JP6520086B2 - sampler - Google Patents

Description

  The present invention relates to a sampler for collecting a substance to be collected suspended in the atmosphere.

  BACKGROUND ART Conventionally, there is known a sampler provided with a cylindrical member formed of a material through which a substance to be collected can pass, and an adsorbent which is filled inside the cylindrical member and can adsorb the substance to be collected. . The sampler is used to collect collected substances (eg, volatile organic compounds) suspended in the atmosphere.

  The sampler is placed in the atmosphere to collect the collected substances suspended in the atmosphere. The substance to be collected suspended in the atmosphere passes through the tubular member and is adsorbed by the adsorbent. The sampler collects the substance to be collected by adsorbing the substance to be collected to the adsorbent filled inside the cylindrical member (see, for example, Patent Document 1 and Patent Document 2).

JP, 2011-203279, A Japanese Patent Application Publication No. 2003-114176

  The sampler is desired to collect as many collected substances as possible. On the other hand, it is desirable that the amount of adsorbent used in the sampler be as small as possible.

  In order for the sampler to collect the collected substance at a higher rate and at a higher speed, it is effective to increase the surface area of the cylindrical member constituting the sampler. However, as the surface area of the tubular member increases, the volume of the tubular member increases. In this case, the amount of adsorbent filled in the cylindrical member increases, and the amount of solvent necessary for extracting the substance to be collected from the adsorbent also increases accordingly. Accordingly, the concentration of the substance to be collected in the extract solution is lowered, which leads to a decrease in the sensitivity of the substance to be collected detected when analyzing the substance to be collected, which is not preferable.

  An object of the present invention is to provide a sampler excellent in operability by suppressing the amount of adsorbent used for filling a cylindrical member and the amount of solvent necessary for extracting a substance to be collected.

In the present invention, a first cylindrical member formed of a first material through which a substance to be collected can pass, and a second material disposed inside the first cylindrical member and through which the substance to be collected can pass Between the second tubular member and the rod-like member inside the second tubular member, and a rod-like member disposed inside the second tubular member, The first tubular member is a tubular member having a bottom at one end and an opening at the other end, The opening at the end is a cylindrical member sealed by a plug member or a cylindrical member having openings at both ends, and the openings at the both ends are cylindrical members sealed by a plug member It relates to a sampler.

  The cross-sectional area of the rod-like member is preferably 35% or more and 75% or less of the inner cross-sectional area of the second cylindrical member.

  The length of the rod-like member is preferably 50% or more of the length of the second tubular member.

  The second material is preferably a breathable sheet.

Preferably, the adsorbent is filled around the rod-like member, and the rod-like member does not contact the inner surface of the second tubular member by the adsorbent filled around the rod-like member.
Further, the present invention is a method of using a sampler, wherein the sampler is disposed in the atmosphere, and the substance to be collected is adsorbed to the adsorbent via the first cylindrical member and the second cylindrical member. And removing the adsorbent from the first tubular member from which the second tubular member, the rod-like member, and the adsorbent to which the substance to be collected is adsorbed are removed from the second tubular member. The present invention relates to a method of using a sampler comprising the steps of: removing the adsorbent to which a substance is adsorbed; and extracting the substance to be collected by adding an extraction solvent to the adsorbent to which the substance to be collected is adsorbed.

  According to the present invention, it is possible to provide a sampler excellent in operability by suppressing the amount of adsorbent used for filling the cylindrical member and the amount of solvent necessary for extracting the substance to be collected.

It is a perspective view of sampler 1 of an embodiment of the present invention. It is a longitudinal cross-sectional view of the sampler 1 of the embodiment of the present invention. (A)-(D) are the figures for demonstrating the assembling method of the sampler 1, (A) is a figure which shows a mode that the rod-shaped member 13 is arrange | positioned to the 2nd cylindrical member 12, (B) is a figure. 2 is a view showing how the cylindrical member 12 is filled with the adsorbent 14, (C) is a view showing the adsorbent unit 20, (D) is arranged the adsorbent unit 20 on the first cylindrical member 11, and a plug member FIG. 15 is a view showing a state in which the reference numeral 15 is attached to the opening of the first cylindrical member 11; (A)-(D) are the figures for demonstrating the usage method of the sampler 1, (A) is a figure which shows a mode that the sampler 1 was arrange | positioned in the room, (B) is a 1st cylindrical member FIG. 11C is a view showing how the adsorbent unit 20 is taken out from 11, and FIG. 12C is a view showing how the adsorbent 14 is taken out from the adsorbent unit 20 and transferred to the test tube 31. It is a graph which shows the result of test 1 of an example.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view of a sampler 1 according to an embodiment of the present invention. FIG. 2 is a longitudinal sectional view of the sampler 1 of the embodiment of the present invention.

  As shown in FIGS. 1 and 2, the sampler 1 of the present embodiment includes a first cylindrical member 11, a second cylindrical member 12, a rod member 13, an adsorbent 14, and a plug member 15. Prepare.

The first cylindrical member 11 is a cylindrical member having a bottom portion formed of porous PTFE (polytetrafluoroethylene) as a first material through which a substance to be collected such as a volatile organic compound can pass. Bottom tube). A void is secured in the first tubular member 11 so as to have a porosity of about 30 to 80%, whereby air permeability is imparted.
The second cylindrical member 12 is a cylindrical member having a bottom portion and formed of an air-permeable sheet as a second material through which a substance to be collected such as a volatile organic compound can pass. The breathable sheet is, for example, a non-woven fabric.

The rod-shaped member 13 is a cylindrical rod made of glass. The cross-sectional area of the rod-like member 13 is, for example, 56% of the inner cross-sectional area of the second tubular member 12. In addition, as described later, the adsorbent 14 is filled around the rod-like member 13. The cross-sectional area of the rod-shaped member 13 means the cross-sectional area of the part with which the adsorbent 14 is filled around.
The length of the rod-like member 13 is substantially the same as the length of the second tubular member 12.

The adsorbent 14 is an adsorbent capable of adsorbing a substance to be collected (for example, a volatile organic compound or the like). The adsorbent is, for example, an inorganic adsorbent or a polymeric adsorbent. The adsorbent 14 may be in the form of particles or fibers, or may be a mixture of different shapes.
The plug member 15 is a cylindrical plug member made of glass, fluorocarbon resin, or a combination of these, and is non-air-permeable.

  As shown in FIG. 2, the second cylindrical member 12 is disposed inside the first cylindrical member 11. The outer shape of the second cylindrical member 12 has a shape close to the inner shape of the first cylindrical member 11. Therefore, the second cylindrical member 12 is in contact with the inner surface of the first cylindrical member 11. The rod-like member 13 is disposed inside the second cylindrical member 12. The adsorbent 14 is filled between the second cylindrical member 12 and the rod-like member 13 inside the second cylindrical member 12. The rod-like member 13 is not in contact with the inner surface of the second cylindrical member 12 by the adsorbent 14 filled around the rod-like member 13. The center of the rod-like member 13 substantially coincides with the center of the second tubular member 12. The plug member 15 is attached to the opening of the first cylindrical member 11 and seals the opening of the first cylindrical member 11. The plug member 15 prevents the second cylindrical member 12, the rod-like member 13 and the adsorbing material 14 from falling off or leaking from the first cylindrical member 11.

  Next, a method of assembling the sampler 1 will be described with reference to FIG. FIG. 3 is a view for explaining the method of assembling the sampler 1, and FIG. 3 (A) is a view showing a state where the rod-like member 13 is disposed on the second cylindrical member 12; FIG. 3 (B) is a second FIG. 3 (C) shows the adsorbent unit 20, and FIG. 3 (D) shows the adsorbent unit 20 disposed in the first cylindrical member 11. FIG. 8 is a view showing how the plug member 15 is attached to the opening of the first cylindrical member 11;

  First, as shown in FIG. 3A, the rod-like member 13 is inserted into the second tubular member 12. Next, as shown in FIG. 3B, the adsorbent 14 is filled between the second cylindrical member 12 and the rod-like member 13 inside the second cylindrical member 12. As shown in FIG. 3C, the rod-like member 13 and the adsorbing material 14 can be added to the second tubular member 12 by filling the adsorbing material 14 between the second tubular member 12 and the rod-like member 13. It is fixed. As a result, the second cylindrical member 12, the rod-like member 13 and the adsorbent 14 become an adsorbent unit 20 that can be handled as an integrated member.

  As shown in FIG. 3 (D), the adsorbent unit 20 is inserted into the inside of the first cylindrical member 11. Thereafter, the opening of the first tubular member 11 is sealed by the plug member 15. The sampler 1 is configured by assembling the first cylindrical member 11, the second cylindrical member 12, the rod member 13, the adsorbing material 14 and the plug member 15 in this manner.

  Next, a method of using the sampler 1 will be described with reference to FIG. FIG. 4 is a view for explaining how to use the sampler 1, and FIG. 4 (A) is a view showing the sampler 1 placed in a room, and FIG. 4 (B) is a first tubular member 11. FIG. 4 (C) is a view showing how the adsorbent 14 is taken out from the adsorbent unit 20 and transferred to the test tube 31. As shown in FIG.

  As shown in FIG. 4A, the sampler 1 is placed indoors (in the atmosphere) by being hung with a string 100 on a ceiling or the like in a state where the plug member 15 is mounted, and for a predetermined time (for example, 24 hours) ) Leave. The substance to be collected which floats in the room passes through the first cylindrical member 11 and the second cylindrical member 12 and is adsorbed by the adsorbent 14. Therefore, the sampler 1 can collect the substance to be collected floating in the room (in the air). After a predetermined time has elapsed, the sampler 1 is collected.

As shown in FIG. 4B, the collected sampler 1 is disassembled, and the adsorbent unit 20 is taken out from the first cylindrical member 11.
As shown in FIG. 4C, the adsorbent unit 20 is disassembled, and the adsorbent 14 is taken out of the second cylindrical member 12. The removed adsorbent 14 is transferred to a test tube 31 for extracting the substance to be collected.

The substance to be collected adsorbed to the adsorbent 14 is evaluated in the following procedure.
(1) A carbon disulfide as an extraction solvent is added to a test tube 31 containing an adsorbent 14, and an ultrasonic wave is applied thereto for a predetermined time (for example, 20 minutes). Extract the collected material.
(2) The supernatant in the test tube 31 is filtered with glass wool and separated into vial tubes, which are analyzed by gas chromatography-mass spectrometry (GC-MS).
(3) The composition and amount of the substance to be collected are evaluated from the obtained chromatogram.
The measurement result by GC-MS is later mentioned using an Example.

  In the present embodiment, the sampler 1 is disposed inside the first cylindrical member 11 formed of the first material through which the substance to be collected can pass and the first cylindrical member 11, and the substance to be collected passes The second tubular member 12 formed of the second material which can be formed, the rod-like member 13 disposed inside the second tubular member 12, and the second tubular member 12 inside the second tubular member 12 And the rod-like member 13 and includes an adsorbent 14 capable of adsorbing a substance to be collected. Therefore, the amount of the adsorbent 14 filled in the second cylindrical member 12 is smaller by the volume integral of the rod-like member 13 as compared with the case where the rod-like member 13 is not present in the second cylindrical member 12 Become. Therefore, it is possible to suppress the amount of use of the adsorbent 14 filled in the second cylindrical member 12 and the amount of solvent necessary for extracting the substance to be collected. In addition, the operability of the sampler 1 is also excellent. In the sampler 1, the adsorbent 14 that contributes to the adsorption of the substance to be collected is only one that is filled at a position close to the inner surface of the second cylindrical member 12, and in the vicinity of the center of the second cylindrical member 12. The packed adsorbent 14 hardly contributes to the adsorption of the substance to be collected. Therefore, in the sampler 1, the rod-like member 13 hardly hinders the adsorption of the substance to be collected by the adsorbent 14.

  Further, in the present embodiment, the second cylindrical member 12, the rod-like member 13 and the adsorbent 14 are used as the adsorbent unit 20, and the adsorbent unit 20 is disposed inside the first cylindrical member 11. Therefore, it is easy to put the adsorbent 14 into and out of the first cylindrical member 11.

  The adsorbent 14 is filled around the rod-like member 13, and the rod-like member 13 does not contact the inner surface of the second cylindrical member 12 by the adsorbent 14 filled around the rod-like member 13. Therefore, the adsorbent 14 is present on all the inner surfaces of the second tubular member 12. As a result, the substance to be collected which has passed through the first tubular member 11 is adsorbed by the adsorbent 14 present on the inner surface of the second tubular member 12 without being blocked by the rod-like member 13. Therefore, the usage amount of the adsorbent 14 can be suppressed without preventing the collection of the substance to be collected in the sampler 1.

  Heretofore, an embodiment of the present invention has been described. However, the present invention is not limited to the above embodiment, and can be variously modified within the technical scope described in the claims.

  In the said embodiment, although porous PTFE is used as a 1st raw material which forms the 1st cylindrical member 11, it is not limited to this. The first material may be any material through which the substance to be collected can pass. The first tubular member 11 is obtained by sintering and molding an aggregate of resin particles such as polyethylene resin, polypropylene resin, polyester resin, or fluorine resin to such an extent that the resin particles can adhere to each other. It may be made of mesh glass fiber or stainless steel. The first tubular member 11 may not have a bottom in advance, and may have openings at both ends of the first tubular member 11. In that case, the openings at both ends can be changed to be sealed by the plug member 15.

  Although a nonwoven fabric is used as a 2nd raw material which forms the 2nd cylindrical member 12, it is not limited to this. The second material may be any material through which the substance to be collected can pass, and may be, for example, a porous sheet or a woven fabric. The second tubular member 12 may not have a bottom in advance, and the openings at both ends of the second tubular member 12 can be changed to be closed by a lid or the like. The second tubular member 12 may be a member having a natural shape in the form of a tube, or may be a member having a natural shape that is not tubular but may be in the form of a tube. For example, the second cylindrical member 12 may be in a state in which the rod-like member 13 and the adsorbing material 14 are not filled therein or in a cylindrical shape (a natural shape is a cylindrical shape), or The 2 cylindrical member 12 becomes cylindrical by filling the rod-like member 13 and the adsorbent 14 therein (even if the natural shape is not cylindrical but can be cylindrical) Good. In addition, the second cylindrical member 12 may be in the form of a sheet as an original shape, and may be formed into a cylindrical shape by winding the rod-like member 13 and the adsorbing material 14. That is, the 2nd cylindrical member 12 should just be a member which has become cylindrical in the state where sampler 1 was constituted.

Although the shape of the rod-like member 13 is a cylindrical shape, it is not limited to this. It may be a shape other than a cylinder, for example, an elliptic cylinder or a prism. The shape of the rod-like member 13 may be any shape that can suppress the amount of the adsorbent 14 filled inside the second cylindrical member 12.
Moreover, although the material of the rod-shaped member 13 was glass, it is not limited to this. The material of the rod-like member 13 may be a material that does not adhere to or chemically react with the adsorbent 14, for example, a material coated with a fluorine resin such as Teflon (registered trademark), stainless steel, or the like.

  Although the cross-sectional area of the rod-shaped member 13 was 56% of the inner cross-sectional area of the 2nd cylindrical member 12, it is not limited to this. The cross-sectional area of the rod-shaped member 13 should just be a cross-sectional area which can suppress the quantity of the adsorption material 14 with which the inside of the 2nd cylindrical member 12 is filled. Furthermore, the cross-sectional area of the rod-like member 13 is preferably 35% or more and 75% or less of the inner cross-sectional area of the second cylindrical member 12, and more preferably 36% or more and 71% or less. The reason why 35% or more and 75% or less are more preferable, and 36% or more and 71% or less is further preferable will be described later using an example. Moreover, although the length of the rod-shaped member 13 was substantially the same as the length of the 2nd cylindrical member 12, it is not limited to this. The length of the rod-like member 13 may be any length as long as the amount of the adsorbent 14 filled inside the second cylindrical member 12 can be suppressed, for example, 50% or more of the length of the second cylindrical member 12 Is preferred. In addition, the length of the rod-shaped member 13 means the length of the part by which the adsorption material 14 is filled with a periphery. Therefore, the upper limit of the length of the rod-like member 13 is 100% of the length of the second cylindrical member 12.

  Although the rod-shaped member 13 was not in contact with the inner surface of the second cylindrical member 12 by the adsorbent 14 filled around the rod-shaped member 13, the present invention is not limited to this. The rod-like member 13 may be in contact with the inner surface of the second cylindrical member 12. When the rod-like member 13 is in contact with the inner surface of the second tubular member 12, the collection capacity of the sampler 1 is slightly reduced, but the amount of use of the adsorbent 14 is suppressed.

  Various materials can be used as the adsorbent 14 depending on the composition of the substance to be collected. For example, inorganic adsorbents (activated carbon, zeolite, alumina, silica gel, etc.) and polymeric adsorbents (porous polystyrene, porous polyester, porous polyvinyl alcohol, etc.) are used according to the composition of the substance to be collected. Be done.

  The first cylindrical member 11, the second cylindrical member 12, the rod member 13 and the plug member 15 themselves do not substantially release volatile organic compounds, and therefore, they are trapped by the adsorbent 14. It does not substantially affect the composition or amount of the substance.

  Next, the effects of the embodiment will be described in more detail based on Examples and Comparative Examples. The present invention is not limited to the following examples.

[Test 1]
In the sampler 1, the influence of the change in the ratio of the cross-sectional area of the rod-like member 13 to the inner cross-sectional area of the second cylindrical member 12 (hereinafter also referred to as the cross-sectional area ratio) exerts on the collected material of the sampler 1 The test was done.

When conducting Test 1, the sampler of Comparative Example 1 shown in Table 1 and the samplers of Examples 1 to 5 were prepared.
The comparative example 1 is a sampler in which the rod-like member is not disposed inside the second cylindrical member. The first to fifth examples are samplers in which rod-like members are disposed inside the second cylindrical member. Examples 1 to 5 are samplers having different cross-sectional area ratios. Therefore, in the samplers of Comparative Example 1 and Examples 1 to 5, the amount of the loaded adsorbent is different. The amount of the adsorbent is the largest in Comparative Example 1 in which no rod-like member is disposed, and the smallest in Example 5 in which a rod-like member having the largest cross-sectional area ratio is disposed.

Evaluation was performed in the following procedure using the samplers of Comparative Example 1 and Examples 1 to 5.
(1) The sampler of Comparative Example 1 and the samplers of Examples 1 to 5 were placed in the same room, and exposed to room air for 24 hours.

(2) After 24 hours, the adsorbent was removed from the sampler of Comparative Example 1 and the samplers of Examples 1 to 5 and placed in a test tube. Carbon disulfide as an extraction solvent was added to the test tube, and ultrasonic waves were applied thereto for 20 minutes to extract the substance to be collected adsorbed on the adsorbent. Then, the supernatant in the test tube was filtered with glass wool to separate into vial tubes, which were analyzed by GC-MS.

(3) From the obtained chromatogram, it was examined how much the substance to be collected was contained in 1 μL of the solvent from which the substance to be collected was extracted. As the target substance to be evaluated, methyl isobutyl ketone, toluene, butyl acetate and styrene were selected.

The test results are shown in Table 2 and FIG. FIG. 5 is a graph showing the results of Test 1 of the example.
As described above, the amounts of adsorbents loaded in the sampler of Comparative Example 1 and the samplers of Examples 1 to 5 are different. Therefore, as shown in Table 2, the amount of solvent required to extract the substance to be collected differs between the sampler of Comparative Example 1 and the samplers of Examples 1 to 5. Since the sampler of Comparative Example 1 has the largest amount of adsorbent, it also has the largest amount of solvent required to extract the substance to be collected. Since the sampler of Example 5 has the smallest amount of adsorbent, it also requires the smallest amount of solvent to extract the substance to be collected.

  As can be seen from Table 2, in Examples 1 to 5, the amount of solvent required for extraction of the substance to be collected is smaller than the amount of solvent required for extraction of Comparative Example 1. In addition, as the cross-sectional area ratio increases, the amount of solvent required for extraction decreases.

  As can be seen from Table 2 and FIG. 5, the detected amount of the substance to be collected contained in 1 μL of the solvent in Examples 1 to 5 is larger than that in Comparative Example 1. From this, it is understood that Examples 1 to 5 can detect the substance to be collected with high sensitivity, using a smaller amount of the adsorbent and the solvent than Comparative Example 1. In Examples 1 to 5, as the cross-sectional area ratio increases, the detected amount of the substance to be collected contained in 1 μL of the solvent increases. From this, it is understood that in the sampler, it is better to use a rod-like member, and furthermore, it is better to have a larger cross-sectional area ratio of the rod-like member.

Further, as can be seen from Table 2, the extraction concentration ratio increases as the cross-sectional area ratio increases. The extraction concentration ratio shown in Table 2 is defined by the following equation.
Extraction concentration ratio = [(amount of solvent necessary for extraction in Comparative Example 1) / (amount of solvent necessary for extraction)] × 100
A large extraction concentration ratio means that a smaller amount of solvent is used at the time of analysis by GC-MS of a substance to be collected, and the substance to be collected is detected with high sensitivity.

[Test 2]
The method of suppressing the usage-amount of an adsorbent and a solvent can consider the method of adjusting the length of a sampler, and the internal diameter of a sampler other than the method of arrange | positioning a rod-shaped member.
In this test, the method of adjusting the length of the sampler and the inner diameter of the sampler with the same surface area of the sampler and the means of the present invention for increasing the cross-sectional area ratio were compared.

When conducting Test 2, the samplers of Comparative Examples 1 to 4 shown in Table 3 and the samplers of Examples 1 to 5 were prepared. The sampler of Comparative Example 1 is the sampler of Comparative Example 1 used in Test 1. The samplers of Examples 1 to 5 are the samplers of Examples 1 to 5 used in Test 1. The samplers of Comparative Examples 2 to 4 are newly prepared samplers when conducting Test 2.
The surface areas of the samplers of Comparative Examples 1 to 4 and Examples 1 to 5 are all the same. Comparative Examples 1 to 4 are samplers in which rod-like members are not arranged. In Comparative Examples 1 to 4, the length of the sampler and the inner diameter of the sampler are different from each other. The first to fifth examples are samplers in which rod-like members are disposed inside the second cylindrical member. Examples 1 to 5 are samplers having different cross-sectional area ratios.

  The test results using the samplers of Comparative Examples 1 to 4 and Examples 1 to 5 are shown in Table 3. In addition, the test results (adsorbent amount, extraction solvent amount and extraction concentration ratio) using the sampler of Comparative Example 1 and the test results using the sampler of Examples 1 to 5 (adsorbent material, extraction solvent amount and extraction concentration ratio) The test 1) is used as it is.

  As can be seen from Table 3, it is possible to increase the extraction concentration ratio even in Comparative Examples 2 and 3 in which no rod-like member is disposed and in Examples 1 to 5 in which a rod-like member is disposed. . For example, the sampler of Comparative Example 2 increases the extraction concentration ratio to 138%. However, in the sampler of Comparative Example 2, although the extraction concentration ratio is increased to 138%, the length of the sampler is as long as 110 mm, and the inner diameter of the sampler is as thin as 2.5 mm. Difficult to operate, and poor in operability. On the other hand, in the samplers of Examples 1 to 5, the adsorption and removal of the adsorbent are easy, and the operability is also good.

  Further, Comparative Examples 1 to 4 have a maximum extraction concentration ratio of 138% (Comparative Example 2), whereas Examples have a maximum extraction concentration ratio of 346% (Example 5). Moreover, Examples 3-5 have exceeded by extraction concentration ratio with respect to all Comparative Examples 1-4. From this, it is understood that the sampler in which rod-like members having a cross-sectional area ratio of 35% or more and 75% or less are disposed can achieve a large extraction concentration ratio that can not be achieved by the sampler in which the rod-like members are not disposed. More preferably, it is understood that the sampler in which rod-like members having a cross-sectional area ratio of 36% or more and 71% or less are disposed can achieve a large extraction concentration ratio that can not be achieved by the sampler in which the rod-like members are not disposed.

The results of Tests 1 and 2 are summarized as follows.
From the results of Test 1, it was found that by disposing the rod-like member inside the second cylindrical member in the sampler, the usage of the adsorbent and the solvent can be suppressed, and the substance to be collected can be detected with high sensitivity. In addition, it has been found that when the cross-sectional area ratio increases, the amount of use of the adsorbent and the solvent can be further suppressed, and the substance to be collected can be detected with higher sensitivity.

  From the results of Test 2, it was found that by disposing the rod-like member inside the second cylindrical member in the sampler, it is possible to realize a sampler that is easy to put in and out the adsorbent and has good operability. Moreover, by using a rod-shaped member having a cross-sectional area ratio of 35% or more and 75% or less inside the cylindrical member, the use of the adsorbent and the solvent can not be achieved by other means (Comparative Examples 1 to 4) It turned out that the amount can be suppressed. More preferably, by arranging the rod-like member having a cross-sectional area ratio of 36% or more and 71% or less, the amount of the adsorbent and the solvent used can be suppressed to such an extent that can not be achieved by other means (Comparative Examples 1 to 4). I understood.

DESCRIPTION OF SYMBOLS 1 Sampler 11 1st cylindrical member 12 2nd cylindrical member 13 Rod member 14 Adsorbent

Claims (6)

A first tubular member formed of a first material through which a substance to be collected can pass;
A second cylindrical member disposed inside the first cylindrical member and formed of a second material through which the substance to be collected can pass;
A rod-like member disposed inside the second tubular member;
An adsorbent which is filled between the second cylindrical member and the rod-like member inside the second cylindrical member, and which can adsorb the substance to be collected;
Equipped with
The first tubular member is a tubular member having a bottom at one end and an opening at the other end, and the opening at the other end is a tubular member sealed by a plug member, or The sampler, which is a cylindrical member having openings at both ends, and the openings at the both ends are sealed by plug members .   The sampler according to claim 1, wherein a cross-sectional area of the rod-like member is 35% or more and 75% or less of an inner cross-sectional area of the second cylindrical member.   The sampler according to any one of claims 1 and 2, wherein the length of the rod-like member is 50% or more of the length of the second tubular member.   The sampler according to any one of claims 1 to 3, wherein the second material is a breathable sheet.   The adsorbent is filled around the rod-like member, and the rod-like member does not contact the inner surface of the second tubular member by the adsorbent filled around the rod-like member. The sampler according to any one of 4. A method of using the sampler according to any one of claims 1 to 5, wherein
Placing the sampler in the atmosphere and adsorbing the substance to be collected to the adsorbent via the first tubular member and the second tubular member;
Removing from the first tubular member the adsorbent to which the second tubular member, the rod-like member, and the substance to be collected have been adsorbed;
Taking out the adsorbent from which the rod-like member and the substance to be collected are adsorbed from the second tubular member;
Extracting the substance to be collected by adding an extraction solvent to the adsorbent to which the substance to be collected is adsorbed;
How to use the sampler with

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