Gas permeation cell, sample fixing jig, gas permeability measuring device, and gas permeability measuring method

Abstract

To provide a gas transmission cell, etc. capable of measuring gas permeability of samples of various shapes.SOLUTION: The gas transmission cell includes a sample fixing jig, a sample fixing auxiliary member, and a detection chamber. The sample fixing jig is attached to the detection chamber in a detachable manner. The gas transmission cell includes the sample fixing jig and the detection chamber. A body portion of an O-ring type coupling is fixed on the sample fixing jig so that the body portion of the O-ring type coupling is connected to an opening part.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a gas permeation cell, a sample fixing jig, a gas permeability measuring device, and a gas permeability measuring method. [Background technology]

[0002] The measurement samples used in measuring the permeability of gases such as water vapor and oxygen have mainly been flat samples such as films, sheets, etc. For example, Patent Document 1 discloses a gas barrier testing method in which a flat sample such as a film is fixed in a curved state and a gas barrier test is performed.

[0003] In recent years, gas permeation measurement tests of products themselves, such as finished products, have become more common. For example, Patent Documents 2 to 4 disclose a gas permeation measurement tool for a sample having a three-dimensional shape, such as a packaging container. Patent Document 5 discloses a method for improving the measurement accuracy of gas barrier properties by conditioning a plastic molded body by removing the influence of moisture through heating or the like before measuring the gas to be measured that has permeated the plastic molded body. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2018-21813 A (Published on February 8, 2018) [Patent Document 2] JP 2012-58219 A (Published March 22, 2012) [Patent Document 3] JP 2006-47257 A (Published February 16, 2006) [Patent Document 4] Japanese Patent Application Publication No. 11-304630 (published on November 5, 1999) [Patent Document 5] International Publication No. 2004 / 077006 (Published on September 10, 2004) Summary of the Invention [Problem to be solved by the invention]

[0005] When measuring the gas permeability of a sample having a three-dimensional shape, it is necessary to prepare a measuring device dedicated to the sample having the three-dimensional shape. The measuring tools of Patent Documents 2 to 4 may not be suitable for measuring samples of various shapes. In addition, Patent Document 5 may be expensive. In addition, it is necessary to take into account measurement errors between detectors, and it is desirable to develop a device that can measure the gas permeability of samples of various shapes using the same device and detector.

[0006] An object of one embodiment of the present invention is to provide a gas permeation cell capable of measuring the gas permeability of samples of various shapes. [Means for solving the problem]

[0007] The present inventors have found that the above object can be achieved by employing the following configuration, and have completed the present invention.

[0008] That is, the present invention is a gas permeation cell for measuring the permeability of a target component contained in a gas through a sample, the gas permeation cell comprising: a first surface and a second surface, and an opening penetrating from the first surface to the second surface, a sample fixing jig that closes the opening and fixes the sample so that the sample is exposed to both the first surface side and the second surface side, and a detection chamber that has a recess surrounding the opening from the second surface side and supplies a detection gas to the inside of the recess, and the sample fixing jig is detachably attached to the detection chamber. Effect of the Invention

[0009] According to the present invention, it is possible to provide a gas permeation cell capable of measuring the gas permeability of samples of various shapes. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a schematic diagram showing an example of a gas permeability measuring device according to an embodiment of the present invention. [Diagram 2]FIG. 2 is a partially enlarged view showing an example of a gas permeation cell according to the present embodiment. [Diagram 3] FIG. 2 is a partially enlarged view showing an example of a gas permeation cell according to the present embodiment. [Figure 4] FIG. 2 is a partially enlarged view showing an example of a gas permeation cell according to the present embodiment. [Diagram 5] FIG. 2 is a partially enlarged view showing an example of a gas permeation cell according to the present embodiment. [Figure 6] FIG. 2 is a partially enlarged view showing an example of a gas permeation cell according to the present embodiment. [Figure 7] FIG. 2 is a diagram showing an example of a gas permeation cell according to the present embodiment. [Figure 8] FIG. 2 shows an example of a gas permeation cell according to the present embodiments with the supply chamber removed. [Figure 9] FIG. 2 is a diagram showing an example of a sample of a gas permeation cell according to the present embodiment. [Figure 10] FIG. 2 is a diagram showing an example of a gas permeation cell according to the present embodiment. [Figure 11] FIG. 2 is a diagram showing an example of a gas permeation cell according to the present embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] <Gas permeability measuring device 200> An embodiment of the present invention will be described below with reference to FIG. 1. FIG. 1 is a schematic diagram showing a gas permeability measuring device 200 according to an embodiment. As shown in FIG. 1, the gas permeability measuring device 200 includes a gas permeation cell 100 and a detection unit 13. The gas permeability measuring device 200 may include a storage unit (not shown) for storing the gas permeation cell 100. In the gas permeability measuring device 200, when the gas permeation cell 100 is stored, the first surface 1a and the supply chamber 2 are arranged on the upper side of the paper in FIG. 1, and the second surface 1b and the detection chamber 6 are arranged on the lower side of the paper. However, in the gas permeability measuring device according to an embodiment, the gas permeation cell may have a sample fixing jig arranged between the supply chamber and the detection chamber. For example, the detection chamber may be arranged above the supply chamber, and the detection chamber and the supply chamber may be arranged side by side with the sample fixing jig fixed.

[0012] [Gas permeation cell 100] The gas permeation cell 100 includes a sample fixing jig 1, a supply chamber 2, and a detection chamber 6. The sample fixing jig 1 is disposed between the supply chamber 2 and the detection chamber 6, which is disposed opposite the supply chamber 2, and a sample 10 is fixed to the sample fixing jig 1.

[0013] (Sample Fixture 1) As shown in FIG. 1, the sample fixing jig 1 has a first surface 1a, a second surface 1b, and an opening (the inner surface of the opening is referred to as a third surface 1c). The sample fixing jig 1 is preferably a flat plate-shaped jig (member) with the first surface 1a and the second surface 1b parallel to each other, and an opening penetrating from the first surface 1a to the second surface 1b is provided near the center of the plate-shaped jig, and the peripheral portion of the first surface 1a closes the opening of the supply recess 5 of the supply chamber 2, and the peripheral portion of the second surface 1b closes the opening of the recess 9 of the detection chamber 6. The sample fixing jig 1 is detachably attached to the detection chamber 6. Since the sample fixing jig 1 is detachable from the detection chamber 6, it is only necessary to replace the sample fixing jig 1 according to the shape and size of the sample, and there is no need to prepare a measuring device dedicated to the sample. The material of the sample fixing jig 1 may be a material having a lower gas permeability than the sample, and examples of the material include metal and ceramics.

[0014] 1, the sample-fixing jig 1 has an opening penetrating (communicating) from the first surface 1a to the second surface 1b. The sample 10 is fixed to the opening of the sample-fixing jig 1 so as to close the opening. It is sufficient that the sample 10 and the third surface 1c of the opening are fixed without any gaps, and for example, an adhesive, grease, sealant (not shown), or the like may be filled in the gap between the sample 10 and the third surface 1c.

[0015] The sample fixing jig 1 is detachably fixed to the detection chamber 6 so that the sample 10 is exposed to both the first surface 1a side (supply recess 5 side) and the second surface 1b side (recess 9 side) of the sample fixing jig 1 with the sample 10 closing the opening 1c of the sample fixing jig 1. In this state, the gas permeation cell 100 is separated from the supply recess 5 (first space) and the recess 9 (second space) of the gas permeation cell 100 fixed to the sample fixing jig 1.

[0016] With the above configuration, the sample 10 fixed to the sample fixing jig 1 can be exposed to a target gas (gas, first gas) on the first surface 1a side (supply recess 5 side) and simultaneously exposed to a detection gas (second gas) on the second surface 1b side (recess 9 side).

[0017] (Supply Chamber 2) The supply chamber (gas supply chamber) 2 has a supply recess 5 therein to which a target gas is supplied. The supply chamber 2 is attached so that the supply recess 5 surrounds the opening 1h from the first surface 1a side of the sample fixing jig 1, and the opening of the supply recess 5 is closed by the sample fixing jig 1.

[0018] The target gas is a gas containing a target component to be measured. Examples of the target gas include inorganic gases such as water vapor, oxygen, nitrogen, helium, hydrogen, argon, carbon dioxide, and carbon monoxide; organic gases such as methane; and the like.

[0019] The supply recess 5 is provided with a first supply port 3 for supplying the target gas and a first exhaust port 4 for exhausting the target gas. The first supply port 3 and the first exhaust port 4 may each be provided at the top or side of the supply recess 5. Furthermore, each of the first supply port 3 and the first exhaust port 4 may be one or more.

[0020] In the example of FIG. 1, the target gas is supplied from the first supply port 3 of the supply recess 5 in the direction of the arrow 12a, and the supply recess 5 is filled with the target gas. Then, the target gas is exhausted from the first exhaust port 4 of the supply recess 5 in the direction of the arrow 12b. At this time, inside the supply recess 5, the sample 10 exposed on the first surface 1a side of the sample fixing jig 1 is exposed to the target gas. In the example of FIG. 1, the target gas is supplied in the direction of the arrow 12c. Also, the gas that has permeated the sample 10 reaches in the direction of the arrow 12d.

[0021] (Detection Chamber 6) The detection chamber (detection gas chamber) 6 includes a recess 9 surrounding the opening from the second surface 1b side of the sample fixing jig 1. The recess 9 of the detection chamber 6 is provided at a position facing the supply recess 5 with the sample 10 in between. A detection gas is supplied to the inside of the recess 9 of the detection chamber 6. At this time, inside the recess 9 of the detection chamber 6, the sample 10 exposed to the second surface 1b side of the sample fixing jig 1 is exposed to the target gas.

[0022] The detection gas includes a carrier gas that carries the target gas and the target component contained in the target gas to the detection unit. The carrier gas is not particularly limited as long as it is inert to the target gas containing the target component to be measured. Examples of the carrier gas include nitrogen, argon, helium, oxygen, and other gases. In addition, in the gas permeability measurement device including the gas permeation cell according to one embodiment, instead of filling the recess 9 with the detection gas, the recess 9 may be placed in a vacuum state to evaluate the gas permeability.

[0023] The recess 9 of the detection chamber 6 is provided with a second supply port 7 for supplying the detection gas and a second exhaust port 8 for discharging the detection gas. The second supply port 7 and the second exhaust port 8 may each be provided at the bottom or side of the recess 9. Furthermore, the number of the second supply port 7 and the second exhaust port 8 may each be one or more.

[0024] In the example of Fig. 1, the detection gas is supplied from the second supply port 7 of the recess 9 in the direction of the arrow 12e, and the detection gas fills the recess 9. Then, the detection gas is exhausted from the second exhaust port 8 of the recess 9 in the direction of the arrow 12f. The second exhaust port 8 is connected to the detection unit of the gas permeability measuring device 200. In the example of Fig. 1, the target gas is supplied in the direction of the arrow 12c, and passes through the sample 10, arriving in the direction of the arrow 12d, and reaches the detection unit 13 together with the detection gas via the second exhaust port 8.

[0025] [Sample 10] The sample 10 may be a flat sample or a three-dimensional sample. The sample fixing jig 1 may be replaced according to the shape of the sample 10, and samples of different shapes can be measured without changing the volume of the gas permeation cell 100. The sample fixing jig 1 can be replaced easily and quickly, at low cost, and samples of various shapes can be measured. Furthermore, the gas permeation cell 100 according to this embodiment makes it possible to compare the gas permeability of the product itself with the gas permeability of the members constituting the product.

[0026] [Detection unit 13] The detection unit (detector) 13 detects the target component that has permeated the sample and reached the detection chamber 6. That is, the detection unit 13 detects the target gas (target gas) that has permeated the sample from the supply recess 5 and reached the recess 9. The detection unit 13 may be any one that can detect the target gas carried by the carrier gas, and a known detection means may be appropriately selected according to the detection target. For example, when water vapor is detected as the target gas, a known moisture meter may be used as the detection unit 13. Other examples of the detection unit include detection devices such as atmospheric pressure ionization mass spectrometers, mass spectrometers, oxygen concentration meters, dew point meters, gas sensors, detector tubes, and infrared absorption spectrometers. The detection unit may further include a gas collection kit for collecting the target component contained in the detection gas, and the target component collected by the gas collection kit may be detected by GC-MS (gas chromatography-mass spectrometry), HPLC (high performance (high pressure) liquid chromatography), and IC (ion chromatography).

[0027] The gas permeability measuring device 200 includes a gas permeation cell 100. With the gas permeation cell 100 housed therein, the gas permeability measuring device 200 detects a target gas (target gas) that has permeated through a sample 10 using a detection unit 13, and measures the permeability of the sample to the target gas. With the gas permeation cell 100 housed therein, the gas permeability measuring device 200 may include an adjustment unit (not shown) that adjusts the temperature, humidity, and the like inside the supply recess 5 and the recess 9.

[0028] According to the gas permeability measurement device 200, it is only necessary to change the sample fixing jig in the gas permeation cell 100 according to the shape and size of the sample, and there is no need to prepare a measurement device dedicated to the sample. Therefore, it is highly versatile.

[0029] The gas permeability measuring device 200 may include a moving part (not shown) for moving at least one of the supply chamber 2 and the detection chamber 6 to which the sample fixing jig 1 to which the sample is fixed is fixed, so as to open the supply recess 5 surrounding the opening 1c from the first surface 1a side. By providing the moving part, the supply chamber can be easily removed from the gas permeation cell when measuring the gas permeability of the sample while applying a load to the sample.

[0030] <Gas permeability measurement method> The gas permeability measurement method according to this embodiment includes a detection step of supplying a target gas to the gas permeation cell 100 and detecting a target component that has permeated the sample and reached the detection chamber 6. By using the gas permeation cell 100, it is possible to measure the gas permeability of samples of various shapes. Therefore, the scope of the present invention also includes a method of measuring gas permeability using a gas permeation cell according to one embodiment of the present invention.

[0031] <Sample Fixture According to Another Embodiment> The gas permeation cell according to this embodiment and the sample fixing jig included in the gas permeation cell are not limited to the above-mentioned embodiment. An example of fixing to the sample fixing jig will be described below with reference to Figures 2 to 6. Figures 2 to 6 are schematic diagrams showing the sample fixing jig to which the sample is fixed.

[0032] [Sample Fixture 11] 2, a side surface of a cylindrical sample 20 is fixed to the inside of an opening 11h of the sample fixing jig 11. That is, the sample 20 is fixed to a third surface 11c of the sample fixing jig 11 by a sample fixing auxiliary member 14. A first surface 11a of the sample fixing jig 11 is exposed to the supply recess 5 side, and a second surface 11b is exposed to the recess 9 side. This fixation separates the supply recess 5 and the recess 9 of the gas permeation cell 100.

[0033] (Sample fixing auxiliary member 14) The sample fixing auxiliary member 14 fixes the sample 20 to any one of the first surface 11a, the second surface 11b, and the third surface 11c of the opening 11h of the sample fixing jig. Examples of the sample fixing auxiliary member 14 include a packing and a plate such as a metal plate that can be fitted into the opening 11c.

[0034] 2, the third surface 11c of the sample fixing jig 11 is inclined at an acute angle with respect to the second surface 11b. This configuration makes it easier to fix the sample 20 to the third surface 11c via the sample fixing auxiliary member .

[0035] Further, a tap (thread, not shown) is provided on the third surface 11c of the opening 11h, and a thread (not shown) may be provided on the side surface of the sample fixation auxiliary member 14 so as to be screwed into the tap. By using such a sample fixation auxiliary member 14, the sample can be firmly fixed by the sample fixation jig 11, and the opening 11h can be closed by the sample 20. Furthermore, for example, the third surface 11c constituting the opening 11h and the side surface of the sample fixation auxiliary member 14 may be formed with high surface accuracy so that when the opening 11h is closed by the sample fixation auxiliary member 14, the third surface 11c and the side surface of the sample fixation auxiliary member 14 are attracted to each other and thus sealed.

[0036] [Sample Fixture 21] 3, sample fixing jig 21 fixes sample 30 by sample fixing auxiliary member 24 such that sample 30 is disposed inside supply recess 5 on the first surface 21a side, and at this time, sample 30 is exposed from the inside of opening 21h toward the second surface 21b side. Sample 30 is fixed to cover opening 21h of sample fixing jig 21, and supply recess 5 (first surface 21a side) and recess 9 (second surface 21b side) of gas permeation cell 100 are separated.

[0037] (Sample fixing auxiliary member 24) In the example of Fig. 3, the sample 30 is fixed to the first surface 21a of the sample fixing jig 21 by the sample fixing auxiliary member 24. The sample fixing auxiliary member 24 may be a metal plate or the like having an annular structure so that the sample 30 can be exposed to the target gas. The sample fixing auxiliary member 24 and the sample fixing jig 21 are fixed to the sample fixing jig 21 so as to sandwich the sample 30 with an annular packing 24a disposed between the sample fixing auxiliary member 24 and the sample 30 and an annular packing 24b disposed between the sample fixing jig 21 (first surface 21a) and the sample 30, and the sample 30 is sandwiched between the sample fixing jig 21 and the sample fixing jig 21 by tightening the bolt (auxiliary member fixing member) 15.

[0038] [Sample Fixture 31] 4, in the sample fixing jig 31, the sample 40 is sandwiched between the sample fixing jig 31 and a sample fixing auxiliary member 34 such as a metal plate, and the sample 40 is clamped by tightening a bolt (auxiliary member fixing member) 25. The sample 40 is a sample having an annular structure such as a gasket, and the sample 40 is fixed so that the outer peripheral surface of the annular structure is exposed on the groove portion 31i side of the sample fixing jig 31 and the inner peripheral surface of the annular structure is exposed on the third surface 31l side of the sample fixing jig 31. Furthermore, by this fixation, the opening 31h is closed by the sample fixing auxiliary member 34 and the sample 40. This separates the supply recess 5 and the recess 9 of the gas permeation cell 100.

[0039] The sample fixing auxiliary member 34 is fixed to the lower surface 31e of the sample fixing jig 31 by bolts 25. The auxiliary member fixing member 25 is provided between the sample 40 and the step surface 31d. The sample 40 is provided on the lower surface 31e. By providing the groove 31i in the sample fixing jig 31, at least a part of the sample 40 is fixed inside the groove 31i of the sample fixing jig 31, so that even if the sample 40 has a thickness, the sample 40 can be prevented from interfering with the supply chamber in the gas permeation cell.

[0040] [Sample Fixture 41] As an example in FIG. 5, an O-ring joint including an O-ring 50, a blind nut 44, and a body portion 54 is fixed to a sample fixing jig 41 by, for example, welding.

[0041] In the sample fixing jig 41, the O-ring 50 is placed in the body portion 54 of the O-ring joint and fixed to the sample fixing jig 41, and the gas permeation evaluation can be performed with the inside of the O-ring 50 sealed with the blind nut 44. Here, the O-ring 50 is exposed to the second surface 41b side of the sample fixing jig 41 and fixed so as to be exposed to the detection gas introduced from the opening 41h of the sample fixing jig 41. In addition, the O-ring 50, while covered by the blind nut 44, is exposed to the first surface 41a side of the sample fixing jig 41 in the gap between the body portion 54 and the blind nut 44 and is exposed to the target gas. That is, the O-ring joint is put into a state in which it can be used as a product, and the total of (i) the target gas that has permeated through the O-ring 50 itself, (ii) the target gas that has leaked (emitted) from the gap between the body portion 54 and the O-ring 50, and (iii) the target gas that has leaked from the gap between the blind nut 44 and the O-ring 50 in the O-ring joint can be detected, and the degree of permeation and leakage of the target gas can be evaluated based on the total of the detected target gases. Thus, gas permeation in an actual usage environment can be evaluated.

[0042] In addition, for example, by opening the supply chamber 2 during a gas permeability evaluation test and changing the tightening torque of the blind nut 44, it is possible to evaluate the change in the degree of permeability and leakage of the target gas in the O-ring fitting that accompanies the change in torque.

[0043] [Sample Fixture 51] As an example of FIG. 6, the O-ring 50 is covered with a blind nut 44 having an opening in the sample fixing jig 51, and the gas permeability is evaluated in a state where the opening of the blind nut 44 is blocked with a leak test material 16. Here, the O-ring 50 is fixed so as to be exposed to the second surface 51b of the sample fixing jig 51 and exposed to the detection gas. In addition, the O-ring 50 is exposed to the first surface 51a of the sample fixing jig 51 in the gap between the body part 54 and the blind nut 44 while covered with the blind nut 44, and is exposed to the target gas. That is, the O-ring joint is placed in a state where it can be used as a product, and the total of (i) the target gas that has permeated through the O-ring 50 itself, (ii) the target gas that has leaked (leaked) from the gap between the body part 54 and the O-ring 50, and (iii) the target gas that has leaked from the gap between the blind nut 44 and the O-ring 50 can be detected, and the degree of permeation and leakage of the target gas can be evaluated based on the total of the detected target gases. This makes it possible to evaluate gas permeability in the actual usage environment.

[0044] Furthermore, by providing a leak test material 16 and, for example, opening the supply chamber 2 during the gas permeability evaluation test and changing the tightening torque of the blind nut 44, it is possible to evaluate the change in the permeability and leak level of the target gas in the O-ring joint that accompanies the change in torque, in the same way as in the case of the sample fixing jig 41. Note that examples of the leak test material 16 include test materials that are impermeable, such as metal rods and glass rods.

[0045] <Gas permeation cell according to another embodiment> The sample fixing jig 1 only needs to be fixed in an airtight manner to each of the supply chamber 2 and the detection chamber 6. For example, in the example of FIG. 7, the sample fixing jig 1 is fixed by a plurality of jig fixing members 17 at the peripheral portion of the supply chamber 2 and the peripheral portion of the detection chamber 6.

[0046] In the example of FIG. 7, the two jig fixing members 17 may be bolts that penetrate the side wall of the supply recess 5 from outside the supply chamber 2 and fix the supply chamber 2 and the sample fixing jig 1. The two jig fixing members 17 may be bolts that penetrate the side wall of the recess 9 in the detection chamber 6 and fix the detection chamber 6 and the sample fixing jig 1. Examples of jig fixing members other than bolts include clamps. By fixing the sample fixing jig 1 with the jig fixing members 17, it is possible to fix the sample fixing jig 1 to the supply chamber 2 and the detection chamber 6 easily and with high airtightness.

[0047] 8, sample fixing jig 1 is fixed to detection chamber 6 by jig fixing member 17. Supply chamber 2 is removed (opened) with the sample fixed to gas permeation cell 100. When supply chamber 2 is removed (opened), a load is applied to sample 10 as described below, and the gas permeability of sample 10 after the load is applied can be measured.

[0048] Furthermore, by allowing the supply chamber 2 to be removed while the sample is fixed in the gas permeation cell 100, the gas permeation of the sample when exposed to the atmosphere can be evaluated and compared with the gas permeation of a sample not exposed to the atmosphere.

[0049] <Fixation of syringe 60 by gas permeation cell 100> The gas permeation cell 100 according to this embodiment can measure the gas permeation of a syringe (sample) 60 shown in Fig. 9. Conventional gas permeation cells or gas permeability measuring devices can only measure the gas permeation of the entire syringe. Furthermore, conventional techniques cannot perform background measurements, which will be described later.

[0050] (Syringe 60) In the case of the gas permeation cell 100 according to the present embodiment, as in the example of FIG. 10, it is possible to evaluate the gas permeation of the syringe 60 (the syringe body 62, the cap 65, and the connection part 66) in a state where the plunger 63 is removed. As the connection part 66, for example, a resin or glass connection part such as a syringe needle can be mentioned. For example, the resin or glass connection part may be integrally molded with the syringe 60, and when the connection part 66 is made of resin, it may be provided with a screw thread to screw with the cap 65. Also, as in the example of FIG. 11, it is possible to evaluate the gas permeation of the syringe 60 (the syringe body 62, the plunger 63, and the connection part 66) in a state where the cap 65 is removed. Also, by using the gas permeation cell 100 according to the present embodiment, it is possible to perform the gas permeation evaluation of the syringe in a shorter time than before.

[0051] 10 and 11, the side surface of the syringe body 62 is fixed to the inside of the opening 61h of the sample fixing jig 61. That is, the syringe 60 is fixed to the third surface 61c of the sample fixing jig 61 by a sample fixing auxiliary member 64 such as a rubber packing.

[0052] Moreover, by changing the orientation and fixing position of the syringe 60 fixed to the sample fixing jig 61, it is possible to measure the gas permeability of a portion where gas permeation is to be evaluated.

[0053] <Gas permeability measurement method according to another embodiment> The gas permeability measurement method according to the embodiment is not limited to the above embodiment. For example, in the gas permeability measurement method according to the present embodiment, the target component that has reached the detection chamber 6 may be measured while applying a load to the sample in the detection step.

[0054] 8, in a gas permeability measurement method according to another embodiment, the supply chamber 2 in the gas permeability cell 100 is removed (opened) in the gas permeability measurement device 200. This allows a load to be applied to a portion of the sample 10 fixed to the gas permeability cell 100 that is exposed to the first surface 1a. Examples of the load include a change in torque; application of vibration, scratches, light, heat, etc.; immersion in liquids such as salt water, organic solvents, hot water, and corrosive liquids; contact with solids such as ice and metals; and the like.

[0055] That is, in the gas permeability measurement method according to another embodiment of the present invention, a multi-stage evaluation of the sample under various environmental conditions is possible by measuring the target component that has reached the detection chamber 6 while applying a load to the sample 10 in the detection step. For example, it is possible to measure the change in gas permeability associated with the change in shape caused by applying a load to the sample.

[0056] [Gas permeability measurement method according to still another embodiment] The gas permeability measurement method according to still another embodiment of the present invention may include a step other than the detection step. The other step includes a background measurement step.

[0057] (Background measurement process) In the background measurement step, before exposing the sample to the target gas, the sample is exposed to a detection gas from at least one of the first surface 1a side and the second surface side, and the amount of the target component contained in the detection gas supplied into the detection chamber 6 is measured. By performing the background measurement step, the accuracy of the gas permeation measurement is improved.

[0058] 〔summary〕 The gas permeation cell of this embodiment is a gas permeation cell for measuring the permeability of a target component contained in a gas through a sample, and comprises a first surface and a second surface, and an opening penetrating from the first surface to the second surface, a sample fixing jig that closes the opening and fixes the sample so that the sample is exposed to both the first surface side and the second surface side, and a detection chamber (detection gas chamber) that has a recess surrounding the opening from the second surface side and supplies a detection gas to the inside of the recess, and the sample fixing jig is detachably attached to the detection chamber.

[0059] The gas permeation cell according to this embodiment may further include a sample fixation auxiliary member for fixing the sample on any one of the inside, the first surface side, and the second surface side of the opening.

[0060] The gas permeation cell according to this embodiment further includes a supply chamber (gas supply chamber) for supplying the gas, and the supply chamber has a supply recess inside to which the gas is supplied, and the supply chamber may be removably attached so as to surround the opening from the first surface side and close the supply recess.

[0061] In the gas permeation cell according to this embodiment, the sample fixing jig may be fixed to at least one of the detection chamber and the supply chamber by a jig fixing member.

[0062] In the gas permeation cell according to this embodiment, the sample may be a syringe.

[0063] Furthermore, the sample fixing jig according to this embodiment is a sample fixing jig that is detachably attached to the gas permeation cell, and has a first surface and a second surface and an opening that penetrates from the first surface to the second surface, and fixes the sample so that the opening is closed and the sample is exposed to both the first surface side and the second surface side.

[0064] The gas permeability measuring device according to this embodiment also includes the gas permeation cell and a detection section that detects a target component that has permeated the sample and reached the detection chamber.

[0065] The gas permeability measurement method according to this embodiment includes a detection step of supplying the gas to the gas permeation cell and detecting the target component that has permeated the sample and reached the detection chamber.

[0066] In the gas permeability measurement method according to this embodiment, in the detection step, the target component that has reached the detection chamber may be measured while a load is being applied to the sample.

[0067] The gas permeability measurement method according to this embodiment may include a background measurement step of exposing the sample to the detection gas from both the first surface side and the second surface side before exposing the sample to the gas, and measuring the amount of the target component contained in the detection gas supplied into the detection chamber.

[0068] The gas permeability measuring device of this embodiment may include a storage section that stores the gas permeation cell, a moving section that moves the supply chamber so as to open the supply recess surrounding the opening from the second surface side, and a detection section that detects a target component that has permeated the sample and reached the detection chamber.

[0069] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. The technical scope of the present invention also includes embodiments obtained by appropriately combining the technical means disclosed in the different embodiments. Furthermore, new technical features can be formed by combining the technical means disclosed in the respective embodiments. [Industrial Applicability]

[0070] The present invention can be widely used in various fields that require measurement of gas permeability, such as food, medicine, organic EL devices, and solar cells. [Explanation of symbols]

[0071] 1, 11, 21, 31, 31a, 31b, 41, 51, 61 Sample fixing jig 1a, 11a, 21a, 31j, 41a, 51a, 61a 1st side 1b, 11b, 21b, 31k, 41b, 51b, 61b 2nd side 1c, 11c, 21c, 31l, 41c, 51c, 61c 3rd side 1h, 11h, 21h, 31h, 41h, 51h, 61h opening 2 Supply chamber (gas supply chamber) 3 1st supply port 4. First exhaust port 5 Supply recess 6 Detection chamber (detection gas chamber) 7 2nd supply port 8 Second exhaust port 9 Recess 10, 20, 30, 40, 50 samples 12a~12f Gas 13 Detection section 14, 24, 34, 44 Sample fixing auxiliary member 15, 25 Auxiliary component fixing fixture 16 Leak Test Materials 17 Jig fixing parts 31d Step surface 31e Lower side 31i Groove 54 Body 60 Syringe (sample) 62 Syringe body 63 Plunger 65 Cap 66 Connection 100 Gas Permeation Cell 200 Gas Permeability Measuring Device

Claims

1. A gas permeation cell for measuring the permeability of a target component contained in a gas through a sample, comprising: a sample fixing jig having a first surface and a second surface and an opening penetrating from the first surface to the second surface, the opening being closed by the sample, a sample fixing auxiliary member and the sample fixing jig, and the sample fixing jig fixing the sample so that the sample is exposed to both the first surface side and the second surface side; a sample fixing auxiliary member for fixing the sample to either the first surface side or the second surface side; a detection chamber having a recess surrounding the opening from the second surface side and supplying a detection gas to the inside of the recess, The sample is a sample having a cyclic structure, The sample fixing auxiliary member includes a metal plate and a bolt, the sample having the annular structure is sandwiched between the metal plate and the sample fixing jig, and the sample having the annular structure is fixed so as to be sandwiched by tightening the bolt; the sample fixing jig is detachably attached to the detection chamber, Further comprising a supply chamber for supplying the gas, the supply chamber has a supply recess therein to which the gas is supplied, the supply chamber is detachably attached to the gas permeation cell so as to surround the opening from the first surface side and close the supply recess.

2. A gas permeation cell for measuring the permeability of a target component contained in a gas through a sample, comprising: a sample fixing jig having a first surface and a second surface and an opening penetrating from the first surface to the second surface, the opening being closed by the sample and an O-ring joint having a blind nut and a body portion, and fixing the sample so that the sample is exposed to both the first surface side and the second surface side; a detection chamber having a recess surrounding the opening from the second surface side and supplying a detection gas to the inside of the recess, the sample fixing jig is detachably attached to the detection chamber, The sample is an O-ring. a body portion of an O-ring joint having a blind nut and a body portion is fixed to the sample fixing jig so as to communicate with the opening portion; Further comprising a supply chamber for supplying the gas, the supply chamber has a supply recess therein to which the gas is supplied, the supply chamber is detachably attached so as to surround the opening from the first surface side and close the supply recess; Gas permeation cells.

3. The sample fixture further includes a leak test material, The blind nut has an opening, 3. The gas permeation cell according to claim 2, wherein an opening of the blind nut is closed with the leak test material.

4. 2. The gas permeation cell of claim 1, wherein the sample fixture is fixed to at least one of the detection chamber and the supply chamber by a fixture fixing member.

5. A gas permeation cell according to any one of claims 1 to 4; and a detection section for detecting a target component that has permeated the sample and reached the detection chamber.

6. A gas permeability measurement method, comprising the steps of: supplying the gas to the gas permeation cell according to any one of claims 1 to 4; and detecting the target component that has permeated the sample and reached the detection chamber.

7. 7. The gas permeability measurement method according to claim 6, wherein in the detection step, the target component that has reached the detection chamber is measured while a load is being applied to the sample.

8. 8. The gas permeability measurement method according to claim 7, further comprising a background measurement step of exposing the sample to the detection gas from both the first surface side and the second surface side before exposing the sample to the gas, and measuring the amount of the target component contained in the detection gas supplied into the detection chamber.

9. A storage section for storing the gas permeation cell according to claim 1; a moving unit that moves the supply chamber so as to open the supply recess surrounding the opening from the second surface side; and a detection section for detecting a target component that has permeated the sample and reached the detection chamber.

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