Vapor phase sensor

Details Vapor phase sensor Vapor phase sensor

1995-11-21

1996-08-13

Bell, Bruce F.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204424, 204431, 422 83, 422 84, 422 98, G01N 2726

Patent

active

055452990

ABSTRACT:
On the bottom face of a measurement section, measurement electrodes and a reference electrode are formed and a solution supply pipe is opened. Then, if a predetermined electrolytic solution is supplied from the solution supply pipe, the electrolytic solution can be held on an electrolytic solution holding surface on the lower end of the measurement section, utilizing the with surface tension thereof for providing a gas reception portion. Since the electrolytic solution is exposed directly to the air, substances in a vapor phase (particularly, odor substances) are diffused into the electrolytic solution, causing an electric state to change. The substances in the vapor phase can be detected by detecting the electric state change. The electrolytic solution held on the lower face of the measurement section can be updated by further supplying more electrolytic solution.

REFERENCES:
patent: 3824168 (1974-07-01), Oswin et al.
patent: 5239258 (1983-08-01), Kauffman
Slater, Jonathan, M., et al. "Examination of Ammonia-Poly (pyrrole) Interactions by Piezoelectric and Conductivity Measurements", Analyst, Nov. 1991, vol. 116., pp. 1125-1131.
Slater, Jonathan, M., et al. "Gas and Vapour Detection With Poly (pyrrole) Gas Sensors", Analyst, Aug. 1992, vol. 117, pp. 1265-1271.
Slater, Jonathan, M., et al. "Multi-layer Conducting Polymer Gas Sensor Arrays for Olfactory Sensing", Analyst, Apr. 1993, vol. 118, pp. 379-384.
Hartnett, Margaret, et al. "Detector Based on Charge Coupled Device Technology", Analytical Proceedings, Feb. 1992, vol. 29, pp. 52-57.

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