Chemistry: analytical and immunological testing – Rate of reaction determination
Patent
1997-05-13
1998-12-15
Soderquist, Arlen
Chemistry: analytical and immunological testing
Rate of reaction determination
422 59, 422 60, 422 86, 422 87, 422 88, 436 44, 436121, 436134, 436164, G01N 3300, G01N 2100
Patent
active
058495916
ABSTRACT:
The invention is directed to a method for determining the portion of a gaseous or vaporous component in a gas mixture utilizing a detecting substance which can enter into a chemical reaction with the component to produce a coloration of the detecting substance and utilizing a device for evaluating the coloration. The method includes the steps of: passing the gas mixture at a constant volume flow through a channel containing the detecting substance; detecting a reflectance signal I(t) within a defined spatially fixed length segment of the channel; determining a slope .DELTA.I/.DELTA.t at the start of the chemical reaction during a time interval .DELTA.t in which the detecting substance is present in excess; determining a saturation reflectance signal I.sup.100% toward the end of the chemical reaction which corresponds to an almost complete chemical conversion of the detecting substance within the length segment; and, determining a normalized slope in correspondence to the formal relationship: .DELTA.I/(I.sup.100% *.DELTA.t), which is proportional to the portion of the gaseous or vaporous component.
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Bather Wolfgang
Kaneblei Ingo
Martens Matthias
Mohrmann Andreas
Pooch Ingo
Dragerwerk Aktiengesellschaft
Ottesen Walter
Soderquist Arlen
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