Fiber optic chemical sensors incorporating electrostatic coupling
First Claim
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1. A fiber optic chemical sensor for monitoring at least one parameter of a fluid, comprising:
- an optical fiber waveguide having a distal end portion;
a chemical sensor at said distal end portion said chemical sensor having an anionic hydrogel matrix membrane adhered to said distal end portion of the optical fiber waveguide;
cationic ion exchange resin material dispersed within said anionic matrix membrane; and
an anionic colorimetric indicator component electrostatically coupled to said cationic ion exchange resin material.
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Abstract
Fiber optic chemical sensors and materials suitable for use in making same are provided. A charged hydrogel matrix membrane is suitable for affixing to the distal end portion and the like of an optical fiber waveguide, which charged hydrogel matrix has dispersed therewithin an oppositely charged ion exchange resin powder, which ion exchange powder has a colorimetric indicator component electrostatically coupled thereto, which colorimetric indicator component has the same charge as the charged hydrogel.
162 Citations
19 Claims
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1. A fiber optic chemical sensor for monitoring at least one parameter of a fluid, comprising:
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an optical fiber waveguide having a distal end portion; a chemical sensor at said distal end portion said chemical sensor having an anionic hydrogel matrix membrane adhered to said distal end portion of the optical fiber waveguide; cationic ion exchange resin material dispersed within said anionic matrix membrane; and an anionic colorimetric indicator component electrostatically coupled to said cationic ion exchange resin material. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A fiber optic chemical sensor for monitoring at least one parameter of a fluid, comprising:
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an optical fiber waveguide having a distal end portion; a chemical sensor at said distal end portion, said chemical sensor having a cationic hydrogel matrix membrane adhered to said distal end portion of the optical fiber waveguide; anionic ion exchange resin material dispersed within said cationic matrix membrane; and a cationic indicator component electrostatically coupled to said anionic ion exchange resin material. - View Dependent Claims (9, 10, 11, 12)
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13. A fiber optic chemical sensor for monitoring at least one parameter of a fluid, comprising:
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an optical fiber waveguide having a distal end portion; a chemical sensor at said distal end portion, said chemical sensor having a charged hydrogel matrix membrane adhered to said distal end portion of the optical fiber waveguide; ion exchange resin material dispersed within said charged hydrogel matrix membrane, said ion exchange resin material having a charge opposite to that of said charged hydrogel matrix membrane; and a colorimetric indicator component electrostatically coupled to said ion exchange resin material, said colorimetric indicator component having the same charge as said charged hydrogel matrix material. - View Dependent Claims (14, 15, 16, 17)
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18. A process for making a fiber optic chemical sensor for monitoring at least one parameter of a fluid, comprising:
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providing a charged ion exchange resin material in powdered form; electrostatically coupling by mixing said powdered ion exchange resin material with a solution of a colorimetric indicator component having a charge opposite to the charge of the charged ion exchange resin powder in order to thereby form a stained ion exchange material which is said ion exchange resin powder electrostatically bound to said colorimetric indicator; mixing a charged hydrogen component with said stained ion exchange material, said charged hydrogel component having a charge the same as that of said colorimetric indicator component and opposite to that of the ion exchange material in order to thereby provide an optrode composition of said stained ion exchange material dispersed in said charged hydrogel component; and affixing said optrode composition to a distal portion of an optical fiber waveguide. - View Dependent Claims (19)
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Specification