Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Means for analyzing liquid or solid sample
Patent
1990-09-24
1992-03-24
Warden, Robert J.
Chemical apparatus and process disinfecting, deodorizing, preser
Analyzer, structured indicator, or manipulative laboratory...
Means for analyzing liquid or solid sample
422 8206, 128634, 358 12, 427 2, G01N 2100, A61B 500
Patent
active
050986597
ABSTRACT:
A CO.sub.2 /O.sub.2 or pH/O.sub.2 gas sensor comprising a single optical fiber and a method for making the same. The optical fiber carries light signals at different wavelengths for monitoring either CO.sub.2 concentration or pH level, in combination with O.sub.2 concentration. Attached to the distal end of the fiber-optic probe is a cylindrical pellet that has one surface covered by a light reflective material (gold foil) and the other surface attached adjacent to the distal end of the optical fiber. Depending on whether the sensor is to monitor either CO.sub.2 or pH, the pellet comprises either a CO.sub.2 analyte indicator molecule or a pH analyte indicator molecule covalently bonded to a polymer matrix material. Also adjacent to the distal end of the optical fiber is disposed a second polymer matrix material which is codissolved with an O.sub.2 analyte reactive indicator molecule. The second polymer matrix material is either interposed between the cylindrical pellet and the distal end of the optical fiber or surrounds the cylindrical pellet. If pH is being measured, the distal end of the optical fiber is coated with a hydrophilic material that is permeable to water. Conversely, if CO.sub.2 is being monitored, the distal end is coated with a hydrophobic material.
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Huss Bradley D.
Khalil Gamal-Eddin
Pihl Roger J.
Vurek Gerald G.
Yim Jeffrey B.
Abbott Laboratories
Trembley Theresa A.
Warden Robert J.
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