Method for detecting harmful gases which is applicable to broad

Chemistry: analytical and immunological testing – Inorganic acid or base – Halogen containing

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

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.

REFERENCES:
patent: 5018380 (1991-05-01), Zupancic et al.
patent: 5319975 (1994-06-01), Pederson et al.
patent: 5567622 (1996-10-01), Jaduszliwer et al.
Tagliatesta et al., Mol. Cryst. Liq. Cryst. Sci. Technol., Sect. A (1996), vol. 278, pp. 173-180.
Tanaka et al., J. Mater. Chem. (1996), vol. 6 No. 6, pp. 953-956.
Journal of Colloid and Interface Science, vol. 124, No. 1, pp. 146-155, Jul., 1988, R.B. Beswick, et al., "Optical Detection of Toxic Gases Using Fluorescent Porphyrin Langmuir-Blodgett Films".
Chemical Sensors (Proceedings of 20.sup.th Chemical Sensor Symposium), vol. 11, Supplement A, pp. 93-96, 1995, Yoshihiko Sadaoka, et al., "Optochemical HCl and CL.sub.2 Sensor Based on Immobilized Tetra(phenyl)porphyrinates".
Chemistry Letters, pp. 509-510, 1995, Yoshihiko Sadaoka, et al. "Optochemical HCl Gas Detection Based on Zinc Tetrabromotetraphenylporphyrin Dispersed in Ethyl Cellulose".
Chemistry Letters, pp. 907-908, 1995, Yoshihiko Sadaoka, et al. "Optochemical HCl Gas Detection Based on Tetraphenylporphine Dispersed in Ethyl Cellulose".
ICCOSS XII, 12.sup.th International Conference on the Cemistry of the Organic Solid State, Jul. 9-14, 1995, Okudogo, Matsuyama, Japan, Program and Abstracts, p. 146, Pietro Tagliatesta, et al., "Optochemical HCl and Cl.sub.2 Gas Detection Based on Tetraphenyl Dispersed in Ethylcellulose".
Proceedings of the 22.sup.nd Chemical Sensor Symposium, Apr. 3-4, 1996, Tokyo University of Agriculture and Technology, pp. 69-72, Kazunari Tanaka, et al., "Optochemical Acidic Gas Sensor Based on Tetraphenylporphyrinates Dispersed in Ethylcellulose".
2.sup.nd European Conference on Optical Chemical Sensors and Biosensors, Apr. 19-21, 1994, Book of Abstracts, p. 130, M.G. Baron, et al., "A Kineto-Optical Method for the Determination of Chlorine Gas".
Sensor and Actuators, vol. B29, Nos. 1-3, pp. 358-361, Oct., 1995, Proceedings of the 2.sup.nd European Conference on Optical Chemical Sensors and Biosensors, M.G. Baron, et al., "A Kineto-Optical Method for the Determination of Chlorine Gas".
Inorganic Chemistry, vol. 18, No. 1, pp. 201-206, 1979, A. Giraudeau et al. "Effects of Electron-Withdrawing Substituents on the Electrochemical Oxidation of Porphyrins".
Journal of the American Chemical Society, 101:14, pp. 3857-3862, Jul. 4, 1979, A. Giraudeau, et al. "Substituent Effects in the Electroreduction of Porphyrins and Metalloporphyrins".
Inorganic Chemistry, vol. 30, No.2, pp. 239-245, 1991, P. Bhyrappa et al., "Octabromotetraphenylporphyrin and Its Metal Derivatives: Electronic Structure and Electrochemical Properties".
Inorganic Chemistry, vol. 32, No. 19, pp. 4042-4048, 1993, F. D'Souza, et al., "Electrochemical and Spectroelectrochemical Behavior of Cobalt(III), Cobalt(II), and Cobalt(I) Complexes of meso-Tetraphenylporphyrinate Bearing Bromides on the beta-Pyrrole Positions".
Sensors and Actuators B, No. 18-19, pp. 493-496, 1994, A. Morales-Bahnik, et al., "An Optochemical Ammonia Sensor Based on Immobilized Metalloporphyrins".
Journal of Physics and Chemistry of Solids, vol. 49, No. 3, pp. 315-321, 1988, Colin L. Honeybourne, et al. "The Chemical Degradation of Gas-Sensing Meso-Tetra-Arlyporphin Thin Films by High Levels of Dinitrogen Tetroxide".
Sensors and Actuators B, No. 13-14, pp. 543-544, 1993, M.G. Baron, et al. "Optical Thin Films for Gas Sensing".
Sensors and Actuators B, No. 11, pp. 195-199, 1993, M. G. Baron, et al., "Luminescent Porphyrin Thin Films for NOX Sensing".

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Method for detecting harmful gases which is applicable to broad does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for detecting harmful gases which is applicable to broad , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for detecting harmful gases which is applicable to broad will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1509446

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.