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Title: 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:
 [1];  [2]
  1. Albuquerque, NM
  2. 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 = {2002},
month = {1}
}

Patent:

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