Sampling container, sampling device, sampling kit, collection method, and analysis method
The sampling container and device system addresses gas composition fluctuations during collection by using a flexible housing and pressure reduction, allowing for accurate analysis.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- PANASONIC HOUSING SOLUTIONS CO LTD
- Filing Date
- 2025-11-25
- Publication Date
- 2026-06-25
Smart Images
Figure JP2025040988_25062026_PF_FP_ABST
Abstract
Description
Sampling container, sampling device, sampling kit, sampling method and analysis method
[0001] The present disclosure relates to a sampling container, a sampling device, a sampling kit, a sampling method and an analysis method. More specifically, it relates to a sampling container and a sampling device, a sampling kit including the sampling container and the sampling device, and a sampling method and an analysis method including using the sampling container.
[0002] Patent Document 1 discloses an autosampler including a sampling needle inserted into a sample container through a septum of the sample container to suck a sample in the sample container from a tip portion, a drive mechanism for driving the sampling needle, and a control unit for controlling the operation of the drive mechanism.
[0003] Japanese Patent Application Laid-Open No. 2009-122091
[0004] An object of the present disclosure is to provide a sampling container capable of collecting and storing external gas while suppressing fluctuations in the component composition, a sampling device used to store gas in this sampling container, a sampling kit including the sampling container and the sampling device, and a sampling method and an analysis method including using the sampling container.
[0005] A sampling container according to one aspect of the present disclosure includes an outer shell portion and a storage portion. The outer shell portion has an internal space, an exhaust port, and an inlet. The storage portion is in a bag shape made of a flexible sheet material, is disposed in the internal space, and the inside and outside of the storage portion in the internal space are airtight with the sheet material. The exhaust port allows the outside of the storage portion in the internal space and the outside of the outer shell portion to communicate. The inlet allows the inside of the storage portion in the internal space and the outside of the outer shell portion to communicate.
[0006] A sampling device according to one aspect of the present disclosure includes an arrangement portion where the sampling container is detachably arranged, and an intake mechanism that sucks gas in the internal space of the sampling container through the exhaust port in a state where the sampling container is arranged in the arrangement portion.
[0007] A sampling kit according to one aspect of the present disclosure comprises the sampling container and the sampling device.
[0008] A sampling method according to an aspect of the present disclosure includes exposing the inlet of the sampling container to the gas to be sampled located outside the sampling container, and reducing the pressure outside the containment in the internal space, thereby causing the gas to flow into the containment from the inlet.
[0009] An analytical method according to one aspect of the present disclosure includes extracting the gas in the containment section of the sampling container using an autosampler and supplying it to an analytical instrument.
[0010] Figure 1 is a cross-sectional view of a sampling container in an embodiment of the present disclosure, without gas contained within it. Figure 2 is a cross-sectional view of a sampling container in an embodiment of the same disclosure, with gas contained within it. Figure 3 is a cross-sectional view of a sampling kit in an embodiment of the same disclosure, with gas not contained within the sampling container. Figure 4 is a cross-sectional view of a sampling kit in an embodiment of the same disclosure, with gas contained within the sampling container. Figure 5 is a schematic diagram showing the intake path in a sampling device of the same embodiment. Figure 6 is a schematic diagram showing the intake path in a sampling device of a modified example of the present disclosure. Figure 7 is a schematic diagram showing the intake path in a sampling device of a modified example of the present disclosure.
[0011] Embodiments and modifications will be described with reference to the drawings. Note that the embodiments and modifications described below are only a part of the various embodiments of this disclosure. Furthermore, the embodiments and modifications described below can be modified in various ways depending on the design, etc., as long as the objectives of this disclosure are achieved. It is also possible to combine the configurations of the modifications as appropriate. The figures referenced below are all schematic diagrams, and the dimensional ratios of the components in the figures do not necessarily reflect the actual dimensional ratios.
[0012] 1. Overview When analyzing a gas, for example, the gas is placed in a container called a vial, and this gas is supplied from the container to an analytical instrument using an autosampler or the like, and the gas is then analyzed by the analytical instrument. When placing the gas in a vial, for example, the gas is first collected from the environment using a flexible sample bag or a vacuum-capable glass gas collection container. This allows the gas to be collected while suppressing fluctuations in the gas's component composition. Subsequently, this gas is transferred from the sample bag or the like into the vial.
[0013] However, using the sample bags or gas sampling containers mentioned above requires the extra step of collecting the gas and then transferring it to a vial or similar container. Furthermore, the composition of the gas may change during the transfer process, potentially making accurate analysis difficult.
[0014] Therefore, in this embodiment, a sampling container is provided that can collect and contain gas from outside a sampling container such as a vial while suppressing fluctuations in its component composition.
[0015] As shown in Figures 1 and 2, the sampling container 1 of the embodiment comprises an outer shell 20 and a housing 4. The outer shell 20 has an internal space 24, an exhaust port 23, and an inlet 6. The housing 4 is a bag-shaped structure made from a flexible sheet material 41 and is placed within the internal space 24, with the inside 242 and outside 241 of the housing 4 airtightly sealed by the sheet material 41. The exhaust port 23 allows the outside 241 of the housing 4 in the internal space 24 to pass through to the outside of the outer shell 20. The inlet 6 allows the inside 242 of the housing 4 in the internal space 24 to pass through to the outside of the outer shell 20.
[0016] The sampling device 7 of this embodiment includes a placement section 9 on which the sampling container 1 is detachably arranged, and an intake mechanism that sucks the gas in the internal space 24 of the sampling container 1 through an exhaust port 23 when the sampling container 1 is placed in the placement section 9.
[0017] The sampling kit 70 of this embodiment comprises a sampling container 1 and a sampling device 7.
[0018] The sampling method of the embodiment includes exposing the inlet 6 of the sampling container 1 to the gas to be sampled located outside the sampling container 1, and then reducing the pressure outside 241 of the containment section 4 in the internal space 24, thereby causing the gas to flow into the containment section 4 from the inlet 6.
[0019] The analysis method of this embodiment includes extracting the gas in the containment section 4 of the sampling container 1 using an autosampler and supplying it to an analytical instrument.
[0020] In this embodiment, by reducing the pressure outside the containment section 4 in the internal space 24 of the sampling container 1 through the exhaust port 23, the containment section 4 is deformed by the pressure difference so that the volume of its interior 242 increases, allowing gas from outside the sampling container 1 to flow into the containment section 4 through the inlet 6. This allows the gas to be collected while suppressing fluctuations in its component composition and stored in the containment section 4 of the sampling container 1. The gas stored in the containment section 4 can then be supplied to an analytical instrument, for example, as described above, for analysis such as component analysis.
[0021] 2. Details of the sampling container 1 of the sampling container embodiment will be described with reference to Figures 1 and 2.
[0022] The sampling container 1 in this embodiment is also called a vial, vial bottle, or vial container. The sampling container 1 contains a gas sample. The gas contained in the sampling container 1 is extracted from the sampling container 1, for example, using a syringe, and analyzed using an analytical instrument. However, the use of the sampling container 1 is not limited to this.
[0023] The sampling container 1 is cylindrical. A cylindrical shape means a shape that can be generally recognized as a cylinder, and to that extent, it may have some constrictions, indentations, protrusions, and distortions.
[0024] The diameter of the sampling container 1 is, for example, 11 mm to 22 mm. In this case, the sampling container 1 can be handled by an autosampler.
[0025] The sampling container 1 comprises an outer shell 20, a housing 4, and a septum 5.
[0026] The outer shell portion 20 comprises a main body portion 2 and a lid portion 3.
[0027] The main body 2 is composed of a cylindrical peripheral wall 21. The peripheral wall 21 is made of a hard resin or glass, etc. Preferably, the peripheral wall 21 is transparent. In that case, the contents of the housing 4 can be seen from outside the sampling container 1.
[0028] The main body 2 has an internal space 24 surrounded by a peripheral wall 21. The main body 2 has an exhaust port 23 and an opening 22 on the opposite side of the exhaust port 23. Both ends of the peripheral wall 21 have openings, with the opening at one end of the peripheral wall 21 being the exhaust port 23 and the opening at the other end being the opening 22. The exhaust port 23 and the opening 22 each allow the outside of the main body 2 to pass through to the internal space 24.
[0029] The lid 3 is attached to the main body 2 so as to close the opening 22 of the main body 2. The lid 3 does not have to be fixed to the main body 2 so as to be unable to be removed from the main body 2, or it may be detachable from the main body 2. If the lid 3 is detachable from the main body 2, it is attached to the main body 2 by, for example, snapping or screwing it in.
[0030] The lid portion 3 has an exposed opening 31 and an inlet 6. The exposed opening 31 penetrates the lid portion 3 and connects the internal space 24 to the outside of the outer shell portion 20. The inlet 6 also penetrates the lid portion 3 and connects the internal space 24 to the outside of the outer shell portion 20.
[0031] When the housing 4 is positioned in the internal space 24, the exhaust port 23 allows the outside 241 of the housing 4 in the internal space 24 to pass through to the outside of the outer shell 20, and the inlet 6 allows the inside 242 of the housing 4 in the internal space 24 to pass through to the outside of the outer shell 20.
[0032] The inlet 6 has a check valve 61. The check valve 61 is configured to allow the flow of gas from outside the outer shell 20 to inside the housing 4 242 at the inlet 6, and to prevent the flow of gas from inside the housing 4 242 to outside the outer shell 20. The check valve 61 in this embodiment is a duckbill type check valve 61. However, the check valve 61 is not limited to a duckbill type check valve 61, and may be a diaphragm type check valve 61, a ball type check valve 61, or a disc type check valve 61, for example.
[0033] The containment section 4 is a bag-shaped structure made from a flexible sheet material 41. The sheet material 41 is, for example, a soft resin sheet that does not have gas permeability, and specifically, it is a polyester sheet such as polyethylene terephthalate sheet, a polyethylene sheet, a fluororesin sheet, or a polypropylene sheet.
[0034] The housing section 4 is positioned within the internal space 24, and the sheet material 41 airtightly seals the space between the inside 242 (the part on the side of the opening 22 relative to the sheet material 41) and the outside 241 (the part on the side of the exhaust port 23 relative to the sheet material 41) of the housing section 4 within the internal space 24. In other words, the sheet material 41 constituting the housing section 4 separates the internal space 24 into the inside 242 and the outside 241 of the housing section 4. As a result, the sheet material 41 can prevent the movement of gas between the inside 242 and the outside 241 of the housing section 4 within the internal space 24.
[0035] The housing section 4 has a single opening 43 that leads to the interior 242 of the housing section 4. The edge 42 surrounding the opening 43 in the housing section 4 overlaps with the edge 25 surrounding the opening 22 in the main body section 2, and is sandwiched between the edge 25 of the main body section 2 and the lid section 3 which is attached to the main body section 2. In this way, the housing section 4 is positioned in the internal space 24 while preventing any gap from forming between the interior 242 and exterior 241 of the housing section 4 in the internal space 24 through which gas can pass.
[0036] The septum 5 is positioned within the exposure opening 31 of the lid portion 3 of the outer shell portion 20. This allows the septum 5 to close the exposure opening 31 and separate the outside of the outer shell portion 20 from the inside 242 of the housing portion 4. The exposure opening 31 exposes the septum 5 to the outside of the outer shell portion 20.
[0037] The septum 5 separates the interior 242 of the housing 4, which is located within the outer shell 20, from the outside of the outer shell 20, thereby ensuring airtightness of the interior 242 of the housing 4. The septum 5 is made of a rubber material that has shape recovery properties. Even after a needle such as a syringe is inserted into the septum 5 and then withdrawn, the hole made by the needle closes quickly, ensuring airtightness of the housing 4. The septum 5 is made of at least one rubber material selected from the group consisting of, for example, butyl rubber, polytetrafluoroethylene, silicone rubber, and fluoroelastomer.
[0038] 3. Sampling device As shown in Figures 3 and 4, the sampling device 7 of the embodiment comprises a placement section 9 and an intake mechanism. The intake mechanism comprises a pressure reducing passage 83, an intake port 92, and a pressure reducing device 10. A sampling container 1 can be detachably placed in the placement section 9.
[0039] The sampling device 7 of this embodiment comprises a device body 8 and a pressure reducing device 10, the device body 8 comprising a placement section 9, a pressure reducing passage 83, and an air intake port 92.
[0040] The main body of the device 8 comprises a hollow housing 81, the interior of which constitutes a pressure reducing passage 83. The housing 81 has a plurality of arrangement sections 9. Each arrangement section 9 is a recess 91 formed in the housing 81. The inner surface of the recess 91 has a bottom surface 911 and a side circumferential surface 912. The bottom surface 911 is circular, and the side circumferential surface 912 is cylindrical. Each arrangement section 9 has an air intake port 92 that opens at the bottom surface 911 of the recess 91. The air intake port 92 connects the outside of the housing 81 to the pressure reducing passage 83. Each arrangement section 9 has a sealing section 93 that is positioned away from the bottom surface 911 on the side circumferential surface 912 and extends around the entire circumference of the side circumferential surface 912. The sealing section 93 is, for example, an O-ring.
[0041] The decompression device 10 is a device that decompresses the decompression path 83, for example, an intake pump. The decompression device 10 and the device main body 8 are connected by an intake pipe 11. The housing 81 of the device main body 8 has a connection port 82 that allows communication between the outside of the housing 81 and the decompression path 83, and the intake pipe 11 is connected to this connection port 82. As a result, in the device main body 8, the intake pipe 11 communicates with the decompression path 83. The decompression device 10 decompresses the inside of the decompression path 83 by sucking the gas in the decompression path 83 through the intake pipe 11.
[0042] 4. The sampling kit 70 of the sampling kit embodiment includes the sampling container 1 and the sampling device 7 of the embodiment, as shown in FIGS. 3 and 4. The sampling kit 70 can be used to collect a gas sample and store it in the sampling container 1.
[0043] A method for collecting gas using the sampling kit 70 will be described.
[0044] First, prepare the sampling container 1 and the sampling device 7 of the embodiment. In the sampling container 1, the inside 242 of the storage part 4 is made to be in a state where no gas is stored (FIG. 1). As a result, fluctuations in the gas component composition when a gas sample is stored in the storage part 4 can be suppressed. When gas is stored in the inside 242 of the storage part 4, for example, a needle such as a syringe is pierced into the septum 5 of the sampling container 1 to reach the tip of the needle to the inside 242 of the storage part 4, and the gas inside 242 of the storage part 4 is sucked by this syringe or the like.
[0045] Next, place the sampling container 1 in the placement part 9 of the sampling device 7 (see FIG. 3). Specifically, the part of the outer shell part 20 of the sampling container 1 on the side of the exhaust port 23 is fitted into the recess 91 of the placement part 9. In the state where the sampling container 1 is placed in the placement part 9, the exhaust port 23 of the sampling container 1 and the intake port 92 of the bottom surface 911 of the recess 91 face each other. Also, the exhaust port 23 and the intake port 92 are blocked from the outside air by the seal part 93.
[0046] In this state, the sampling kit 70 is placed in the gas to be sampled, etc., and the inlet 6 of the sampling container 1 is exposed to the gas to be sampled.
[0047] Next, the decompression device 10 decompresses the inside of the decompression path 83. Then, through the exhaust port 23 and the intake port 92, the gas in the external part 241 of the accommodation part 4 in the internal space 24 of the sampling container 1 is sucked into the decompression path 83. Then, due to the pressure difference, the accommodation part 4 is deformed so that the volume of its inside 242 becomes larger, and accordingly, the gas to be sampled flows into the accommodation part 4 through the inlet 6 (see FIGS. 2 and 4). Thereby, the gas to be sampled is sampled and accommodated in the accommodation part 4. Since the inlet 6 has a check valve 61, it is possible to suppress the gas accommodated in the accommodation part 4 from flowing backward through the inlet 6 and flowing out to the outside.
[0048] When the sampling container 1 is filled with the gas as the sample, the sampling container 1 is removed from the placement part 9 of the sampling device 7.
[0049] In the embodiment, since the sampling device 7 has a plurality of placement parts 9, by placing the sampling containers 1 in the plurality of placement parts 9 respectively, it is possible to sample and accommodate the gas by each of the plurality of sampling containers 1. Note that it is not necessary to place the sampling containers 1 in all of the plurality of placement parts 9, that is, the sampling containers 1 may be placed in a part of the plurality of placement parts 9. In that case, in the placement part 9 where the sampling container 1 is not placed, the intake port 92 can be plugged with a stopper to maintain the decompressed state in the decompression path 83.
[0050] 5. Analysis method The gas accommodated in the accommodation part 4 of the sampling container 1 can be extracted from the sampling container 1 and analyzed by an analytical instrument. The extraction of the gas from the sampling container 1 is performed, for example, by piercing a needle such as a syringe into the septum 5 of the sampling container 1 and sucking the gas in the accommodation part 4 with this syringe or the like.
[0051] The gas in the containment section 4 of the sampling container 1 may be extracted by an autosampler and supplied to the analytical instrument. In this case, the sampling container 1 is set in the autosampler, the autosampler is operated to puncture the septum 5 of the sampling container 1 with the needle of the autosampler's syringe, and the gas in the containment section 4 is aspirated with this syringe. Subsequently, the autosampler sends the gas to the analytical instrument, where the gas is analyzed.
[0052] The analytical instrument is, for example, a gas chromatograph or a gas chromatograph-mass spectrometer. The analytical instrument may also include a gas sensor. In that case, the analytical instrument includes at least one selected from the group consisting of, for example, semiconductor gas sensors, catalytic combustion gas sensors, gas thermal conduction gas sensors, galvanic cell gas sensors, constant potential electrolytic gas sensors, solid electrolyte gas sensors, and various odor sensors.
[0053] 6. In the modified embodiment, the outer shell portion 20 comprises a main body portion 2 and a lid portion 3, but the outer shell portion 20 may be composed of only one member. In that case, the outer shell portion 20 is a bottomed cylindrical shape, for example, with the opening 22 in the main body portion 2 closed.
[0054] In this embodiment, the septum 5 is located inside the exposure opening 31, but for example, the septum 5 may be located inside the outer shell portion 20 and positioned on the inner surface of the outer shell to close the exposure opening 31.
[0055] In this embodiment, the septum 5 and the lid 3 are made of different materials, but for example, if the lid 3 is made of a rubber material that has shape recovery properties, the lid 3 may also serve as the septum 5. The sampling container 1 does not necessarily have to have a septum 5.
[0056] The position and size of the inlet 6 are not limited to this embodiment. The inlet 6 can be formed at an appropriate position in the outer shell 20, as long as it allows passage between the inside 242 of the housing 4 in the internal space 24 and the outside of the outer shell 20.
[0057] The position and size of the exhaust port 23 are not limited to this embodiment. The exhaust port 23 can be formed at an appropriate position on the outer shell 20, as long as it allows a connection between the outside 241 of the housing 4 in the internal space 24 and the outside of the outer shell 20.
[0058] The sheet material 41 constituting the containment section 4 may have rubber elasticity, allowing the containment section 4 to reversibly expand and contract. In this case, the containment section 4 can expand or contract in accordance with the amount of gas contained within it.
[0059] The housing section 4 may be fixed to the outer shell section 20. In that case, the housing section 4 may be fixed to the main body section 2, fixed to the lid section 3, or fixed to both the main body section 2 and the lid section 3. Furthermore, the housing section 4 may be detachable from the outer shell section 20, for example, when removing the lid section 3 from the main body section 2, the housing section 4 may be detached from the outer shell section 20.
[0060] The sampling device 7 in this embodiment has multiple placement sections 9, but the sampling device 7 may have only one placement section 9.
[0061] If the sampling device 7 has multiple arrangement sections 9, the multiple arrangement sections 9 may be connected in series or in parallel to the pressure reducing device 10 by a pressure reducing path 83.
[0062] The statement that multiple configuration units 9 are connected in series means that the intake ports 92 of each of the multiple configuration units 9 are connected to a pressure reducing passage 83 that does not have branches (see Figure 5). In this embodiment, the multiple configuration units 9 are connected in series to the pressure reducing device 10 by the pressure reducing passage 83.
[0063] The arrangement of multiple units 9 being connected in parallel means that the pressure reducing passage 83 branches into multiple branch passages 831, and each of the multiple branch passages is connected to an air intake port 92 of the arrangement unit 9 (see Figure 6). In this case, each of the multiple branch passages 831 may be equipped with an on / off valve 832 that opens and closes the gas flow between the air intake port 92 of the arrangement unit 9 and the pressure reducing device 10. In this case, by appropriately opening and closing the on / off valve 832, a sampling container 1 to be used for gas collection can be selected from a plurality of sampling containers 1 arranged in the sampling device 7.
[0064] Furthermore, the pressure reducing passage 83 may branch into a plurality of branch passages 831, and each of the plurality of branch passages 831 may be connected to one of the plurality of intake ports 92 of the arrangement section 9 (see Figure 7). In this case as well, each of the plurality of branch passages 831 may be equipped with an on / off valve 832 that opens and closes the flow of gas between the intake port 92 in the arrangement section 9 and the pressure reducing device 10.
[0065] 7. As shown in the embodiments and modifications, the present disclosure includes the following embodiments:
[0066] The sampling container (1) of the first embodiment comprises an outer shell (20) and a housing (4). The outer shell (20) has an internal space (24), an exhaust port (23), and an inlet (6). The housing (4) is a bag made of a flexible sheet material (41) and is placed in the internal space (24), with the inside (242) and outside (241) of the housing (4) in the internal space (24) being airtightly sealed by the sheet material (41). The exhaust port (23) allows the outside (241) of the housing (4) in the internal space (24) to pass through to the outside of the outer shell (20). The inlet (6) allows the inside (242) of the housing (4) in the internal space (24) to pass through to the outside of the outer shell (20).
[0067] In this embodiment, by reducing the pressure in the internal space (24) through the exhaust port (23), the pressure difference deforms the containment section (4) so that the internal volume (242) increases, allowing the gas from outside the sampling container (1) to flow into the containment section (4) through the inlet (6). This makes it possible to collect the gas while suppressing fluctuations in its component composition and to store it in the containment section (4) of the sampling container (1).
[0068] In a second embodiment, as in the first embodiment, the inlet (6) is provided with a check valve (61) that allows the flow of gas from outside the outer shell (20) to inside the housing (4) (242).
[0069] In a third embodiment, in the first or second embodiment, the outer shell (20) comprises a cylindrical body (2) having an exhaust port (23) and an opening (22) on the opposite side of the exhaust port (23), and a lid (3) attached to the body (2) so as to close the opening (22).
[0070] In the fourth embodiment, the lid (3) has an inlet (6) as in the third embodiment.
[0071] In the fifth embodiment, in any one of the first to fourth embodiments, the sampling container (1) further comprises a septum (5) which is arranged to separate the outside of the outer shell (20) from the inside (242) of the housing (4).
[0072] In the sixth aspect, as in the fifth aspect, the outer shell (20) comprises a cylindrical body (2) having an exhaust port (23) and an opening (22) on the opposite side of the exhaust port (23), and a lid (3) attached to the body (2) so as to close the opening (22). The lid (3) has an exposure opening (31) that exposes the septum (5) to the outside of the outer shell (20).
[0073] In the seventh embodiment, in any one of the first to sixth embodiments, the sampling container (1) has a cylindrical external shape with a diameter of 11 mm or more and 22 mm or less.
[0074] The sampling device (7) according to the eighth embodiment includes a placement section (9) on which a sampling container (1) according to any one of the first to seventh embodiments is detachably arranged, and an intake mechanism that sucks the gas in the internal space (24) of the sampling container (1) through an exhaust port (23) when the sampling container (1) is placed in the placement section (9).
[0075] In this embodiment, the sampling device (7) reduces the pressure in the internal space (24) of the sampling container (1) through the exhaust port (23), causing the containment section (4) to deform due to the pressure difference so that the internal volume (242) increases, allowing the gas from outside the sampling container (1) to flow into the containment section (4) through the inlet (6). This makes it possible to collect the gas while suppressing fluctuations in its component composition and to contain it in the containment section (4) of the sampling container (1).
[0076] In the ninth aspect, as in the eighth aspect, the intake mechanism includes a depressurization passage (83), an intake port (92) that allows air to pass through the exhaust port (23) of the sampling container (1) placed in the arrangement section (9) to the depressurization passage (83), and a depressurization device (10) that depressurizes the depressurization passage (83).
[0077] In the tenth embodiment, as in the eighth or ninth embodiment, the sampling device (7) comprises a plurality of arrangement units (9). The plurality of arrangement units (9) are connected in series or in parallel to the pressure reducing device (10) by pressure reducing passages (83).
[0078] The sampling kit (70) of the eleventh embodiment comprises a sampling container (1) of any one of the first to seventh embodiments and a sampling device (7) of any one of the eighth to tenth embodiments.
[0079] In this embodiment, the sampling device (7) reduces the pressure in the internal space (24) of the sampling container (1) through the exhaust port (23), causing the containment section (4) to deform due to the pressure difference so that the internal volume (242) increases, allowing the gas from outside the sampling container (1) to flow into the containment section (4) through the inlet (6). This makes it possible to collect the gas while suppressing fluctuations in its component composition and to contain it in the containment section (4) of the sampling container (1).
[0080] The sampling method of the twelfth embodiment includes exposing the inlet (6) of the sampling container (1) of any one of the first to seventh embodiments to the gas to be sampled located outside the sampling container (1), and then reducing the pressure outside (241) of the containment section (4) in the internal space (24) to cause the gas to flow into the containment section (4) from the inlet (6).
[0081] According to this embodiment, the gas can be collected while suppressing fluctuations in its component composition and stored in the storage section (4) of the sampling container (1).
[0082] The thirteenth embodiment of the analysis method includes extracting the gas in the containment section (4) of the sampling container (1) of any one of the first to seventh embodiments using an autosampler and supplying it to an analytical instrument.
[0083] 1 Sampling container 20 Outer shell 2 Main body 22 Opening 23 Exhaust port 24 Internal space 241 Exterior 242 Interior 3 Lid 31 Exposed opening 4 Housing section 41 Sheet material 5 Septum 6 Inlet 61 Check valve 70 Sampling kit 7 Sampling device 83 Pressure reducing passage 9 Arrangement section 92 Air intake 10 Pressure reducing device
Claims
1. A sampling container comprising an outer shell and a housing, wherein the outer shell has an internal space, an exhaust port, and an inlet, the housing is a bag made of a flexible sheet material and is placed within the internal space, the space between the inside and outside of the housing in the internal space is airtight with the sheet material, the exhaust port allows the outside of the housing in the internal space to pass through to the outside of the outer shell, and the inlet allows the inside of the housing in the internal space to pass through to the outside of the outer shell.
2. The sampling container according to claim 1, wherein the inlet is equipped with a check valve that allows the flow of gas from the outside of the outer shell to the inside of the housing.
3. The sampling container according to claim 1, wherein the outer shell comprises a cylindrical main body having an exhaust port and an opening on the opposite side of the exhaust port, and a lid attached to the main body so as to close the opening.
4. The sampling container according to claim 3, wherein the lid portion has the inlet.
5. The sampling container according to claim 1, further comprising a septum disposed to separate the outside of the outer shell from the inside of the housing.
6. The sampling container according to claim 5, wherein the outer shell comprises a cylindrical main body having an exhaust port and an opening on the opposite side of the exhaust port, and a lid attached to the main body so as to close the opening, and the lid has an opening that exposes the septum to the outside of the outer shell.
7. The sampling container according to claim 1, having a cylindrical external shape with a diameter of 11 mm or more and 22 mm or less.
8. A sampling device comprising: an arrangement section in which the sampling container described in claim 1 is detachably arranged; and an intake mechanism for drawing in the gas in the internal space of the sampling container through the exhaust port when the sampling container is arranged in the arrangement section.
9. The sampling apparatus according to claim 8, wherein the intake mechanism comprises a depressurization passage, an intake port that allows air to pass through the exhaust port of the sampling container positioned in the arrangement section to the depressurization passage, and a depressurization device that depressurizes the depressurization passage.
10. The sampling device according to claim 9, comprising a plurality of the arrangement units, wherein the plurality of arrangement units are connected in series or in parallel to the pressure reducing device by the pressure reducing passage.
11. A sampling kit comprising the sampling container described in claim 1 and the sampling device described in claim 8.
12. A sampling method comprising exposing the inlet of a sampling container according to any one of claims 1 to 7 to a gas to be sampled located outside the sampling container, and reducing the pressure outside the containment in the internal space to cause the gas to flow into the containment from the inlet.
13. An analytical method comprising extracting the gas in the containment section of the sampling container according to any one of claims 1 to 7 using an autosampler and supplying it to an analytical instrument.