Apparatus and method of monitoring an analyte
First Claim
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1. A detector for monitoring a sample for the presence of an analyte comprising:
- a carrier having a thickness;
an analyte-sensing composition including an indicator dye, a buffer, and an osmotic control agent, the analyte-sensing composition being contained by the carrier and the buffer and indicator dye are present in a molar ratio of between 20 and 200;
a hydrophobic barrier on one surface of the carrier, the hydrophobic barrier being arranged to contact a test material, and an outer barrier covering a surface of the carrier opposite the hydrophobic barrier.
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Abstract
A detector for monitoring an analyte includes an analyte-sensing composition. The analyte-sensing composition has a visible color intensity or emission intensity (e.g., fluorescence intensity) that changes as the analyte concentration contacting the detector changes. The intensity changes can be visible to the human eye, or identified by an instrument. The analyte can include carbon dioxide, a volatile amine or a volatile carboxylic acid.
93 Citations
27 Claims
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1. A detector for monitoring a sample for the presence of an analyte comprising:
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a carrier having a thickness;
an analyte-sensing composition including an indicator dye, a buffer, and an osmotic control agent, the analyte-sensing composition being contained by the carrier and the buffer and indicator dye are present in a molar ratio of between 20 and 200;
a hydrophobic barrier on one surface of the carrier, the hydrophobic barrier being arranged to contact a test material, and an outer barrier covering a surface of the carrier opposite the hydrophobic barrier. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A detector for monitoring a sample for the presence of an analyte comprising:
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a carrier of less than 0.5 mm;
an analyte-sensing composition including an indicator dye selected from the group consisting of an emissive dye or a colored dye, a buffer, and an osmotic control agent including an alcohol, the analyte-sensing composition being contained by the carrier and the buffer and indicator dye are present in a molar ratio of between 20 and 200;
a hydrophobic barrier on one surface of the carrier, the hydrophobic barrier being arranged to contact a test material, the hydrophobic barrier including a hydrophobic silane coating, a fluorocarbon coating, or a laminated hydrophobic sheet, and an outer barrier covering a surface of the carrier opposite the hydrophobic barrier, the outer barrier being impermeable to water and gases and is transparent to visible light, wherein the analyte is carbon dioxide, a volatile carboxylic acid or a volatile amine. - View Dependent Claims (22, 23, 24, 25, 26, 27)
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Specification