Rapid pesticide residue screening equipment

Abstract

The utility model discloses rapid pesticide residue screening equipment, which relates to the technical field of boiler pesticide screening, and comprises a test board, a plurality of storage boxes are arranged at the top of the test board, paper-based chip bodies are arranged in inner cavities of the storage boxes, a spectrum analyzer is arranged at the top of the test board, and the paper-based chip bodies are arranged in the inner cavities of the storage boxes. A smearing assembly is arranged at the top of the test table, the smearing assembly comprises a fixing table fixedly connected with the top of the test table, and a fixing plate is fixedly connected with the top of the fixing table. According to the technical scheme, through the arrangement of the smearing assembly, the purpose of uniformly smearing the surfaces of fruits and vegetables can be effectively achieved, and therefore the situation that manual operation of a user is needed is completely avoided. The smearing assembly not only improves the working efficiency, but also ensures that a pesticide solution is uniformly distributed on the surfaces of fruits and vegetables, and lays a foundation for subsequent accurate screening. In addition, the design of the assembly takes fruits and vegetables of different shapes and sizes into consideration, and the assembly can meet diversified sample treatment requirements.

Description

Technical Field

[0001] This utility model belongs to the field of pesticide screening technology, and in particular relates to a rapid pesticide residue screening device. Background Technology

[0002] Pesticide residues, containing highly toxic substances, often remain directly or indirectly in vegetables, fruits, soil, and water. Studies have shown that high levels of pesticide residues in fruits and vegetables can cause adverse effects such as food poisoning, cell carcinogenesis, and fetal malformations, posing significant harm to the environment and human health. Therefore, rapid detection of pesticide residues has attracted widespread attention from researchers. Traditional methods for pesticide residue detection include high-performance liquid chromatography (HPLC), gas chromatography (GC), gas chromatography-mass spectrometry (GC-MS), and enzyme-linked immunosorbent assay (ELISA). Surface-enhanced Raman scattering (SERS) technology, as a trace analysis technique, can rapidly provide characteristic fingerprint information of molecules and is non-destructive to samples, making SERS technology a promising application in pesticide residue detection.

[0003] Existing rapid pesticide residue screening equipment has certain limitations in practical applications, mainly in the preparation work before screening fruit and vegetable samples. Specifically, before screening, pesticide solution needs to be manually applied to the surface of the fruits and vegetables, and then manually shaken to ensure that the pesticide is evenly distributed on the surface, thereby ensuring the accuracy of subsequent test results. However, this operation method is inefficient, causing users to focus on processing only one fruit or vegetable sample at a time, making it impossible to process multiple samples simultaneously or conduct multi-sample comparison experiments. This not only increases working time but also limits the overall efficiency and flexibility of the screening work, making it inconvenient to use. Utility Model Content

[0004] The purpose of this invention is to provide a rapid pesticide residue screening device to solve the problems mentioned in the background art, which require manual application of pesticides and manual shaking before screening. This method is inefficient, limits the user to only one sample at a time, increases working time, and is inconvenient to operate.

[0005] To achieve the above objectives, the specific technical solution of this utility model is as follows: A rapid pesticide residue screening device includes a test platform, a plurality of storage boxes are placed on the top of the test platform, a paper-based chip body is placed in the inner cavity of the storage box, a spectrometer is installed on the top of the test platform, and a coating assembly is provided on the top of the test platform. The coating assembly includes a fixing platform fixedly connected to the top of the test platform, and a fixing plate is fixedly connected to the top of the fixing platform.

[0006] Preferably, a motor is installed on the rear side of the fixing plate, and the output shaft of the motor is fixedly connected to a connecting rod, with the front end of the connecting rod extending to the outer side of the front side of the fixing plate.

[0007] Preferably, a rotating disk is fixedly connected to the front end of the connecting rod, and a toothed disk is fixedly connected to the outer surface of the front side of the fixing plate.

[0008] Preferably, a long rod is rotatably connected to the rear side of the gear disk, and a gear that meshes with the gear disk is fixedly connected to the top end of the long rod.

[0009] Preferably, a positioning plate is fixedly connected to the front side of the rotating disk, and the bottom of the positioning plate extends through to the rotating rod.

[0010] Preferably, the outer surfaces of the rotating rod and the long rod are respectively connected to pulleys, and the two pulleys are connected by belt drive.

[0011] Preferably, the top end of the rotating rod is movably connected to a placement plate, and the top of the placement plate has an inner placement groove.

[0012] Preferably, a limiting plate is fixedly connected to the outer surface of the front side of the rotating disk, and a screw is provided through the inner cavity of the limiting plate.

[0013] Preferably, the bottom end of the screw is rotatably connected to a guide disk, and the outer surface of the guide disk is slidably connected to the front side of the rotating disk.

[0014] Preferably, a placement container and a sealing cap are respectively provided on the opposite side of the guide plate and the placement plate.

[0015] The pesticide residue rapid screening device of this utility model has the following advantages:

[0016] This rapid pesticide residue screening device, through its coating component, effectively achieves uniform coating of pesticides onto the surface of fruits and vegetables, completely eliminating the need for manual operation. This coating component not only improves work efficiency but also ensures the uniform distribution of pesticide solution on the fruit and vegetable surfaces, laying the foundation for accurate subsequent screening. Furthermore, the component's design takes into account fruits and vegetables of different shapes and sizes, adapting to diverse sample processing needs and further enhancing the device's applicability and flexibility. It significantly reduces manual intervention and human error, greatly increases processing speed, and greatly promotes the efficient conduct of pesticide residue screening, while also being easy to use. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a three-dimensional schematic diagram of the overall structure of the coating component of this utility model;

[0020] Figure 3 This is a three-dimensional schematic diagram of the rotating disk structure of this utility model;

[0021] Figure 4 This is a side view of the long rod structure of this utility model;

[0022] Figure 5 This is a three-dimensional structural diagram of the rotating disk and the fixed plate of this utility model in a disassembled state.

[0023] Figure 6 This is a bottom-view perspective view of the rotating rod structure of this utility model;

[0024] Figure 7 This is a three-dimensional schematic diagram of the disassembled structure of the limiting plate and screw of this utility model.

[0025] Figure 8 This is a three-dimensional schematic diagram of the connecting rod structure of this utility model;

[0026] Figure 9 This is a three-dimensional structural diagram of the container and sealing cap of this utility model in their disassembled state.

[0027] The markings in the diagram are as follows: 1. Test platform; 2. Storage box; 3. Paper-based chip body; 4. Spectrometer; 5. Coating assembly; 51. Fixing platform; 52. Fixing plate; 53. Motor; 54. Connecting rod; 55. Rotary disk; 56. Gear disk; 57. Long rod; 58. Gear; 59. Positioning plate; 510. Rotating rod; 511. Pulley; 512. Placement tray; 513. Limiting plate; 514. Screw; 515. Guide disk; 516. Placement container; 517. Sealing cap. Detailed Implementation

[0028] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0029] In the description of the embodiments of this utility model, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0032] The following disclosure provides many different implementations or examples for different structures of the embodiments of the present invention. To simplify the disclosure of the embodiments of the present invention, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of the present invention; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0033] To better understand the purpose, structure, and function of this utility model, the following description, in conjunction with the accompanying drawings, provides a more detailed account of a rapid pesticide residue screening device of this utility model.

[0034] like Figures 1-9As shown, this utility model discloses a rapid pesticide residue screening device, including a test platform 1. Several storage boxes 2 are placed on top of the test platform 1. A paper-based chip body 3 is placed inside the storage box 2. The paper-based chip body 3 is a SERS paper-based chip, specifically a flexible and controllable AgNPs / GO paper-based chip manufactured using screen printing technology. By orderly printing graphene oxide (GO) and silver nanoparticles (AgNPs) onto cellulose paper and controlling the printing cycle, this SERS paper-based chip can be mass-produced. Simultaneously, the number of AgNPs printing layers can be controlled to obtain the optimal enhanced SERS chip.

[0035] Screen-printed SERS chips offer three advantages: First, the preparation method is novel, rapid, portable, and allows for mass production. Second, the surface morphology of the SERS substrate can be controlled by manipulating the printing cycle, providing material controllability. Third, Ag NPs / GO chips exhibit excellent SERS activity and ultrasensitive detection capabilities, with detection limits of 0.26 ng / cm², 28 ng / cm², and 7.4 ng / cm² for three pesticides: thiram, thiamethoxam, and methyl parathion, respectively. In practical detection and analysis, the paper substrate provides natural adsorption properties, while the π-π stacking effect and electrostatic interaction of graphene oxide with pesticide residue molecules allow for rapid extraction of pesticide residues from fruits and vegetables through a simple wiping method.

[0036] A spectrometer 4 is installed on the top of the test stand 1, and a coating assembly 5 is provided on the top of the test stand 1. The coating assembly 5 includes a fixed platform 51 that is fixedly connected to the top of the test stand 1. A fixed plate 52 is fixedly connected to the top of the fixed platform 51. A motor 53 is installed on the rear side of the fixed plate 52. A connecting rod 54 is fixedly connected to the output shaft of the motor 53. The front end of the connecting rod 54 extends to the outer side of the front of the fixed plate 52. The area of ​​the connecting rod 54 in contact with the fixed plate 52 is rotatably connected by a bearing. A rotating disk 55 is fixedly connected to the front end of the connecting rod 54. A gear disk 56 is fixedly connected to the outer surface of the front of the fixed plate 52. The connecting rod 54 extends to the outer side of the front of the gear disk 56. The area of ​​the connecting rod 54 in contact with the gear disk 56 is rotatably connected by a bearing. A long rod 57 is rotatably connected to the rear side of the gear disk 56. Several mounting plates are fixedly connected to the outer surface of the rear side of the rotating disk 55. The mounting plates are rotatably connected to the outer surface of the long rod 57 by a bearing. A gear 58 that meshes with the gear disk 56 is fixedly connected to the top end of the long rod 57. A positioning plate 59 is fixedly connected to the front side of the rotating disk 55.

[0037] like Figures 2-9As shown, the bottom of the positioning plate 59 extends through to the rotating rod 510. The outer surfaces of the rotating rod 510 and the long rod 57 are respectively connected to pulleys 511, and the two pulleys 511 are connected via belt drive. The top of the rotating rod 510 is movably connected to a placement plate 512, and the top of the placement plate 512 has an inner placement groove. A limiting plate 513 is fixedly connected to the outer surface of the front side of the rotating plate 55. A screw 514 is inserted through the inner cavity of the limiting plate 513. The inner cavity of the limiting plate 513 has an internal thread, while the outer surface of the screw 514 has a matching external thread. A handpiece for easy rotation by the user is fixedly connected to the top of the screw 514. The bottom end of the wheel and screw 514 is rotatably connected to a guide plate 515, and the outer surface of the guide plate 515 is slidably connected to the front side of the rotating plate 55. The guide plate 515 and the placement plate 512 are respectively provided with a placement tank 516 and a sealing cover 517 on opposite sides. The contact area between the placement tank 516 and the sealing cover 517 is connected by threads. The placement tank 516 and the sealing cover 517 are respectively in contact with the placement groove in the guide plate 515 and the bottom of the placement plate 512. The contact area between the placement tank 516 and the sealing cover 517 is respectively provided with matching sealing internal threads and sealing external threads, and the threads are waterproof and corrosion resistant.

[0038] Specifically, in preparation for pesticide screening of fruits and vegetables, one or more fruits and vegetables are first placed in the placement container 516, and pesticide solutions of different concentrations are added. Next, after manually tightening the sealing cap 517, the screw 514 is manually rotated, using its threaded transmission principle to press down the guide plate 515, thus securing the placement container 516. Then, the motor 53 is started, driving the connecting rod 54 to rotate, causing the rotating plate 55 to rotate synchronously, thereby driving the placement container 516 and the long rod 57 to rotate together, completing the initial shaking process. Simultaneously, the long rod 57 drives the gear 58 to mesh and rotate with the gear plate 56, causing the gear 58 to rotate and drive the pulley 511, further driving the rotating rod 510 and its placement plate 512 to rotate, ultimately achieving a secondary rotation of the placement container 516. This process ensures that the pesticide is evenly coated on the surface of the fruits and vegetables, facilitating subsequent pesticide screening.

[0039] The working principle of a rapid pesticide residue screening device is as follows: First, pesticide solutions of different concentrations are placed into the coating component 5, allowing the pesticides to be evenly applied to the surface of fruits and vegetables. Then, by selecting a 1cm × 1cm detection area on the fruit or vegetable, ethanol is dropped onto the paper-based chip body 3 to improve the surface wettability of the fruit or vegetable and achieve rapid adsorption of pesticide molecules. After wiping the paper-based chip body 3, it is placed in the detection area. After the paper strip dries, the paper-based chip body 3 is placed on a glass slide and screened with a spectrometer 4 to determine the agricultural residue values, facilitating screening.

[0040] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A rapid pesticide residue screening device, characterized by: The test platform (1) includes a test stand (1), a number of storage boxes (2) are placed on the top of the test stand (1), paper-based chip bodies (3) are placed in the inner cavity of the storage boxes (2), a spectrometer (4) is installed on the top of the test stand (1), and a coating assembly (5) is provided on the top of the test stand (1). The coating assembly (5) includes a fixing platform (51) fixedly connected to the top of the test stand (1), and a fixing plate (52) is fixedly connected to the top of the fixing platform (51).

2. The pesticide residue rapid screening device according to claim 1, characterized in that: A motor (53) is installed on the rear side of the fixing plate (52). The output shaft of the motor (53) is fixedly connected to a connecting rod (54), and the front end of the connecting rod (54) extends to the outer side of the front side of the fixing plate (52).

3. The rapid pesticide residue screening device according to claim 2, characterized in that: The front end of the connecting rod (54) is fixedly connected to a rotating disk (55), and the outer surface of the front side of the fixing plate (52) is fixedly connected to a toothed disk (56).

4. The pesticide residue rapid screening device according to claim 3, characterized in that: A long rod (57) is rotatably connected to the rear side of the toothed disc (56), and a gear (58) that meshes with the toothed disc (56) is fixedly connected to the top end of the long rod (57).

5. The pesticide residue rapid screening device according to claim 4, characterized in that: A positioning plate (59) is fixedly connected to the front side of the rotating disk (55), and the bottom of the positioning plate (59) extends through to the rotating rod (510).

6. The pesticide residue rapid screening device according to claim 5, characterized in that: The outer surfaces of the rotating rod (510) and the long rod (57) are respectively connected to pulleys (511), and the two pulleys (511) are connected by belt drive.

7. The rapid pesticide residue screening device according to claim 6, characterized in that: The top of the rotating rod (510) is movably connected to a placement plate (512), and a placement groove is provided inside the top of the placement plate (512).

8. The rapid pesticide residue screening device according to claim 7, characterized in that: A limiting plate (513) is fixedly connected to the outer surface of the front side of the rotating disk (55), and a screw (514) is provided through the inner cavity of the limiting plate (513).

9. The device of claim 8, wherein: The bottom end of the screw (514) is rotatably connected to a guide disk (515), and the outer surface of the guide disk (515) is slidably connected to the front side of the rotating disk (55).

10. The pesticide residue rapid screening device according to claim 9, characterized in that: The guide plate (515) and the placement plate (512) are respectively provided with a placement tank (516) and a sealing cap (517) on opposite sides.

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