Method for detecting low concentration gas
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United States of America Patent
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Feb 5, 2013
Grant Date -
Nov 25, 2010
app pub date -
Nov 24, 2009
filing date -
May 22, 2009
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Disclosed is a method for detecting a low concentration gas. In the method, a measurand gas containing the target gas in a concentration of 50 ppm or less is supplied to an oscillation element which contains a quartz crystal resonator and a zeolite including a metal complex (such as a zeolite including a cobalt phthalocyanine complex) present on or above the quartz crystal resonator. The target gas is then detected through a change in resonance frequency of the quartz crystal resonator, the change being caused by the adsorption of the target gas by the metal-complex-including zeolite.
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