Colorimetric indicators for breath, air, gas and vapor analyses and method of manufacture
First Claim
1. A colorimetric indicator for breath, air, gas, and vapor analyses, comprising:
- a housing having at least one inlet for passage of said breath, air, gas, and vapor into said housing and at least one outlet for passage of said breath, air, gas, and vapor out of said housing;
a first chemical reactant within said housing in contact with said breath, air, gas, and vapor passing therethrough for indicating directly when a fixed volumetric quantity of said breath, air, gas, and vapor has passed through said housing; and
a second chemical reactant within said housing in contact with said breath, air, gas, and vapor passing therethrough for indicating directly whether a predetermined threshold amount of a predetermined analyte has been reached during passage of said fixed volumetric quantity of breath, air, gas, and vapor.
0 Assignments
0 Petitions
Accused Products
Abstract
Colorimetric indicators for breath, air, gas, & vapor analyses that can be thrown away after a single use, are easy to use, low cost, small, and simple to manufacture for indicating at least volume passed through the colorimetric indicators and may also be used to indicate concentration of an analyte within breath, air, gas, & vapor passed through the colorimetric indicators. The present invention is directed to colorimetric indicators for breath, air, gas, & vapor analyses. The colorimetric indicators may have a housing with an entrance port, an outlet, a volume indicator, and an analyte indicating reagent. The volume indicator may be a breath volume reagent. Different analytes may be measured, the analyte indicating reagent depending upon the particular analyte being to monitored. The breath volume indicator is colorimetric, and changes color when a predetermined volume of air is passed through the colorimetric indicators for breath, air, gas, & vapor analyses. The analyte indicator reagent is also colorimetric, and changes color when a predetermined amount of chemical concentration of the analyte is exposed to the analyte indicator reagent. A process for manufacturing a colorimetric indicator for breath, air, gas, and vapor analyses, comprises at least the following steps: immobilizing a reagent, such color change inducing reagent being composed of at least one constant concentration component.
191 Citations
42 Claims
-
1. A colorimetric indicator for breath, air, gas, and vapor analyses, comprising:
-
a housing having at least one inlet for passage of said breath, air, gas, and vapor into said housing and at least one outlet for passage of said breath, air, gas, and vapor out of said housing; a first chemical reactant within said housing in contact with said breath, air, gas, and vapor passing therethrough for indicating directly when a fixed volumetric quantity of said breath, air, gas, and vapor has passed through said housing; and a second chemical reactant within said housing in contact with said breath, air, gas, and vapor passing therethrough for indicating directly whether a predetermined threshold amount of a predetermined analyte has been reached during passage of said fixed volumetric quantity of breath, air, gas, and vapor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
-
Specification