Two-stage preconcentrator for vapor/particle detection
Abstract
A device for concentrating particles from a high volume gas stream and delivering the particles for detection in a low volume gas stream includes first and second preconcentrators. The first preconcentrator has a first structure for retaining particles in a first gas flow path through which a first gas flows at a relatively high volume, valves for selectively stopping the first gas flow; and a second gas flow path through which gas flows at an intermediate flow volume for moving particles from the first structure. The second preconcentrator includes a second structure for retaining particles in the second gas flow path; a valve for selectively stopping the second gas flow; and a third gas flow path through which gas flows at a low volume for moving particles from the second structure to a detector. Each of the particle retaining structures is preferably a metal screen that may be resistively heated by application of an electric potential to release the particles.
- Inventors:
-
- Albuquerque, NM
- Tijeras, NM
- Issue Date:
- Research Org.:
- Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
- OSTI Identifier:
- 874231
- Patent Number(s):
- 6345545
- Assignee:
- Sandia Corporation (Albuquerque, NM)
- Patent Classifications (CPCs):
-
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:
- two-stage; preconcentrator; vaporparticle; detection; device; concentrating; particles; volume; gas; stream; delivering; preconcentrators; structure; retaining; flow; path; flows; valves; selectively; stopping; intermediate; moving; valve; third; detector; particle; structures; metal; screen; resistively; heated; application; electric; potential; release; gas stream; gas flow; flow path; electric potential; particle detection; /73/
Citation Formats
Linker, Kevin L, and Brusseau, Charles A. Two-stage preconcentrator for vapor/particle detection. United States: N. p., 2002.
Web.
Linker, Kevin L, & Brusseau, Charles A. Two-stage preconcentrator for vapor/particle detection. United States.
Linker, Kevin L, and Brusseau, Charles A. Tue .
"Two-stage preconcentrator for vapor/particle detection". United States. https://www.osti.gov/servlets/purl/874231.
@article{osti_874231,
title = {Two-stage preconcentrator for vapor/particle detection},
author = {Linker, Kevin L and Brusseau, Charles A},
abstractNote = {A device for concentrating particles from a high volume gas stream and delivering the particles for detection in a low volume gas stream includes first and second preconcentrators. The first preconcentrator has a first structure for retaining particles in a first gas flow path through which a first gas flows at a relatively high volume, valves for selectively stopping the first gas flow; and a second gas flow path through which gas flows at an intermediate flow volume for moving particles from the first structure. The second preconcentrator includes a second structure for retaining particles in the second gas flow path; a valve for selectively stopping the second gas flow; and a third gas flow path through which gas flows at a low volume for moving particles from the second structure to a detector. Each of the particle retaining structures is preferably a metal screen that may be resistively heated by application of an electric potential to release the particles.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jan 01 00:00:00 EST 2002},
month = {Tue Jan 01 00:00:00 EST 2002}
}