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Title: 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):
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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 = {2005},
month = {6}
}

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Works referenced in this record:

Application of the Solubility Parameter Concept to the Design of Chemiresistor Arrays
journal, October 1999


Solid-Phase Microextraction. A Solvent-Free Alternative for Sample Preparation
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Differentiation of Chemical Components in a Binary Solvent Vapor Mixture Using Carbon/Polymer Composite-Based Chemiresistors
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Microporous Silica Prepared by Organic Templating:  Relationship between the Molecular Template and Pore Structure
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Integrated chemiresistor array for small sensor platforms
conference, August 2000