An automated pesticide residue rapid screening mass spectrometer and pesticide residue detection system

Abstract

The application discloses a kind of automatic pesticide residue rapid screening mass spectrometer and pesticide residue detection system, it is related to mass spectrometer technical field.The mass spectrometer includes frame, mechanical arm sampling device installed on frame, fluid sampling device and ionization cavity device, mechanical arm sampling device includes three-dimensional movement mechanism and sampling needle, fluid sampling device includes injection mechanism and communication pipeline, one end of communication pipeline is communicated with injection mechanism, another end of communication pipeline is communicated with sampling needle, ionization cavity device includes ionization cavity, ion source, Teflon film and conveying mechanism, ion source is communicated with ionization cavity, Teflon film is arranged in ionization cavity by conveying mechanism and can be driven by conveying mechanism to leave ionization cavity, ionization cavity is provided with sample addition port, and sample needle can drop the sample obtained by sample addition port to Teflon film in ionization cavity.The conveying mechanism of the application replaces the manual insertion of slide into ionization cavity for detection, improves efficiency and labor cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mass spectrometer, in particular to an automatic pesticide residue rapid screening mass spectrometer and a pesticide residue detection system. BACKGROUND

[0002] The development of agricultural industrialization makes the production of agricultural products more and more dependent on exogenous substances such as pesticides, antibiotics and hormones. The use amount of pesticides in China is high, and the unreasonable use of these substances will lead to excessive pesticide residues in agricultural products, affecting the safety of consumers, and in severe cases, causing consumers to be ill, develop abnormally, and even directly lead to poisoning and death. Excessive pesticide residues will also affect the trade of agricultural products. Countries around the world attach great importance to pesticide residues and have set more and more strict limit standards for pesticide residues in various agricultural and sideline products, making China's agricultural product exports face severe challenges.

[0003] At present, the instrument used for detecting pesticide residues in agricultural products is mainly mass spectrometer. However, when the ionization cavity device in the mass spectrometer detects, the slide needs to be inserted into the ionization cavity device for liquid dropping, and then artificial liquid dropping is needed for detection, which is low in efficiency, high in cost and easy to cause pollution. Meanwhile, the ionization cavity is inconvenient to disassemble, causing the ion source to be easily blocked.

[0004] In view of this, the present application is proposed. SUMMARY

[0005] The present application aims to provide an automatic pesticide residue rapid screening mass spectrometer and a pesticide residue detection system.

[0006] The present application is implemented as follows:

[0007] In the first aspect, the present application provides an automatic pesticide residue rapid screening mass spectrometer, which comprises a frame, a mechanical arm sampling device, a fluid sampling device and an ionization cavity device, wherein the mechanical arm sampling device, the fluid sampling device and the ionization cavity device are all installed on the frame,

[0008] The mechanical arm sampling device comprises a three-dimensional motion mechanism and a sampling needle,

[0009] The fluid sampling device comprises an injection mechanism and a communication pipeline, one end of the communication pipeline communicates with the injection mechanism, and the other end of the communication pipeline communicates with the sampling needle,

[0010] The ionization cavity device comprises an ionization cavity, an ion source, a Teflon film and a conveying mechanism, the ion source is in communication with the ionization cavity, the Teflon film is arranged in the ionization cavity through the conveying mechanism and can be driven by the conveying mechanism to leave the ionization cavity, the ionization cavity is provided with a sample adding port, and the sample needle can add the sample obtained through the sample adding port to the Teflon film in the ionization cavity.

[0011] In an optional embodiment, the conveying mechanism comprises an output wheel, a recovery wheel and a conveying motor, one end of the Teflon film is wound on the output wheel, the other end is wound on the recovery wheel, the output wheel and the recovery wheel are in transmission connection, and the conveying motor is in transmission connection with the output wheel to drive the Teflon film to move.

[0012] In an optional embodiment, the ionization cavity device is further provided with a quick release nut for connecting with a mass spectrometer;

[0013] Preferably, the ionization cavity device is further provided with a capillary for introducing gas into the ionization cavity;

[0014] Preferably, the ionization cavity device is further provided with an observation window for observing the ionization cavity.

[0015] In an optional embodiment, the three-dimensional movement mechanism comprises an X-axis movement assembly, a Y-axis movement assembly, a Z-axis movement assembly and a motor assembly for driving the X-axis movement assembly, the Y-axis movement assembly and the Z-axis movement assembly to move respectively, the Y-axis movement assembly is slidably mounted on the X-axis movement assembly, the Z-axis movement assembly is slidably mounted on the Y-axis movement assembly, and the sample needle is slidably mounted on the Z-axis movement assembly;

[0016] Preferably, at least one of the X-axis movement assembly, the Y-axis movement assembly and the Z-axis movement assembly is provided with a magnetic grating ruler for controlling the stroke of the motor assembly.

[0017] In an optional embodiment, the injection mechanism comprises a syringe, a pull rod, an injection mounting frame and an injection driving assembly, the syringe is fixed on the injection mounting frame, the pull rod is slidably connected to the inside of the syringe through the injection driving assembly, and one end of the communication pipeline is in communication with the pull rod;

[0018] The injection driving assembly comprises an injection motor, an injection rotating shaft, an injection guide rail, an injection sliding block and an injection nut, the injection motor and the injection guide rail are both mounted on the injection mounting frame, the injection rotating shaft is in transmission connection with the injection motor, the injection nut is in fixed connection with the injection sliding block, the injection rotating shaft is in rotational connection with the injection mounting frame through the injection nut and the injection sliding block, the injection sliding block is in slidable connection with the injection guide rail, and the injection sliding block is connected with the pull rod.

[0019] In an optional embodiment, the automatic pesticide residue rapid screening mass spectrometer further comprises a reagent cavity and a cover for shielding the reagent cavity, and the cover is rotatably connected with the frame.

[0020] In an optional embodiment, the automatic pesticide residue rapid screening mass spectrometer further comprises a lifting cover device for driving the cover to open and close, and the lifting cover device comprises an electric push rod, a cover support seat, a push rod sliding block and a push rod guide rail, the cover support seat is mounted on at least one side of the cover, the electric push rod and the push rod guide rail are both fixedly connected with the frame, the free end of the electric push rod is fixedly connected with the push rod sliding block, the push rod sliding block is slidably mounted on the push rod guide rail through the electric push rod, and the push rod sliding block is in rotational connection with the cover support seat to drive the cover to open and close.

[0021] In an optional embodiment, the automatic pesticide residue rapid screening mass spectrometer is further provided with a plurality of photoelectric sensors and control systems for respectively controlling the start of corresponding motors or electric push rods in the mechanical arm sampling device, the fluid sampling device and the lifting cover device, and the control systems are in signal connection with the photoelectric sensors.

[0022] In an optional embodiment, the automatic pesticide residue rapid screening mass spectrometer further comprises a mass analyzer device, and the inlet of the mass analyzer is in communication with the outlet of the ionization cavity device.

[0023] In a second aspect, the present application provides a pesticide residue detection system comprising the automatic pesticide residue rapid screening mass spectrometer according to any one of the preceding embodiments.

[0024] The present application has the following beneficial effects:

[0025] The automatic pesticide residue rapid screening mass spectrometer provided by the application can realize more accurate control through the mechanical arm sampling device and the fluid sampling device, the fluid sampling device can also be separated for use by other devices, and the cooperation mode of the conveying mechanism and the Teflon film in the ionization cavity device can realize the conveying of the Teflon film with the to-be-tested agent dropped into the ionization cavity for ionization, the conveying mechanism pulls out the Teflon film after detection from the ionization cavity, so that the Teflon film is clean and not contaminated each time the Teflon film is sampled. Meanwhile, the recovery wheel disc can be replaced after reaching a certain degree of recovery, and the conveying mechanism in the application replaces manual insertion of the slide into the ionization cavity for detection, thereby improving efficiency and labor cost. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0027] Figure 1 The structure schematic diagram of the automatic pesticide residue rapid screening mass spectrometer provided by the embodiment of the application in the first perspective view;

[0028] Figure 2 The structure schematic diagram of the automatic pesticide residue rapid screening mass spectrometer provided by the embodiment of the application in the second perspective view;

[0029] Figure 3 The structure schematic diagram of the mechanical arm sampling device of the automatic pesticide residue rapid screening mass spectrometer provided by the embodiment of the application;

[0030] Figure 4 The structure schematic diagram of the fluid sampling device of the automatic pesticide residue rapid screening mass spectrometer provided by the embodiment of the application;

[0031] Figure 5 The structure schematic diagram of the ionization cavity device of the automatic pesticide residue rapid screening mass spectrometer provided by the embodiment of the application in the first perspective view;

[0032] Figure 6 The structure schematic diagram of the ionization cavity device of the automatic pesticide residue rapid screening mass spectrometer provided by the embodiment of the application in the second perspective view;

[0033] Figure 7 The structure schematic diagram of the lifting cover device of the automatic pesticide residue rapid screening mass spectrometer provided by the embodiment of the application.

[0034] Figure legend: 100-automatic pesticide residue rapid screening mass spectrometer;

[0035] 110-frame; 111-cable tray;

[0036] 120-robotic arm sample feeding device; 121-three-dimensional movement mechanism; 122-sampling needle; 123-X-axis movement assembly; 124-Y-axis movement assembly; 1241-synchronous wheel; 1242-synchronous belt; 1243-synchronous sliding block; 125-Z-axis movement assembly; 1251-screw; 1252-nut; 1253-screw sliding block; 126-motor assembly; 127-three-dimensional guide rail; 128-three-dimensional photoelectric sensor; 129-magnetic grating ruler;

[0037] 130-fluid sample feeding device; 131-injection mechanism; 133-syringe; 134-pull rod; 135-injection mounting bracket; 136-injection driving assembly; 1361-injection motor; 1362-injection rotating shaft; 1363-injection guide rail; 1364-injection sliding block; 1365-injection nut; 137-injection photoelectric sensor;

[0038] 140-ionization cavity device; 141-ionization cavity; 1411-sample inlet; 1412-capillary; 1413-observation window; 142-ion source; 143-PTFE film; 144-conveying mechanism; 1441-output wheel; 1442-recovery wheel; 1443-conveying motor; 145-quick-release nut;

[0039] 150-lifting cover device; 151-cover; 152-electric push rod; 153-cover support seat; 154-push rod sliding block; 155-push rod guide rail; 156-push rod photoelectric sensor; 157-push rod fixing seat; 158-guide rail fixing seat;

[0040] 160-control system;

[0041] 170-suction head box;

[0042] 180-sampling kit. DETAILED DESCRIPTION

[0043] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0044] Therefore, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the application claimed, but merely represents selected embodiments of the application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the application without creative efforts fall within the scope of the application.

[0045] It should be noted that similar reference numbers and letters refer to similar items in the following drawings, and therefore, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

[0046] In the description of the application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed, and are merely for the convenience of describing the application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0047] In addition, the terms "horizontal", "vertical" and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that it is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0048] In the description of the application, it should also be noted that unless otherwise explicitly specified and limited, the terms "provided", "mounted", "connected", "linked" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrally connected; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication between two elements inside. For those of ordinary skill in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0049] In order to make the purpose, technical scheme and advantages of the embodiments of the application more clear, the technical scheme of the embodiments of the application will be described clearly and completely below. If specific conditions are not specified in the embodiments, they are carried out according to conventional conditions or manufacturer's recommended conditions. If the reagents or instruments used are not specified by the manufacturer, they are all conventional products that can be purchased on the market.

[0050] First embodiment

[0051] Please refer to Figure 1 andFigure 2 The present application provides an automatic pesticide residue rapid screening mass spectrometer 100, which comprises a frame 110, a mechanical arm sample inlet device 120, a fluid sample inlet device 130, an ionization cavity device 140, a lifting cover device 150 and a control system 160.

[0052] (1) Frame 110

[0053] The frame 110 is the overall support and mounting structure of the automatic pesticide residue rapid screening mass spectrometer 100, and the mechanical arm sample inlet device 120, the fluid sample inlet device 130, the ionization cavity device 140 and the lifting cover device 150 are all mounted on the frame 110. In this application, the frame 110 is formed by bending and welding sheet metal, and is divided into a circuit board mounting area, a circuit connection arrangement area and a mass spectrometer mounting area. The frame 110 is internally provided with a wire slot 111 and a riveted nut 1252, and the circuit board and other devices are mounted in the designated area. The wires are arranged according to the wire slot 111 and pass through the connecting holes to connect to other components. In this application, the overall arrangement of the circuit board and power lines is neat and easy to maintain and disassemble through the arrangement of the frame 110 and the wire slot 111, which improves the existing situation of disordered circuit board arrangement and difficult maintenance. At the same time, the wires are protected in the wire slot 111, which can avoid short circuit or other accidents caused by contact with metal substances.

[0054] (2) Mechanical arm sample inlet device 120

[0055] Please refer to Figure 3 The mechanical arm sample inlet device 120 comprises a three-dimensional motion mechanism 121 and a sampling needle 122. The three-dimensional motion mechanism 121 comprises an X-axis motion assembly 123, a Y-axis motion assembly 124, a Z-axis motion assembly 125 and a motor assembly 126 for driving the X-axis motion assembly 123, the Y-axis motion assembly 124 and the Z-axis motion assembly 125 to move, respectively. The X-axis motion assembly 123 mainly carries the Y-axis motion assembly 124 and the Z-axis motion assembly 125, specifically, the Y-axis motion assembly 124 is slidably mounted on the X-axis motion assembly 123, the Z-axis motion assembly 125 is slidably mounted on the Y-axis motion assembly 124, and the sampling needle 122 is slidably mounted on the Z-axis motion assembly 125. In this application, the three-dimensional motion mechanism 121 drives the sampling needle 122 to move in three dimensions, thereby reaching the desired position.

[0056] The sliding installation mode can be various, including but not limited to slide rail slider, screw 1251 nut 1252, synchronous wheel 1241 and synchronous belt 1242 structure. In the embodiment, the X-axis movement assembly 123 adopts synchronous wheel 1241, synchronous belt 1242 and slider installed on the synchronous belt 1242 to realize the sliding of the Y-axis movement assembly 124, the synchronous belt 1242 is wound on two synchronous belts 1242, the motor assembly 126 drives the synchronous wheel 1241 to rotate, and then drives the synchronous belt 1242 to move, the slider installed on the synchronous belt 1242 moves, and then drives the Y-axis movement assembly 124 to move as a whole.

[0057] The Y-axis movement assembly 124 also adopts synchronous wheel 1241, synchronous belt 1242 and synchronous slider 1243 installed on the synchronous belt 1242 to realize the sliding of the Z-axis movement assembly 125, the Z-axis movement assembly 125 is installed on the synchronous slider 1243 of the Y-axis movement assembly 124, and the Z-axis movement assembly 125 moves as a whole through the movement of the synchronous slider 1243.

[0058] The Z-axis movement assembly 125 adopts the cooperation of the screw 1251 and the nut 1252 to realize the up-down movement of the sampling needle 122. Specifically, the Z-axis movement assembly 125 includes the screw 1251, the nut 1252 and the screw slider 1253, the motor assembly 126 drives the screw 1251 to rotate, the nut 1252 is installed on the screw 1251 and can move on the screw 1251 with the rotation of the screw 1251, the screw slider 1253 is connected with the nut 1252 and moves with the movement of the nut 1252, and the sampling needle 122 is connected with the screw slider 1253 through a linear bearing.

[0059] It should be understood that on the X-axis movement assembly 123, the Y-axis movement assembly 124 and the Z-axis movement assembly 125, in order to ensure the stable operation of the Y-axis movement assembly 124, the Z-axis movement assembly 125 and the sampling needle 122, and at the same time reduce the stress of the synchronous belt 1242 and the nut 1252, in the present application, three-dimensional guide rails 127 can also be installed on the X-axis movement assembly 123, and the Y-axis movement assembly 124 and the Z-axis movement assembly 125, the synchronous slider 1243 or the screw slider 1253 is slidably connected to the three-dimensional guide rail 127, which can ensure the stable operation of the slider.

[0060] In addition, in order to realize automatic control, the X-axis movement assembly 123, the Y-axis movement assembly 124 and the Z-axis movement assembly 125 are each provided with a three-dimensional photoelectric sensor 128 and a magnetic grating ruler 129, wherein the three-dimensional photoelectric sensor 128 can drive the corresponding motor of the X-axis movement assembly 123, the Y-axis movement assembly 124 and the Z-axis movement assembly 125 to move upon receiving an instruction of the control system 160, and the magnetic grating ruler 129 is arranged to control the stroke of the motor assembly 126, so as to ensure the accuracy of the motor operation and reach the specified position.

[0061] The sampling needle 122 in the application can be moved above the disposable suction nozzle head box 170, and the sampling needle 122 is inserted into the suction nozzle head by controlling the downward movement, and then transferred to the sampling reagent box 180.

[0062] (3) Fluid sampling device 130

[0063] Please refer to Figure 4 The fluid sampling device 130 includes an injection mechanism 131 and a communication pipeline (not shown in the figure), one end of the communication pipeline is in communication with the injection mechanism 131, and the other end of the communication pipeline is in communication with the sampling needle 122. In the application, the suction nozzle head can sample the reagent in the sampling reagent box 180 through the communication pipeline.

[0064] Specifically, the injection mechanism 131 includes a syringe 133, a pull rod 134, an injection mounting frame 135 and an injection driving assembly 136, the syringe 133 is fixed on the injection mounting frame 135, the pull rod 134 is slidably connected to the inside of the syringe 133 through the injection driving assembly 136, and one end of the communication pipeline is in communication with the pull rod 134; the injection driving assembly 136 includes an injection motor 1361, an injection shaft 1362, an injection guide rail 1363, an injection sliding block 1364 and an injection nut 1365, the injection motor 1361 and the injection guide rail 1363 are both mounted on the injection mounting frame 135, the injection shaft 1362 is in transmission connection with the injection motor 1361, the injection nut 1365 is fixedly connected with the injection sliding block 1364, the injection shaft 1362 is rotatably connected to the injection mounting frame 135 through the injection nut 1365 and the injection sliding block 1364, the injection sliding block 1364 is slidably connected to the injection guide rail 1363, and the injection sliding block 1364 is connected with the pull rod 134. The injection driving assembly 136 is provided with an injection photoelectric sensor 137 for controlling the opening and closing of the injection motor 1361.

[0065] The principle of atmospheric pressure of the syringe 133 is utilized in the present application. The reagent in the sampling kit 180 enters the suction head by upward movement of the pull rod 134 of the syringe 133. Then the sampling needle 122 with the suction head is moved to the sample inlet 1411 of the ionization cavity device 140 by the three-dimensional movement mechanism 121. The sample in the suction head is discharged by downward movement of the pull rod 134.

[0066] (4) Ionization cavity device 140

[0067] Please refer to Figure 5 and Figure 6 The ionization cavity device 140 is used for ionizing the sample to be tested, and the ionized sample is introduced into the mass spectrometer for detection. In the present application, the ionization cavity device 140 includes an ionization cavity 141, an ion source 142, a Teflon film 143, and a conveying mechanism 144. The ion source 142 is in communication with the ionization cavity 141. The Teflon film 143 is arranged in the ionization cavity 141 by the conveying mechanism 144 and can be driven by the conveying mechanism 144 to leave the ionization cavity 141. The ionization cavity 141 is provided with a sample inlet 1411, a capillary 1412, and an observation window 1413. The sampling needle 122 can add the obtained sample to the Teflon film 143 in the ionization cavity 141 through the sample inlet 1411. The capillary 1412 is in communication with the ionization cavity 141 and is used for introducing gas into the ionization cavity 141. The gas can guide the ionized sample into the mass spectrometer. The observation window 1413 is used for observing the ionization in the ionization cavity 141, so as to facilitate real-time understanding of the ionization.

[0068] The conveying mechanism 144 includes an output disc 1441, a recovery disc 1442, and a conveying motor 1443. One end of the Teflon film 143 is wound on the output disc 1441, and the other end is wound on the recovery disc 1442. The output disc 1441 and the recovery disc 1442 are in driving connection. The conveying motor 1443 is in driving connection with the output disc 1441 to drive the Teflon film 143 to move. A conveying photoelectric sensor (not shown) is arranged on the conveying mechanism 144 to control the start and stop of the conveying motor 1443.

[0069] In the present application, the movement of the Teflon film 143 can be realized by the conveying mechanism 144. At the same time, the sample is directly dropped on the Teflon film 143. When the Teflon film 143 moves to the ionization cavity 141, the sample on the Teflon film 143 can be directly ionized. After detection is completed, the recovery disc 1442 is controlled by the conveying motor 1443 to rotate to pull out the Teflon film 143 after detection from the ionization cavity 141, so as to ensure that the Teflon film 143 is clean and not contaminated each time. At the same time, the recovery disc 1442 can be replaced after reaching a certain degree. The conveying mechanism 144 in the present application replaces manual insertion of the glass slide into the ionization cavity 141 for detection, thereby improving the efficiency and labor cost.

[0070] In addition, the ionization cavity device 140 of the present application is further provided with a quick-release nut 145, and the ionization cavity 141 is connected with the mass spectrometer through the quick-release nut 145, so that the sample after ionization can be directly introduced into the mass spectrometer for detection.

[0071] (5) Lifting cover device 150

[0072] Please refer to Figure 7 The lifting cover device 150 is used to shield or open the reagent cavity, so that the sampling needle 122 can sample when it is opened, and the reagent liquid can be automatically shielded after sampling to avoid dust in the air from causing pollution to the reagent liquid.

[0073] The lifting cover device 150 in the present application comprises a cover 151, an electric push rod 152, a cover support seat 153, a push rod sliding block 154 and a push rod guide rail 155. The cover 151 is rotatably connected with the frame 110. The cover support seat 153 is installed on at least one side of the cover 151. The electric push rod 152 and the push rod guide rail 155 are both fixedly connected to the frame 110. The electric push rod 152 is fixed to the frame 110 through a push rod fixing seat 157, and the push rod guide rail 155 is fixed to the frame 110 through a guide rail fixing seat 158. The free end of the electric push rod 152 is fixedly connected with the push rod sliding block 154. The push rod sliding block 154 is slidably installed in the push rod guide rail 155 through the electric push rod 152. The push rod sliding block 154 is rotatably connected with the cover support seat 153 to drive the cover 151 to open and close.

[0074] The electric push rod 152 is provided with a push rod photoelectric sensor 156 for controlling the opening and closing thereof.

[0075] (6) Control system 160

[0076] Please refer to Figure 1 The control system 160 is independently connected with a plurality of photoelectric sensor signals, so that the control system 160 can independently control the start of the corresponding motor or electric push rod 152 in the mechanical arm sampling device 120, the fluid sampling device 130, the ionization cavity device 140 and the lifting cover device 150, to realize fully automated operation.

[0077] In addition, the automatic pesticide residue rapid screening mass spectrometer 100 provided by the present application further comprises a mass analyzer device (such as a mass spectrometer), and the inlet of the mass analyzer is in communication with the outlet of the ionization cavity device 140.

[0078] The working principle of the automatic pesticide residue rapid screening mass spectrometer 100 provided in the application is as follows: in the application, the frame 110 is used to realize the installation of the mechanical arm sample inlet device 120, the fluid sample inlet device 130, the ionization cavity device 140, the lifting cover device 150 and the control system 160, so that the overall layout is neat and easy to maintain and disassemble. The sampling needle 122 in the mechanical arm sample inlet device 120 moves to the specified position (above the disposable suction nozzle head box 170) with the three-dimensional motion mechanism 121, the sampling needle 122 moves downward to insert the suction nozzle head, and then is transferred to the sampling reagent box 180. Since the sampling needle 122 is in communication with the connecting channel in the fluid sample inlet device 130, the injection mechanism 131 moves upward through the pull rod 134, so that the atmospheric pressure in the communication channel is reduced, and the reagent in the sampling reagent box 180 enters the suction nozzle head to complete sampling. When the sampling needle 122 is sampling, the electric push rod 152 in the lifting cover device 150 controls the cover 151 to open, and the sampling needle 122 is used. After sampling is completed, the electric push rod 152 controls the cover 151 to close, which can effectively avoid the dust in the air from causing pollution to the reagent liquid. When the reagent in the reagent box is used up, the reagent box can be manually replaced. Then, the sampling needle 122 with the suction nozzle head is moved to the sample inlet 1411 of the ionization cavity device 140 by the three-dimensional motion mechanism 121, and the Teflon film 143 is transported into the ionization cavity 141 by the conveying mechanism 144. At this time, the sample in the suction nozzle head is delivered onto the Teflon film 143, and the Teflon film 143 enters the ionization cavity 141 and contacts the ion source 142 to perform ionization. After ionization is completed, the gas entering from the capillary 1412 is discharged into the mass spectrometer for detection. After detection is completed, the recovery wheel disc 1442 is controlled to rotate by the conveying motor 1443 to pull out the Teflon film 143 that has completed detection from the ionization cavity 141, so that the Teflon film 143 is clean and not contaminated each time. Meanwhile, the recovery wheel disc 1442 can be replaced when it reaches a certain degree. The conveying mechanism 144 in the application replaces manual insertion of the glass sheet into the ionization cavity 141 for detection, which improves efficiency and labor cost.

[0079] In addition, the application also provides a pesticide residue detection system, which comprises the automatic pesticide residue rapid screening mass spectrometer 100.

[0080] To sum up, the automatic pesticide residue rapid screening mass spectrometer 100 provided by the application can realize more accurate control through the mechanical arm sample inlet device 120 and the fluid sample inlet device 130, the fluid sample inlet device 130 can also be split for use by other devices, the transmission mechanism 144 and the Teflon film 143 in the ionization cavity device 140 can realize the cooperation mode that the Teflon film 143 with the agent to be tested is dropped into the ionization cavity 141 for ionization, the transmission mechanism 144 pulls out the Teflon film 143 after detection from the ionization cavity 141, and it is guaranteed that the Teflon film 143 is clean and not contaminated each time the sample is dropped. Meanwhile, the recovery wheel disc 1442 can be replaced after reaching a certain degree, and the transmission mechanism 144 in the application replaces manual insertion of the slide into the ionization cavity 141 for detection, thereby improving the efficiency and labor cost.

[0081] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An automated pesticide residue rapid screening mass spectrometer, characterized in that, It comprises a frame, a mechanical arm sampling device, a fluid sampling device and an ionization cavity device, the mechanical arm sampling device, the fluid sampling device and the ionization cavity device are all mounted on the frame, The mechanical arm sampling device comprises a three-dimensional movement mechanism and a sampling needle, The fluid sampling device comprises an injection mechanism and a communication pipeline, one end of the communication pipeline communicates with the injection mechanism, and the other end of the communication pipeline communicates with the sampling needle, The ionization cavity device comprises an ionization cavity, an ion source, a Teflon film and a conveying mechanism, the ion source communicates with the ionization cavity, the Teflon film is arranged in the ionization cavity through the conveying mechanism and can be driven by the conveying mechanism to leave the ionization cavity, the ionization cavity is provided with a sample adding port, and the sampling needle can add the sample obtained by sampling to the Teflon film in the ionization cavity through the sample adding port; The injection mechanism comprises a syringe, a pull rod, an injection mounting rack and an injection drive assembly, the syringe is fixed on the injection mounting rack, the pull rod is slidably connected to the inside of the syringe through the injection drive assembly, and one end of the communication pipeline communicates with the pull rod; The injection drive assembly comprises an injection motor, an injection shaft, an injection guide rail, an injection sliding block and an injection nut, the injection motor and the injection guide rail are both mounted on the injection mounting rack, the injection shaft is in transmission connection with the injection motor, the injection nut is in fixed connection with the injection sliding block, the injection shaft is in rotational connection with the injection mounting rack through the injection nut and the injection sliding block, the injection sliding block is slidably connected to the injection guide rail, and the injection sliding block is connected with the pull rod; The sampling needle moves above a disposable suction nozzle head box, inserts the suction nozzle head by controlling the sampling needle to move downward, is transferred to a sampling reagent box, the reagent in the sampling reagent box enters the suction nozzle head by moving the pull rod of the injection upward, the sampling needle with the suction nozzle head is moved to the sample adding port of the ionization cavity device through the three-dimensional movement mechanism, and the sample in the suction nozzle head is discharged by moving the pull rod downward.

2. The automated pesticide residue rapid screening mass spectrometer according to claim 1, wherein, The conveying mechanism comprises an output disc, a recovery disc and a conveying motor, one end of the Teflon film is wound on the output disc, the other end is wound on the recovery disc, the output disc and the recovery disc are in transmission connection, and the conveying motor is in transmission connection with the output disc to drive the Teflon film to move.

3. The automated pesticide residue rapid screening mass spectrometer of claim 1, wherein, The ionization cavity device is further provided with a quick release nut for connecting with a mass spectrometer.

4. The automated pesticide residue rapid screening mass spectrometer of claim 1, wherein, The ionization cavity device is further provided with a capillary for introducing gas into the ionization cavity.

5. The automated pesticide residue rapid screening mass spectrometer of claim 1, wherein, The ionization cavity device is further provided with an observation window for observing the ionization cavity. The ionization cavity device is further provided with an observation window for observing the ionization cavity.

6. The automated pesticide residue rapid screening mass spectrometer of claim 1, wherein, The three-dimensional movement mechanism comprises an X-axis movement assembly, a Y-axis movement assembly, a Z-axis movement assembly, and a motor assembly for driving the X-axis movement assembly, the Y-axis movement assembly and the Z-axis movement assembly to move, the Y-axis movement assembly is slidably mounted on the X-axis movement assembly, the Z-axis movement assembly is slidably mounted on the Y-axis movement assembly, and the sampling needle is slidably mounted on the Z-axis movement assembly.

7. The automated pesticide residue rapid screening mass spectrometer of claim 6, wherein, At least one of the X-axis movement assembly, the Y-axis movement assembly and the Z-axis movement assembly is provided with a magnetic scale for controlling the stroke of the motor assembly.

8. The automated pesticide residue rapid screening mass spectrometer of claim 1, wherein, The automatic pesticide residue rapid screening mass spectrometer further comprises a reagent cavity and a cover for shielding the reagent cavity, and the cover is rotatably connected to the frame.

9. The automated pesticide residue rapid screening mass spectrometer of claim 8, wherein, The automatic pesticide residue rapid screening mass spectrometer further comprises a lifting cover device for driving the cover to open and close, the lifting cover device comprises an electric push rod, a cover support seat, a push rod sliding block and a push rod guide rail, the cover support seat is mounted on at least one side of the cover, the electric push rod and the push rod guide rail are fixedly connected to the frame, the free end of the electric push rod is fixedly connected to the push rod sliding block, the push rod sliding block is slidably mounted on the push rod guide rail through the electric push rod, and the push rod sliding block is rotatably connected to the cover support seat to drive the cover to open and close.

10. The automated pesticide residue rapid screening mass spectrometer of claim 9, wherein, The automatic pesticide residue rapid screening mass spectrometer is further provided with a plurality of photoelectric sensors and control systems for respectively controlling the start of corresponding motors or electric push rods in the mechanical arm sampling device, the fluid sampling device and the lifting cover device, and the control systems are signal-connected to the photoelectric sensors.

11. The automated pesticide residue rapid screening mass spectrometer of claim 9, wherein, The automatic pesticide residue rapid screening mass spectrometer further comprises a mass analyzer device, and an inlet of the mass analyzer is in communication with an outlet of the ionization cavity device.

12. A pesticide residue detection system characterized by comprising: The automatic pesticide residue rapid screening mass spectrometer comprises the automatic pesticide residue rapid screening mass spectrometer according to any one of claims 1-11. The automatic pesticide residue rapid screening mass spectrometer comprises the automatic pesticide residue rapid screening mass spectrometer according to any one of claims 1-11.

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