Nitrogen blowing concentration device and sample processing system

Abstract

The present invention relates to a nitrogen blowing concentration device and a sample processing system. The nitrogen blowing concentration device includes: an air circuit control module for connecting to an air source; a fixed frame for assembling to an automatic sampler, the fixed frame being provided with a parking position and a sample position; and a nitrogen blowing head, the nitrogen blowing head being connected to the air circuit control module, the nitrogen blowing head having a first state of being placed in the parking position, and a second state of cooperating with a sample container on the sample position, the nitrogen blowing head being able to be picked up and transferred by a mechanical arm of the automatic sampler to switch between the first state and the second state, and in the second state, the air circuit control module being able to control the nitrogen blowing head to blow gas into the sample container according to a preset program. The nitrogen blowing concentration device of this scheme can be used in conjunction with an automatic sampler to complete automated sample pre-processing and subsequent automatic sampling and analysis, and can realize an online nitrogen blowing concentration function.

Description

Technical Field

[0001] The invention relates to the technical field of nitrogen blowing concentration, in particular to a nitrogen blowing concentration device and a sample processing system. Background Art

[0002] Nitrogen blowing is referred to as nitrogen blowing. It is to blow nitrogen quickly, continuously and controllably to the surface of the heated sample through nitrogen blowing instruments, automatic rapid concentrators and other equipment, so that the water in the sample to be processed can be quickly evaporated and separated, thereby achieving oxygen-free concentration of the sample, while maintaining the purity of the sample, so as to achieve the effect of rapid separation and purification. Nitrogen blowing operation plays an important role in the sample pretreatment process, and is mainly used in sample pretreatment in drug screening, hormone analysis, liquid phase, gas phase and mass spectrometry analysis.

[0003] However, traditional nitrogen blowing concentration devices are mostly offline processing with single functions and cannot be used in conjunction with other equipment to complete sample automated pre-treatment and subsequent automated sampling and analysis operations, and therefore cannot realize online nitrogen blowing concentration function. Summary of the invention

[0004] Based on this, it is necessary to provide a nitrogen blowing concentration device and a sample processing system to address the above problems. The nitrogen blowing concentration device can be used in conjunction with an automatic sampler to complete automated sample pretreatment and subsequent automatic sampling and analysis, and can realize online nitrogen blowing concentration function.

[0005] A nitrogen blowing concentration device, comprising:

[0006] Gas circuit control module, used for connecting with gas source;

[0007] A fixing frame, the fixing frame is used to be assembled on the automatic sample injector, and the fixing frame is provided with a parking position and a sample position; and

[0008] A nitrogen blowing head, wherein the nitrogen blowing head is connected to the gas circuit control module, and the nitrogen blowing head has a first state of being placed in the parking position, and a second state of cooperating with the sample container on the sample position. The nitrogen blowing head can be picked up and transferred by the robotic arm of the automatic sampler to switch between the first state and the second state. In the second state, the gas circuit control module can control the nitrogen blowing head to blow gas into the sample container according to a preset program.

[0009] The above-mentioned nitrogen blowing and concentrating device is installed on the automatic sampler through a fixed frame, and a sample position and a parking position are set on the fixed frame so that the nitrogen blowing head can be transferred and parked with the cooperation of the mechanical arm of the automatic sampler. In this way, by combining the nitrogen blowing and concentrating device with the automatic sampler, the sample automation pre-treatment and subsequent automatic sampling and analysis can be completed, and the online nitrogen blowing and concentrating function can be realized. Specifically, when nitrogen blowing and concentrating, the mechanical arm transfers the nitrogen blowing head to the sample container, and the gas circuit control module connects the nitrogen according to the instruction, and then the nitrogen blowing head can be blown into the sample container to realize nitrogen blowing and concentrating. After the nitrogen blowing is completed, the gas circuit control module controls the nitrogen to stop conveying, and the mechanical arm can remove the nitrogen blowing head on the sample container and transfer it to the parking position for parking. Then the mechanical arm can automatically sample the sample in the sample container for on-machine analysis or perform the next processing operation.

[0010] In one embodiment, the nitrogen blowing head includes a sleeve with an open bottom, an air inlet needle arranged in the sleeve, and a picking portion arranged on the top of the sleeve, the sleeve is used to be sleeved on the top of the sample container, the air inlet needle is connected to the delivery pipeline of the air circuit control module to blow gas into the sample container, and the picking portion is used for the robotic arm of the automatic sampler to pick up or release.

[0011] In one embodiment, the nitrogen blowing head further includes a gas outlet needle disposed in the sleeve, and the gas outlet needle is connected to a recovery pipeline of the gas circuit control module to recover the gas in the sample container.

[0012] In one embodiment, the nitrogen blowing head also includes a push rod disposed in the sleeve and movable up and down, the top of the picking portion is provided with a through hole corresponding to the push rod, and the mechanical arm of the automatic sampler is provided with a pushing portion cooperating with the push rod, and the push rod can abut and cooperate with the septum on the sample container under the action of the pushing portion to drive the sleeve portion to move upward until the air inlet needle and the air outlet needle are pulled out of the septum.

[0013] In one embodiment, the fixed frame includes a connecting frame, a sample rack connected to the connecting frame, and a parking rack connected to the connecting frame, the sample rack is provided with a sample slot, the parking frame is provided with a parking slot, the sample slot and the parking slot respectively form the sample position and the parking position, and the connecting frame is provided with a mounting portion for assembly with the automatic sampler.

[0014] In one embodiment, the mounting portion is a snap-fit ​​structure for snap-fitting with the automatic sample injector.

[0015] In one embodiment, the sample holder is provided with a heating component for heating the sample in the sample container; and / or the sample holder is provided with a vibrating component for oscillating the sample in the sample container.

[0016] In one embodiment, two parking racks are provided, and the two parking racks are respectively located on two opposite sides of the sample rack.

[0017] In one embodiment, the sample rack is provided with at least two sample slots, and the parking rack is provided with at least two parking slots.

[0018] The present application also proposes a sample processing system, comprising a controller, an automatic sample injector and the nitrogen blowing and concentrating device as described above, wherein the controller is used to realize the joint control between the automatic sample injector and the nitrogen blowing and concentrating device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 A schematic diagram of a nitrogen blowing device according to an embodiment of the present invention;

[0022] Figure 2 It is a partial structural schematic diagram of a nitrogen blowing device according to an embodiment.

[0023] 10. Gas path control module; 11. Air inlet; 12. Exhaust port; 20. Fixing frame; 21. Connecting frame; 211. Mounting part; 22. Sample rack; 221. Sample slot; 23. Parking rack; 231. Parking slot; 30. Nitrogen blowing head; 31. Sleeve; 32. Air inlet needle; 33. Picking part; 34. Air outlet needle; 35. Push rod; 40. Sample container. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0025] The present invention proposes a sample processing system, which includes a controller, an automatic sampler and a nitrogen blowing concentration device, and the controller is used to realize the joint control between the automatic sampler and the nitrogen blowing concentration device. Specifically, the automatic sampler generally includes a fixed beam extending laterally, and a mechanical arm that can move laterally along the fixed beam. The mechanical arm can be a multi-dimensional mechanical arm, which can realize multi-dimensional free movement. Through the mechanical arm, a series of operations such as material grabbing and automatic sampling can be realized. The nitrogen blowing concentration device is mainly used to realize nitrogen blowing concentration of samples so that the samples can be quickly separated and purified. When in use, the controller can be software-programmed according to the sample processing steps. The controller can control the automatic sampler and the nitrogen blowing concentration device to be used in conjunction through a preset program, and the transfer of the nitrogen blowing head 30 during the nitrogen blowing operation is performed through the mechanical arm of the automatic sampler. After the nitrogen blowing is completed, the sample in the sample bottle is sampled by the mechanical arm for on-machine analysis or transferred to other processing modules of the sample processing system for the next step of processing operation. In this way, the online nitrogen blowing concentration function can be realized to improve the processing efficiency of the sample.

[0026] See also Figure 1 , Figure 1 A schematic diagram of a nitrogen blowing concentration device in an embodiment of the present invention is shown. The nitrogen blowing concentration device provided in an embodiment of the present invention includes a gas circuit control module 10, a fixing frame 20 and a nitrogen blowing head 30. The gas circuit control module 10 is used to connect with a gas source; the fixing frame 20 is used to be assembled on an automatic sampler, and the fixing frame 20 is provided with a parking position and a sample position; the nitrogen blowing head 30 is connected to the gas circuit control module 10, and the nitrogen blowing head 30 has a first state of being placed in the parking position, and a second state of cooperating with a sample container 40 on the sample position. The nitrogen blowing head 30 can be picked up and transferred by the robot arm of the automatic sampler to switch between the first state and the second state. In the second state, the gas circuit control module 10 can control the nitrogen blowing head 30 to blow gas into the sample container 40 according to a preset program.

[0027] Specifically, the gas circuit control module 10 can be connected between the gas source (such as a nitrogen bottle) and the nitrogen blowing head 30 through a pipeline, and the gas circuit control module 10 can control the supply of nitrogen according to a preset program. The fixed frame 20 is used to assemble the nitrogen blowing concentration device as a whole onto the three-dimensional automatic sampler platform. The parking position on the fixed frame 20 can be used to place the nitrogen blowing head 30; the sample position on the fixed frame 20 can be used to place the sample container 40 and provide a place for nitrogen blowing concentration, and the sample container 40 can be specifically a sample bottle or a test tube. When not working or after the nitrogen blowing concentration is completed, the robot arm can move the nitrogen blowing head 30 to the parking position for standby. When the nitrogen blowing operation is required, the robot arm can pick up the nitrogen blowing head 30 at the parking position and transfer it to the sample container 40, so that the nitrogen blowing head 30 is connected to the inside of the sample container 40. The number of parking positions and sample positions can be set according to actual needs, and generally multiple positions can be set, so as to increase the number of samples processed per batch and improve the sample processing efficiency.

[0028] The above-mentioned nitrogen blowing concentration device is installed on the automatic sampler through the fixed frame 20, and the sample position and the parking position are set on the fixed frame 20, so that the nitrogen blowing head 30 can be transferred and parked with the cooperation of the mechanical arm of the automatic sampler. In this way, by combining the nitrogen blowing concentration device with the automatic sampler, the sample automation pre-treatment and subsequent automatic sampling analysis can be completed, and the online nitrogen blowing concentration function can be realized. Specifically, when nitrogen blowing concentration is performed, the mechanical arm transfers the nitrogen blowing head 30 to the sample container 40, and the gas circuit control module 10 connects the nitrogen according to the instruction, and then the nitrogen blowing head 30 can be blown into the sample container 40 to achieve nitrogen blowing concentration. After the nitrogen blowing is completed, the gas circuit control module 10 controls the nitrogen to stop conveying, and the mechanical arm can remove the nitrogen blowing head 30 on the sample container 40 and transfer it to the parking position for parking. Then the mechanical arm can automatically sample the sample in the sample container 40 for on-machine analysis or perform the next step of processing operation.

[0029] Furthermore, in this embodiment, the nitrogen blowing head 30 includes a sleeve 31 with an open bottom, an air inlet needle 32 arranged in the sleeve 31, and a picking portion 33 arranged on the top of the sleeve 31. The sleeve 31 is used to be sleeved on the top of the sample container 40. The air inlet needle 32 is connected to the delivery pipeline of the gas circuit control module 10 to blow gas into the sample container 40. The picking portion 33 is used for the robotic arm of the automatic sampler to pick up or release.

[0030] Specifically, the shape and size of the sleeve 31 are adapted to the sample container 40 so as to be sleeved on the top of the sample container 40. For example, in the present embodiment, the sample container 40 adopts a sample bottle, and the sleeve 31 is a cylindrical shape adapted to the sample bottle. The picking portion 33 is adapted to the gripper of the robot arm so as to facilitate the robot arm to grasp and transfer. For example, in the present embodiment, the picking portion 33 is an adapter rod extending vertically. The side of the sleeve 31 is also provided with an interface for connecting the air inlet needle 32 to the delivery pipeline of the gas circuit control module 10. When performing the nitrogen blowing operation, the robot arm grabs the picking portion 33 of the nitrogen blowing head 30 and transfers it until the sleeve 31 of the nitrogen blowing head 30 is completely sleeved on the top of the sample bottle, and the air inlet needle 32 can be extended into the sample bottle. After the nitrogen is connected, the sample in the sample bottle can be purged with nitrogen through the air inlet needle 32.

[0031] Furthermore, in the present embodiment, the nitrogen blowing head 30 also includes an air outlet needle 34 disposed in the sleeve 31, and the air outlet needle 34 is connected to the recovery pipe of the gas circuit control module 10 to recover the gas in the sample container 40. During the nitrogen blowing process, the waste gas in the sample container 40 can be discharged through the air outlet needle 34 for recovery. The nitrogen blowing head 30 of the present embodiment adopts a double-needle structure design, so that the gas circulation can be realized and the nitrogen blowing efficiency can be improved. At the same time, the waste gas generated can be recovered to avoid direct discharge into the atmosphere and cause pollution. For example, Figure 1 As shown, the gas circuit control module 10 is provided with an air inlet 11 and an exhaust port 12. The air inlet 11 can be connected to the gas source, and the exhaust port can be connected to the recovery device. The nitrogen supplied by the gas source can be sequentially delivered to the sample container 40 through the air inlet 11, the gas circuit control module 10, the delivery pipeline and the air inlet needle 32 for nitrogen purge; the exhaust gas generated during the nitrogen purge can be sequentially delivered to the recovery device through the air outlet needle 34, the recovery pipeline, the gas circuit control module 10 and the exhaust port 12 for recovery.

[0032] In addition, for the sample container 40, such as a sample bottle, a septum is usually provided at the mouth of the bottle to prevent the sample from volatilizing or spilling. The septum is generally made of a soft elastic material, such as a rubber pad or a silicone pad, and the air inlet needle 32 and the air outlet needle 34 can penetrate the septum and extend into the sample bottle. However, due to the friction between the septum and the air inlet needle 32 and the air outlet needle 34, it is difficult to remove the nitrogen blowing head 30 from the sample container 40. In order to more conveniently separate the nitrogen blowing head 30 from the sample container 40 when the nitrogen blowing is completed, further, in the present embodiment, the nitrogen blowing head 30 also includes a push rod 35 disposed in the sleeve 31 and capable of moving up and down, a through hole corresponding to the push rod 35 is disposed at the top of the picking portion 33, and the mechanical arm of the automatic sampler is provided with a push portion cooperating with the push rod 35, and the push rod 35 can abut against the septum on the sample container 40 under the action of the push portion to drive the sleeve 31 to move upward until the air inlet needle 32 and the air outlet needle 34 are withdrawn from the septum. In this way, after the nitrogen blowing is completed, the mechanical arm grabs the picking portion 33, and at the same time, the push portion of the mechanical arm can be inserted from the through hole and push the push rod 35 downward, and the push rod 35 abuts against the septum, and then the sleeve 31 can be pushed upward, so that the nitrogen blowing head 30 is separated from the sample container 40, and the operation is simple and convenient, and the sample container 40 can be prevented from being lifted together with the nitrogen blowing head 30.

[0033] For further information, please refer to Figure 2 On the basis of the above embodiment, the fixed frame 20 includes a connecting frame 21, a sample frame 22 connected to the connecting frame 21, and a parking frame 23 connected to the connecting frame 21, the sample frame 22 is provided with a sample slot 221, the parking frame 23 is provided with a parking slot 231, the sample slot 221 and the parking slot 231 respectively form a sample position and a parking position, and the connecting frame 21 is provided with a mounting portion 211 for assembling with an automatic sampler. Specifically, the fixed frame 20 can be made of stainless steel or engineering plastics with high structural strength. Optionally, the surface of the fixed frame 20 can be coated with an anti-corrosion layer to avoid corrosion during sample processing. The fixed frame 20 is assembled and connected with the automatic sampler through the mounting portion 211. For example, in this embodiment, the connecting frame 21 is generally L-shaped, the sample frame 22 and the parking frame 23 are both arranged on the bottom support plate of the connecting frame 21, and the mounting portion 211 is arranged on the top surface of the vertical support plate of the connecting frame 21. In order to ensure assembly reliability, optionally, two vertical support plates are provided at intervals, and a mounting portion 211 is provided on the top surface of each vertical support plate.

[0034] The assembly method between the mounting portion 211 and the automatic sampler includes, but is not limited to, snap-fit ​​connection, fastener connection, magnetic fit, etc., as long as the stable assembly between the two can be ensured. For example, in this embodiment, the mounting portion 211 is a snap-fit ​​structure for snap-fitting with the automatic sampler. The snap-fit ​​structure is used to facilitate the disassembly and assembly between the nitrogen blowing concentration device and the automatic sampler, so that the nitrogen blowing concentration device can be easily assembled on different automatic samplers.

[0035] Further, in this embodiment, the sample rack 22 is provided with a heating component for heating the sample in the sample container 40; and / or, the sample rack 22 is provided with a vibrating component for oscillating the sample in the sample container 40. The heating component includes but is not limited to heating the sample by electric heating, electromagnetic heating or infrared heating; the vibrating component includes but is not limited to oscillating the sample by mechanical shaking, ultrasonic vibration and the like. Optionally, the sample rack 22 is provided with both a heating component and a vibrating component, and during the nitrogen blowing concentration process, the heating and oscillation functions of the sample can be realized simultaneously, thereby effectively improving the nitrogen blowing concentration efficiency.

[0036] Furthermore, if Figure 2 As shown, in this embodiment, two parking racks 23 are provided, and the two parking racks 23 are respectively located on opposite sides of the sample rack 22. The parking racks 23 are arranged on both sides of the sample rack 22 to avoid the cross winding of the nitrogen pipeline during the movement of the nitrogen blowing head 30.

[0037] In addition, the sample slot 221 is used to place the sample container 40 (such as a sample bottle or a test tube), and the specification of the sample slot 221 can be designed according to the size and shape of the sample container 40. The parking slot 231 is used to place the nitrogen blowing head 30, and the specification of the parking slot 231 can be designed according to the size and shape of the nitrogen blowing head 30. In order to increase the processing capacity of each batch of samples, the sample rack 22 is optionally provided with at least two sample slots 221, and the parking rack 23 is provided with at least two parking slots 231. For example, in this embodiment, if Figure 2 As shown, two parking racks 23 are respectively provided on opposite sides of the sample rack 22, and six sample slots 221 are provided on the sample rack 22, and the six sample slots 221 are arranged in two rows and three columns, and three parking slots 231 are provided on each parking rack 23, and the parking slots 231 are arranged one-to-one with the sample slots 221 on the adjacent side. Of course, in other embodiments, other numbers of sample slots 221 and parking slots 231 can also be designed according to actual needs. In addition, in actual applications, sample slots 221 of different specifications can also be set on the same sample rack 22 to meet the placement of sample containers 40 of different specifications, and accordingly, parking slots 231 of different specifications can be set on the parking rack 23 to meet the placement of nitrogen blow heads 30 of different specifications.

[0038] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims. In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0040] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0041] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0043] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

Claims

1. A nitrogen blowing concentration device, characterized in that: include: Gas circuit control module, used for connecting with gas source; A fixing frame, the fixing frame is used to be assembled on the automatic sample injector, and the fixing frame is provided with a parking position and a sample position; as well as A nitrogen blowing head, the nitrogen blowing head is connected to the gas circuit control module, the nitrogen blowing head has a first state of being placed in the parking position, and a second state of cooperating with the sample container on the sample position, the nitrogen blowing head can be picked up and transferred by the mechanical arm of the automatic sampler to switch between the first state and the second state, and in the second state, the gas circuit control module can control the nitrogen blowing head to blow gas into the sample container according to a preset program; The nitrogen blowing head comprises a sleeve with an open bottom, an air inlet needle and an air outlet needle arranged in the sleeve, a picking portion arranged at the top of the sleeve, and a push rod arranged in the sleeve and capable of moving up and down, the sleeve is used to be sleeved on the top of the sample container, the air inlet needle is connected to the delivery pipeline of the gas path control module to blow gas into the sample container, the air outlet needle is connected to the recovery pipeline of the gas path control module to recover the gas in the sample container, the picking portion is used for the mechanical arm of the automatic sampler to pick up or release, the top of the picking portion is provided with a through hole corresponding to the push rod, the mechanical arm of the automatic sampler is provided with a pushing portion cooperating with the push rod, and the push rod can be abutted and cooperated with the septum on the sample container under the action of the pushing portion to drive the sleeve portion to move upward until the air inlet needle and the air outlet needle are withdrawn from the septum; The mounting portion is a buckle structure for engaging with the automatic sampler, and the sample holder is provided with a heating component for heating the sample in the sample container; and / or the sample holder is provided with a vibration component for oscillating the sample in the sample container; The fixing frame includes a connecting frame, a sample frame connected to the connecting frame, and a parking frame connected to the connecting frame. The sample frame is provided with a sample slot, and the parking frame is provided with a parking slot. The sample slot and the parking slot form the sample position and the parking position respectively. The connecting frame is provided with a mounting portion for assembling with the automatic sampler.

2. The nitrogen blowing concentration device according to claim 1, characterized in that: There are two parking racks, which are respectively located on two opposite sides of the sample rack.

3. The nitrogen blowing concentration device according to claim 1, characterized in that: The sample rack is provided with at least two sample slots, and the parking rack is provided with at least two parking slots.

4. A sample processing system, characterized in that: It comprises a controller, an automatic sample injector and a nitrogen blowing concentration device as claimed in any one of claims 1 to 3, wherein the controller is used to realize the joint control between the automatic sample injector and the nitrogen blowing concentration device.

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