05834626 is referenced by 51 patents and cites 62 patents.

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.

Title
Colorimetric indicators for breath, air, gas and vapor analyses and method of manufacture
Application Number
8/758557
Publication Number
5834626
Application Date
November 29, 1996
Publication Date
November 10, 1998
Inventor
Douglas R Malat
P.O. Box 638, Hampton Bays, 11946
NY, US
Emory S De Castro
60 Little Nahant Rd., Nahant, 01908-0128
MA, US
Agent
Harvey Lunenfeld
Alfred M Walker
IPC
G01N 1/22
G01N 27/62
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