Biological analysis device for fishes and crustaceans

Abstract

The invention relates to the technical field of biological analysis, in particular to a fish and crustacean biological analysis device which comprises a placing frame and a mobile phase solvent bottle placed in the upper portion of the placing frame, a vacuum degassing box is connected to the lower portion of the placing frame, and a high-pressure pump box is connected to the lower portion of the vacuum degassing box. A sample injection box is connected to the lower part of the high-pressure pump box, a detection box is connected to the lower part of the column oven, an automatic sample injector is arranged in the sample injection box above the placing frame, and a chromatographic column is connected to the interior of the column oven. According to the biological analysis device for the fishes and the crustaceans, through slight shaking in multiple directions, the uniform shaking efficiency and effect of a sample solution in the sample solvent bottle can be improved, the situation that particles settle to the bottom of the bottle and are layered due to long-time standing of the sample solvent bottle is avoided, the concentration of the sample solution sucked by an automatic sample injector is uniform, and the accuracy of the sample solution is improved. Therefore, the accuracy of the detection result of the biological analysis device can be improved, and the biological analysis work of fishes and crustaceans cannot be influenced.

Description

Technical Field

[0001] This invention relates to the field of biological analysis technology, specifically to a biological analysis device for fish and crustaceans. Background Technology

[0002] Biological analysis of fish and crustaceans involves a variety of techniques, among which liquid chromatography (LC) is an important instrument. LC can analyze the metabolites of fish and crustaceans, allowing for the study of changes in amino acids, sugars, lipids, and other metabolic products. This facilitates the assessment of physiological state, environmental stress, and nutritional status. It can also detect residual levels of antibiotics, hormones, or environmental pollutants in aquatic products and analyze wastewater generated during fish and crustacean farming to determine whether it meets direct discharge standards. This helps prevent the direct discharge of substandard wastewater and the resulting water pollution, enabling effective control and treatment of water pollution. Therefore, biological analysis devices using liquid chromatography provide fundamental data for aquaculture, resource assessment, and ecological protection. For example, the prior art patent with publication number "CN111007178B" entitled "A Liquid Chromatograph and Its Usage Method" discloses that by setting up an arc-shaped clamp, a cylinder, and a rubber pad, when placing the liquid storage bottle, the liquid storage bottle is first placed on the top surface of the machine body. The cylinder drives two fixing plates to move closer together, and the arc-shaped clamp fits against the outer wall of the liquid storage bottle until the arc-shaped clamp clamps the liquid storage bottle tightly. The rubber pad acts as a shock absorber and buffer, and at the same time, the rubber pad and the protrusion increase the friction between the arc-shaped clamp and the liquid storage bottle. Because the liquid storage bottle is tightly clamped by the two arc-shaped clamps, even if the machine body is impacted and vibrates, the liquid storage bottle will not tip over, improving the stability of the liquid storage bottle placement. Another example is the prior art patent with publication number "CN118067888". The patent disclosed in "B" is titled "A Cyclic High-Performance Liquid Chromatograph," which discloses that the injection head is connected to the sample solvent bottle via a tubing. The sample solution is the substance to be detected, while the mobile phase solution is responsible for carrying the sample solution into the chromatographic column for separation. By maintaining the independence of the sample solvent bottle and the mobile phase solvent bottle, solutions can be easily replaced or added, improving the efficiency of the instrument. In actual use, the operator can connect the injection head to the sample solvent bottle via the tubing. When a sample needs to be injected, the injection head is opened, and the sample solution is forced into the sample injector cavity through the tubing under external pressure, mixing with the mobile phase. This design ensures the accuracy and stability of sample injection while simplifying the operation process.

[0003] In the aforementioned prior art, the sample solvent bottle is fixedly placed above the mounting housing. When the sample solution contains insoluble particles (such as tissue homogenate, particulate suspension, etc.), the particles will settle to the bottom of the bottle and separate into layers due to prolonged standing. This results in the dispensing head drawing the upper clear liquid, leading to uneven concentration and errors in the detection results. Consequently, this affects the biological analysis of fish and crustaceans. Therefore, we propose a biological analysis device for fish and crustaceans to solve the problems mentioned above. Summary of the Invention

[0004] The purpose of this invention is to provide a biological analysis device for fish and crustaceans, to solve the problem mentioned in the background art. In existing sample solvent bottles, which are fixedly placed on top of the mounting shell, when the sample solution contains insoluble particles (such as tissue homogenates, particulate suspensions, etc.), the particles settle to the bottom of the bottle and separate into layers due to prolonged standing. This results in the dispensing head drawing the upper clear liquid, leading to uneven concentration and errors in the detection results, thus affecting the biological analysis of fish and crustaceans.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a biological analysis device for fish and crustaceans, comprising a rack and a mobile phase solvent bottle placed inside the rack, a vacuum degassing chamber connected below the rack, a high-pressure pump box connected below the vacuum degassing chamber, an injection chamber connected below the high-pressure pump box, a column oven installed below the injection chamber, a detection chamber connected below the column oven, a placement frame slidably connected inside the left side of the injection chamber, a sample solvent bottle connected inside the placement frame via a slight shaking component, an autosampler installed inside the injection chamber located above the placement frame, and a chromatographic column connected inside the column oven.

[0006] Preferably, the upper surface of the placement frame has placement slots at equal intervals, and the slight shaking component includes a placement cavity installed inside the placement slot. The sample solvent bottle is placed inside the placement cavity with a concave-convex fit. Control slots are provided in the placement frame on both the front and rear sides of the placement slot, and the control slots are set at an angle. The space inside the control slot is connected to the space inside the placement slot.

[0007] Preferably, guide rollers are installed on both the front and rear sides of the placement cavity, and the outer ends of the guide rollers are inserted into the control groove, and a row of second magnet blocks is installed on the left side of the placement cavity.

[0008] Preferably, a support plate is fixed above the autosampler, and an electric push rod is installed above the support plate. The upper part of the electric push rod is connected to a slide rail assembly installed on the inner wall of the upper part of the injection box. The slide rail assembly is used to control the horizontal movement of the electric push rod and the autosampler.

[0009] Preferably, a vertical rod is fixed to the lower left side of the support plate, and a first magnet block is fixed to the lower right side of the vertical rod. The lower part of the vertical rod is inserted into the placement frame, and a second magnet block is provided to the right side of the first magnet block. The first magnet block and the second magnet block have the same magnetic poles.

[0010] Preferably, a guide rod is installed in a slot on the right side of the placement cavity, and a manual telescopic rod is fixed inside the right side of the placement slot. A return spring is nested on the outside of the manual telescopic rod, and a guide rod is slidably connected through the left end of the manual telescopic rod.

[0011] Preferably, a six-way valve is installed inside the right side of the injection chamber, the right side of the autosampler is connected to the left side of the six-way valve through a pipe, the bottom end of the six-way valve is connected to one end of the chromatographic column through a pipe, and the other end of the chromatographic column is connected to the detector in the detection chamber through a pipe. A waste liquid discharge pipe is installed on one side of the detection chamber, and the left end of the waste liquid discharge pipe penetrates the left side of the detection chamber.

[0012] Preferably, the upper interior of the placement rack has a receiving groove for placing the mobile phase solvent bottle.

[0013] Preferably, the receiving groove is internally engaged and slidably connected to a support plate, and the bottom surface of the support plate is connected to the bottom surface of the receiving groove via a connecting spring. Furthermore, one end of a connecting rope is connected to the right side of the support plate.

[0014] Preferably, two rotating rods are symmetrically and rotatably mounted on the upper surface of the placement rack, and a spiral spring is nested at the outer end of the rotating rod. The other end of a connecting rope is wound around the outer side of the rotating rod, and a support rod is fixed through the middle outer side of the rotating rod. At the same time, a support rod is fixed at the end of the support rod away from the rotating rod. The support rod and the support rod together form a "T" shaped structure.

[0015] Compared with the prior art, the beneficial effects of this invention are: This biological analysis device for fish and crustaceans, through gentle shaking in multiple directions, can improve the efficiency and effect of homogenizing the sample solution in the sample solvent bottle, avoiding the sedimentation and stratification of particles at the bottom of the bottle caused by prolonged standing of the sample solvent bottle. This ensures that the concentration of the sample solution drawn by the autosampler is uniform, thus improving the accuracy of the detection results of the biological analysis device without affecting the biological analysis of fish and crustaceans. The specific details are as follows: (1) When the vertical rod moves downward, the first magnet block corresponds to multiple second magnet blocks in sequence, so that the first magnet block generates a repulsive force on multiple second magnet blocks in sequence, which in turn causes the second magnet block to drive the placement cavity and sample solvent bottle to shake slightly from side to side. At the same time, the guide roller slides in the inclined control groove, which can drive the placement cavity and sample solvent bottle to shake slightly up and down. Therefore, the placement cavity and sample solvent bottle shake slightly from side to side and shake slightly up and down at the same time. Through the slight shaking in multiple directions, the shaking efficiency and effect of the sample solution in the sample solvent bottle can be improved, and the sample solvent bottle is prevented from being left to stand for a long time, which would cause the particles to settle to the bottom of the bottle and cause stratification. This makes the concentration of the sample solution drawn by the autosampler uniform, thus improving the accuracy of the detection results of the biological analysis device and not affecting the biological analysis of fish and crustaceans. (2) By setting the vertical rod and the first magnet block, the sample solvent bottle is simultaneously shaken slightly in multiple directions while the autosampler moves downward to prepare to draw the sample solution. This not only saves energy by eliminating the need for an additional power source, but also eliminates the need to stop the autosampler from working. Therefore, it does not affect the efficiency of the autosampler in drawing the sample solution, and can further improve the detection efficiency of the biological analysis device.

[0016] (3) At the same time, since the sample solution may contain dissolved gases during storage or pretreatment, slight mixing helps the microbubbles to aggregate and rise to the liquid surface, preventing the microbubbles from being sucked into the autosampler and causing inaccurate injection volume, thus further improving the accuracy of the detection results. (4) When the mobile phase solvent bottle is placed in the container, the weight of the mobile phase solvent bottle moves the support plate downward. The support plate pulls one end of the connecting rope, which in turn causes the other end of the connecting rope to rotate the rotating rod and the support rod. This allows the support rod to rotate the support rod, raising its height. This helps the support rod lift the delivery pipe above the mobile phase solvent bottle, preventing the connection between the delivery pipe and the mobile phase solvent bottle from bending and affecting the infusion operation. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the internal structure of the sample inlet box and column oven of the present invention; Figure 3 This is a schematic diagram of the three-dimensional structure of the placement frame of the present invention; Figure 4 This is a schematic diagram of the right view of the placement frame structure of the present invention; Figure 5 This is a partial cross-sectional view of the placement frame of the present invention; Figure 6This is a schematic diagram of the main cross-sectional structure of the placement frame of the present invention; Figure 7 This is a schematic diagram of the right-side structure of the placement cavity of the present invention; Figure 8 This is a schematic diagram of the cross-sectional structure of the cavity of the present invention; Figure 9 This is a schematic diagram of the downward moving structure of the vertical rod of the present invention; Figure 10 This is a top view of the placement rack structure in Embodiment 2 of the present invention; Figure 11 This is a cross-sectional view of the connection between the placement rack and the mobile phase solvent bottle in Embodiment 2 of the present invention; Figure 12 This is a schematic diagram of the three-dimensional structure after the support rod is rotated to a horizontal position in Embodiment 2 of the present invention.

[0018] In the diagram: 1. Placement rack; 2. Mobile phase solvent bottle; 3. Vacuum degassing chamber; 4. High-pressure pump box; 5. Sample injection chamber; 6. Column oven; 7. Detection chamber; 8. Six-way valve; 9. Placement frame; 91. Placement slot; 92. Control slot; 10. Chromatographic column; 11. Electric push rod; 12. Support plate; 13. Autosampler; 14. Vertical rod; 141. First magnet; 15. Placement cavity; 151. Second magnet; 152. Guide roller; 16. Sample solvent bottle; 17. Manual telescopic rod; 18. Reset spring; 19. Waste liquid discharge pipe; 20. Rotating rod; 201. Connecting rope; 202. Vortex spring; 21. Support rod; 22. Support rod; 23. Reception slot; 24. Support plate; 25. Connecting spring; 26. Guide rod. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-12 The present invention provides the following technical solution: Example 1: In this example of the fish and crustacean biological analysis device, when the autosampler 13 moves downward to prepare for liquid collection, the vertical rod 14 controls the placement chamber 15 and the sample solvent bottle 16 to perform slight shaking in multiple directions. This improves the mixing efficiency and effect of the sample solution in the sample solvent bottle 16, and avoids the sedimentation of particles to the bottom of the bottle and stratification caused by prolonged standing of the sample solvent bottle 16. Therefore, it can improve the accuracy of the detection results of the biological analysis device. For the specific structure, please refer to the attached diagram. Figures 1-9As shown, a mobile phase solvent bottle 2 is placed inside and above a rack 1. A vacuum degassing chamber 3 is connected below the rack 1, and a high-pressure pump box 4 is connected below the vacuum degassing chamber 3. An injection chamber 5 is connected below the high-pressure pump box 4, and a column oven 6 is installed below the injection chamber 5. A detection chamber 7 is connected below the column oven 6. A placement frame 9 is slidably connected inside the left side of the injection chamber 5, and a sample solvent bottle 16 is connected inside the placement frame 9 via a slight shaking component. An autosampler 13 is installed inside the injection chamber 5 located above the placement frame 9. A chromatographic column 10 is connected inside the column oven 6. The upper surface of the placement frame 9... The internal placement chamber has evenly spaced placement slots 91, and the slight shaking assembly includes a placement cavity 15 installed inside the placement slot 91. The sample solvent bottle 16 is placed in the placement cavity 15 with a concave-convex fit. Control slots 92 are opened in the placement frames 9 on both the front and rear sides of the placement slot 91. The control slots 92 are set at an angle and the space inside the control slots 92 is connected to the space inside the placement slots 91. Guide rollers 152 are installed on both the front and rear sides of the placement cavity 15, and the outer ends of the guide rollers 152 are inserted into the control slots 92. A row of second magnet blocks 151 is installed on the left side of the placement cavity 15. A support plate is fixed above the autosampler 13. 12. An electric push rod 11 is installed above the support plate 12. The upper part of the electric push rod 11 is connected to a slide rail assembly installed on the inner wall of the sample injection chamber 5. The slide rail assembly is used to control the horizontal movement of the electric push rod 11 and the autosampler 13. A vertical rod 14 is fixed to the lower left side of the support plate 12, and a first magnet block 141 is fixed to the lower right side of the vertical rod 14. The lower part of the vertical rod 14 is inserted into the placement frame 9. A second magnet block 151 is provided to the right side of the first magnet block 141. The first magnet block 141 and the second magnet block 151 have the same magnetic poles. A guide rod 26 is installed in a slot on the right side of the placement cavity 15. Furthermore, a manual telescopic rod 17 is fixed inside the right side of the placement slot 91, and a return spring 18 is nested and connected to the outside of the manual telescopic rod 17. A guide rod 26 is slidably connected through the left end of the manual telescopic rod 17. A six-way valve 8 is installed inside the right side of the injection box 5. The right side of the autosampler 13 is connected to the left side of the six-way valve 8 through a pipe. The bottom end of the six-way valve 8 is connected to one end of the chromatographic column 10 through a pipe. The other end of the chromatographic column 10 is connected to the detector in the detection box 7 through a pipe. A waste liquid discharge pipe 19 is installed on one side of the detection box 7, and the left end of the waste liquid discharge pipe 19 penetrates the left side of the detection box 7.

[0021] In use, turn on the power switch on the biological analysis device. The controller inside the device starts the pump in the high-pressure pump box 4. The mobile phase solution is first delivered to the vacuum degassing box 3 through the delivery tube to remove air bubbles from the mobile phase solution, thus avoiding affecting the accuracy of subsequent detection. Then, the pump delivers the mobile phase solution in the mobile phase solvent bottle 2 to the six-way valve 8. At the same time, the electric push rod 11 moves the autosampler 13 downward, allowing the autosampler 13 to deliver the sample solution in the corresponding sample solvent bottle 16 below to the six-way valve 8. The sample solution and mobile phase solution are then mixed and delivered to the chromatographic column 10 through the six-way valve 8 for separation. Subsequently, the solution flows into the detection chamber 7, where it is detected by the detector. After the detection is completed, the data center converts the electrical signal into specific numerical values ​​for analysis by the testing personnel. The wastewater, after testing, is discharged from the wastewater discharge pipe 19. Therefore, the biological analysis device of the liquid chromatograph can analyze the metabolites of fish and crustaceans, allowing for the study of changes in amino acids, sugars, lipids, and other metabolic products within fish and crustaceans. This facilitates the assessment of physiological state, environmental stress, or nutritional status. It can also detect the residual amounts of antibiotics, hormones, or environmental pollutants in aquatic products and analyze wastewater generated during fish and crustacean farming to determine whether it meets direct discharge standards. This helps prevent the direct discharge of substandard wastewater and avoids water pollution problems, enabling effective control and treatment of water pollution. Therefore, the biological analysis device of the liquid chromatograph can provide basic data for aquaculture, resource assessment, and ecological protection. This part is existing technology and will not be described in detail here.

[0022] The upper part of the electric push rod 11 is connected to the slide rail assembly installed on the inner wall of the sample injection chamber 5. The slide rail assembly is used to control the horizontal movement of the electric push rod 11 and the autosampler 13. Since the slide rail assembly is existing technology, it will not be described in detail here, nor is it shown in detail in the figure.

[0023] When the output end of the electric push rod 11 moves the support plate 12 and the autosampler 13 downward to prepare to aspirate the sample solution, the support plate 12 moves the vertical rod 14 downward together. When the lower end of the vertical rod 14 is inserted into the placement slot 91, the first magnet 141 on the right side of the lower end of the vertical rod 14 will sequentially correspond to and not correspond to multiple second magnets 151. When the first magnet 141 corresponds to the second magnet 151, the first magnet 141 and the second magnet 151 with the same magnetic pole will generate a repulsive force, causing the second magnet 151 to move downward. The placement cavity 15 moves slightly to the right. At this time, the right side of the placement cavity 15 presses against the manual telescopic rod 17, causing the return spring 18 to store force. The placement cavity 15 then moves the sample solvent bottle 16 inside slightly to the right. As the placement cavity 15 moves to the right, the guide rollers 152 on both sides slide within the control groove 92. Because the control groove 92 is inclined, the guide rollers 152 move slightly upward as they slide to the right within the control groove 92. This causes the guide rollers 152 to move the placement cavity 15 slightly upward. At this time, the guide rod 26 is on the left side of the manual telescopic rod 17. Similarly, when the first magnet 141 moves downwards and separates from the second magnet 151, the stored force of the return spring 18 will drive the manual telescopic rod 17 to reset. This causes the left end of the manual telescopic rod 17 to push the placement cavity 15 to the left, while the placement cavity 15 moves downwards to reset. Therefore, the placement cavity 15 and the sample solvent bottle 16 slightly sway left and right, and slightly sway up and down. This multi-directional slight swaying improves the mixing efficiency and effect of the sample solution in the sample solvent bottle 16, avoiding... The solvent-free sample vial 16, when left to stand for an extended period, causes particles to settle to the bottom and stratify, resulting in a uniform concentration of the sample solution drawn by the autosampler 13. This improves the accuracy of the biological analysis results and does not affect the biological analysis of fish and crustaceans. Furthermore, since the sample solution may contain dissolved gases during storage or pretreatment, gentle mixing helps microbubbles aggregate and rise to the surface, preventing them from being drawn into the autosampler 13 and causing inaccurate injection volumes. This further enhances the accuracy of the test results.

[0024] When the first magnet 141 separates from the lowermost second magnet 151, the placement cavity 15 and the sample solvent bottle 16 return to their original positions. Then, the autosampler 13 continues to move downwards and inserts into the sample solvent bottle 16 to draw up the sample solution. Therefore, it does not affect the use of the sample solvent bottle 16. Through the above structural design, while the autosampler 13 moves downwards to prepare to draw up the sample solution, the sample solvent bottle 16 also simultaneously undergoes slight shaking in multiple directions. During the slight shaking of the sample solvent bottle 16, the autosampler 13 continues to move downwards, causing the distance between the autosampler 13 and the corresponding sample solvent bottle 16 below to gradually decrease. Since it is not necessary to stop the operation of the autosampler 13 before slightly shaking the sample solvent bottle 16, the time spent by the autosampler 13 in drawing up the sample solution is not prolonged. This further improves the efficiency of the autosampler 13 in drawing up the sample solution, thereby further improving the detection efficiency of the biological analysis device. Moreover, it does not require an additional power source to slightly shake the sample solvent bottle 16, saving energy.

[0025] Example 2: The fish and crustacean biological analysis device in this example, based on Example 1, automatically lifts the delivery tube above the mobile phase solvent bottle 2 by means of the support rod 22, preventing bending at the connection between the delivery tube and the mobile phase solvent bottle 2 that would affect the infusion operation. See attached diagram for the specific structure. Figures 10-11 As shown, the upper interior of the placement rack 1 has a receiving groove 23 for placing the mobile phase solvent bottle 2. The receiving groove 23 is slidably connected to a support plate 24, and the bottom surface of the support plate 24 is connected to the bottom surface of the receiving groove 23 through a connecting spring 25. The right side of the support plate 24 is connected to one end of a connecting rope 201. Two rotating rods 20 are symmetrically rotated on the upper surface of the placement rack 1. The outer end of the rotating rod 20 is nested with a spiral spring 202, and the other end of the connecting rope 201 is wound around the outer side of the rotating rod 20. A support rod 21 is fixed through the middle outer side of the rotating rod 20. At the same time, a support rod 22 is fixed at the end of the support rod 21 away from the rotating rod 20. The support rod 22 and the support rod 21 form a "T" shaped structure.

[0026] When the mobile phase solvent bottle 2 is placed into the receiving tank 23, its own weight presses the support plate 24 downwards. The slider on the left side of the support plate 24 slides downwards in the groove within the placement frame 1. The connecting spring 25 stores force, causing the support plate 24 to move downwards while pulling one end of the connecting rope 201. This causes the other end of the connecting rope 201 to rotate the rotating rod 20 and the support rod 21, allowing the support rod 21 to rotate the support rod 22, thus raising the height of the support rod 22. At this time, the spiral spring 202 stores force... The rear support rod 22 lifts the delivery tube above the mobile phase solvent bottle 2 upwards to prevent bending at the connection between the delivery tube and the mobile phase solvent bottle 2, which would affect the infusion operation. After use, the mobile phase solvent bottle 2 is removed from the receiving tank 23. At this time, the stored force of the connecting spring 25 automatically drives the support plate 24 to move upwards and reset, and the stored force of the spiral spring 202 automatically drives the rotating rod 20 to rotate in the opposite direction and reset, so that the rotating rod 20 drives the support rod 21 to rotate horizontally, so that the support rod 21 and the support rod 22 rotate and are stored in the slot opened above the placement rack 1. Figure 12 As shown, this completes a series of tasks.

[0027] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A biological analysis device for fish and crustaceans, comprising a rack (1) and a mobile phase solvent bottle (2) placed inside the rack (1), wherein a vacuum degassing chamber (3) is connected below the rack (1), and a high-pressure pump box (4) is connected below the vacuum degassing chamber (3), characterized in that: The high-pressure pump box (4) is connected to the injection box (5) below, and the column oven (6) is installed below the injection box (5). The detection box (7) is connected below the column oven (6). The left side of the injection box (5) is slidably connected to the placement frame (9). The inside of the placement frame (9) is connected to the sample solvent bottle (16) through a slight shaking component. An autosampler (13) is installed in the injection box (5) above the placement frame (9). The inside of the column oven (6) is connected to the chromatographic column (10).

2. The biological analysis device for fish and crustaceans according to claim 1, characterized in that: The upper surface of the placement frame (9) is provided with placement slots (91) at equal intervals, and the slight shaking component includes a placement cavity (15) installed inside the placement slot (91). The sample solvent bottle (16) is placed inside the placement cavity (15) with a concave-convex fit. The placement frame (9) located on both sides of the placement slot (91) is provided with control slots (92), and the control slots (92) are set at an inclination. The space inside the control slots (92) is connected to the space inside the placement slots (91).

3. The biological analysis device for fish and crustaceans according to claim 2, characterized in that: Guide rollers (152) are installed on both the front and rear sides of the placement cavity (15), and the outer ends of the guide rollers (152) are inserted into the control groove (92). A row of second magnet blocks (151) is installed on the left side of the placement cavity (15).

4. The biological analysis device for fish and crustaceans according to claim 3, characterized in that: A support plate (12) is fixed above the autosampler (13), and an electric push rod (11) is installed above the support plate (12). The upper part of the electric push rod (11) is connected to a slide rail assembly installed on the inner wall of the sample box (5). The slide rail assembly is used to control the electric push rod (11) and the autosampler (13) to move horizontally.

5. The biological analysis device for fish and crustaceans according to claim 4, characterized in that: A vertical rod (14) is fixed to the lower left side of the support plate (12), and a first magnet block (141) is fixed to the lower right side of the vertical rod (14). The lower part of the vertical rod (14) is inserted into the placement frame (9), and a second magnet block (151) is provided to the right side of the first magnet block (141). The first magnet block (141) and the second magnet block (151) are magnetic poles of the same name.

6. The biological analysis device for fish and crustaceans according to claim 2, characterized in that: The right side of the placement cavity (15) is slotted and a guide rod (26) is installed. A manual telescopic rod (17) is fixed inside the right side of the placement groove (91). A reset spring (18) is nested on the outside of the manual telescopic rod (17). The guide rod (26) is slidably connected through the left end of the manual telescopic rod (17).

7. The biological analysis device for fish and crustaceans according to claim 1, characterized in that: A six-way valve (8) is installed inside the right side of the injection box (5). The right side of the autosampler (13) is connected to the left side of the six-way valve (8) through a pipe. The bottom end of the six-way valve (8) is connected to one end of the chromatographic column (10) through a pipe. The other end of the chromatographic column (10) is connected to the detector in the detection box (7) through a pipe. A waste liquid discharge pipe (19) is installed on one side of the detection box (7). The left end of the waste liquid discharge pipe (19) penetrates the left side of the detection box (7).

8. The biological analysis device for fish and crustaceans according to claim 1, characterized in that: The upper interior of the placement rack (1) is provided with a receiving groove (23) for placing the mobile phase solvent bottle (2).

9. The biological analysis device for fish and crustaceans according to claim 8, characterized in that: The receiving groove (23) is internally engaged and slidably connected to a support plate (24), and the bottom surface of the support plate (24) is connected to the bottom surface of the receiving groove (23) via a connecting spring (25). Furthermore, one end of a connecting rope (201) is connected to the right side of the support plate (24).

10. The biological analysis device for fish and crustaceans according to claim 9, characterized in that: Two rotating rods (20) are symmetrically rotated on the upper surface of the placement rack (1). The outer end of the rotating rod (20) is nested with a spiral spring (202). The other end of the connecting rope (201) is wrapped around the outer side of the rotating rod (20). A support rod (21) is fixed through the middle outer side of the rotating rod (20). At the same time, a support rod (22) is fixed at the end of the support rod (21) away from the rotating rod (20). The support rod (22) and the support rod (21) together form a "T" shaped structure.

Images