CN218331388U - Pretreatment all-in-one machine for processing environmental air sample and liquid sample - Google Patents

Abstract

The utility model provides a processing environment air sample and liquid sample's pretreatment all-in-one, include: the system comprises a liquid sample injection assembly and an air sample injection assembly, wherein a carrier gas outlet of a gas chromatograph is sequentially communicated with a headspace six-way valve, an analytic six-way valve and a sample injection port of the gas chromatograph; the liquid sample injection assembly comprises a sample bottle, the sample bottle is connected with a headspace six-way valve, the headspace six-way valve is also communicated with a headspace sample injection channel, and a sealing assembly of the headspace six-way valve is adjusted to be communicated with a carrier gas outlet, the sample bottle and a sample injection port; the air sampling assembly comprises an analytic tube, the analytic tube is connected with an analytic six-way valve, the analytic six-way valve is also communicated with an analytic sampling channel, and a sealing assembly of the analytic six-way valve is adjusted to be communicated with a carrier gas outlet, the analytic tube and a sampling port. The problems of inconvenient operation and high cost in the prior art when a headspace sample injector and thermal desorption are used for analyzing the ambient air sample and the liquid sample are solved.

Description

Pretreatment all-in-one machine for processing environmental air sample and liquid sample

Technical Field

The utility model belongs to the technical field of environmental analysis, it relates to a processing environmental air sample and liquid sample's pretreatment all-in-one specifically to say so.

Background

The thermal desorption is called thermal desorption or thermal desorption in China, is a full-automatic pretreatment device of an ambient air sample, and is characterized in that a collected sample tube is placed into the thermal desorption, a sample pipeline is hermetically heated, and then a sample analyzed from the sample tube is introduced into a gas chromatograph for analysis through switching of a valve body.

The head space sample injector is a full-automatic pretreatment device for liquid samples in the environment, and is characterized in that the liquid samples are placed in a special sample bottle, the liquid samples in the sample bottle are heated, organic gas in the liquid samples can release volatile organic compounds at a certain temperature, a vapor-liquid balance state is realized, and then the samples released from the upper part of the sample bottle are introduced into a gas chromatograph for analysis through the switching of a valve body.

The thermal desorption and headspace sample injectors in the current market are independent devices, and have two conditions, namely, one gas chromatograph cannot use the headspace sample injector when in thermal desorption, the sample injection pipeline needs to be replaced for continuous use, the operation is complex, and the gas leakage cannot be used easily because of poor replacement; secondly, two kinds of equipment are connected to two gas chromatographs respectively, so that the cost is high and the occupied space is large.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a handle preceding processing all-in-one of ambient air sample and liquid sample, when having solved among the prior art and having used headspace sample injector and thermal desorption to carry out ambient air sample and liquid sample analysis, the problem of inconvenient, with high costs of operation.

The utility model provides a processing environment air sample and liquid sample's pretreatment all-in-one, include: the system comprises a liquid sample injection assembly and an air sample injection assembly, wherein a carrier gas outlet of a gas chromatograph is sequentially communicated with a headspace six-way valve, an analytic six-way valve and a sample injection port of the gas chromatograph; the liquid sample injection assembly comprises a sample bottle, the sample bottle is connected with a headspace six-way valve, the headspace six-way valve is also communicated with a headspace sample injection channel, and a sealing assembly of the headspace six-way valve is adjusted to be communicated with a carrier gas outlet, the sample bottle and a sample injection port; the air sampling assembly comprises an analytic tube, the analytic tube is connected with an analytic six-way valve, the analytic six-way valve is further communicated with an analytic sampling channel, a sealing assembly of the analytic six-way valve is adjusted, and the analytic six-way valve can be communicated with a carrier gas outlet, the analytic tube and a sampling port.

Preferably, the second interface of the headspace six-way valve is connected with the carrier gas outlet of the gas chromatograph, the first interface of the headspace six-way valve is connected with the second interface of the analytic six-way valve, and the first interface of the analytic six-way valve is connected with the sample inlet of the gas chromatograph.

Preferably, the liquid sample introduction assembly comprises a headspace sample tray, a headspace bottle motor and a headspace heating block, wherein sample bottles are arranged in the headspace sample tray, and the headspace bottle motor is used for driving the headspace heating block to be close to the sample bottles.

Preferably, the air sampling assembly comprises an analysis sample disc, an analysis motor and an analysis heating block, wherein the analysis sample disc is arranged below the headspace sample disc, an analysis tube is arranged in the analysis sample disc, and the analysis motor is used for driving the analysis heating block to be close to the analysis tube.

Preferably, the liquid sample introduction assembly further comprises a headspace sample introduction rod arranged below the headspace sample tray, a headspace sample introduction needle is further arranged in the headspace heating block, the headspace sample introduction needle is communicated with the headspace sample introduction channel, and a headspace motor is connected with the headspace sample introduction rod through a first driving assembly and is used for driving the headspace sample introduction rod to push the sample bottle into the headspace heating block and enabling the headspace sample introduction needle to puncture a sealing gasket of the sample bottle.

Preferably, the air sampling assembly further comprises an analytic sampling needle, the analytic sampling needle is communicated with the analytic sampling channel, and the analytic motor is communicated with the analytic sampling needle through a second driving assembly and is used for driving the analytic sampling needle to pierce a sealing gasket of the analytic tube.

Preferably, still include the shell of cladding liquid appearance subassembly and air appearance subassembly of advancing, the headspace sample dish exposes outside the shell, and analytic sample dish cladding is inside the shell, and the shell is provided with the observation window that is used for observing analytic sample dish.

Preferably, the sampling device further comprises a controller, a plurality of electromagnetic valves are respectively arranged in the headspace sampling channel and the analysis sampling channel, the controller is electrically connected with the headspace bottle motor and the analysis motor, the controller is further connected with the headspace six-way valve, the analysis six-way valve and the electromagnetic valves, and an operation screen is further arranged on the shell and used for controlling the controller.

Compared with the prior art, the beneficial effects of the utility model are that: the two kinds of pretreatment equipment of the environmental air treatment equipment and the environmental liquid treatment equipment are combined into one, the size is small, the functions are multiple, the analysis is carried out on the same gas chromatography by using a sample pipeline, the pipeline of a chromatographic sample inlet is not required to be frequently replaced, the switching between the environmental air sample and the environmental liquid sample is carried out in the same pipeline, and thus, a series of problems such as air leakage and the like caused by replacing a gas circuit can not be involved.

Drawings

Fig. 1 is an isometric view of an assembly of a pre-processing integrated machine for processing an ambient air sample and a liquid sample according to an embodiment of the present invention.

Fig. 2 is an assembly view of the liquid sample injection assembly and the air sample injection assembly of fig. 1.

Fig. 3 is a schematic structural diagram of the liquid sample injection assembly shown in fig. 2.

Fig. 4 is a schematic structural diagram of the air sampling assembly shown in fig. 2.

Fig. 5 is the gas circuit structure diagram of the headspace sampling channel and the analytic sampling channel of the present invention.

Wherein the reference numbers are as follows:

10. a liquid sample introduction assembly; 11. a headspace sample pan; 12. a bottle-jacking motor; 13. a headspace heating block 13; 14. a headspace drive motor 14; 15. a bottle-jacking motor assembly; 20. an air sample injection assembly; 21. analyzing the sample disc; 22. resolving the motor; 23. analyzing the heating block; 24. resolving the driving motor; 25. analyzing a sample injection needle; 30. a carrier gas outlet; 40. a headspace sample introduction channel; 41. a headspace six-way valve; 42. a dosing tube; 43. a sample bottle 43; 44. an electromagnetic valve; 45. a headspace vent; 46. a carrier gas outlet; 50. analyzing a sample feeding channel; 51. resolving the six-way valve; 52. a cold trap tube; 53. a desorption tube; 54. an electromagnetic valve; 55. analyzing the exhaust port; 56. a sample inlet; 60. a housing; 61. an observation window; 62. and operating the screen.

Detailed Description

In order to more clearly illustrate the technical features of the present invention, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "liquid level", "vertical", "liquid level", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or components referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1 to 5, the present invention provides a pretreatment integrated machine for processing an ambient air sample and a liquid sample, comprising: the liquid sample injection assembly 10 and the air sample injection assembly 20 are arranged in the sample injection system, and a carrier gas outlet 46 of the gas chromatograph is sequentially communicated with the headspace six-way valve 41, the analytic six-way valve 51 and a sample injection port of the gas chromatograph; the liquid sample injection assembly 10 comprises a sample bottle 43, the sample bottle 43 is connected with a headspace six-way valve 41, the headspace six-way valve 41 is also communicated with a headspace sample injection channel 40, and a sealing assembly of the headspace six-way valve 41 is adjusted to be communicated with the carrier gas outlet 30, the sample bottle 43 and a sample injection port; the air sampling assembly 20 comprises a resolving pipe 53, the resolving pipe 53 is connected with a resolving six-way valve 51, the resolving six-way valve 51 is also communicated with a resolving sampling channel 50, and a sealing assembly of the resolving six-way valve 51 is adjusted to be communicated with the carrier gas outlet 46, the resolving pipe 53 and a sampling port.

Compared with the prior art, the beneficial effects of the utility model are that: the two kinds of pretreatment equipment of environment air treatment equipment and environment liquid treatment equipment are combined into one, the size is small, the functions are multiple, one sample pipeline is used for analyzing in the same gas chromatography, the pipeline of a chromatography sample inlet is not required to be frequently replaced, the environment air sample and the environment liquid sample are switched in the same pipeline, and therefore a series of problems such as air leakage caused by replacement of a gas circuit can be avoided.

Referring to fig. 5, in one embodiment, the second interface of the headspace six-way valve 41 is connected to a carrier gas outlet 4630 of the gas chromatograph, the first interface of the headspace six-way valve 41 is connected to the second interface of the resolution six-way valve 51, and the first interface of the resolution six-way valve 51 is connected to the sample inlet of the gas chromatograph.

Referring to fig. 5, a plurality of solenoid valves 44 are disposed in the headspace sample injection channel, and by adjusting these solenoid valves 44, the headspace six-way valve and the analytic six-way valve, three operation modes can be realized: the pressure system, the normal pressure system, and the negative pressure system are explained below:

1. the operation state of the headspace part: (pressure mode)

The carrier gas for gas chromatography enters from the 2 ports of the headspace six-way valve, exits from the 1 port, enters from the 2 ports of the analytic six-way valve, and exits from the 1 port. The sample dish is according to self-defined setting and is look for the sample position automatically through the sensor (this product is 20 automatic, enlarges the sample dish and can increase the sample grade). The top bottle motor 12 moves upwards, the sample bottle 43 is moved into the top air heating box to be balanced, the V2 electromagnetic valve 44 is opened, the top air sampling pipeline is purged and cleaned according to user-defined time, the V2 electromagnetic valve 44 is closed after purging time is finished, the balance time is finished, the top bottle motor 12 continues to move upwards, and the top air sampling needle penetrates through a sealing gasket of the sample bottle 43 to stop moving. The V2 solenoid 44 is opened and high pressure gas enters through 4 ports and exits through 3 ports of the headspace six-way valve, passes through the dosing ring, enters through 6 ports and exits through 5 ports, pressurizes and equilibrates in the sample vial 43, and the V2 solenoid 44 is closed. The V4 electromagnetic valve 44 is opened, the high-pressure vaporized sample in the sample bottle 43 enters the 5-port inlet of the headspace six-way valve through the headspace sample injection needle, exits from the 6-port inlet, passes through the quantitative tube 42, enters from the 3-port inlet, exits from the 4-port outlet, the pressure in the sample bottle 43 is released to be consistent with the atmospheric pressure, and the V4 electromagnetic valve 44 is closed. And (3) rotating the headspace six-way valve, allowing carrier gas to enter from the port 2, exit from the port 3, pass through the quantitative tube 42, enter from the port 6, exit from the port 1, enter from the port 2 of the analytic six-way valve, exit from the port 1, allowing a sample to enter a gas chromatograph for analysis, starting running set analysis time at the same time, and finishing sampling and rotating the headspace six-way valve for resetting. At the end of the analysis time, the top bottle motor 12 returns to the zero position and the sample bottle 43 is returned to its original sample level. The sample tray is automatically rotated to the next position and the above action is repeated.

2. The operation state of the headspace part: (atmospheric pressure mode)

The carrier gas for gas chromatography enters from the 2 nd port of the headspace six-way valve 41, exits from the 1 st port, enters from the 2 nd port of the analytical six-way valve 51, and exits from the 1 st port. The sample dish is according to self-defined setting and is look for the sample position automatically through the sensor (this product is 20 automatic, enlarges the sample dish and can increase the sample grade). The top bottle motor 12 moves upwards, the sample bottle 43 is moved into the top air heating box to be balanced, the V2 electromagnetic valve 44 is opened, the top air sampling pipeline is purged and cleaned according to user-defined time, the V2 electromagnetic valve 44 is closed after purging time is finished, the balance time is finished, the top bottle motor 12 continues to move upwards, and the top air sampling needle penetrates through a sealing gasket of the sample bottle 43 to stop moving. The V4 electromagnetic valve 44 is opened, the high-pressure vaporized sample in the sample bottle 43 enters the 5-port inlet of the headspace six-way valve 41 through the headspace sample injection needle, exits from the 6-port inlet, passes through the quantitative tube 42, enters from the 3-port inlet, exits from the 4-port outlet, the pressure in the sample bottle 43 is released to be consistent with the atmospheric pressure, and the V4 electromagnetic valve 44 is closed. And rotating the headspace six-way valve 41, wherein the carrier gas enters from the port 2, exits from the port 3, passes through the quantitative tube 42, enters from the port 6, exits from the port 1, enters from the port 2 of the analytic six-way valve 51, exits from the port 1, enters the gas chromatograph for analysis, and simultaneously starts to run for the set analysis time, and the headspace six-way valve 41 is rotated and reset after the sample injection is finished. At the end of the analysis time, the top bottle motor 12 is returned to the zero position and the sample bottle 43 is returned to its original sample level. The sample tray is automatically rotated to the next position and the above action is repeated. And finally out of the headspace exhaust port 45.

3. The operation state of the headspace part: (negative pressure mode)

The carrier gas for gas chromatography enters from the 2 nd port of the headspace six-way valve 41, exits from the 1 st port, enters from the 2 nd port of the analytical six-way valve 51, and exits from the 1 st port. The sample dish is according to self-defined setting and is look for the sample position automatically through the sensor (this product is 20 automatic, enlarges the sample dish and can increase the sample grade). The top bottle motor 12 moves upwards to move the sample bottle 43 into the top air heating block 13 for balancing, the V2 electromagnetic valve 44 is opened, the top air sampling pipeline is purged and cleaned according to the user-defined time, the V2 electromagnetic valve 44 is closed after the purging time is finished, the balancing time is finished, the top bottle motor 12 continues to move upwards, and the top air sampling needle punctures the sealing gasket of the sample bottle 43 to stop moving. The V7 electromagnetic valve 44 is opened while the negative pressure pump is opened, the vaporized sample in the sample bottle 43 enters the 5-port inlet of the headspace six-way valve 41 through the headspace sampling needle, exits from the 6-port inlet, passes through the quantitative tube 42, enters from the 3-port inlet, and exits from the 4-port inlet, the pressure in the sample bottle 43 is pumped to a negative pressure state, and the V7 electromagnetic valve 44 is closed while the negative pressure pump is closed. And rotating the headspace six-way valve 41, wherein the carrier gas enters from the port 2, exits from the port 3, passes through the quantitative tube 42, enters from the port 6, exits from the port 1, enters from the port 2 of the analytic six-way valve 51, exits from the port 1, enters the gas chromatograph for analysis, and simultaneously starts to run for the set analysis time, and the headspace six-way valve 41 is rotated and reset after the sample injection is finished. At the end of the analysis time, the top bottle motor 12 is returned to the zero position and the sample bottle 43 is returned to its original sample level. The sample tray is automatically rotated to the next position and the above action is repeated.

Referring to fig. 5, the analytic sample channel includes a plurality of analytic solenoid valves 54, and the analytic solenoid valves 54 and the analytic six-way valve 51 are adjusted to realize the analytic part operation status, which includes the following steps:

the carrier gas for gas chromatography enters from the 2 nd port of the headspace six-way valve 41, exits from the 1 st port, enters from the 2 nd port of the analytical six-way valve 51, and exits from the 1 st port. The sample dish is according to self-defined setting and is look for the sample position automatically through the sensor (this product is 24 automatic, enlarges the sample dish and can increase the sample grade). The analysis motor 22 works, the analysis sampling needle 25 is driven by the positive and negative lead screws to synchronously move inwards, the sealing gasket is punctured, the analysis tube 53 is clamped once, and meanwhile the heating block moves forwards to heat the analysis tube 53. And opening the V5 and V6 electromagnetic valves 44, enabling the enriched gas to flow out of the V5, enabling the sample to enter the 5 ports of the analytical six-way valve 51 from the primary analytical pipe 53, flow out of the 6 ports, enter the cold trap pipe 52 in the low-temperature trap for enrichment, flow into the 3 ports, flow out of the 4 ports, discharging the enriched gas from the V6 electromagnetic valves 44, and closing the V5 and V6 electromagnetic valves 44 after the enrichment time is over. And (3) rotating the analysis six-way valve 51, enabling the carrier gas to enter from the port 2, exit from the port 1, enter the port 2 of the analysis six-way valve 51, exit from the port 3, pass through the cold trap pipe 52, enter the port 6, exit from the port 1, enabling the sample to enter the gas chromatograph for analysis, starting to run the set analysis time, and ending sample injection to analyze the rotation reset of the six-way valve 51. The V3, V8 solenoid valve 44 is opened, gas enters the 4 ports of the resolver six-way valve 51 from the V3 solenoid valve 44, exits from the 3 ports, enters the 6 ports through the cold trap pipe 52, exits from the 5 ports, enters the V8 solenoid valve 44 through the primary resolver pipe 53, and is discharged, and the V3, V8 solenoid valve 44 is closed after the activation time. After the analysis time is over, the analysis sampling needle 25 is driven by the bidirectional screw rod to synchronously move outwards, and the analysis heating block 23 moves backwards to cool the analysis tube 53. The analysis sample disk 21 is automatically rotated to the next position, and the above operation is repeated. And finally exhausted from the desorption exhaust port 55.

Referring to fig. 1-3, in one embodiment, the liquid sampling assembly 10 includes a headspace sample tray 11, a headspace bottle motor 12, and a headspace heating block 13, wherein the headspace sample tray 11 has sample bottles 43 disposed therein, and the headspace bottle motor 12 is configured to drive the proximity sample bottles 43 to the headspace heating block 13.

Referring to fig. 4, in one embodiment, the air sampling assembly 20 includes a resolving sample tray 21, a resolving motor 22 and a resolving heating block 23, the resolving sample tray 21 is disposed below the headspace sample tray 11, a resolving tube 53 is disposed in the resolving sample tray 21, and the resolving motor 22 is used for driving the resolving heating block 23 to be close to the resolving tube 53.

Referring to fig. 1 to fig. 3, the liquid sample injection assembly 10 further includes a headspace sample injection rod disposed below the headspace sample tray 11, a headspace sample injection needle is further disposed in the headspace heating block 13, the headspace sample injection needle is communicated with the headspace sample injection channel 40, and the headspace motor 12 is connected to the headspace sample injection rod through a first driving assembly, so as to drive the headspace sample injection rod to push the sample bottle 43 into the headspace heating block 13, and enable the headspace sample injection needle to puncture a sealing gasket of the sample bottle 43.

Referring to fig. 4, in an embodiment, the air sampling assembly 20 further includes a resolving sample needle 25, the resolving sample needle 25 is communicated with the resolving sample channel 50, and the resolving motor 22 is communicated with the resolving sample needle 25 through a second driving assembly for driving the resolving sample needle 25 to pierce a sealing gasket of the resolving tube 53.

Referring to fig. 1, in one embodiment, the sample analyzer further comprises a housing 60 enclosing the liquid sample injection assembly 10 and the air sample injection assembly 20, the headspace sample tray 11 is exposed outside the housing 60, the analytic sample tray 21 is enclosed inside the housing 60, and the housing 60 is provided with a viewing window 61 for viewing the analytic sample tray 21. Referring to fig. 2, in a specific embodiment, the liquid sample injection assembly 10 and the air sample injection assembly 20 are respectively disposed on a support bracket 63, and the support bracket 63 is enclosed in the housing 60.

Referring to fig. 1, in one embodiment, the apparatus further includes a controller, a plurality of electromagnetic valves 44 are respectively disposed in the headspace sampling channel 40 and the analytic sampling channel 50, the controller is electrically connected to the headspace bottle motor 12 and the analytic motor 22, the controller is further connected to the headspace six-way valve 41, the analytic six-way valve 51 and the electromagnetic valves 44, and an operation screen 62 is further disposed on the housing 60, and the operation screen 62 is used for operating the controller.

The technical features that the utility model has not been described can be realized through or adopt prior art, and no longer give unnecessary details here, and of course, the above-mentioned explanation is not right the utility model discloses a restriction, the utility model discloses also not only be limited to the above-mentioned example, ordinary skilled person in this technical field is in the utility model discloses a change, modification, interpolation or replacement made in the essential scope also should belong to the utility model discloses a protection scope.

Claims (8)

1. The utility model provides a handle preceding all-in-one of environmental air sample and liquid sample which characterized in that includes:

a carrier gas outlet of the gas chromatograph is sequentially communicated with the headspace six-way valve, the analytic six-way valve and a sample inlet of the gas chromatograph;

the liquid sample injection assembly comprises a sample bottle, the sample bottle is connected with a headspace six-way valve, the headspace six-way valve is also communicated with a headspace sample injection channel, and the carrier gas outlet, the sample bottle and the sample injection port can be communicated by adjusting a sealing assembly of the headspace six-way valve;

air advances appearance subassembly, air advances appearance subassembly is including analytic pipe, analytic pipe links to each other with analytic six-way valve, analytic six-way valve still is linked together with analytic sampling channel, adjusts the seal assembly of analytic six-way valve can communicate the carrier gas export analytic pipe with the introduction port.

2. The pre-processing integrated machine for processing environmental air samples and liquid samples as claimed in claim 1, wherein the second interface of the headspace six-way valve is connected to a carrier gas outlet of a gas chromatograph, the first interface of the headspace six-way valve is connected to the second interface of the analytical six-way valve, and the first interface of the analytical six-way valve is connected to a sample inlet of the gas chromatograph.

3. The pre-processing all-in-one machine for processing environmental air samples and liquid samples according to claim 2, wherein the liquid sample injection assembly comprises a headspace sample tray, a headspace bottle motor and a headspace heating block, wherein sample bottles are arranged in the headspace sample tray, and the headspace bottle motor is used for driving the headspace heating block to be close to the sample bottles.

4. The all-in-one pretreatment for processing environmental air samples and liquid samples according to claim 3, wherein the air sampling assembly comprises a desorption sample tray, a desorption motor and a desorption heating block, the desorption sample tray is arranged below the headspace sample tray, a desorption tube is arranged in the desorption sample tray, and the desorption motor is used for driving the desorption heating block to be close to the desorption tube.

5. The integrated pretreatment machine for processing environmental air samples and liquid samples according to claim 4, wherein the liquid sampling assembly further comprises a headspace sampling rod disposed below the headspace sample tray, a headspace sampling needle is further disposed in the headspace heating block, the headspace sampling needle is communicated with the headspace sampling channel, and the headspace bottle motor is connected with the headspace sampling rod through a first driving assembly and is used for driving the headspace sampling rod to push the sample bottle into the headspace heating block and enabling the headspace sampling needle to puncture the sealing gasket of the sample bottle.

6. The integrated pretreatment machine according to claim 5, wherein the air sampling assembly further comprises an analysis sampling needle, the analysis sampling needle is communicated with the analysis sampling channel, and the analysis motor is communicated with the analysis sampling needle through a second driving assembly for driving the analysis sampling needle to pierce the sealing pad of the analysis tube.

7. The integrated pretreatment machine according to claim 6, further comprising a housing for housing the liquid sample injection assembly and the air sample injection assembly, wherein the headspace sample tray is exposed outside the housing, the analytical sample tray is housed inside the housing, and the housing is provided with an observation window for observing the analytical sample tray.

8. The integrated pretreatment machine for processing the ambient air sample and the liquid sample according to claim 7, further comprising a controller, wherein a plurality of solenoid valves are respectively disposed in the headspace sample injection channel and the desorption sample injection channel, the controller is connected to the headspace bottle motor and the desorption motor, the controller is further connected to the headspace six-way valve, the desorption six-way valve and the solenoid valves, and an operation screen is further disposed on the housing and used for controlling the controller.

Images