Calibration system and technique for photoluminescent oxygen sensors with zero point maintained with a metal-air battery
First Claim
1. A calibration set for use in calibrating an optical oxygen sensor, comprising (i) a first mass of an oxygen sensitive photoluminescent dye retained within a hermetically sealed space so as to isolate the dye from environmental oxygen and thereby define a permeation rate of oxygen from the surrounding air into the sealed space, and in fluid communication with an activated metal-air battery whereby any oxygen in the hermetically sealed space is consumed by the battery, and (ii) a second mass of an oxygen sensitive photoluminescent dye in fluid communication with fluid having an environmental concentration of oxygen.
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Abstract
A calibration device and method of using the device to calibrate an analytical instrument capable of reading a photoluminescent oxygen probe. The device includes at least (a) a first mass of an oxygen sensitive photoluminescent dye retained within a hermetically sealed space so as to isolate the dye from environmental oxygen, and in fluid communication with an activated metal-air battery whereby any oxygen permeating into the hermetically sealed space is quickly consumed by the battery, and (b) a second mass of an oxygen sensitive photoluminescent dye in fluid communication with an environmental concentration of oxygen.
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Citations
36 Claims
- 1. A calibration set for use in calibrating an optical oxygen sensor, comprising (i) a first mass of an oxygen sensitive photoluminescent dye retained within a hermetically sealed space so as to isolate the dye from environmental oxygen and thereby define a permeation rate of oxygen from the surrounding air into the sealed space, and in fluid communication with an activated metal-air battery whereby any oxygen in the hermetically sealed space is consumed by the battery, and (ii) a second mass of an oxygen sensitive photoluminescent dye in fluid communication with fluid having an environmental concentration of oxygen.
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11. The calibration set of claim wherein the battery continuously powers a load having a resistance of at least 1,000,000 ohms, whereby the battery is effective for continuously scavenging oxygen from the hermetically sealed space containing the first mass of photoluminescent dye.
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26. A calibration set for use in calibrating an analytical instrument capable of reading a photoluminescent oxygen probe from which the concentration of oxygen in a sample communicating with the probe can be determined, wherein the probe comprises an oxygen-sensitive photoluminescent dye embedded within an oxygen-permeable carrier matrix, the calibration set comprising:
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(a) a first probe, comprising an oxygen-sensitive photoluminescent dye embedded within an oxygen-permeable carrier matrix, isolated from environmental oxygen and in fluid communication with an activated metal-air battery effective for scavenging oxygen from the first probe, whereby the concentration of oxygen in communication with the first probe can be reduced and maintained near zero, and (b) a second probe, comprising an oxygen-sensitive photoluminescent dye embedded within in oxygen-permeable carrier matrix, in fluid communication with an environmental concentration of oxygen. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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Specification