Chemistry: analytical and immunological testing – Sulfur containing – Sulfur dioxide
Reexamination Certificate
2008-04-29
2011-11-01
Jarrett, Lore (Department: 1772)
Chemistry: analytical and immunological testing
Sulfur containing
Sulfur dioxide
C422S083000, C422S088000
Reexamination Certificate
active
08048682
ABSTRACT:
The present invention relates to a method for selectively detecting and/or measuring gaseous SO2at a temperature of at least 500° C., the method involving: (i) providing a SO2-detecting device including an oxygen ion-conducting substrate having on its surface at least three electrodes comprising a first, second, and third electrode; (ii) driving a starting current of specified magnitude and temporal variation between the first and second electrodes; (iii) contacting the SO2-detecting device with the SO2-containing sample while maintaining the magnitude and any temporal variation of the starting current, wherein said SO2-containing sample causes a change in the electrical conductance of said device; and (iv) detecting the change in electrical conductance of the device based on measuring an electrical property related to or indicative of the conductance of the device between the first and third electrodes, or between the second and third electrodes, and detecting SO2in the SO2-containing sample based on the measured change in electrical conductance.
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Armstrong Timothy R.
Montgomery Frederick C.
West David L.
Jarrett Lore
Scully, Scott, Muphy & Presser, P.C.
UT-Battelle LLC
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