Methods, devices, systems, and compositions for detecting gases
First Claim
Patent Images
1. A composition comprising:
- a dye present in an amount of about 0.001% to about 0.1% by weight of the composition;
a buffer present in an amount of about 0.5% to about 10% by weight of the composition;
an alkaline material present in an amount of about 0.1% to about 10% by weight of the composition;
a nitrogen containing compound configured to provide an increase in a colorific response present in an amount of about 0.01% to about 2% by weight of the composition; and
a water-attractive component present in an amount of about 5% to about 50% by weight of the composition.
1 Assignment
0 Petitions
Accused Products
Abstract
A method of monitoring a respiratory stream can be provided by monitoring color change of a color change material to determine a CO2 level of the respiratory stream in contact with the color change material by emitting visible light onto the color change material. Related devices, systems, and compositions are also disclosed.
-
Citations
21 Claims
-
1. A composition comprising:
-
a dye present in an amount of about 0.001% to about 0.1% by weight of the composition; a buffer present in an amount of about 0.5% to about 10% by weight of the composition; an alkaline material present in an amount of about 0.1% to about 10% by weight of the composition; a nitrogen containing compound configured to provide an increase in a colorific response present in an amount of about 0.01% to about 2% by weight of the composition; and a water-attractive component present in an amount of about 5% to about 50% by weight of the composition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
-
18. A composition comprising:
-
metacresol purple present in an amount of about 0.001% to about 0.1% by weight of the composition; a buffer present in an amount of about 0.5% to about 10% by weight of the composition; an alkaline material comprising a carbonate, the alkaline material present in an amount of about 0.1% to about 10% by weight of the composition; monoethanolamine present in an amount of about 0.01% to about 2% by weight of the composition; and a water-attractive component present in an amount of about 5% to about 50% by weight of the composition. - View Dependent Claims (19, 20)
-
-
21. A carbon dioxide indicator comprising:
-
a color change material comprising a substrate and a color change composition that is in contact with at least a portion of said substrate, wherein said color change material is responsive to carbon dioxide; and a control material, wherein said control material is substantially non-responsive to carbon dioxide, wherein said substrate comprises filter paper and said color change material comprises; metacresol purple present in an amount of about 0.001% to about 0.1% by weight of the composition; a buffer present in an amount of about 0.5% to about 10% by weight of the composition; an alkaline material comprising a carbonate, the alkaline material present in an amount of about 0.1% to about 10% by weight of the composition; monoethanolamine present in an amount of about 0.01% to about 2% by weight of the composition; and a water-attractive component present in an amount of about 5% to about 50% by weight of the composition.
-
Specification