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Title: Method and apparatus for detection of chemical vapors

Abstract

The present invention is a gas detector and method for using the gas detector for detecting and identifying volatile organic and/or volatile inorganic substances present in unknown vapors in an environment. The gas detector comprises a sensing means and a detecting means for detecting electrical capacitance variance of the sensing means and for further identifying the volatile organic and volatile inorganic substances. The sensing means comprises at least one sensing unit and a sensing material allocated therein the sensing unit. The sensing material is an ionic liquid which is exposed to the environment and is capable of dissolving a quantity of said volatile substance upon exposure thereto. The sensing means constitutes an electrochemical capacitor and the detecting means is in electrical communication with the sensing means.

Inventors:
 [1];  [1];  [1]
  1. Knoxville, TN
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN
Sponsoring Org.:
USDOE
OSTI Identifier:
909369
Patent Number(s):
7,217,354
Application Number:
10/652,452
Assignee:
UT-Battelle, LLC (Oak Ridge, TN) ORO
DOE Contract Number:
AC05-00OR22725
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Mahurin, Shannon Mark, Dai, Sheng, and Caja, Josip. Method and apparatus for detection of chemical vapors. United States: N. p., 2007. Web.
Mahurin, Shannon Mark, Dai, Sheng, & Caja, Josip. Method and apparatus for detection of chemical vapors. United States.
Mahurin, Shannon Mark, Dai, Sheng, and Caja, Josip. Tue . "Method and apparatus for detection of chemical vapors". United States. doi:. https://www.osti.gov/servlets/purl/909369.
@article{osti_909369,
title = {Method and apparatus for detection of chemical vapors},
author = {Mahurin, Shannon Mark and Dai, Sheng and Caja, Josip},
abstractNote = {The present invention is a gas detector and method for using the gas detector for detecting and identifying volatile organic and/or volatile inorganic substances present in unknown vapors in an environment. The gas detector comprises a sensing means and a detecting means for detecting electrical capacitance variance of the sensing means and for further identifying the volatile organic and volatile inorganic substances. The sensing means comprises at least one sensing unit and a sensing material allocated therein the sensing unit. The sensing material is an ionic liquid which is exposed to the environment and is capable of dissolving a quantity of said volatile substance upon exposure thereto. The sensing means constitutes an electrochemical capacitor and the detecting means is in electrical communication with the sensing means.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue May 15 00:00:00 EDT 2007},
month = {Tue May 15 00:00:00 EDT 2007}
}

Patent:

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  • A method is given for determining the concentration of gases, especially organic gases, in the rare gas stream issuing from a chromatographic column by means of ioniza tion. Ionizing radiation is applied to the rare gas to produce long-lived metastable excited atoms which thereupon ionizes the organic gas. The ionized organic gas may be measured in an ionization chamber or by means of a discontinuous spark discharge. Detectors for carrying out the method are described. (D.L.C.)
  • The method of detecting predetermined organic halogen compounds in a gas comprising the steps of directing a sample of said gas into a reaction chamber containing immobilized therein a halogen compound in which the halogen constituent is radioactive, providing environmental conditions in said chamber to promote a chemical reaction whereby said radioactive constituent forms a mobile compound with a constituent of said organic halogen compound, and passing said sample including any of said mobile compound generated out of said reaction chamber and into the presence of a radiation detector.
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