Chemistry: analytical and immunological testing – Optical result – With fluorescence or luminescence
Reexamination Certificate
2006-03-13
2009-08-04
Warden, Jill (Department: 1797)
Chemistry: analytical and immunological testing
Optical result
With fluorescence or luminescence
C436S127000, C436S164000, C422S051000, C422S082050, C422S082070, C422S082080, C422S082110, C422S083000, C422S084000, C422S085000
Reexamination Certificate
active
07569395
ABSTRACT:
An apparatus and non-invasive method of measuring oxygen by exciting a luminescent compound disposed in a container and then measuring the intensity of the light emitted by the excited luminescent compound as it relaxes to the ground state. A plot of emission intensity as a function of time results in an exponential decay curve the area of which is inversely proportional to the oxygen concentration. The oxygen concentration can be determined over a wide temperature range by measuring the temperature of the container and the emission intensity and then applying the following equation:in-line-formulae description="In-line Formulae" end="lead"?[O2]=(ATa(T)2+BTa(T)+CTa)(tau)2+(ATb(T)2+BTb(T)+CTb)(tau)+(ATc(T)2+BTc(T)+CTc)in-line-formulae description="In-line Formulae" end="tail"?T is the measured temperature;tau is the area of the exponential decay curve; andATa, BTa, CTa, ATb, BTb, CTb, ATc, BTc, and CTcare coefficients that are specific to the luminescent compound being examined.
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Austin Darrell Carl
Havens Marvin Russell
Paul Douglas James
Alston & Bird LLP
Cryovac Inc.
Turk Neil
Warden Jill
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