Apparatus for sensing volatile organic chemicals in fluids
Abstract
A chemical-sensing apparatus is formed from the combination of a chemical preconcentrator which sorbs and concentrates particular volatile organic chemicals (VOCs) and one or more chemiresistors that sense the VOCs after the preconcentrator has been triggered to release them in concentrated form. Use of the preconcentrator and chemiresistor(s) in combination allows the VOCs to be detected at lower concentration than would be possible using the chemiresistor(s) alone and further allows measurements to be made in a variety of fluids, including liquids (e.g. groundwater). Additionally, the apparatus provides a new mode of operation for sensing VOCs based on the measurement of decay time constants, and a method for background correction to improve measurement precision.
- Inventors:
- Issue Date:
- Research Org.:
- Sandia National Lab. (SNL-CA), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1175378
- Patent Number(s):
- 6902701
- Application Number:
- 09/974,327
- Assignee:
- Sandia Corporation
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- DOE Contract Number:
- AC04-94AL85000
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 47 OTHER INSTRUMENTATION; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Citation Formats
Hughes, Robert C., Manginell, Ronald P., Jenkins, Mark W., Kottenstette, Richard, and Patel, Sanjay V. Apparatus for sensing volatile organic chemicals in fluids. United States: N. p., 2005.
Web.
Hughes, Robert C., Manginell, Ronald P., Jenkins, Mark W., Kottenstette, Richard, & Patel, Sanjay V. Apparatus for sensing volatile organic chemicals in fluids. United States.
Hughes, Robert C., Manginell, Ronald P., Jenkins, Mark W., Kottenstette, Richard, and Patel, Sanjay V. Tue .
"Apparatus for sensing volatile organic chemicals in fluids". United States. https://www.osti.gov/servlets/purl/1175378.
@article{osti_1175378,
title = {Apparatus for sensing volatile organic chemicals in fluids},
author = {Hughes, Robert C. and Manginell, Ronald P. and Jenkins, Mark W. and Kottenstette, Richard and Patel, Sanjay V.},
abstractNote = {A chemical-sensing apparatus is formed from the combination of a chemical preconcentrator which sorbs and concentrates particular volatile organic chemicals (VOCs) and one or more chemiresistors that sense the VOCs after the preconcentrator has been triggered to release them in concentrated form. Use of the preconcentrator and chemiresistor(s) in combination allows the VOCs to be detected at lower concentration than would be possible using the chemiresistor(s) alone and further allows measurements to be made in a variety of fluids, including liquids (e.g. groundwater). Additionally, the apparatus provides a new mode of operation for sensing VOCs based on the measurement of decay time constants, and a method for background correction to improve measurement precision.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jun 07 00:00:00 EDT 2005},
month = {Tue Jun 07 00:00:00 EDT 2005}
}
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