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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 1) a conventional solid-phase microextraction (SPME) fiber, 2) a SPME fiber suspended in a capillary tube (with means provided for moving gases through the capillary tube so that the gases come into close proximity to the suspended fiber), and 3) 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 materialsmore » 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.« less

Inventors:
 [1];  [2]
  1. Albuquerque, NM
  2. Bosque Farms, NM
Issue Date:
Research Org.:
Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
OSTI Identifier:
874515
Patent Number(s):
6405608
Assignee:
Sandia Corporation (Albuquerque, NM)
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:
method; apparatus; optimized; sampling; volatilizable; target; substances; capturing; gases; soil; gas; analytes; emanations; explosive; materials; residues; employs; principles; sorption; common; solid; phase; microextraction; conjunction; analysis; means; chromatograph; sorb; functions; sorptive; structures; capture; analyte; depending; embodiment; conventional; solid-phase; spme; fiber; suspended; capillary; tube; provided; moving; close; proximity; including; interior; surface; material; similar; supported; disclosed; structure; associated; enclosure; communication; region; potentially; contaminated; buried; unexploded; ordnance; pass; accumulate; sorbed; heating; microwave; horns; drive; liquid; components; liquid phase; interior surface; tube including; /73/

Citation Formats

Lindgren, Eric R, and Phelan, James M. Method and apparatus for optimized sampling of volatilizable target substances. United States: N. p., 2002. 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/874515.
@article{osti_874515,
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 1) a conventional solid-phase microextraction (SPME) fiber, 2) a SPME fiber suspended in a capillary tube (with means provided for moving gases through the capillary tube so that the gases come into close proximity to the suspended fiber), and 3) 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 = {2002},
month = {1}
}

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Works referenced in this record:

Trace Explosives Signatures from World War II Unexploded Undersea Ordnance
journal, May 1998


Application of Solid-Phase Microextraction to the Recovery of Organic Explosives
journal, January 1998


Headspace solid-phase microextraction
journal, July 1993