustion byproducts from the variable volume ballast chamber into a flow path including detectors for the elements of interest.

REFERENCES:
patent: 3698869 (1972-10-01), Condon
patent: 4525328 (1985-06-01), Bredeweg
patent: 4527436 (1985-07-01), Jones
patent: 4573910 (1986-03-01), Bredeweg
patent: 4622009 (1986-11-01), Bredeweg
patent: 4627267 (1986-12-01), Cohrs et al.
patent: 5563339 (1996-10-01), Compton et al.
patent: 6207460 (2001-03-01), Kishkovich et al.
patent: 6270727 (2001-08-01), Mitchell et al.
patent: 6291802 (2001-09-01), Ford
patent: 6623699 (2003-09-01), Pack et al.
Instrumental Organic Elemental Analysis, 1977, “1. The Perkin-Elmer Model 240 Elemental Analyzer: Carbon, Hydrogen and Nitrogen” M. R. Cottrell and f. H. Cottrell.

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