A fabric decomposable carcinogenic aromatic amine detection pretreatment device

Abstract

A kind of fabric decomposable carcinogenic aromatic amine detection pretreatment device relates to textile detection equipment field, including base, constant-temperature water bath, two-axis linear module, sample holder, liquid adding mechanism and sealing mechanism, sample holder is movably arranged on two-axis linear module can be opposite with constant-temperature water bath;Liquid adding mechanism is set up in constant-temperature water bath left and right sides can be opposite with sample holder to carry out liquid adding to sample bottle, including several liquid outlets that can be one-to-one with each column of holding groove in sample holder, each column of holding groove in sample holder sequentially passes below liquid outlet with two-axis linear module;Sealing mechanism is liftable and is set up on sample holder can be lowered to seal sample bottle in sample holder or be raised to above liquid adding mechanism so as to sample holder moves to below liquid outlet.Full automation can be carried out, without manual intervention, improve detection efficiency, reduce the risk of staff exposed to harmful volatile substances simultaneously, with high practicability.

Description

Technical Field

[0001] This utility model belongs to the field of textile testing equipment, specifically a pretreatment device for detecting decomposable carcinogenic aromatic amines in fabrics. Background Technology

[0002] Under the globalized consumer product safety regulatory system, decomposable carcinogenic aromatic amines in textiles, leather, and synthetic leather products have become a core control target. Mandatory standards such as the EU REACH regulation and China's GB 18401 (Textiles) and GB 20400 (Leather) establish stringent health protection measures with stringent limits. Among them, the detection method described in GB / T 17592 "Determination of Banned Azo Dyes" is the most widely used method in this field. It requires immersing the sample in a citrate-sodium hydroxide buffer solution, thoroughly shaking, and then maintaining a constant temperature water bath for a period of time. Afterward, an aqueous solution of sodium dithionite is added, followed by thorough shaking and another constant temperature water bath to complete the reduction and pyrolysis, serving as pretreatment for subsequent spectroscopic measurements. Existing testing methods typically rely on manual operation. Given the massive amounts of samples involved in actual testing, manual testing is inefficient. Furthermore, the pretreatment process requires repeatedly opening and closing sample bottles to add test solutions, exposing staff to potentially harmful volatile substances for extended periods, posing certain safety hazards. Additionally, some existing semi-automated equipment, such as constant temperature water baths and shaking devices, are incompatible with each other, still requiring frequent manual intervention, which limits the improvement in testing efficiency and needs further improvement. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a pretreatment device for detecting decomposable carcinogenic aromatic amines in fabrics.

[0004] The present invention adopts the following technical solution: A pretreatment device for detecting biodegradable carcinogenic aromatic amines in fabrics includes a base, a constant temperature water bath, two linear modules, a sample rack, a liquid addition mechanism, and a sealing mechanism. The constant temperature water bath is mounted on the base. The two linear modules include a transverse electric slide extending in the left-right direction and a longitudinal electric slide perpendicularly mounted on the transverse electric slide. The sample rack is vertically mounted on the longitudinal electric slide and faces the constant temperature water bath, and can be raised or lowered to move away from or into the constant temperature water bath. It is formed by several placement slots for placing sample bottles. The liquid addition mechanism is located on the left and right sides of the constant temperature water bath and faces the sample rack to add liquid to the sample bottles. It includes several outlets that correspond one-to-one with each row of placement slots in the sample rack. Each row of placement slots in the sample rack passes below the outlets sequentially with the transverse electric slide. The sealing mechanism is vertically mounted on the sample rack and can be lowered to seal the sample bottles in the sample rack or raised above the liquid addition mechanism so that the sample rack can move below the outlets.

[0005] Preferably, it also includes a control console, which is mounted on the base and connected to the constant temperature water bath, the two linear modules, the liquid addition mechanism and the sealing mechanism respectively. The control console controls the sample rack to add liquid sequentially through the liquid outlets on both sides according to preset parameters.

[0006] Preferably, the liquid addition mechanism further includes a liquid storage tank, a vertical extension rod, a horizontal extension rod, and a micro-precision pump. Two liquid storage tanks are provided, which are set on the base and located on both sides of the constant temperature water bath. The liquid storage tank is used to temporarily store the test solution and is provided with an opening or closing liquid addition port. The vertical extension rod extends upward from the top of the liquid storage tank. The horizontal extension rod extends forward from the top of the vertical extension rod to the top of the sample rack, and the liquid outlet is located at the bottom of the horizontal extension rod. The micro-precision pump is installed in the liquid storage tank in a one-to-one correspondence with the liquid outlet and is connected to the liquid outlet through the pipes in the vertical extension rod and the horizontal extension rod.

[0007] Preferably, the liquid addition mechanism and the two axial linear modules are located on the front and rear sides of the base, respectively. The vertical extension rod is located in a position that cannot be touched when the sample rack moves left and right. When the sample rack moves to the rightmost or leftmost end with the horizontal electric slide, the placement slot on the sample rack has passed below the liquid outlet.

[0008] Preferably, the sealing mechanism includes a sealing cap, an elastic sealing cover, and a lifting electric slide. The sealing cap is opposite to and above the sample holder. Several elastic sealing covers are provided, located at the bottom of the sealing cap and corresponding to the placement slots. The lifting electric slide is connected between the sealing cap and the sample holder, and can drive the sealing cap to move downward so that the elastic sealing cover contacts and seals the sample bottle opening in the placement slot, or drive the sealing cap to move upward above the liquid addition mechanism so that the sample holder is opposite to the liquid outlet.

[0009] Preferably, it also includes a positioning mechanism, which includes a positioning groove, a positioning ring, and a positioning block. Several positioning grooves are provided and are recessed downward from the top surface of the sample holder. The positioning ring corresponds to the placement groove one by one, is adapted to the diameter of the sample bottle, and is sleeved on the outside of the sample bottle with its axis coinciding with the axis of the elastic sealing cover. The positioning block is connected between each positioning ring and corresponds to each positioning groove to be embedded and installed in the positioning mechanism.

[0010] Preferably, the sealing mechanism further includes a threaded groove, a through hole, and a threaded block. The threaded groove is recessed from the top of the sealing cover and corresponds one-to-one with the placement groove. The through hole extends from the bottom of the threaded groove and has a diameter smaller than that of the threaded groove. The threaded block is threadedly connected to the threaded groove and disposed therein. The elastic sealing cover is disposed at the bottom of the threaded block and installed with the threaded block to pass through the through hole and contact the mouth of the sample bottle.

[0011] Preferably, the elastic sealing cover is made of fluororubber material that can withstand both citrate-sodium hydroxide buffer solution and sodium dithionite aqueous solution.

[0012] Preferably, the threaded block is formed with a rotating handle that facilitates the rotation, disassembly, or installation of the threaded block.

[0013] Preferably, the distance between the bottom of the liquid outlet and the top surface of the constant temperature water bath is greater than the total height of the sample bottle placed in the sample rack.

[0014] As can be seen from the above description of the present invention, compared with the prior art, the beneficial effects of the present invention are as follows: the sample rack can move in the left and right directions and up and down directions through two axial linear modules, so that each column of sample bottles in the sample rack can be moved to the bottom of the liquid addition mechanism and opposite the liquid outlet for liquid addition. Citrate-sodium hydroxide buffer solution and sodium dithionite aqueous solution are added through the liquid addition mechanisms on the left and right sides respectively, and after addition, the sample rack is moved to the constant temperature water bath for constant temperature water bath through the two axial linear modules. The two constant temperature water baths and two additions of test solutions required for pretreatment in the test standard can be carried out automatically without manual intervention, which improves the detection efficiency and reduces the risk of staff being exposed to harmful volatile substances. It has high practicality. The liquid addition mechanism can precisely control the volume of solution added to the sample vial through a miniature precision pump that corresponds one-to-one with the liquid outlet, so as to meet the detection requirements; The liquid dispensing mechanism and the two axial linear modules are located on the front and rear sides of the base respectively, without interfering with each other, to avoid mutual interference between the two axial linear modules and the liquid dispensing mechanism when they move. In addition, the length of the transverse electric slide must meet the movement requirements of the sample rack so that all the sample slots inside can be opposite the liquid outlet. The sealing cap is used to seal the sample bottle to prevent the solution from evaporating and affecting the test results when the sample bottle is immersed in the constant temperature water bath. The elastic sealing cover is always pressed against the mouth of the sample bottle by the lifting electric slide. When adding liquid, the sealing cap can also be moved upward to above the liquid adding mechanism by the lifting electric slide to avoid affecting the passage of the sample rack. At the same time, by keeping the lifting electric slide stationary during sealing, the two axial linear modules can be driven to move up and down or left and right quickly to fully realize the shaking sample bottle function described in the detection method. By installing the positioning ring through the positioning groove, the sample bottle in the positioning ring is aligned with the elastic sealing cover, which avoids the problem of misalignment between the sample bottle mouth and the elastic sealing cover when the sealing cap is facing down to seal the sample bottle, and further improves the sealing effect. The elastic sealing cover is installed on the removable threaded block, which can be removed for separate cleaning without disassembling the entire machine, thus improving the ease of operation of the device. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the sample holder and sealing cap of this utility model; Figure 4 This is a cross-sectional view of the structure of this utility model; Figure 5 This is a cross-sectional view of the sample holder of this utility model located in a constant temperature water bath. Figure 6 This is a schematic diagram of the sample holder and positioning mechanism of this utility model; Figure 7 This is a schematic diagram of the liquid dispensing mechanism of this utility model; Figure 8 This is a diagram showing the working state of the first liquid addition of this utility model; Figure 9 This is a diagram showing the working state of the second liquid addition in this invention. In the diagram: 1-Base; 2-Constant temperature water bath; 3-Dual-axis linear module; 31-Horizontal electric slide; 32-Vertical electric slide; 4-Sample rack; 41-Placement slot; 42-Support leg; 43-Extension section; 5-Liquid filling mechanism; 51-Liquid outlet; 52-Liquid storage tank; 53-Vertical extension rod; 54-Horizontal extension rod; 55-Miniature precision pump; 56-Liquid filling port; 6-Sealing mechanism; 61-Sealing cap; 62-Elastic sealing cover; 63-Lifting electric slide; 64-Threaded groove; 65-Through hole; 66-Threaded block; 67-Rotating handle; 7-Positioning mechanism; 71-Positioning groove; 72-Positioning ring; 73-Positioning block; 8-Control console. Detailed Implementation

[0016] The present invention will be further described below through specific embodiments.

[0017] Reference Figures 1 to 9 As shown, a pretreatment device for detecting decomposable carcinogenic aromatic amines in fabrics includes a base 1, a constant temperature water bath 2, two linear modules 3, a sample holder 4, a liquid addition mechanism 5, a sealing mechanism 6, a positioning mechanism 7, and a control console 8.

[0018] The base 1 is equipped with a transformer power supply box that connects to each device.

[0019] The constant temperature water bath 2 is mounted on the base 1 and provides a constant temperature water bath environment. Specifically, the constant temperature water bath 2 is a common device in the art that can perform the function of a constant temperature water bath, and it is not the focus of this application. Its structure and selection will not be described in further detail here.

[0020] The dual-axis linear module 3 includes a transverse electric slide 31 extending in the left-right direction and mounted on the base 1, and a longitudinal electric slide 32 vertically mounted on the transverse electric slide 31. Specifically, the electric slide is a common device in the prior art that can precisely control the linear motion of an object, and is not the focus of this application. Its structure and selection will not be further described here.

[0021] The sample holder 4 is height-adjustable and mounted on the longitudinal electric slide 32, opposite to the constant temperature water bath 2. It can be raised and lowered to move away from or into the constant temperature water bath 2. A 4x6 rectangular array forms 4 rows and 6 columns of placement slots 41 for placing sample vials. Specifically, the placement slots 41 are through-hole, ensuring that liquid can enter the placement slots 41 and contact the sample vials when the sample holder 4 is placed into the constant temperature water bath 2. The bottom of the placement slots 41 has four inwardly extending support legs 42, with the intersection of the extension lines of each support leg 42 centrally located. These support legs have inclined surfaces that align with the bottom structure of the sample vials, ensuring that the sample vials are positioned at the midpoint of the placement slots 41. Furthermore, an extension section 43 extends upward from the side of the sample holder 4 opposite to the longitudinal electric slide 32. The longitudinal electric slide 32 connects to the top of the extension section 43, allowing the sample holder 4 to fully extend into the constant temperature water bath 2 through the extension section 43 during descent, without the longitudinal electric slide 32 colliding with the constant temperature water bath 2.

[0022] The liquid addition mechanism 5 is located on the left and right sides of the constant temperature water bath 2, opposite the sample rack 4, to add liquid to the sample bottles. It includes a liquid outlet 51, a liquid storage tank 52, a vertical extension rod 53, a horizontal extension rod 54, and a micro-precision pump 55. There are four liquid outlets 51, each corresponding to a different row of placement slots 41 in the sample rack 4. Each row of placement slots 41 in the sample rack 4 passes below the liquid outlet 51 sequentially along with the transverse electric slide 31. There are two liquid storage tanks 52, mounted on the base 1 and located on either side of the constant temperature water bath 2. The sample holder 52 has two sides, one for storing citrate-sodium hydroxide buffer solution and the other for storing sodium dithionite aqueous solution. Each side has an openable / closeable inlet 56. A vertical extension rod 53 extends upwards from the top of the storage tank 52. A horizontal extension rod 54 extends forward from the top of the vertical extension rod 53 to the top of the sample holder 4, with an outlet 51 located at the bottom of the horizontal extension rod 54. A micro-precision pump 55 is installed in the storage tank 52, corresponding to each outlet 51, and connected to the outlet 51 via tubing in the vertical and horizontal extension rods 53 and 54. The inlet 55 precisely controls the volume of solution added to the sample vial through the micro-precision pumps 55 corresponding to each outlet 51 to meet detection requirements. Specifically, the liquid addition mechanism 5 and the two axial linear modules 3 are located on the front and rear sides of the base 1, respectively. The vertical extension rod 53 is positioned so as not to be touched when the sample holder 4 moves left or right. When the sample holder 4 moves to the rightmost or leftmost end with the horizontal electric slide 31, the placement slots 41 on the sample holder 4 are all below the liquid outlet 51, avoiding interference between the two axial linear modules 3 and the liquid addition mechanism 5 when they move. The length of the horizontal electric slide 31 must meet the movement requirements of the sample holder 4, so that all the sample slots inside can be aligned with the liquid outlet 51. Furthermore, the distance between the bottom of the liquid outlet 51 and the top surface of the constant temperature water bath 2 is greater than the total height of the sample bottle placed in the sample holder 4, ensuring the passability of the sample holder 4 and preventing the top of the sample bottle from touching the horizontal extension rod and causing damage to the sample bottle.

[0023] The sealing mechanism 6 is vertically adjustable and mounted on the sample rack 4. It can descend to seal the sample bottles in the sample rack 4 or rise above the liquid dispensing mechanism 5 so that the sample rack 4 can move below the liquid outlet 51. It includes a sealing cap 61, an elastic sealing cover 62, a lifting electric slide 63, a threaded groove 64, a through hole 65, and a threaded block 66. The sealing cap 61 is opposite to and above the sample rack 4. Several elastic sealing covers 62 are provided, located at the bottom of the sealing cap 61 and corresponding to the placement groove 41. The lifting electric slide 63 is connected between the sealing cap 61 and the sample rack 4, and can drive the sealing cap 61 downward to contact and seal the elastic sealing cover 62 with the sample bottle opening in the placement groove 41, or drive the sealing cap 61 upward to the liquid dispensing mechanism. The sample holder 4 is positioned above the liquid outlet 51. The threaded groove 64 is recessed from the top of the sealing cap 61 and corresponds to the placement groove 41. The through hole 65 is formed from the bottom of the threaded groove 64 and has a diameter smaller than that of the threaded groove 64. The threaded block 66 is threadedly connected to the threaded groove 64 and is provided therein. The threaded block 66 has a rotating handle 67 formed on it to facilitate the rotation, disassembly or installation of the threaded block 66. The elastic sealing cover 62 is provided at the bottom of the threaded block 66 and is installed with the threaded block 66 to pass through the through hole 65 and contact the mouth of the sample bottle. The sealing cap 61 is used to seal the sample bottle to prevent the solution from evaporating and affecting the test results when the sample bottle is immersed in the constant temperature water bath 2. The elastic sealing cover 62 is always pressed against the mouth of the sample bottle by the lifting electric slide 63. When adding liquid, the sealing cap 61 can also be moved upward above the liquid adding mechanism 5 by the lifting electric slide 63 so as not to affect the passage of the sample rack 4. At the same time, by keeping the lifting electric slide 63 stationary during sealing, the two axial linear modules 3 can be driven to move up and down or left and right quickly to fully detect the oscillating sample bottle function described in the test method.

[0024] Specifically, the bottom of the elastic sealing cover 62 is recessed inward to allow the sample vial to extend into a groove. The diameter of the groove is always larger than the diameter of the sample vial opening to maintain a seal, and the edge of the groove is chamfered to facilitate the insertion of the sample vial opening. Furthermore, the elastic sealing cover 62 is made of fluororubber material that can withstand both citrate-sodium hydroxide buffer solution and sodium dithionite aqueous solution. The fluororubber material does not contain azo dyes, thus avoiding interference with the detection structure.

[0025] The positioning mechanism 7 includes positioning grooves 71, positioning rings 72, and positioning blocks 73. Several positioning grooves 71 are recessed downwards from the top surface of the sample holder 4. The positioning rings 72 correspond one-to-one with the placement grooves 41, are adapted to the diameter of the sample bottle, and are fitted onto the outside of the sample bottle, with their axes coinciding with the axes of the elastic sealing cover 62 and the liquid outlet 51, ensuring accurate flow of solution from the sample bottle opening. The positioning blocks 73 are connected between the positioning rings 72 and correspond one-to-one with the positioning grooves 71 to embed and install the positioning mechanism 7. Installing the positioning rings 72 through the positioning grooves 71 ensures that the sample bottle in the positioning ring 72 is aligned with the elastic sealing cover 62, avoiding the problem of misalignment between the sample bottle opening and the elastic sealing cover 62 when the sealing cap 61 seals the sample bottle downwards, further improving the sealing effect. Simultaneously, the positioning mechanism 7 can be replaced to accommodate sample bottles of different diameters, improving the adaptability of the device.

[0026] The control console 8 is set on the base 1 and is connected to the constant temperature water bath 2, the two-axis linear module 3, the micro precision pump 55 and the lifting electric slide 63 respectively. According to the preset water bath temperature, water bath time, liquid addition volume and other parameters, the control console 8 controls the sample rack 4 to add liquid sequentially through the liquid outlets 51 on both sides.

[0027] In use, first cut the sample, then open the sample bottle cap and place it inside (without re-closing the cap). Next, turn on the device, manually reset the sample rack 4, and move the sealing cap 61 upwards to its highest position. Place the sample bottles sequentially in the placement slots 41, and simultaneously install the positioning mechanism 7. Then, preset the parameters required for the test and start the device. The sample rack 4 and sealing cap 61 maintain the maximum distance between them. The two linear modules 3 control the sample rack 4 to move to the left, below the left-side liquid addition mechanism 5, and sequentially pass below the outlet 51. Stopping after each row of sample bottles and controlling the micro-precision pump 55 to deliver citrate-sodium hydroxide buffer solution (the placement slots 41 are evenly spaced, the outlet 51 is fixed in position, and its position on the coordinate axis can be precisely located; the two linear modules 3 can precisely control the alignment of the sample bottles with the outlet 51). After the first liquid addition is completed, the sample holder 4 and the sealing cap 61 are horizontally reset to the center position. The sealing cap 61 moves downward to seal the sample bottle. At this time, the two-axis linear module 3 controls the sample holder 4 to move up and down rapidly, fully shaking and wetting the sample in the sample bottle. Then, the sample holder 4 is controlled to move downward so that most of the sample bottle, except for the bottle mouth, is immersed in the constant temperature water bath 2 (the lifting electric slide 63 is prohibited during the movement and water bath process, and the sealing cap 61 maintains the sealing effect). After the first water bath time is over, the sample holder 4 is raised and the sealing cap 61 is raised to the highest position. The sample holder 4 is driven to move to the right to below the right liquid addition mechanism 5, and passes under the liquid outlet 51 in sequence. It stops after passing each row of sample bottles and controls the micro precision pump 55 to deliver sodium dithionite aqueous solution. After the second liquid addition is completed, the sample holder 4 and the sealing cap 61 are horizontally reset to the center position. The sealing cap 61 then moves downwards to seal the sample bottle. At this time, the two axial linear modules 3 control the sample holder 4 to move up and down rapidly, allowing the sample inside the bottle to be fully shaken and wetted. Then, the sample holder 4 is controlled to move downwards so that most of the sample bottle, except for the bottle opening, is immersed in the constant temperature water bath 2. After the second water bath time is over, the sample holder 4 and the sealing cap 61 are raised, allowing the sample bottle to be exposed to air and cooled for a period of time until it reaches room temperature before the machine is stopped. Finally, the operator controls the sealing cap 61 to rise and recapsulates the sample bottle in sequence, completing the pretreatment work, and then transfers the sample bottle for subsequent spectroscopic detection. When using this application for detection, the two constant temperature water baths and two additions of test solutions can be performed fully automatically without manual intervention, improving detection efficiency and reducing the risk of operators being exposed to harmful volatile substances, making it highly practical.

[0028] The above description is merely a preferred embodiment of the present utility model, and therefore cannot be construed as limiting the scope of the present utility model. All equivalent changes and modifications made in accordance with the scope of the patent application and the contents of the specification of the present utility model shall still fall within the scope of the patent of the present utility model.

Claims

1. A pretreatment device for detecting decomposable carcinogenic aromatic amines in fabrics, characterized in that: The device includes a base, a constant temperature water bath, two linear modules, a sample holder, a liquid dispensing mechanism, and a sealing mechanism. The constant temperature water bath is mounted on the base. The two linear modules include a transverse electric slide extending left and right on the base and a longitudinal electric slide perpendicular to the transverse electric slide. The sample holder is height-adjustable on the longitudinal electric slide and faces the constant temperature water bath. It can be raised and lowered to move away from or into the constant temperature water bath, and is formed by several placement slots for placing sample bottles. The liquid dispensing mechanism is located on the left and right sides of the constant temperature water bath and faces the sample holder to dispensing liquid into the sample bottles. It includes several liquid outlets that correspond one-to-one with each column of placement slots in the sample holder. Each column of placement slots in the sample holder passes below the liquid outlets sequentially with the transverse electric slide. The sealing mechanism is height-adjustable on the sample holder and can be lowered to seal the sample bottles in the sample holder or raised above the liquid dispensing mechanism so that the sample holder can move below the liquid outlets.

2. The pretreatment device for detecting decomposable carcinogenic aromatic amines in fabrics according to claim 1, characterized in that: It also includes a control console, which is mounted on the base and connected to the constant temperature water bath, the two linear modules, the liquid addition mechanism and the sealing mechanism respectively. According to preset parameters, the control console controls the sample rack to add liquid sequentially through the liquid outlets on both sides.

3. The pretreatment device for detecting decomposable carcinogenic aromatic amines in fabrics according to claim 1, characterized in that: The liquid addition mechanism also includes a liquid storage tank, a vertical extension rod, a horizontal extension rod, and a micro-precision pump. There are two liquid storage tanks, which are set on the base and located on both sides of the constant temperature water bath. The liquid storage tank is used to temporarily store the test solution and is provided with an opening or closing liquid inlet. The vertical extension rod extends upward from the top of the liquid storage tank. The horizontal extension rod extends forward from the top of the vertical extension rod to the top of the sample rack. The liquid outlet is located at the bottom of the horizontal extension rod. The micro-precision pump is installed in the liquid storage tank in a one-to-one correspondence with the liquid outlet and is connected to the liquid outlet through the pipes in the vertical and horizontal extension rods.

4. The pretreatment device for detecting decomposable carcinogenic aromatic amines in fabrics according to claim 3, characterized in that: The liquid addition mechanism and the two linear modules are located on the front and rear sides of the base, respectively. The vertical extension rod is located in a position that cannot be touched when the sample rack moves left and right. When the sample rack moves to the rightmost or leftmost end with the horizontal electric slide, the placement slot on the sample rack has passed below the liquid outlet.

5. The pretreatment device for detecting decomposable carcinogenic aromatic amines in fabrics according to claim 1, characterized in that: The sealing mechanism includes a sealing cap, an elastic sealing cover, and a lifting electric slide. The sealing cap is opposite to and above the sample holder. Several elastic sealing covers are provided, located at the bottom of the sealing cap and corresponding to the placement slots. The lifting electric slide is connected between the sealing cap and the sample holder, and can drive the sealing cap to move downward so that the elastic sealing cover contacts and seals the sample bottle mouth in the placement slot, or drive the sealing cap to move upward above the liquid addition mechanism so that the sample holder is opposite to the liquid outlet.

6. The pretreatment device for detecting decomposable carcinogenic aromatic amines in fabrics according to claim 5, characterized in that: It also includes a positioning mechanism, which includes a positioning groove, a positioning ring, and a positioning block. Several positioning grooves are provided and are recessed downward from the top surface of the sample holder. The positioning rings correspond one-to-one with the placement grooves, are adapted to the diameter of the sample bottle, and are fitted on the outside of the sample bottle with their axis coinciding with the axis of the elastic sealing cover. The positioning blocks are connected between the positioning rings and correspond one-to-one with the positioning grooves to embed and install the positioning mechanism.

7. The pretreatment device for detecting decomposable carcinogenic aromatic amines in fabrics according to claim 5, characterized in that: The sealing mechanism further includes a threaded groove, a through hole, and a threaded block. The threaded groove is recessed downwards from the top surface of the sealing cover and corresponds one-to-one with the placement groove. The through hole extends downwards from the bottom surface of the threaded groove and has a diameter smaller than the diameter of the threaded groove. The threaded block is threadedly connected to the threaded groove and disposed therein. The elastic sealing cover is installed at the bottom of the threaded block and is installed with the threaded block to pass through the through hole and contact the mouth of the sample bottle.

8. The pretreatment device for detecting decomposable carcinogenic aromatic amines in fabrics according to claim 5, characterized in that: The elastic sealing cover is made of fluororubber material that can withstand both citrate-sodium hydroxide buffer solution and sodium dithionite aqueous solution.

9. The pretreatment device for detecting decomposable carcinogenic aromatic amines in fabrics according to claim 7, characterized in that: The threaded block is formed with a rotating handle that facilitates the rotation, disassembly, or installation of the threaded block.

10. The pretreatment device for detecting decomposable carcinogenic aromatic amines in fabrics according to claim 1, characterized in that: The distance between the bottom of the liquid outlet and the top surface of the constant temperature water bath is greater than the total height of the sample bottle placed in the sample rack.

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