Chemistry: analytical and immunological testing – Inorganic acid or base – Halogen containing
Patent
1996-10-09
1999-09-14
Ludlow, Jan
Chemistry: analytical and immunological testing
Inorganic acid or base
Halogen containing
436100, 436124, 436127, 436163, 436164, 436167, 436171, G01N 3116, G01N 2178, G01N 2179, G01N 2180
Patent
active
059522372
ABSTRACT:
The present invention provides a method by which harmful trace gases in a gaseous mixture containing as such harmful halogen gases, halogenated hydrogen gases, acid gases, oxidizing gases, basic gases, organic acid gases, especially halogen gases or halogenated hydrogen gases, are detected by using tetraphenylporphyrin (TPP) and quantitated from a calibration curve constructed therefrom, where the range of detectable concentration is made adjustable so that harmful gas can be detected and quantitated over a broad range of concentration. Furthermore, this invention also provides a method for extending the accessible range of gas concentration by adjusting the sensitivity of the detector material via control of tetraphenylporphyrin concentration in matrix polymer of the detector material, by controlling the gas concentration range via measurement at a specific wavelength(s), and by the use of a plurality of detector materials with pre-set assay sensitivity.
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Igarashi Chiaki
Sadaoka Yoshihiko
Tanaka Kazunari
Ebara Corporation
Ludlow Jan
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