System and method for preconcentrating, identifying, and quantifying chemical and biological substances
- Antioch, CA
- San Ramon, CA
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.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- DOE Contract Number:
- W-7405-ENG-48
- Assignee:
- Regents of University of California (Oakland, CA)
- Patent Number(s):
- US 6134944
- OSTI ID:
- 873325
- Country of Publication:
- United States
- Language:
- English
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Monitoring of NH3 gas by LB polypyrrole-based SAW sensor
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journal | April 1998 |
Development of a saw gas sensor for monitoring so2 gas
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journal | January 1998 |
Studies on a surface acoustic wave (SAW) dosimeter sensor for organophosphorous nerve agents
|
journal | May 1997 |
SAW NOx gas sensor using WO3 thin-film sensitive coating
|
journal | June 1997 |
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Related Subjects
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
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