Rapid-response reversible dry surface CO 2 detector

Details Rapid-response reversible dry surface CO 2 detector Rapid-response reversible dry surface CO 2 detector

2005-03-23

2009-08-25

Gakh, Yelena G (Department: 1797)

Chemical apparatus and process disinfecting, deodorizing, preser

Analyzer, structured indicator, or manipulative laboratory...

Calorimeter

C422S051000, C422S051000

Reexamination Certificate

active

07578971

ABSTRACT:
Compositions for CO2detector solutions and rapid-response reversible dry surface CO2detectors made from them are disclosed. The CO2detector solutions generally comprise a poly(oxyethylene) based compound, a pH sensitive indicator dye, an organic solvent, a cationic phase transfer agent and an anionic base. However, minimally these detector solutions comprise a poly(oxyethylene) based compound, a pH sensitive indicating dye, an organic solvent and a base. The solutions were embedded onto a solid support made of polyethersulfone filter material in order to form rapid-response reversible dry surface CO2detectors. Rapid-response reversible dry surface CO2detectors are produced which function at rates in excess of 180 one-way color changes/minute when exposed to alternating 0% and 5% CO2concentrations. A preferred embodiment using cationic methyltricaprylylammonium in conjunction with the phenoxide anion is substantially humidity resistant.

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