CO.sub.2 sensor using a hydrophilic polyurethane matrix and proc

Details CO.sub.2 sensor using a hydrophilic polyurethane matrix and proc CO.sub.2 sensor using a hydrophilic polyurethane matrix and proc

1992-12-11

1994-07-05

Housel, James C.

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Means for analyzing liquid or solid sample

422 8203, 422 8204, 422 8207, 436 68, 385123, 4273897, 4274072, 427387, G01N 2100, G01N 3350

Patent

active

053265319

ABSTRACT:
The carbon dioxide sensor includes a CO.sub.2 sensing matrix formed from a hydrophilic, gas permeable, cross-linked polyurethane. The polyurethane matrix is formed from a polyurethane pre-polymer mixture which cross links when mixed with an aqueous carbon dioxide buffer solution. The dye-buffer solution is physically entrapped as a homogeneous dispersion in the polymer matrix. The matrix is applied to the exposed glass core of an optical fiber, which may first be coated with a primer to allow the polyurethane matrix to bond firmly to the tip of the optical fiber. The hydrophilic polymeric matrix is preferably coated with a hydrophobic material to help avoid leaching of the dye from the matrix, and to prevent diffusion of hydronium ions into the sensing matrix. The hydrophobic polymer overcoat may thereafter be cured by heat treatment. The hydrophobic coating may also contain a light reflective material such as TiO.sub.2.

REFERENCES:
patent: 31879 (1985-05-01), Lubbers et al.
patent: 3114610 (1963-12-01), Gafford et al.
patent: 3453136 (1969-07-01), Bylsma
patent: 3754867 (1973-08-01), Guenther
patent: 3904373 (1975-09-01), Harper
patent: 4194877 (1980-03-01), Peterson
patent: 4200110 (1980-04-01), Peterson et al.
patent: 4321057 (1982-03-01), Buckles
patent: 4399099 (1983-08-01), Buckles
patent: 4456542 (1984-06-01), Wagner et al.
patent: 4468229 (1984-08-01), Su
patent: 4476870 (1984-10-01), Peterson et al.
patent: 4509522 (1985-04-01), Manuccia et al.
patent: 4514037 (1985-04-01), Bishop et al.
patent: 4522465 (1985-06-01), Bishop et al.
patent: 4534355 (1985-08-01), Potter
patent: 4548907 (1985-10-01), Seitz et al.
patent: 4557900 (1985-12-01), Heitzmann
patent: 4560248 (1985-12-01), Cramp et al.
patent: 4568518 (1986-02-01), Wolfbeis et al.
patent: 4587101 (1986-05-01), Marsoner et al.
patent: 4608344 (1986-08-01), Carter et al.
patent: 4657736 (1987-04-01), Marsoner et al.
patent: 4712865 (1987-12-01), Hsu et al.
patent: 4714770 (1987-12-01), Hsu et al.
patent: 4737343 (1988-04-01), Hirschfeld
patent: 4752115 (1988-06-01), Murray, Jr. et al.
patent: 4798738 (1989-01-01), Yafuso et al.
patent: 4816130 (1989-03-01), Karakelle et al.
patent: 4824789 (1989-04-01), Yafuso et al.
patent: 4830924 (1989-05-01), Dallavia, Jr.
patent: 4833091 (1989-05-01), Leader et al.
patent: 4842783 (1989-06-01), Blaylock
patent: 4849172 (1989-07-01), Yafuso et al.
patent: 4851195 (1989-06-01), Matthews et al.
patent: 4854321 (1989-08-01), Boiarski
patent: 4867919 (1989-09-01), Yafuso et al.
patent: 4886338 (1989-12-01), Yasufo et al.
patent: 4906249 (1990-03-01), Fogt et al.
patent: 4919891 (1990-04-01), Yasufo et al.
patent: 4921589 (1990-05-01), Yates et al.
patent: 4925268 (1990-05-01), Iyer et al.
patent: 4928694 (1990-05-01), Maxwell
patent: 4934369 (1990-06-01), Maxwell
patent: 4943364 (1990-07-01), Koch et al.
patent: 4954318 (1990-09-01), Yafuso et al.
patent: 4999306 (1991-03-01), Yasufo et al.
patent: 5047208 (1991-09-01), Schweitzer et al.
patent: 5081041 (1992-01-01), Yafuso et al.
patent: 5081042 (1992-01-01), Yasufo et al.
patent: 5098659 (1992-03-01), Yim et al.
patent: 5114676 (1992-05-01), Leiner et al.
patent: 5120510 (1992-06-01), Gourley et al.
patent: 5139601 (1992-08-01), Holmes-Farley et al.
Vurek, NTIS publ. 1983, PB83-189738 "Fiber-Optic Carbon Dioxide Partial Pressure Sensor".
G. G. Vurek et al., Ann. Biomed. Eng. 1983, 11, 499-510 "A Fiber Optic PCO.sub.2 Sensor".
Z. Zhujun et al., Anal. Chim. Acta 1984, 160, 305-309 "A Carbon Dioxide Sensor Based on Fluorescence".
W. W. Miller et al., Clin. Chem. 1987, 1538-1542 "Performance of an In-Vivo, Continuous Blood-Gas Monitor with Disposable Probe".
O. S. Wolfbeis et al., Anal. Chem. 1988, 60, 2028-2030 "Fiber-Optic Fluorosensor for Oxygen and Carbon Dioxide".
C. Munkholm et al., Talanta 1988, 109-112 "A Fiber-Optic Sensor for CO.sub.2 Measurement".
S. J. Barker et al., Anesth Analg. 1989, 68, S1-S321 "Fiberoptic Intraarterial pHa, PaO2, and PaCO2 in the Operating Room".
H. K. Hui et al., SPIE vol. 1172 Chemical, Biochemical, and Environmental Sensors 1989, 1172, 233-237 "An Accurate, Low-Cost, Easily-Manufacturable Oxygen Sensor".
Kawabata et al., Anal. Chim. Acta, 1989, 219, 233 "Fiber-Optic Sensor for Carbon Dioxide with a pH Indicator Dispersed in a Poly (Ethylene Glycol) Membrane".

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