CN111380715A - Portable sampler for β -agonist detection - Google Patents

Abstract

The invention particularly discloses a portable sampler for β -agonist detection, which comprises a bearing piece and a through fitting piece, wherein the bearing piece is provided with a bearing cavity, a sealing boss is arranged in the bearing cavity, the through fitting piece is tubular, a through detection hole is formed in the through fitting piece, one end of the through fitting piece is connected with the bearing piece through a locking assembly, when the through fitting piece is connected with the bearing piece, a sealing ring is filled between a sealing surface of the through fitting piece and the sealing boss, and a detachable sealing piece is arranged at the other end of the through fitting piece.

Description

A portable sampler for beta-agonist detection

technical field

The invention relates to the technical field of food detection, in particular to a portable sampler for beta-agonist detection.

Background technique

Food safety is a hot research topic in the world today. Food directly affects the health and even life of animals. Before food is used, it needs to pass the experimental test of relevant departments to ensure the safety performance of food when eaten.

Food testing has now become a popular emerging industry. Food testing mainly detects whether the toxic and harmful substances in food cannot exceed relevant standards, and minimizes food safety risks, especially when athletes participate in sports. Beta-agonists in food It is particularly important to detect athletes to avoid fraud and fraud in sports events.

Beta-agonists are a drug used by people and veterinarians to treat asthma. Overdose use in livestock can convert adipose tissue into muscle tissue. β-agonists are often abused in livestock production due to their ability to significantly improve fat rate and production efficiency. In recent years, there have been case reports of salbutamol, tobuterol, brombuterol, clenbuterol, cibuterol, mabuterol, and terbutaline poisoning.

At present, the detection technology of β-agonist mainly includes chromatography technology and immunoassay technology. Chromatography is a classic technique, mainly including high performance liquid chromatography (HPLC), liquid chromatography-mass spectrometry (LC-MS), gas chromatography-mass spectrometry (GC-MS), high performance capillary electrophoresis (HPCE) and other methods. Chromatographic technology is sensitive and accurate, but the sample processing is cumbersome and time-consuming, the cost is high, the required equipment is expensive, the amount of samples tested at one time is small, and the detection time is long, and it requires specially trained professionals to operate complex equipment, which is not easy. universal.

SUMMARY OF THE INVENTION

In view of this, the object of the present invention is to provide a portable sampler for β-agonist detection.

In order to solve the above technical problems, the technical solution provided by the present invention is, a portable sampler for β-agonist detection, comprising,

a bearing member, the bearing member is provided with a bearing cavity, and the bearing cavity is provided with a sealing boss; and,

The through fitting is tubular, the inside of the through fitting is provided with a penetrating detection hole, and one end of the through fitting is connected with the carrier through a locking assembly;

Wherein, when the through fitting is connected to the bearing member, the sealing surface of the through fitting and the sealing boss are filled with a sealing ring;

Wherein, the other end of the through fitting is provided with a detachable seal.

Preferably, the locking assembly includes an elastic locking member located on the through fitting and a locking groove located on the inner wall of the bearing cavity;

Wherein, the elastic locking member can be embedded in the locking groove.

Preferably, the elastic locking piece includes a locking block and an elastic piece, a plurality of sliding cavities are arranged on the side wall of the through fitting, and the locking pieces are respectively arranged in the sliding cavity through the elastic piece, The bearing member can push the locking block to compress the elastic member in the sliding cavity to move;

Wherein, each of the locking blocks is provided with an inclined surface-, and the opening of the bearing cavity is respectively provided with a coupling surface matched with the inclined surface-.

Preferably, the elastic locking member includes a stop block and an elastic arm, a swing cavity for the elastic locking member to swing is provided on the side wall of the through-piece, and the stop block protrudes outside the swing cavity ;

Wherein, the carrier can push the stop block to compress the elastic arm to swing into the swing cavity.

Preferably, the through fitting and the bearing cavity are threadedly connected;

Wherein, the locking groove is annular, and the opening of the bearing cavity is trumpet-shaped.

Preferably, the end of the through fitting is further provided with an extension ring, the outer diameter of the extension ring is smaller than the outer diameter of the through fitting, and the transition between the extension ring and the through fitting forms the sealing surface;

When the through fitting is connected to the carrier, the space between the outer side of the extension ring and the inner side of the sealing boss is filled with a sealing gasket.

Preferably, the through fitting further comprises a filter element, the filter element is in an inverted cone shape, the surface of the filter element is distributed in the filter holes, and the large diameter end of the filter element is fixedly connected with the extension ring;

The bearing cavity is provided with a grinding cavity matched with the filter element, and grinding protrusions are distributed on the inner wall of the grinding cavity.

Preferably, an accommodating cavity is further provided in the through fitting, the accommodating cavity forms an opening on one side of the through fitting, the sealing member extends into the accommodating cavity through the opening, and the the seal completely covers the detection hole;

A rubber ring is used for sealing between the sealing element and the accommodating cavity.

Preferably, the sealing member includes a handle and a plate body, the handle is located outside the through fitting, and a sealing gasket for sealing the opening is provided between the handle and the plate body; the outline of the plate body extends;

Wherein, when the bearing member is in contact with the handle, the elastic locking member is embedded in the locking groove.

Preferably, the plate body includes a first plate body, a second plate body and a connecting belt connecting the first plate body and the second plate body, the first plate body is fixedly connected with the handle, and the connection The straps are made of soft material.

Preferably, a guide hole communicated with the accommodating cavity is further provided on the side of the through fitting away from the opening; the second plate body is further provided with a guide rod that can extend into the guide hole , the guide rod penetrates the rubber ring.

Preferably, it also includes a detection component, the detection component includes a connector and a detection test paper, the connector is tubular, and the detection test paper is arranged in the connector;

A connecting part is further provided on the end of the through fitting away from the extension ring, and the connecting part is connected with the connecting part by screwing.

Beneficial effects of the present invention:

In the specific application of the present invention, the food to be detected is placed in the bearing cavity, and then the through fitting is connected to the bearing member through the locking assembly. The detection solution is used for agonist detection; at the same time, after the connection between the pass-through fitting and the carrier is established, the entire sampler can be moved to a suitable detection place for detection due to the sealed interior, which improves the portability of the sampler; at the same time, The locking assembly has an anti-disassembly function to protect the sample.

Description of drawings

The accompanying drawings are used to provide a preferred understanding of the present invention and constitute a part of the specification, and together with the embodiments of the present invention, they are used to explain the present invention, and are not construed to limit the present invention. In the attached image:

1 is a schematic structural diagram of a portable sampler for β-agonist detection according to the present invention;

Fig. 2 is the exploded view of Fig. 1;

3 is a schematic cross-sectional view of the internal structure of FIG. 1;

Fig. 4 is the structural representation of the carrier in Fig. 3;

Fig. 5 is the structural representation of the pass fitting in Fig. 3;

FIG. 6 is an enlarged schematic view of the locking assembly in FIG. 3;

FIG. 7 is a schematic view of the locking block compressing the elastic member moving in the sliding cavity in FIG. 6;

8 is a schematic structural diagram of another portable sampler mid-pass accessory for β-agonist detection;

FIG. 9 is an enlarged schematic view of the locking assembly in another portable sampler for β-agonist detection;

FIG. 10 is a schematic view of the stop block compressing the elastic arm moving into the swing cavity in FIG. 9;

11 is a schematic structural diagram of a carrier in another portable sampler for β-agonist detection;

Figure 12 is a schematic overall cross-sectional view of another portable sampler for β-agonist detection;

Fig. 13 is the three-dimensional schematic diagram of Fig. 8;

14 is a schematic diagram of the overall structure of another portable sampler for β-agonist detection;

Figure 15 is the exploded view of Figure 14;

Figure 16 is a schematic structural diagram of a seal;

Figure 17 is a schematic cross-sectional view of the sealing element in the accommodating cavity;

Fig. 18 is the exploded schematic diagram of Fig. 17;

19 is a schematic diagram of the overall structure of a portable sampler for food agonist detection equipped with a detection component;

FIG. 20 is a schematic diagram of the structure of the detection assembly.

Detailed ways

In order to make those skilled in the art better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

Example 1

Referring to FIGS. 1 to 2 , it is the first embodiment of the present invention, which provides a portable sampler for beta-agonist detection, which includes a carrier 100 and a pass-through fitting 200;

The carrier 100 is provided with a bearing cavity N1, the bearing cavity N1 is used for holding the food to be tested, and a sealing boss 110 is arranged in the bearing cavity N1, and the sealing boss 110 is a protrusion along the circumferential direction in the bearing cavity N1, and the sealing convex The upper surface of the stage 110 is not higher than the opening of the bearing cavity N1;

The through fitting 200 is in a tubular shape, the inside of the through fitting 200 is provided with a penetrating detection hole N2, the end of the through fitting 200 can extend into the bearing cavity N1, and one end of the through fitting 200 can establish a connection with the bearing member 100 through the locking assembly 300 ; Wherein, when the through fitting 200 is connected with the bearing member 100, the detection hole N2 is communicated with the bearing cavity N1, the sealing surface 210 of the through fitting 200 and the sealing boss 110 are filled by the sealing ring 120, and the sealing ring 120 is arranged on the sealing boss 110; wherein, the other end of the through fitting 200 is provided with a detachable sealing member 400; that is, the communication cavity formed by the bearing cavity N1 and the detection hole N2, one end is sealed by the sealing member 400, and the other end is sealed by the sealing ring 120, forming a complete sealed space.

In this embodiment, the sealing member 400 is an aluminum foil piece glued on the end face of the through fitting 200, and the aluminum foil piece can be peeled off to expose the detection hole N2, and at the same time, after the aluminum foil piece is peeled off, it cannot be glued and reset. , plays the role of protecting the sample, that is, it cannot be reused after being opened, and it can also prevent malicious contamination of the food to be tested in the bearing cavity N1, resulting in abnormal final test results.

In a specific application, the food to be tested, such as fresh pork, is placed in the bearing cavity N1, pure water is added into the bearing cavity N1, and then one end of the through fitting 200 is inserted into the bearing cavity N1, and the locking assembly 300 passes through the loading cavity N1. A connection is established with the carrier 100, and after being placed for a period of time, the seal 400 can be uncovered, and the liquid to be detected in the carrier chamber N1 can be tested for agonist through the test paper; The interior is sealed, and the entire sampler can be moved to a suitable testing location for testing.

Further, the locking assembly 300 includes an elastic locking member 310 located on the through fitting 200 and a locking groove 320 located on the inner wall of the bearing cavity N1; wherein, the elastic locking member 310 can be embedded in the locking groove 320, After the elastic locking member 310 on the fitting 200 is inserted into the locking groove 320 on the inner wall of the bearing cavity N1 , the connection between the through fitting 200 and the bearing member 100 can be established.

It should be noted that the locking assembly 300 in this embodiment has an anti-disassembly function, that is, after the connection between the through fitting 200 and the bearing member 100 is established, the through fitting 200 and the bearing member 100 cannot be separated again, thus protecting the sample.

Example 2

Referring to FIGS. 2 to 4 , this embodiment differs from the first embodiment in that an extension ring 230 is further provided at the end of the through fitting 200 , the outer diameter of the extension ring 230 is smaller than that of the through fitting 200 , and the detection hole N2 penetrates through The extension ring 230 forms a sealing surface 210 at the transition between the extension ring 230 and the through fitting 200 ; when the through fitting 200 is connected to the carrier 100 , the space between the outer side of the extension ring 230 and the inner side of the sealing boss 110 is filled with a gasket 240 to seal The pad 240 is disposed on the outer wall of the extension ring 230 .

After the through fitting 200 in this embodiment is connected to the bearing member 100 , the bearing cavity N1 is double-sealed by the sealing gasket 240 and the sealing ring 120 , which greatly improves the sealing effect.

Example 3

Referring to FIGS. 2 to 7 , the present embodiment is different from the above-mentioned embodiments in that the elastic locking member 310 of this embodiment includes a locking block 311a and an elastic member 312a, and a plurality of sliding cavities 220a are provided on the side wall of the through fitting 200 , the sliding chambers 220a are evenly distributed along the circumferential direction of the through fitting 200, and the locking blocks 311a are respectively arranged in the sliding chamber 220a through the elastic pieces 312a. On the outer surface, the carrier 100 can push the locking block 311a to compress the elastic member 312a in the sliding cavity 220a to move, and the locking block 311a can be completely hidden in the sliding cavity 220a;

Wherein, the locking blocks 311a are provided with inclined surfaces 311a-1, the inclined surfaces 311a-1 face downward, and the openings of the bearing cavity N1 are respectively provided with coupling surfaces 130 matched with the inclined surfaces 311a-1, and one end of the through fitting 200 is extended into the In the bearing cavity N1, after the coupling surface 130 is in contact with the inclined surface 311a-1, under the action of the inclined surface, the locking block 311a can be pushed to compress the elastic member 312a to move in the sliding cavity 220a until the locking block 311a is completely hidden in the sliding cavity 220a Inside, when the locking groove 320 reaches the locking block 311a, the elastic member 312a pushes the locking block 311a to reset until the locking block 311a extends into the locking groove 320, and the through fitting 200 and the bearing member 100 can be connected and connected. Afterwards, there is no inclined surface on the top of the locking block 311a, so that the anti-removal function can be achieved, and the sample can be protected.

Example 4

Referring to FIGS. 8 to 10 , the present embodiment is different from the above-mentioned embodiments in that the elastic locking member 310 of this embodiment includes a stopper block 311b and an elastic arm 312b, and the side wall of the through fitting 200 is provided with elastic locking The stopper 311b protrudes from the outside of the swinging cavity 220b, the elastic arm 312b is inclined as a whole, the top of the elastic arm 312b is inclined toward the outside of the swinging cavity 220b, and the stopper 311b is located on the top of the elastic arm 312b , Under the action of external force, the stop block 311b can be pushed to compress the elastic arm 312b to move into the swing cavity 220b until the stop block 311b completely enters the swing cavity 220b, wherein the upper and lower edges of the stop block 311b are arc-shaped transitions;

Extend one end of the through fitting 200 into the bearing cavity N1, when the stopper 311b contacts the top of the bearing member 100 and continues to move downward, the bearing member 100 can push the stopper 311b to compress the elastic arm 312b and swing into the swinging cavity 220b , until the stop block 311b completely enters the swing cavity 220b, and continues to move downward,

The carrier 100 can push the stopper 311b to compress the elastic arm 312b to swing into the swinging cavity 220b. When the locking groove 320 reaches the stopper 311b, the elastic arm 312b pushes the stopper 311b to reset until the stopper 311b extends The fitting 200 and the carrier 100 can be connected by inserting into the locking groove 320, and after the connection, when you want to disassemble it downward, the top of the elastic arm 312b is inclined toward the outside of the swing cavity 220b, and the stopper 311b cannot be pushed to swing. By moving in the cavity 220b, the anti-disassembly function can be achieved, and the sample can be protected.

Example 5

Referring to FIGS. 11 to 12 , the present embodiment differs from the above-mentioned embodiments in that the through fitting 200 is connected with the bearing cavity N1 in a threaded connection; wherein, the locking groove 320 is annular, and the opening of the bearing cavity N1 is trumpet-shaped, that is, the coupling The surface 130 extends along the circumferential direction to form a trumpet shape; wherein, the carrier 100 is further provided with a rotating handle 150 which is convenient for rotating operation.

In this embodiment, the elastic locking member 310 is preferably the structure in Embodiment 4. At this time, after extending one end of the through fitting 200 into the bearing cavity N1, the bearing member 100 is rotated to move the through fitting 200 into the bearing cavity N1, After the horn-shaped locking groove 320 contacts the stopper 311b, the stopper 311b can be simultaneously pushed to compress the elastic arm 312b to move into the swinging cavity 220b as the carrier 100 continues to rotate until the stopper 311b snaps into place. In the locking groove 320, the installation is completed.

Example 6

Referring to FIGS. 12 to 13 , the present embodiment differs from the above-mentioned embodiments in that the pass-through fitting 200 further includes a filter element 250 . The filter element 250 is in the shape of an inverted cone. The large diameter end is fixedly connected with the extension ring 230 ; the bearing cavity N1 is provided with a grinding cavity N3 matched with the filter element 250 , the inner wall of the grinding cavity N3 is distributed with grinding protrusions 140 , between the grinding protrusion 140 and the surface of the filter element 250 Leave a grinding gap, place the food to be tested in the grinding chamber N3, add pure water, extend the filter element 250 of the pass fitting 200 into the grinding cavity N3, rotate the bearing member 100, and make the pass fitting 200 move into the bearing cavity N1 Moving, the distance between the grinding protrusion 140 and the surface of the filter member 250 is gradually approached. During the rotation process of the carrier 100, the grinding protrusion 140 gradually grinds the food to be tested, which can fully release the agonist inside the food to be tested, and can ensure detection. accuracy.

Example 7

Referring to FIGS. 14 to 18 , the present embodiment differs from the above-mentioned embodiments in that both the top and bottom of the through fitting 200 are open, and the middle of the through fitting 200 is further provided with an accommodating cavity N4 . An opening is formed on one side, the sealing member 400 extends into the accommodating cavity N4 through the opening, and the sealing member 400 completely covers the detection hole N2; the sealing member 400 and the accommodating cavity N4 are sealed by the rubber ring 410, when the bottom of the through fitting 200 extends After entering the bearing cavity N1 and establishing the connection with the bearing member 100, although the bearing cavity N1 is communicated with the detection hole N2, the sealing in the bearing cavity N1 can be realized under the action of the sealing member 400 and the rubber ring 410. The component 400 is taken out from the accommodating cavity N4, and the test paper can be extended from the top of the pass-through component 200 into the bearing cavity N1 to complete the detection.

Specifically, the sealing member 400 includes a handle 420 and a plate body 430 , the handle 420 is located outside the through fitting 200 , a sealing gasket 440 for closing the opening is provided between the handle 420 and the plate body 430 , and the plate body 430 extends into the accommodating cavity N4 can completely cover the detection hole N2, and the opening of the accommodating cavity N4 is blocked by the sealing gasket 440 to realize the sealing of the opening; the rubber ring 410 extends along the outline of the plate body 430, and the rubber ring 410 blocks the inner plate of the detection hole N2 the space on both sides of the body 430;

The plate body 430 includes a first plate body 431, a second plate body 432, and a connecting band 433 connecting the first plate body 431 and the second plate body 432. The first plate body 431 is fixedly connected to the handle 420, and the connecting band 433 is composed of It is made of soft material, that is, the connecting belt 433 can provide a pulling force, but cannot provide a pushing force. After the plate body 430 is taken out from the accommodating cavity N4 as a whole, the plate body 430 cannot be installed into the accommodating cavity N4 again. The body 432 extends into the accommodating cavity N4 from the opening. Since the connecting strap 433 cannot provide thrust, even if the first plate body 431 is forcibly extended into the accommodating cavity N4 through the handle 420, the second plate body 432 cannot be pushed to the initial position. Therefore, this solution can play the role of anti-counterfeiting, that is, the plate body 430 cannot be installed again after being taken out, so as to protect the sample and prevent the sample from being polluted and affect the detection effect.

Further, a guide hole N5 that communicates with the accommodating cavity N4 is further provided on the side of the through fitting 200 away from the opening; the second plate body 432 is also provided with a guide rod 450 that can extend into the guide hole N5. The guide rod 450 Through the rubber ring 410 , the length of the guide rod 450 is greater than the diameter of the through fitting 200 during manufacture. The guide rod 450 is extended from the opening of the accommodating cavity N4 until it protrudes from the guide hole N5, and the guide rod 450 is pulled from the guide hole N5. , until the second plate body 432 and the first plate body 431 are pulled into the accommodating cavity N4 in turn, until the sealing is completed and the installation is completed, and then the guide rod 450 is broken at the surface of the through fitting 200 to achieve the above anti-counterfeiting purpose.

Further, in order to make full use of the function of the sealing member 400, since the sealing member 400 is pre-installed on the through fitting 200, when the bearing member 100 and the through fitting 200 are connected, the bearing member 100 is rotated until the bearing member 100 is in contact with the handle 420. When in contact, the elastic locking member 310 is just inserted into the locking groove 320, which is more convenient for installation.

Example 8

Referring to FIGS. 14 to 18 , this embodiment is different from the above-mentioned embodiments in that this embodiment is also equipped with a detection assembly 500 . The detection assembly 500 includes a connector 510 and a detection test paper 520 , the connector 510 is tubular, and the detection test paper 520 is provided with in the connecting piece 510; the end of the through fitting 200 away from the extension ring 230 is further provided with a connecting part 260, and the connecting piece 510 and the connecting part 260 are connected by threads;

On the basis of Embodiment 7, the detection assembly 500 can be installed on the pass fitting 200 in advance, and the connector 510 can be rotated to install until the connector 510 contacts the handle 420 of the seal 400. At this time, the detection test paper in the connector 510 520 is located in the detection hole N2, but is sealed and isolated by the sealing member 400, and the detection test paper 520 will not enter under the detection hole N2;

After sampling, install the pass fitting 200 on the carrier 100, take out the seal 400, and rotate the connector 510 until the connector 510 contacts the carrier 100. At this time, the test paper 520 in the connector 510 enters the carrier cavity N1, Contact with the liquid to be detected, after contacting for a period of time, reversely rotate the connector 510 to make the detection test paper 520 leave the liquid to be detected, after standing for a period of time, observe the situation of the detection test paper 520 from the observation port 512, and judge that the agonist test is positive or negative.

The connecting piece 510 is provided with a rotating part 513 which is convenient for rotating operation, and the connecting piece 510 is provided with an installation groove 511 for installing the detection test paper 520. The detection test paper 520 is equipped with an installation block 521, and the detection test paper 520 can be installed through the installation block 521. It is installed in the installation slot 511, and the detection test paper 520 can also be taken out through the installation block 520;

In order to be able to detect multiple agonists at one time, especially the β-agonists commonly found in food, such as clenbuterol, salbutamol, ractopamine, terbutaline, mabuterol, tobuterol, etc., A plurality of installation grooves 511 are evenly distributed along the circumferential direction of the connector 510 , which can install a plurality of different types of test strips 520 at the same time. The connector 510 is also provided with a plurality of observation ports 512 correspondingly to realize simultaneous detection.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still understand the foregoing embodiments. The technical solutions described are modified, or some technical features thereof are equivalently replaced. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. A portable sampler for beta-agonist detection, characterized in that, comprising, a bearing member, the bearing member is provided with a bearing cavity, and the bearing cavity is provided with a sealing boss; and, The through fitting is tubular, the inside of the through fitting is provided with a penetrating detection hole, and one end of the through fitting is connected with the carrier through a locking assembly; Wherein, when the through fitting is connected to the bearing member, the sealing surface of the through fitting and the sealing boss are filled with a sealing ring; Wherein, the other end of the through fitting is provided with a detachable seal. 2 . The portable sampler for β-agonist detection according to claim 1 , wherein the locking assembly comprises an elastic locking member located on the through-piece and located in the carrying cavity. 3 . locking grooves on the inner wall; Wherein, the elastic locking member can be embedded in the locking groove. 3. The portable sampler for β-agonist detection according to claim 2, wherein the elastic locking member comprises a stopper block and an elastic arm, and a side wall of the through member is provided with a There is a swing cavity for the elastic locking member to swing, and the stop block protrudes outside the swing cavity; Wherein, the carrier can push the stop block to compress the elastic arm to swing into the swing cavity. 4. The portable sampler for β-agonist detection according to any one of claims 1 to 3, wherein an extension ring is further provided at the end of the through fitting, and the extension ring The outer diameter of the ring is smaller than the outer diameter of the through fitting, and the transition between the extension ring and the through fitting forms the sealing surface; When the through fitting is connected to the carrier, the space between the outer side of the extension ring and the inner side of the sealing boss is filled with a sealing gasket. 5. The portable sampler for β-agonist detection according to claim 4, characterized in that, the through fitting and the bearing cavity are threadedly connected; Wherein, the locking groove is annular, and the opening of the bearing cavity is trumpet-shaped. 6 . The portable sampler for β-agonist detection according to claim 5 , wherein the pass-through part further comprises a filter part, the filter part is in the shape of an inverted cone, and the filter part has an inverse cone shape. 7 . The surface is distributed in the filter holes, and the large diameter end of the filter element is fixedly connected with the extension ring; The bearing cavity is provided with a grinding cavity matched with the filter element, and grinding protrusions are distributed on the inner wall of the grinding cavity. 7. A portable sampler for β-agonist detection according to claim 1 or 6, characterized in that, a accommodating cavity is further provided in the pass-through fitting, and the accommodating cavity is in the pass-through part. An opening is formed on one side of the fitting, and a seal extends into the accommodating cavity through the opening, and the seal completely covers the detection hole; A rubber ring is used for sealing between the sealing element and the accommodating cavity. 8 . The portable sampler for beta-agonist detection according to claim 7 , wherein the seal comprises a handle and a plate body, the handle is located outside the through-piece, and the handle A blocking pad for blocking the opening is arranged between the board and the board; the rubber ring extends along the outline of the board; Wherein, when the bearing member is in contact with the handle, the elastic locking member is embedded in the locking groove. 9 . The portable sampler for β-agonist detection according to claim 8 , wherein the plate body comprises a first plate body, a second plate body, and a connection between the first plate body and the The connecting belt of the second plate body, the first plate body is fixedly connected with the handle, and the connecting belt is made of soft material. 10. A portable sampler for β-agonist detection according to claim 9, characterized in that, a side of the through-piece away from the opening is further provided with a A guide hole; the second plate body is also provided with a guide rod that can extend into the guide hole, and the guide rod penetrates the rubber ring.

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