Reservoir fiber optic chemical sensors
First Claim
1. A reservoir cell assembly for a fiber optic chemical sensor, comprising:
- a modular cell body having a predetermined length and enclosing a predetermined volume and having two open ends;
a semipermeable membrane positioned at one open end of the cell body;
quick attach membrane retainer means which fit securely to one open end of the cell body to hold the membrane in place so that a predetermined chemical species may selectively diffuse through the membrane into the cell;
quick attach fiber optic connector means which fit securely to the other end of the cell body to hold the fiber optic positioned with its tip extending through the connector means into the cell body.
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Accused Products
Abstract
A reservoir fiber optic chemical sensor (FOCS) is formed of a modular cell body. A fiber optic is attached using a quick connect standard fiber optic connector. A semipermeable membrane is attached at the opposite end of the cell body using a quick attach membrane retainer. Multiple sensors can be made uniformly. Specific sensors for TCE vapor, O2 and CO2 are produced by utilizing a suitable reaction chemistry in the cell. A non-imaging optical focusing element can be included in the cell to increase sensitivity. A reaction cell can be placed adjacent to the reservoir cell with the semi-permeable membrane separating the two cells to produce a photolysis FOCS. TOC and TOCl can be detected with the photolysis FOCS.
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Citations
20 Claims
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1. A reservoir cell assembly for a fiber optic chemical sensor, comprising:
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a modular cell body having a predetermined length and enclosing a predetermined volume and having two open ends; a semipermeable membrane positioned at one open end of the cell body; quick attach membrane retainer means which fit securely to one open end of the cell body to hold the membrane in place so that a predetermined chemical species may selectively diffuse through the membrane into the cell; quick attach fiber optic connector means which fit securely to the other end of the cell body to hold the fiber optic positioned with its tip extending through the connector means into the cell body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A photolysis fiber optic chemical sensor apparatus, comprising:
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a sensor assembly comprising; a reservoir cell filled with a reagent solution reactive with predetermined photolysis products; a reaction cell adjacent to the reservoir cell; a semipermeable membrane separating the reservoir cell from the reaction cell, which is permeable to the predetermined photolysis products; a light source which produces light of a predetermined wavelength; means for transmitting light of the predetermined wavelength into the reaction cell to photolyze a predetermined species in a sample placed in the reaction to produce the predetermined photolysis products; means for detecting reaction of the predetermined photolysis products with the reagent solution in the reservoir cell.
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Specification