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Title: Method and apparatus for optimized sampling of volatilizable target substances

Abstract

An apparatus for capturing, from gases such as soil gas, target analytes. Target analytes may include emanations from explosive materials or from residues of explosive materials. The apparatus employs principles of sorption common to solid phase microextraction, and is best used in conjunction with analysis means such as a gas chromatograph. To sorb target analytes, the apparatus functions using various sorptive structures to capture target analyte. Depending upon the embodiment, those structures may include a capillary tube including an interior surface on which sorptive material (similar to that on the surface of a SPME fiber) is supported (along with means for moving gases through the capillary tube so that the gases come into close proximity to the sorptive material). In one disclosed embodiment, at least one such sorptive structure is associated with an enclosure including an opening in communication with the surface of a soil region potentially contaminated with buried explosive material such as unexploded ordnance. Emanations from explosive materials can pass into and accumulate in the enclosure where they are sorbed by the sorptive structures. Also disclosed is the use of heating means such as microwave horns to drive target analytes into the soil gas from solid and liquidmore » phase components of the soil.« less

Inventors:
;
Issue Date:
Research Org.:
Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1175065
Patent Number(s):
6802227
Application Number:
10/025,510
Assignee:
Sandia Corporation
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
F - MECHANICAL ENGINEERING F41 - WEAPONS F41H - ARMOUR
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Lindgren, Eric R., and Phelan, James M. Method and apparatus for optimized sampling of volatilizable target substances. United States: N. p., 2004. Web.
Lindgren, Eric R., & Phelan, James M. Method and apparatus for optimized sampling of volatilizable target substances. United States.
Lindgren, Eric R., and Phelan, James M. Tue . "Method and apparatus for optimized sampling of volatilizable target substances". United States. https://www.osti.gov/servlets/purl/1175065.
@article{osti_1175065,
title = {Method and apparatus for optimized sampling of volatilizable target substances},
author = {Lindgren, Eric R. and Phelan, James M.},
abstractNote = {An apparatus for capturing, from gases such as soil gas, target analytes. Target analytes may include emanations from explosive materials or from residues of explosive materials. The apparatus employs principles of sorption common to solid phase microextraction, and is best used in conjunction with analysis means such as a gas chromatograph. To sorb target analytes, the apparatus functions using various sorptive structures to capture target analyte. Depending upon the embodiment, those structures may include a capillary tube including an interior surface on which sorptive material (similar to that on the surface of a SPME fiber) is supported (along with means for moving gases through the capillary tube so that the gases come into close proximity to the sorptive material). In one disclosed embodiment, at least one such sorptive structure is associated with an enclosure including an opening in communication with the surface of a soil region potentially contaminated with buried explosive material such as unexploded ordnance. Emanations from explosive materials can pass into and accumulate in the enclosure where they are sorbed by the sorptive structures. Also disclosed is the use of heating means such as microwave horns to drive target analytes into the soil gas from solid and liquid phase components of the soil.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2004},
month = {10}
}

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