skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: System and method for preconcentrating, identifying, and quantifying chemical and biological substances

Abstract

A system and method for preconcentrating, identifying, and quantifying chemical and biological substances is disclosed. An input valve directs a first volume of a sample gas to a surface acoustic wave (SAW) device. The SAW device preconcentrates and detects a mass of a substance within the sample gas. An output valve receives a second volume of the sample gas containing the preconcentrated substance from the SAW device and directs the second volume to a gas chromatograph (GC). The GC identifies the preconcentrated substance within the sample gas. A shunt valve exhausts a volume of the sample gas equal to the first volume minus the second volume away from the SAW device and the GC. The method of the present invention includes the steps of opening an input valve for passing a first volume of a sample gas to a SAW device; preconcentrating and detecting a mass of a substance within the sample gas using the SAW device; opening an output valve for passing a second volume of the sample gas containing the preconcentrated substance to a gas chromatograph (GC); and then identifying the preconcentrated substance within the sample gas using the GC.

Inventors:
 [1];  [2]
  1. (Antioch, CA)
  2. (San Ramon, CA)
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
873325
Patent Number(s):
6134944
Assignee:
Regents of University of California (Oakland, CA) LLNL
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; preconcentrating; identifying; quantifying; chemical; biological; substances; disclosed; input; valve; directs; volume; sample; gas; surface; acoustic; wave; device; preconcentrates; detects; mass; substance; output; receives; containing; preconcentrated; chromatograph; gc; identifies; shunt; exhausts; equal; minus; steps; passing; detecting; biological substance; surface acoustic; acoustic wave; gas containing; sample gas; gas chromatograph; biological substances; quantifying chemical; input valve; /73/

Citation Formats

Yu, Conrad M., and Koo, Jackson C. System and method for preconcentrating, identifying, and quantifying chemical and biological substances. United States: N. p., 2000. Web.
Yu, Conrad M., & Koo, Jackson C. System and method for preconcentrating, identifying, and quantifying chemical and biological substances. United States.
Yu, Conrad M., and Koo, Jackson C. Sat . "System and method for preconcentrating, identifying, and quantifying chemical and biological substances". United States. https://www.osti.gov/servlets/purl/873325.
@article{osti_873325,
title = {System and method for preconcentrating, identifying, and quantifying chemical and biological substances},
author = {Yu, Conrad M. and Koo, Jackson C.},
abstractNote = {A system and method for preconcentrating, identifying, and quantifying chemical and biological substances is disclosed. An input valve directs a first volume of a sample gas to a surface acoustic wave (SAW) device. The SAW device preconcentrates and detects a mass of a substance within the sample gas. An output valve receives a second volume of the sample gas containing the preconcentrated substance from the SAW device and directs the second volume to a gas chromatograph (GC). The GC identifies the preconcentrated substance within the sample gas. A shunt valve exhausts a volume of the sample gas equal to the first volume minus the second volume away from the SAW device and the GC. The method of the present invention includes the steps of opening an input valve for passing a first volume of a sample gas to a SAW device; preconcentrating and detecting a mass of a substance within the sample gas using the SAW device; opening an output valve for passing a second volume of the sample gas containing the preconcentrated substance to a gas chromatograph (GC); and then identifying the preconcentrated substance within the sample gas using the GC.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {1}
}

Patent:

Save / Share: