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Title: Tortuous path chemical preconcentrator

Abstract

A non-planar, tortuous path chemical preconcentrator has a high internal surface area having a heatable sorptive coating that can be used to selectively collect and concentrate one or more chemical species of interest from a fluid stream that can be rapidly released as a concentrated plug into an analytical or microanalytical chain for separation and detection. The non-planar chemical preconcentrator comprises a sorptive support structure having a tortuous flow path. The tortuosity provides repeated twists, turns, and bends to the flow, thereby increasing the interfacial contact between sample fluid stream and the sorptive material. The tortuous path also provides more opportunities for desorption and readsorption of volatile species. Further, the thermal efficiency of the tortuous path chemical preconcentrator is comparable or superior to the prior non-planar chemical preconcentrator. Finally, the tortuosity can be varied in different directions to optimize flow rates during the adsorption and desorption phases of operation of the preconcentrator.

Inventors:
 [1];  [1];  [1];  [1];  [2]
  1. Albuquerque, NM
  2. Cedar Crest, NM
Issue Date:
Research Org.:
Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1014661
Patent Number(s):
7799280
Application Number:
US Patent Application 11/355,480
Assignee:
Sandia Corporation (Albuquerque, NM)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01L - CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Country of Publication:
United States
Language:
English

Citation Formats

Manginell, Ronald P, Lewis, Patrick R, Adkins, Douglas R, Wheeler, David R, and Simonson, Robert J. Tortuous path chemical preconcentrator. United States: N. p., 2010. Web.
Manginell, Ronald P, Lewis, Patrick R, Adkins, Douglas R, Wheeler, David R, & Simonson, Robert J. Tortuous path chemical preconcentrator. United States.
Manginell, Ronald P, Lewis, Patrick R, Adkins, Douglas R, Wheeler, David R, and Simonson, Robert J. Tue . "Tortuous path chemical preconcentrator". United States. https://www.osti.gov/servlets/purl/1014661.
@article{osti_1014661,
title = {Tortuous path chemical preconcentrator},
author = {Manginell, Ronald P and Lewis, Patrick R and Adkins, Douglas R and Wheeler, David R and Simonson, Robert J},
abstractNote = {A non-planar, tortuous path chemical preconcentrator has a high internal surface area having a heatable sorptive coating that can be used to selectively collect and concentrate one or more chemical species of interest from a fluid stream that can be rapidly released as a concentrated plug into an analytical or microanalytical chain for separation and detection. The non-planar chemical preconcentrator comprises a sorptive support structure having a tortuous flow path. The tortuosity provides repeated twists, turns, and bends to the flow, thereby increasing the interfacial contact between sample fluid stream and the sorptive material. The tortuous path also provides more opportunities for desorption and readsorption of volatile species. Further, the thermal efficiency of the tortuous path chemical preconcentrator is comparable or superior to the prior non-planar chemical preconcentrator. Finally, the tortuosity can be varied in different directions to optimize flow rates during the adsorption and desorption phases of operation of the preconcentrator.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2010},
month = {9}
}

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Works referenced in this record:

Recent advancements in the gas-phase MicroChemLab
conference, December 2004


Nanoporous-carbon films for microsensor preconcentrators
journal, May 2002