A solid phase microextraction assisted device

Abstract

The utility model relates to analytical chemistry sample pretreatment technical field, and disclose a kind of solid phase microextraction auxiliary device, including extraction box;And the auxiliary assembly of being set in the inside of extraction box, auxiliary assembly includes fixedly connected in the fixed column of the bottom of the inner wall of extraction box, the outer wall sliding connection of fixed column has limit block, the bottom fixed connection of limit block has spring, by setting auxiliary assembly, when two pieces of sleeve block are relatively close, will pass through two pieces of batten relatively close, make the rubber block of two pieces of batten side wall can be extruded fixed to the both sides of extraction tube, to improve the stability in the extraction process to solution, when in the extraction process to solution, extraction tube produces the process of shaking, will drive bearing plate to move down, make bearing plate drive limit block to move down, make limit block move down along the outer wall of fixed column, and compression spring, to achieve the purpose of buffering to bearing plate and extraction tube.

Description

Technical Field

[0001] This utility model relates to the field of analytical chemistry sample pretreatment technology, specifically to a solid-phase microextraction auxiliary device. Background Technology

[0002] Solid-phase microextraction (SPME) overcomes the shortcomings of traditional sample pretreatment techniques, integrating sampling, extraction, concentration, and injection into a single process, significantly accelerating analytical detection. Its remarkable technical advantages are attracting widespread attention and being vigorously promoted by analysts in the environmental, food, and pharmaceutical industries. SPME technology is based on using fused silica fibers coated with a stationary phase to adsorb and enrich analytes in samples. Its most significant feature is the ability to concentrate analytes simultaneously with extraction. Using fused silica optical fibers or other materials as the matrix support, and leveraging the principle of "like dissolves like," thin layers of polymeric stationary phases with different properties are coated onto their surfaces. Analytes are extracted, enriched, injected, and desorbed directly or via headspace methods. The fiber enriched with the analytes is then directly transferred to the instrument (GC or HPLC) for desorption via a specific method (generally thermal desorption or solvent desorption), followed by separation and analysis.

[0003] According to a solid-phase microextraction auxiliary device proposed in Chinese patent CN116943285A, a device capable of clamping the extraction tube is constructed by setting up a sliding rod, mounting cylinder, threaded sleeve, threaded rod, and clamping plate. Then, the extraction head can be clamped by setting up a second electric push rod and a fixing plate. The inner cavity of the fixing plate is equipped with a pressure sensor, which allows the user to monitor the pressure of clamping the extraction head at any time to avoid breakage due to excessive pressure. Finally, the first electric push rod pushes the extraction head downward to insert it into the extraction tube for extraction experiments. The combination of the above structures can free up the hands, reduce the amount of labor, and maintain the stability of the extraction head.

[0004] However, this patent still has some shortcomings. Although the device can clamp and fix the extraction tube, it cannot adjust the clamping distance according to different models of extraction tubes. If the diameter of the extraction tube is small and the clamping distance is too large, it cannot be clamped effectively, which can easily cause the extraction tube to shake or even fall off during operation, affecting the extraction stability. Conversely, if the diameter of the extraction tube is large and the clamping distance is insufficient, it is difficult to accommodate it. Forced clamping can easily lead to uneven pressure on the tube or even damage, which not only affects the accuracy of the experimental results, but may also increase the cost of experimental consumables. Therefore, we propose a solid-phase microextraction auxiliary device. Utility Model Content

[0005] The purpose of this invention is to provide a solid-phase microextraction auxiliary device that solves the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a solid-phase microextraction auxiliary device, comprising an extraction chamber;

[0007] And an auxiliary component disposed inside the extraction chamber, the auxiliary component including a fixed column fixedly connected to the bottom of the inner wall of the extraction chamber, a limit block slidably connected to the outer wall of the fixed column, a spring fixedly connected to the bottom of the limit block, a support plate fixedly connected to the other end of the limit block, an extraction tube slidably connected to the top center of the support plate, a connecting plate fixedly connected to the top of the support plate, a rectangular frame fixedly connected to the top of the connecting plate, a fixed seat fixedly connected to the outer wall of the rectangular frame, a drive motor fixedly connected to the top inner wall of the fixed seat, a bidirectional threaded rod fixedly connected to the output end of the drive motor, two sleeve blocks symmetrically threaded to the outer wall of the bidirectional threaded rod, and the side walls of the sleeve blocks... A clamping plate is fixedly connected, with its outer wall slidably connected to the inner wall of a rectangular frame. A rubber block is fixedly connected to the side wall of the clamping plate, and the side wall of the rubber block is slidably connected to the outer wall of the extraction tube. By setting an auxiliary component, when the two connecting blocks are relatively close, the two clamping plates will also be relatively close, allowing the rubber blocks on the side walls of the two clamping plates to squeeze and fix both sides of the extraction tube, thereby improving the stability during the extraction process. When the extraction tube shakes during the extraction process, it will drive the support plate to move downward, causing the support plate to drive the limiting block to move downward, and causing the limiting block to move downward along the outer wall of the fixed column, compressing the spring, thereby achieving the purpose of buffering the support plate and the extraction tube.

[0008] Preferably, the extraction chamber is further equipped with an extraction assembly. The extraction assembly includes an electric push rod fixedly connected to the top of the inner wall of the extraction chamber. The output end of the electric push rod is fixedly connected to a positioning frame. A T-shaped block is slidably connected to the inner wall of the positioning frame. A screw is threadedly connected to the right inner wall of the positioning frame. The outer wall of the other end of the screw is threadedly connected to the right inner wall of the T-shaped block. An extraction head is fixedly connected to the bottom center of the T-shaped block. By setting up the extraction assembly, when it is necessary to extract the solution inside the extraction tube, the operator activates the electric push rod, causing it to extend and push the extraction head into the interior of the extraction tube, thereby extracting the solution inside the extraction tube. After the solution extraction is completed, when it is necessary to disassemble and maintain the extraction head, the operator loosens the screw, causing it to disengage from the right side of the T-shaped block. The operator then pulls out the T-shaped block, causing it to pull out the extraction head along with the T-shaped block, thus facilitating maintenance of the extraction head.

[0009] Preferably, the bottom of the extraction box is fixedly connected with four support legs. The four support legs are equidistantly fixedly connected to the bottom of the four corners of the extraction box. The four support legs at the bottom of the extraction box can provide stable support for the extraction box.

[0010] Preferably, the front of the extraction chamber is hinged to a door, the inner wall of the door is fixedly connected to an observation window, and the front of the door is fixedly connected to a handle. The door and handle on the front of the extraction chamber allow the operator to easily flip the door by pulling the handle, thus facilitating the removal and placement of the extraction tube inside the extraction chamber. During the extraction process, the operator can observe the extraction process through the observation window inside the door.

[0011] Preferably, there are four fixing posts, which are located at the four outer corners of the support plate.

[0012] Preferably, there are two rubber blocks, located on opposite sides of the extraction tube.

[0013] This invention provides an auxiliary device for solid-phase microextraction. This auxiliary device for solid-phase microextraction has the following advantages:

[0014] (1) This solid-phase microextraction auxiliary device, by setting auxiliary components, in order to improve the stability of the extraction process of the solution inside the extraction tube, firstly, the extraction tube needs to be clamped and fixed. At this time, the operator places the extraction tube on the top of the support plate, and then turns on the drive motor to make the bidirectional threaded rod rotate. During the rotation of the bidirectional threaded rod, after the two clamps are limited by the inside of the rectangular frame, the two sleeve blocks will be made to move closer to each other along the outer wall of the bidirectional threaded rod. When the two sleeve blocks are closer to each other, the two clamps will move closer to each other, so that the rubber blocks on the side walls of the two clamps can squeeze and fix the two sides of the extraction tube, thereby improving the stability of the solution extraction process. When the extraction tube shakes during the solution extraction process, it will drive the support plate to move downward, and the support plate will drive the limiting block to move downward, and the limiting block will move downward along the outer wall of the fixed column and compress the spring, thereby achieving the purpose of buffering the support plate and the extraction tube.

[0015] (2) This solid-phase microextraction auxiliary device, by setting up an extraction component, when it is necessary to extract the solution inside the extraction tube, the operator turns on the electric push rod to extend the electric push rod and push the extraction head into the inside of the extraction tube, thereby realizing the extraction of the solution inside the extraction tube. When the solution extraction is completed, and it is necessary to disassemble and maintain the extraction head, the operator loosens the screw so that the screw is released from the limit on the right side of the T-block. The operator then pulls out the T-block, which pulls the extraction head out together, thus facilitating the operator to maintain the extraction head. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a partial cross-sectional view of the present invention;

[0018] Figure 3 This is a schematic diagram of the auxiliary components in this utility model;

[0019] Figure 4 This is a partial cross-sectional view of the extraction component in this utility model.

[0020] In the diagram: 1. Extraction chamber; 2. Support leg; 3. Chamber door; 41. Auxiliary component; 411. Fixing column; 412. Limiting block; 413. Spring; 414. Bearing plate; 415. Extraction tube; 416. Connecting plate; 417. Rectangular frame; 418. Fixing seat; 419. Drive motor; 4110. Bidirectional threaded rod; 4111. Sleeve block; 4112. Clamping plate; 4113. Rubber block; 42. Extraction component; 421. Electric push rod; 422. Positioning frame; 423. T-block; 424. Screw; 425. Extraction head; 5. Observation window; 6. Handle. Detailed Implementation

[0021] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described with reference to the accompanying drawings.

[0022] like Figure 1-4 As shown, this utility model has the following two specific embodiments.

[0023] Example 1

[0024] A solid-phase microextraction auxiliary device includes an extraction chamber 1;

[0025] And an auxiliary component 41 disposed inside the extraction chamber 1. The auxiliary component 41 includes a fixing post 411 fixedly connected to the bottom of the inner wall of the extraction chamber 1. A limit block 412 is slidably connected to the outer wall of the fixing post 411. A spring 413 is fixedly connected to the bottom of the limit block 412. A support plate 414 is fixedly connected to the other end of the limit block 412. An extraction tube 415 is slidably connected to the top center of the support plate 414. A connecting plate 416 is fixedly connected to the top of the support plate 414. A rectangular frame 417 is fixedly connected to the top of the connecting plate 416. A fixing seat is fixedly connected to the outer wall of the rectangular frame 417. 418, a drive motor 419 is fixedly connected to the top inner wall of the fixed base 418. A bidirectional threaded rod 4110 is fixedly connected to the output end of the drive motor 419. Two sleeve blocks 4111 are symmetrically threaded to the outer wall of the bidirectional threaded rod 4110. A clamping plate 4112 is fixedly connected to the side wall of the sleeve block 4111. The outer wall of the clamping plate 4112 is slidably connected to the inner wall of the rectangular frame 417. A rubber block 4113 is fixedly connected to the side wall of the clamping plate 4112. The side wall of the rubber block 4113 is slidably connected to the outer wall of the extraction tube 415. By setting the auxiliary component 41, during the extraction process... During the extraction process, to improve the stability of the solution inside the extraction tube 415, the extraction tube 415 first needs to be clamped and fixed. At this time, the operator places the extraction tube 415 on top of the support plate 414, and then turns on the drive motor 419 to rotate the bidirectional threaded rod 4110. During the rotation of the bidirectional threaded rod 4110, the two clamping plates 4112 are limited by the rectangular frame 417, causing the two socket blocks 4111 to move closer together along the outer wall of the bidirectional threaded rod 4110. When the two socket blocks 4111 are close together, By bringing the two clamping plates 4112 closer together, the rubber blocks 4113 on the sidewalls of the clamping plates 4112 can press and fix the two sides of the extraction tube 415, thereby improving the stability during the extraction process of the solution. When the extraction tube 415 shakes during the extraction process, it will drive the support plate 414 to move downward, causing the support plate 414 to drive the limiting block 412 to move downward, causing the limiting block 412 to move downward along the outer wall of the fixing column 411 and compress the spring 413, thereby achieving the purpose of buffering the support plate 414 and the extraction tube 415.

[0026] The bottom of the extraction box 1 is fixedly connected with four support legs 2. The four support legs 2 are fixedly connected at equal intervals at the four corners of the bottom of the extraction box 1. The four support legs 2 at the bottom of the extraction box 1 can provide stable support for the extraction box 1.

[0027] The front of the extraction chamber 1 is hinged to a door 3. An observation window 5 is fixedly connected to the inner wall of the door 3. A handle 6 is fixedly connected to the front of the door 3. The door 3 and handle 6 on the front of the extraction chamber 1 make it easy for the operator to pull the handle 6 to flip the door 3, thereby facilitating the removal and placement of the extraction tube 415 inside the extraction chamber 1. When the solution is being extracted inside the extraction chamber 1, the operator can observe the extraction process of the solution inside the extraction chamber 1 through the observation window 5 inside the door 3.

[0028] There are four fixing posts 411, which are located at the four outer corners of the bearing plate 414;

[0029] There are two rubber blocks 4113, located on both sides of the extraction tube 415.

[0030] Example 2

[0031] The difference from Example 1 is that this example discloses an extraction component, such as... Figure 4 As shown:

[0032] The extraction chamber 1 is also equipped with an extraction assembly 42. The extraction assembly 42 includes an electric push rod 421 fixedly connected to the top of the inner wall of the extraction chamber 1. The output end of the electric push rod 421 is fixedly connected to a positioning frame 422. A T-shaped block 423 is slidably connected to the inner wall of the positioning frame 422. A screw 424 is threadedly connected to the right inner wall of the positioning frame 422. The outer wall of the other end of the screw 424 is threadedly connected to the right inner wall of the T-shaped block 423. An extraction head 425 is fixedly connected to the bottom center of the T-shaped block 423. By setting up the extraction assembly 42, when it is necessary to extract the solution inside the extraction tube 415, The operator activates the electric push rod 421, causing it to extend and push the extraction head 425 into the extraction tube 415, thereby extracting the solution inside the extraction tube 415. When the extraction is complete and the extraction head 425 needs to be disassembled and maintained, the operator loosens the screw 424, causing it to disengage from the right side of the T-block 423. The operator then pulls out the T-block 423, causing it to pull the extraction head 425 out together, thus facilitating maintenance of the extraction head 425.

[0033] Working Principle: During the extraction process, to improve the stability of the solution inside the extraction tube 415, the extraction tube 415 needs to be clamped and fixed first. At this time, the operator places the extraction tube 415 on top of the support plate 414, and then turns on the drive motor 419 to cause the bidirectional threaded rod 4110 to rotate. During the rotation of the bidirectional threaded rod 4110, the two clamping plates 4112 are limited by the rectangular frame 417, causing the two socket blocks 4111 to move closer together along the outer wall of the bidirectional threaded rod 4110. When the two socket blocks 4111... When the two clamping plates 4112 are brought closer together, the rubber blocks 4113 on the sidewalls of the two clamping plates 4112 can squeeze and fix the two sides of the extraction tube 415, thereby improving the stability during the extraction process of the solution. When the extraction tube 415 shakes during the extraction process, it will drive the support plate 414 to move downward, causing the support plate 414 to drive the limiting block 412 to move downward, causing the limiting block 412 to move downward along the outer wall of the fixing column 411 and compress the spring 413, thereby achieving the purpose of buffering the support plate 414 and the extraction tube 415.

[0034] When it is necessary to extract the solution inside the extraction tube 415, the operator activates the electric push rod 421, causing it to extend and push the extraction head 425 into the extraction tube 415, thereby extracting the solution inside the extraction tube 415. After the solution extraction is completed, when it is necessary to disassemble and maintain the extraction head 425, the operator loosens the screw 424, causing it to disengage from the right side of the T-block 423. The operator then pulls out the T-block 423, causing it to pull out the extraction head 425 together, thus facilitating maintenance of the extraction head 425.

[0035] The above description is merely an illustrative embodiment of this utility model and is not intended to limit the scope of this utility model. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of this utility model should fall within the protection scope of this utility model. Furthermore, it should be noted that the components of this utility model are not limited to the overall application described above. Each technical feature described in the specification of this utility model can be used individually or in combination as needed. Therefore, this utility model naturally covers other combinations and specific applications related to this application.

Claims

1. A solid-phase microextraction auxiliary device, comprising an extraction chamber (1); And an auxiliary component (41) disposed inside the extraction chamber (1), characterized in that: The auxiliary component (41) includes a fixed column (411) fixedly connected to the bottom of the inner wall of the extraction tank (1). A limit block (412) is slidably connected to the outer wall of the fixed column (411). A spring (413) is fixedly connected to the bottom of the limit block (412). A support plate (414) is fixedly connected to the other end of the limit block (412). An extraction tube (415) is slidably connected to the top center of the support plate (414). A connecting plate (416) is fixedly connected to the top of the support plate (414). A rectangular frame (417) is fixedly connected to the top of the connecting plate (416). A fixed... A base (418) is fixedly connected to the top inner wall of the fixed base (418), and a bidirectional threaded rod (4110) is fixedly connected to the output end of the drive motor (419). Two sleeve blocks (4111) are symmetrically threaded to the outer wall of the bidirectional threaded rod (4110). A clamping plate (4112) is fixedly connected to the side wall of the sleeve block (4111). The outer wall of the clamping plate (4112) is slidably connected to the inner wall of the rectangular frame (417). A rubber block (4113) is fixedly connected to the side wall of the clamping plate (4112). The side wall of the rubber block (4113) is slidably connected to the outer wall of the extraction tube (415).

2. The solid-phase microextraction auxiliary device according to claim 1, characterized in that: The extraction chamber (1) is also equipped with an extraction assembly (42). The extraction assembly (42) includes an electric push rod (421) fixedly connected to the top of the inner wall of the extraction chamber (1). The output end of the electric push rod (421) is fixedly connected to a positioning frame (422). A T-shaped block (423) is slidably connected to the inner wall of the positioning frame (422). A screw (424) is threadedly connected to the right inner wall of the positioning frame (422). The outer wall of the other end of the screw (424) is threadedly connected to the right inner wall of the T-shaped block (423). An extraction head (425) is fixedly connected to the bottom center of the T-shaped block (423).

3. The solid-phase microextraction auxiliary device according to claim 1, characterized in that: The bottom of the extraction box (1) is fixedly connected to a support leg (2). There are four support legs (2), which are fixedly connected at equal intervals at the bottom of the four corners of the extraction box (1).

4. The solid-phase microextraction auxiliary device according to claim 1, characterized in that: The front of the extraction box (1) is connected to a door (3) via a hinge. An observation window (5) is fixedly connected to the inner wall of the door (3). A handle (6) is fixedly connected to the front of the door (3).

5. The solid-phase microextraction auxiliary device according to claim 1, characterized in that: There are four fixing posts (411), which are located at the four corners of the bearing plate (414).

6. The solid-phase microextraction auxiliary device according to claim 1, characterized in that: There are two rubber blocks (4113), which are located on both sides of the extraction tube (415).

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