WO2011161668A1 - Method devices and systems for use in ion mobility spectroscopy - Google Patents

Method devices and systems for use in ion mobility spectroscopy Download PDF

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Publication number
WO2011161668A1
WO2011161668A1 PCT/IL2011/000432 IL2011000432W WO2011161668A1 WO 2011161668 A1 WO2011161668 A1 WO 2011161668A1 IL 2011000432 W IL2011000432 W IL 2011000432W WO 2011161668 A1 WO2011161668 A1 WO 2011161668A1
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WO
WIPO (PCT)
Prior art keywords
tubular portion
housing
sample
reagent
interior
Prior art date
Application number
PCT/IL2011/000432
Other languages
French (fr)
Inventor
Avraham Lorber
Zeev Karpas
Moshe Golan
Original Assignee
3 Q B D Ltd.
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
Application filed by 3 Q B D Ltd. filed Critical 3 Q B D Ltd.
Priority to EP11731508.5A priority Critical patent/EP2576064A1/en
Publication of WO2011161668A1 publication Critical patent/WO2011161668A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
    • B01L3/50—Containers for the purpose of retaining a material to be analysed, e.g. test tubes
    • B01L3/508—Containers for the purpose of retaining a material to be analysed, e.g. test tubes rigid containers not provided for above
    • B01L3/5082—Test tubes per se
    • B01L3/50825—Closing or opening means, corks, bungs
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L1/00—Enclosures; Chambers
    • B01L1/52—Transportable laboratories; Field kits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2200/00—Solutions for specific problems relating to chemical or physical laboratory apparatus
    • B01L2200/02—Adapting objects or devices to another
    • B01L2200/026—Fluid interfacing between devices or objects, e.g. connectors, inlet details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2200/00—Solutions for specific problems relating to chemical or physical laboratory apparatus
    • B01L2200/16—Reagents, handling or storing thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2300/00—Additional constructional details
    • B01L2300/04—Closures and closing means
    • B01L2300/041—Connecting closures to device or container
    • B01L2300/042—Caps; Plugs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2300/00—Additional constructional details
    • B01L2300/08—Geometry, shape and general structure
    • B01L2300/0832—Geometry, shape and general structure cylindrical, tube shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2300/00—Additional constructional details
    • B01L2300/08—Geometry, shape and general structure
    • B01L2300/0861—Configuration of multiple channels and/or chambers in a single devices
    • B01L2300/087—Multiple sequential chambers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2400/00—Moving or stopping fluids
    • B01L2400/06—Valves, specific forms thereof
    • B01L2400/0677—Valves, specific forms thereof phase change valves; Meltable, freezing, dissolvable plugs; Destructible barriers
    • B01L2400/0683—Valves, specific forms thereof phase change valves; Meltable, freezing, dissolvable plugs; Destructible barriers mechanically breaking a wall or membrane within a channel or chamber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
    • B01L3/50—Containers for the purpose of retaining a material to be analysed, e.g. test tubes
    • B01L3/502—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures
    • B01L3/5029—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures using swabs

Abstract

Provided is a device (2) for reacting a sample (32) with a reagent (12). The device has an elongated tubular portion (4) being connected to a housing (6). A capsule (10) contains a reagent and a tearable membrane (14) covering the reagent. The capsule is slidable in the housing from a first position in which the tip of the tubular portion does not contact the tearable membrane and a second position in which the tip of the tubular portion pierces or tears the tearable membrane. The device may be used with a swab (32) dimensioned to be inserted into the tubular portion so that the sample on the tip of the swab is located in the reagent when the capsule is in its second position. The invention also provides a sampling block (40) for heating the reagent and sample to form vapors from the sample. A gas is conducted through the vapors to pick up the vapors. The gas containing the sample vapors can then be analyzed, for example, by ion mobility spectroscopy.

Description

METHOD DEVICES AND SYSTEMS FOR USE IN ION MOBILITY
SPECTROSCOPY
FIELD OF THE INVENTION
This invention relates to devices and methods for use in ion mobility spectroscopy.
BACKGROUND OF THE INVENTION
Biogenic amines are produced mainly by the breakdown of amino acids. For example, the decarboxylation of histidine, ornithine, and lysine, produces histamine, putrescine and cadaverine respectively. The presence of biogenic amines in human body fluids has been used as an indication of a pathological condition. For example, elevated levels of certain biogenic amines in urine may indicate the presence of a cancer. Several of the types of vaginal diseases are also known to be revealed by elevated levels of biogenic amines in vaginal discharge and fluids.
Biogenic amines may be detected by various methods including ion mobility spectroscopy (IMS). In IMS, a vaporous mixture of one or more ion species is made to travel through a drift tube which has an applied electric field. A buffer gas moves in the drift tube in a direction opposite to that of the ions to be detected. Larger ions, that have larger collision cross sections, tend to collide more often with the buffer gas molecules, and are thus impeded in the drift tube more than smaller ions. An ion's migration velocity through the tube (the ion mobility) depends on the ion's mass, charge, size and shape. At the end of the tube is an ion detector. The time at which an ion arrives at the detector is thus a characteristic of the ion and can be used to identify the ion.
US Patent 7,933,719 to Lorber et al. discloses a method for determining the amounts of biogenic amines present in a vaginal discharge or fluid.
In order to use IMS to identify biological amines present in a sample, it is necessary to first vaporize the amines present in the sample. SUMMARY OF THE INVENTION
In its first aspect, the present invention provides a device for vaporizing a sample obtained on a swab. The device of the invention comprises an elongated tubular portion attached to a housing into which a swab may be inserted. A bottom end of the tubular portion is located inside the interior of the housing so that the interior of the tubular portion is confluent with the interior of the housing. The device further comprises a capsule containing a reagent solution that is sealed with a thin sheet of a tearable material, such as a thin aluminum foil. The capsule is slidable in the housing from a first position in which the bottom end of the tubular portion does not contact the thin sheet and a second position in which the second end of the tubular portion pierces or tars the thin sheet to open the capsule.
The invention also provides a system comprising the device for vaporizing a sample obtained on a swab and a swab for obtaining a sample. At one end of the shaft of the swab an absorbent material is attached. At the other end of the shaft is a stopper dimensioned to partially fit into the opening of the tubular portion of the device and to seal the opening. The length of the shaft of the swab is selected so that the absorbent material at the tip of the swab is located in the capsule when the opening is sealed by the stopper, and the capsule is its second position.
The swab is used to obtain a sample that may be, for example, a sample of a body fluid such as, saliva, sweat, urine, feces, vaginal fluids, or a throat swipe, or of body tissues. The swab is inserted into the tubular portion of the device and the capsule is slid from its first position to its second position causing the tip of the tubular portion to pierce or tear the thin sheet. As this occurs, the absorbent material and the sample become submerged in the reagent.
The system of the invention may also include a sampling block for vaporizing the sample. The sampling bloc is provided with a well configured to receive the housing and the capsule of the device. A first heating element heats the reagent and sample to produce vapors formed from the sample. A gas conduction system conducts gas through the vapors to pick up the vapors as the gas passes through the capsule. The gas containing the vapors formed from the sample can then be analyzed, for example by ion mobility spectroscopy.
Thus, in its first aspect, the present invention provides adevice for reacting a sample with a reagent comprising: (a) an elongated tubular portion having an interior, a first end and a second end, the tubular portion being provided with one or more apertures in a wall of the tubular portion;
(b) a housing attached to the second end of the tubular portion, the second end of the tubular portion being located in an interior of the housing, and the housing being provided with one or more apertures in a wall of the housing, the interior of the housing being confluent with the interior of the tubular portion; and
(c) a capsule containing a reagent and a tearable membrane covering the reagent, the capsule being slidable in the housing from a first position in which the second end of the tubular portion does not contact the tearable membrane and a second position in which the second end of the tubular portion pierces the tearable membrane.
The device of the invention may further comprise a cylindrical guard surrounding the second end of the tubular portion in the interior of the housing. The device may further comprise a rim surrounding a bottom edge of the housing, the rim being configured to prevent the capsule from disengaging from the housing.
In its second aspect, the invention provides a system for collecting a sample and reacting the sample with a reagent, comprising:
(a) A device for reacting a sample with a reagent, the device comprising:
(i) an elongated tubular portion having an interior, a first end and a second end, the tubular portion being provided with one or more apertures in a wall of the tubular portion;
(ii) a housing attached to the second end of the tubular portion, the second end of the tubular portion being located in an interior of the housing, and the housing being provided with one or more apertures in a wall of the housing, the interior of the housing being confluent with the interior of the tubular tubuar portion; and
(iii) a capsule containing a reagent and a tearable membrane covering the reagent, the capsule being slidable in the housing from a first position in which the second end of the tubular portion does not contact the tearable membrane and a second position in which the second end of the tubular portion pierces the tearable membrane; and
(b) a swab comprising an elongated shaft having a first end and a second end and further having at the first end a stopper dimensioned to partially fit into the first end of the tubular portion and to seal the first end of the tubular portion and an absorbent material attached to the second end of the shaft, wherein the length of the shaft is selected so that the absorbent material is located in the capsule when the first end of the tubular portion is sealed by the stopper and the capsule is in the second position of the capsule.
The system may be sterilized and enclosed in a sealed packaging. The system may be used, for example, to obtain a sample of body fluid or tissue and for reacting the sample with a reagent. The sample may be a vaginal sample.
The system may further comprise a sampling block comprising:
(a) a well configured to receive the housing of the device for reacting a sample with a reagent;
(b) a first heating element configured to heat substances in the housing; and
(c) a gas conduction system configured to conduct a gas from a gas inlet in the sampling block through the one or more apertures in the wall of the tubular portion into the housing, from the interior of the housing through the one or more apertures in the wall of the housing to a vapor pass, and from the vapor pass to a gas outlet.
The sampling block may further comprise a cartridge chamber configured to hold a cartridge of a permeation filter as well as one or more cartridges of a permeation filter. The permeation filter may be, for example, triethyl phosphonate. The cartridge may be made from a material that is permeable to the permeation filter such as polypropylene. The sampling block may be configured to mix the permeation filter with gas in the gas conduction system before the gas exits the sampling block via the gas outlet.
The first heating element may be a halogen lamp. In this case, the reagent may contain a pigment absorbing energy at a wavelength emitted by the halogen lamp. The sampling block may contain a pipe conducting the gas out of the well that is inclined. In this case, the sampling block may further comprise a second heating element for heating gas in the inclined pipe.
The invention also provides a sampling block for use in the system of the invention.
The invention further provides a method for analyzing a sample on swab, the swab having an elongated shaft having a first end and a second end and further having at the first end of the shaft a stopper and an absorbent material attached to the second end of the shaft, the sample being associates with the absorbent material; the method comprising:
(a) inserting the swab into a device for reacting a sample with a reagent, the device comprising:
(i) an elongated tubular portion having an interior, a first end and a second end, the tubular portion being provided with one or more apertures in a wall of the tubular portion;
(ii) a housing attached to the second end of the tubular portion, the second end of the tubular portion being located in an interior of the housing, and the housing being provided with one or more apertures in a wall of the housing, the interior of the housing being confluent with the interior of the tubular portion; and
(iii) a capsule containing a reagent and a tearable membrane covering the reagent, the capsule being slidable in the housing from a first position in which the second end of the tubular portion does not contact the tearable membrane and a second position in which the second end of the tubular portion pierces the tearable membrane;
the cartridge being in the first position of the cartridege when the swab is inserted into the device.
(b) sealing the first end of the tubular portion of the device with the stopper;
(c) sliding the cartridge from the first position of the cartridge into the second position of the of cartridge so as to submerge the sample in the reagent; (d) introducing the device and the swab into a well of a sampling block, the sampling block comprising:
(i) a well configured to receive the housing of the device for reacting a sample with a reagent;
(ii) a first heating element configured to heat substances in the housing; and
(iii) a gas conduction system configured to conduct a gas from a gas inlet in the sampling block through the one or more apertures in the wall of the tubular portion into the housing, from the interior of the housing through the one or more apertures in the wall of the housing to a vapor pass, and from the vapor pass to a gas outlet;
(e) activating the first heating element to heat the reagent and sample;
(f) conducting a gas through the gas conducting system to obtain vapors formed from the sample; and
(g) subjecting the vapors formed from the sample to ion mobility spectroscopy.
The method of the invention may further comprise a step of mixing the vapors formed from the sample with a permeation filter prior to subjecting the vapors to ion mobility spectroscopy. The permeation filter may be, for example, is triethyl phosphonate.
BRIEF DESCRIPTION OF THE DRAWINGS
In order to understand the invention and to see how it may be carried out in practice, embodiments will now be described, by way of non-limiting example only, with reference to the accompanying drawings, in which:
Fig. 1 shows a device for reacting a sample with a reagent in accordance with one embodiment of the invention;
Fig. 2 shows a swab for use with the device of Fig. 1 ;
Fig. 3 shows a sampling block for vaporizing a sample after reacting with a reagent; Fig. 4 shows the device of Fig. 1 after reacting the sample with the the reagent; and
Fig. 5 shows the device of Fig. 1 inserted into the sampling block of Fig. 3.
DETAILED DESCRIPTION OF EMBODIMENTS
Fig. 1 shows a device 2 for vaporizing a sample obtained on a swab in accordance with one embodiment of this aspect of the invention. The device 2 comprises an elongated tubular portion 4 attached to a housing 6. The tubular portion 4 has an opening 8 at a first end into which a swab may be inserted, as explained below. A second end of the tubular portion is located inside the interior of the housing 6 so that the interior of the tubular portion 4 is confluent with the interior of the housing 6. The device 2 further comprises a capsule 10 that can contain a reagent solution 12. When a reagent solution is present in the capsule 10, the capsule is sealed with a thin sheet 14 of a tearable material, such as a thin aluminum foil. The thin sheet is adhered to a rim 16 of the capsule 10. The housing 6 is open at the bottom and the capsule 10 is slidable in the housing 6 from a first position shown in Fig. 1 in which the second end of the tubular portion does not contact the thin sheet 14 and a second position shown in Fig. 4 in which the second end of the tubular portion is located in the interior of the capsule 10. Movement of the capsule towards the second end of the tubular portion is limited by means of a cylindrical guard 15 surrounding the tubular portion 4 inside the interior of the housing 6. The capsule 10 is prevented from disengaging from the housing 6 by a rim 18 which is dimensioned to prevent the rim 16 from passing through the rim 18.
Fig. 2 shows a swab 22 that may be used to collect a sample to be vaporized using the device 2. The swab 22 comprises an elongated shaft 24. At one end of the shaft 24 an absorbent material 28 is attached. The absorbent material may be, for example, a wad of cotton or a small piece of cloth or felt. At the other end of the shaft 24 is a stopper 30 having the shape of an inverted truncated cone. The stopper 30 is dimensioned to partially fit into the opening 8 and to seal the opening 8 closed. The length of the shaft 24 is selected so that the absorbent material 28 is located in the capsule when the opening 8 is sealed by the stopper 30, as shown in Fig. 4. .
Fig. 4 shows the swab 22 after having collected a sample 32 on the absorbent material 28. The sample 32 may be, for example, a sample of a body fluid such as, saliva, sweat, urine, feces, vaginal fluids, or a throat swipe, or of body tissues. The swab 22 has been inserted into the tubular portion 4 of the device 2, with the stopper 30 sealing the first end of the tubular portion 4. After insertion of the swab into the tubular portion 4, the capsule 10 is slid from its first position shown in Fig. 1 to its second position shown in Fig. 4. The second end of the tubular portion 4 has a tip that is beveled and serrated that extends beyond the bottom edge of the cylindrical guard 15. Thus, as the capsule 6 is moved towards its second position, the tip of the tubular portion 4 pierces and tears the thin sheet 14. As this occurs, the absorbent material 28 and the sample 32 become submerged in the reagent 12. In the second portion of the capsule 10, the untorn portion of the thin sheet 14 is abutted against the bottom edge of the cylindrical guard 15.
Fig. 3 shows a sampling block 40 for vaporizing the sample 32, in accordance with one embodiment of the invention. The sampling bloc 40 is provided with a well 42 having an opening 43 that opens to an upper surface 44 of the sampling block 40. The well 42 and other components of the sampling block 40 mentioned below that are located inside the sampling block are indicated by broken lines. The sampling block is also provided with a gas conduction system. The gas conduction system comprises a gas inlet 46 configured to be connected to a source of a pressurized gas. Gas entering the gas inlet 46 is conducted to the interior of the well 42 by means of a pipe 48. Gas is conducted out of the well by a pipe 50. A cartridge chamber 52 is configured to hold a cartridge 54 of a permeation filter, such as triethyl phosphonate. After insertion of a cartridge 54 in the cartridge chamber 52, the cartridge chamber 52 is closed by a screw on cap 56. The cartridge 54 may be made from a material that is permeable to the permeation filter, such as polypropylene. Gas vapors released inside the cartridge chamber diffuse out of the cartridge chamber 52 in a pipe that joins the pipe 50 in a common outlet 60. The outlet 60 is configured to be attached to an ion mobility spectrometer. The pipe 50 is inclined so that its opening in the well 42 is lower than its opening into the pipe 58.
The sampling block 40 is also provided with a first heating element 62 for heating the contents of the well, and a second heating element 64 for heating gas in the pipe 50.
Fig. 5 shows the device 2 with the capsule in its second position and with the absorbent material 28 and the sample 32 submerged in the reagent 12 after insertion in the well 42. The device 2 is provided with an annular stopper 20 that surrounds the tubular portion 4. When the device 2 is inserted in the well 42, the stopper 20 seals the opening 43 to prevent gasses and vapors in the well 42 from escaping through the opening 43.
After submersion of the sample 32 in the reagent 12 and release of the sample into the reagent 12, , the reagent is heated by means of a first heating element 62 in order to vaporize the reagent. The first heating element 62 may be for example, a halogen lamp. In this case, heating of the reagent 12 is enhanced by including in the reagent a pigment that is heated by the lamp.
A source of a pressurized gas is connected to the inlet 46. The gas may be, for example, filtered air. A gas entering the well 42 from the pipe 46 enters the tubular portion 4 via one or more apertures 66 located in the wall of the tubular portion 4 between the housing 6 and the stopper 20. From the interior of the tubular portion 4, the gas flows through the tubular portion, and then through the capsule 10 where the gas picks up any vapors in the capsule 10. The gas then leaves the capsule 10 through one or more apertures 68 in the wall of the capsule 6 before entering the pipe 50. While flowing through the pipe 50, the gas is reheated by a second heating element 64, that may be, for example, an electrical heating coil. As the gas leaves the pipe 64 it mixes with the permeation filter diffusing in the pipe 58 before leaving the sampling block 40 via the outlet 60. The gas can then be conducted to an ion mobility spectrometer, as is known in the art.

Claims

A device for reacting a sample with a reagent comprising:
(a) an elongated tubular portion having an interior, a first end and a second end, the tubular portion being provided with one or more apertures in a wall of the tubular portion;
(b) a housing attached to the second end of the tubular portion, the second end of the tubular portion being located in an interior of the housing, and the housing being provided with one or more apertures in a wall of the housing, the interior of the housing being confluent with the interior of the tubular portion; and
(c) a capsule containing a reagent and a tearable membrane covering the reagent, the capsule being slidable in the housing from a first position in which the second end of the tubular portion does not contact the tearable membrane and a second position in which the second end of the tubular portion pierces the tearable membrane.
The device according to Claim 1 further comprising a cylindrical guard surrounding the second end of the tubular portion in the interior of the housing.
The device according to Claim 2 further comprising a rim surrounding a bottom edge of the housing, the rim being configured to prevent the capsule from disengaging from the housing.
A system for collecting a sample and reacting the sample with a reagent, comprising:
(a) A device for reacting a sample with a reagent, the device comprising:
(i) an elongated tubular portion having an interior, a first end and a second end, the tubular portion being provided with one or more apertures in a wall of the tubular portion;
(ii) a housing attached to the second end of the tubular portion, the second end of the tubular portion being located in an interior of the housing, and the housing being provided with one or more apertures in a wall of the housing, the interior of the housing being confluent with the interior of the tubular portion; and
(iii) a capsule containing a reagent and a tearable membrane covering the reagent, the capsule being slidable in the housing from a first position in which the second end of the tubular portion does not contact the tearable membrane and a second position in which the second end of the tubular portion pierces the tearable membrane; and
(b) a swab comprising an elongated shaft having a first end and a second end and further having at the first end a stopper dimensioned to partially fit into the first end of the tubular portion and to seal the first end of the tubular portion and an absorbent material attached to the second end of the shaft, wherein the length of the shaft is selected so that the absorbent material is located in the capsule when the first end of the tubular portion is sealed by the stopper and the capsule is in the second position of the capsule.
5. The system according to Claim 4 wherein the system is sterilized and enclosed in a sealed packaging.
6. The system according to Claim 4 or 5 for use in obtaining a sample of body fluid or tissue and for reacting the sample with a reagent.
7. The system according to Claim 6 wherein the sample is a vaginal sample.
8. The system according to any one of Claims 4 to 6 further comprising a sampling block comprising:
(a) a well configured to receive the housing of the device for reacting a sample with a reagent;
(b) a first heating element configured to heat substances in the housing; and
(c) a gas conduction system configured to conduct a gas from a gas inlet in the sampling block through the one or more apertures in the wall of the tubular portion into the housing, from the interior of the housing through the one or more apertures in the wall of the housing to a vapor pass, and from the vapor pass to a gas outlet.
9. The system according to Claim 8 wherein the sampling block further comprises a cartridge chamber configured to hold a cartridge of a permeation filter.
10. The system according to Claim 9 further comprising one or more cartridges of a permeation filter.
11. The system according to Claim 10 wherein the permeation filter is triethyl phosphonate.
12. The system according to Claim 10 or 11 wherein the cartridge is made from a material that is permeable to the permeation filter.
13. The system according to Claim 12 wherein the cartridge is made from polypropylene.
14. The system according to any one of Claims 9 to 13 wherein the sampling block is configured to mix the permeation filter with gas in the gas conduction system before the gas exits the sampling block via the gas outlet.
15. The system according to any one of Claims 8 to 14 wherein the first heating element is a halogen lamp.
16. The system according to Claim 15 wherein the reagent contains a pigment absorbing energy at a wavelength emitted by the halogen lamp.
17. The system according to any one of Claims 8 to 16 wherein a pipe conducting gas out of the well is inclined.
18. The system according to Claim 17 wherein the sampling block further comprises a second heating element for heating gas in the inclined pipe.
19. A sampling block for use in the system of Claims 8 to 18.
20. A method for analyzing a sample on swab, the swab having an elongated shaft having a first end and a second end and further having at the first end of the shaft a stopper and an absorbent material attached to the second end of the shaft, the sample being associates with the absorbent material; the method comprising:
(a) inserting the swab into a device for reacting a sample with a reagent, the device comprising:
(i) an elongated tubular portion having an interior, a first end and a second end, the tubular portion being provided with one or more apertures in a wall of the tubular portion;
(ii) a housing attached to the second end of the tubular portion, the second end of the tubular portion being located in an interior of the housing, and the housing being provided with one or more apertures in a wall of the housing, the interior of the housing being confluent with the interior of the tubular portion; and (iii) a capsule containing a reagent and a tearable membrane covering the reagent, the capsule being slidable in the housing from a first position in which the second end of the tubular portion does not contact the tearable membrane and a second position in which the second end of the tubular portion pierces the tearable membrane;
the cartridge being in the first position of the cartridege when the swab is inserted into the device.
(b) sealing the first end of the tubular portion of the device with the stopper;
(c) sliding the cartridge from the first position of the cartridge into the second position of the of cartridge so as to submerge the sample in the reagent;
(d) introducing the device and the swab into a well of a sampling block, the sampling block comprising:
(iv) a well configured to receive the housing of the device for reacting a sample with a reagent;
(v) a first heating element configured to heat substances in the housing; and
(vi) a gas conduction system configured to conduct a gas from a gas inlet in the sampling block through the one or more apertures in the wall of the tubular portion into the housing, from the interior of the housing through the one or more apertures in the wall of the housing to a vapor pass, and from the vapor pass to a gas outlet;
(e) activating the first heating element to heat the reagent and sample; and
(f) conducting a gas through the gas conducting system to obtain vapors formed from the sample; and (g) subjecting the vapors formed from the sample to ion mobility spectroscopy.
21. The method according to Claim 20 further comprising mixing the vapors formed from the sample with a permeation filter prior to subjecting the vapors to ion mobility spectroscopy.
22. The method according to Claim 21 wherein the permeation filter is triethyl phosphonate.
PCT/IL2011/000432 2010-06-03 2011-06-02 Method devices and systems for use in ion mobility spectroscopy WO2011161668A1 (en)

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EP11731508.5A EP2576064A1 (en) 2010-06-03 2011-06-02 Method devices and systems for use in ion mobility spectroscopy

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US35104410P 2010-06-03 2010-06-03
US61/351,044 2010-06-03

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