CA2285153A1 - Materials and apparatus for the detection of contraband - Google Patents

Materials and apparatus for the detection of contraband Download PDF

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Publication number
CA2285153A1
CA2285153A1 CA002285153A CA2285153A CA2285153A1 CA 2285153 A1 CA2285153 A1 CA 2285153A1 CA 002285153 A CA002285153 A CA 002285153A CA 2285153 A CA2285153 A CA 2285153A CA 2285153 A1 CA2285153 A1 CA 2285153A1
Authority
CA
Canada
Prior art keywords
trap
desorber
inlet
detector
fabric
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002285153A
Other languages
French (fr)
Other versions
CA2285153C (en
Inventor
Anthony Jenkins
William J. Mcgann
Joseph Napoli
Kevin Perry
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rapiscan Systems Inc
Original Assignee
Ion Track Instruments LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=22293742&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2285153(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Ion Track Instruments LLC filed Critical Ion Track Instruments LLC
Publication of CA2285153A1 publication Critical patent/CA2285153A1/en
Application granted granted Critical
Publication of CA2285153C publication Critical patent/CA2285153C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/30—Controlling by gas-analysis apparatus
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
    • G01N1/2205—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling with filters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/62—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode
    • G01N27/622—Ion mobility spectrometry
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
    • G01N1/2214—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling by sorption
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N2001/022—Devices for withdrawing samples sampling for security purposes, e.g. contraband, warfare agents
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N2001/022—Devices for withdrawing samples sampling for security purposes, e.g. contraband, warfare agents
    • G01N2001/024—Devices for withdrawing samples sampling for security purposes, e.g. contraband, warfare agents passengers or luggage
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N2001/028—Sampling from a surface, swabbing, vaporising
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
    • G01N2001/222—Other features
    • G01N2001/2223—Other features aerosol sampling devices

Abstract

Sample traps or wipes are provided for a detection system for detecting contraband materials. The sample trap is formed from an open weave glass fabric coated with a thin layer of Teflon and roughened to cut through the surface of Teflon and to break some of the glass fibers. Alternatively, the sample trap is non-woven felt fabric made of high temperature polyamide fiber. The sample traps are used in a detector, such as an ion trap mobility spectrometer. The detector includes a desorber which feeds dry air from a manifold above and below the sample trap through a series of holes along the mouth of the desorber. The dry air passes through the trap and purges out unwanted atmospheric constituents that could otherwise affect the performance of the detector. The purged air passes to the outside atmosphere, thus creating a dry curtain at the entry to the desorber.

Claims (23)

1. A sample trap for a detection apparatus, said sample trap being formed from an open weave fiberglass fabric coated with a layer of PTFE sufficiently thin to leave open spaces between woven fibers of the fiberglass.
2. The sample trap of claim 1, wherein the coated fabric is roughened sufficiently to cut through the PTFE at a plurality of locations on said trap.
3. The sample trap of claim 2, wherein the coated fabric is roughened sufficiently to break a plurality of the fibers such that short broken fibers project from the fabric for acting as a scrubbing material to pick up small particles of material to be detected by the detection apparatus.
4. A sample trap for use with a detection apparatus, the sample trap being a non-woven fabric made of a fiber material selected from the group consisting of a high temperature polyamide fiber and a stainless steel fiber, said fabric having a thickness of less than 3 mm.
5. A detector apparatus having a detector for detecting trace amounts of materials of interest carried into the detector through a detector inlet on a stream of air, the detector apparatus comprising a desorber having an inlet for receiving samples to be tested and an outlet communicating with the inlet to the detector, the desorber including a manifold with means substantially adjacent the inlet to the desorber for directing dry air from the manifold and across the inlet to the desorber, a heater for heating the desorber to evaporate materials of interest, and a pump for carrying the materials of interest on the dry air and into the detector.
6. The apparatus of claim 5, wherein the detector is an ion mobility spectrometer.
7. The apparatus of claim 5, wherein the detector is an ion trap mobility spectrometer.
8. The apparatus of claim 5, wherein the means for directing dry air from the manifold and across the inlet to the desorber comprises a plurality of small holes substantially adjacent the inlet to the desorber.
9. The apparatus of claim 5, wherein the means for directing dry air from the manifold and across the inlet to the desorber comprises a narrow slot substantially adjacent the inlet to the desorber.
10. The apparatus of claim 5, wherein the means for directing dry air from the manifold and across the inlet to the desorber comprises a linear curtain substantially adjacent the inlet to the desorber.
11. The apparatus of claim 5, wherein the means for directing dry air from the manifold and across the inlet to the desorber comprises a purging air curtain substantially adjacent the inlet to the desorber.
12. The apparatus of claim 5, wherein material of interest is collected on a sample trap comprising a flat flexible porous material, the inlet to the desorber being a narrow slot dimensioned to receive the sample trap therein, the manifold being substantially adjacent the slot and comprising means for achieving air flow on opposite respective sides of the sample trap.
13. The apparatus of claim 5, wherein dry air directed into the desorber is passed to atmosphere outside the absorber for creating a dry air curtain substantially adjacent the inlet to the desorber.
14. The apparatus of claim 5, further comprising a dryer assembly for drying air directed into the desorber, the dryer assembly comprising at least first and second dryers and valve means for selectively placing the first and second dryers in communication with the desorber, heaters substantially adjacent the respective dryers and being selectively operable for recharging the dryers.
15. The detector apparatus of claim 5, further comprising a trap for carrying materials of interest, said trap being removably engaged in the inlet of the desorber and being formed from a non-woven fabric.
16. The apparatus of claim 15, wherein the trap is a non-woven felt fabric made of a high temperature polyamide fiber having a thickness of less than 3 mm.
17. The detector apparatus of claim 15, wherein the trap is made of stainless steel fibers.
18. The apparatus of claim 5, further comprising a trap removably disposed in said desorber, said trap being formed from an open weave fiberglass fabric coated with a layer of PTFE sufficiently thin to leave open spaces between woven fibers of the fiberglass.
19. The detector apparatus of claim 18, wherein the open weave fiberglass fabric is roughened sufficiently to cut through the PTFE at a plurality of locations and to break a portion of the fibers such that short broken fibers project from the fabric and act as a scrubbing material for picking up small particles of material to be detected by the apparatus.
20. A method for detecting trace amounts of materials of interest, said method comprising the steps of:
providing at least one trap formed from a non-woven fabric selected from the group consisting of high temperature polyamide fibers and stainless steel fibers, said trap having a thickness of less than 3 mm;
providing a detector apparatus which comprises a desorber having an inlet for receiving the traps and having an outlet, the apparatus further having a detector with an inlet communicating with the outlet of the desorber;
placing the trap in proximity to a test subject;
inserting the trap into the desorber; and directing a flow of air from the desorber to the detector for testing for the presence of trace amounts of material of interest on the trap.
21. The method of claim 20, wherein the trap is made from a non-woven felt fabric formed from a high temperature polyamide fiber, and wherein the step of placing the trap in proximity to the test subject comprises wiping the trap across the surface of the test subject.
22. The method of claim 20, wherein the trap is made from stainless steel fibers, and wherein the trap is disposed in a walk-through portal for detecting the presence of the trace materials of interest without directly contacting the subject.
23. The method of claim 22, wherein the step of placing the trap in proximity to the subject comprises placing the trap vertically above the subject.
CA2285153A 1998-10-06 1999-10-06 Materials and apparatus for the detection of contraband Expired - Lifetime CA2285153C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10316898P 1998-10-06 1998-10-06
US60/103,168 1998-10-06

Publications (2)

Publication Number Publication Date
CA2285153A1 true CA2285153A1 (en) 2000-04-06
CA2285153C CA2285153C (en) 2010-05-11

Family

ID=22293742

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2285153A Expired - Lifetime CA2285153C (en) 1998-10-06 1999-10-06 Materials and apparatus for the detection of contraband

Country Status (5)

Country Link
US (2) US6642513B1 (en)
EP (1) EP0992782B1 (en)
AT (1) ATE303589T1 (en)
CA (1) CA2285153C (en)
DE (1) DE69926965T2 (en)

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CN104662404A (en) * 2012-09-21 2015-05-27 史密斯探测-沃特福特有限公司 Sample collection thermal desorber
CN113324784A (en) * 2021-05-31 2021-08-31 邹屹洋 Detection equipment for continuous automatic sampling

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CN104662404A (en) * 2012-09-21 2015-05-27 史密斯探测-沃特福特有限公司 Sample collection thermal desorber
US9953820B2 (en) 2012-09-21 2018-04-24 Smiths Detection-Watford Limited Sample collection thermal desorber
CN113324784A (en) * 2021-05-31 2021-08-31 邹屹洋 Detection equipment for continuous automatic sampling
CN113324784B (en) * 2021-05-31 2023-04-07 邹屹洋 Detection equipment for continuous automatic sampling

Also Published As

Publication number Publication date
EP0992782A1 (en) 2000-04-12
ATE303589T1 (en) 2005-09-15
US6815670B2 (en) 2004-11-09
US6642513B1 (en) 2003-11-04
DE69926965D1 (en) 2005-10-06
CA2285153C (en) 2010-05-11
EP0992782B1 (en) 2005-08-31
US20040094707A1 (en) 2004-05-20
DE69926965T2 (en) 2006-06-08

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