Automatic sample injector and chromatographic detection equipment

Abstract

The utility model provides an automatic sample injector and chromatographic detection equipment, and the automatic sample injector comprises at least one first multi-way valve, the first multi-way valve is provided with a port, and the port is configured to be connected with a high-pressure constant flow pump; and the at least one second multi-way valve is configured, the second multi-way valve is configured to be connected with the first multi-way valve in series, and the second multi-way valve is configured with another port which is configured to be used for being connected with a chromatographic analysis system. By switching the first multi-way valve and the second multi-way valve respectively, quantitative loops with different volumes can be switched, samples with different volumes can be injected, the work of manually replacing the quantitative loops is avoided, the limitation that the quantitative loops cannot be automatically switched by an automatic sample injector is solved, the efficiency is improved, and the use scene is expanded; the burden of operators is relieved, and the stability and the reliability are improved.

Description

Technical Field

[0001] The present application relates to the technical field of chromatography analysis, and in particular to an automatic sample injector and chromatography detection equipment. Background Art

[0002] The automatic sampler is an important instrument in chemical analysis experiments. It can avoid the problems of inaccurate quantitative analysis, errors caused by long-term repetitive work, and low work efficiency caused by manual sampling.

[0003] In related technologies, the automatic sampler generally only contains a six-way valve, which means that when quantitative loops of different volumes need to be replaced, manual disassembly is required, which increases the difficulty and workload. Utility Model Content

[0004] The purpose of this application is to provide an automatic sample injector and chromatographic detection equipment that can control the entry of samples of different volumes, eliminate the risks brought by manual replacement, and reduce the burden on operators.

[0005] In a first aspect, an embodiment of the present application provides an automatic sample injector, comprising: a first multi-way valve, which is configured with at least one, and the first multi-way valve is configured with a port, which is configured for connecting to a high-pressure constant flow pump; a second multi-way valve, which is configured with at least one, the second multi-way valve is configured to be connected in series with the first multi-way valve, and the second multi-way valve is configured with another port, which is configured for connecting to a chromatographic analysis system.

[0006] In the above implementation process, the first multi-way valve and the second multi-way valve are connected in series, and the first multi-way valve and the second multi-way valve are each configured with at least one, so that after the first multi-way valve is connected to the high-pressure constant flow pump and the second multi-way valve is connected to the chromatographic analysis system, the first multi-way valve and the second multi-way valve can be switched respectively to switch the quantitative rings of different volumes and realize the injection of samples of different volumes, eliminating the work of manually replacing the quantitative rings, solving the limitation that the automatic sampler cannot automatically switch the quantitative rings, improving efficiency, expanding the usage scenarios, reducing the burden on operators, and improving stability and reliability.

[0007] In some embodiments, the first multi-port valve and the second multi-port valve are connected in series, and the autosampler operates in at least three modes.

[0008] In the above implementation process, by connecting the first multi-way valve and the second multi-way valve in series, switching the first multi-way valve and the second multi-way valve respectively to operate in different modes, samples in quantitative loops of different volumes can be accurately and efficiently entered into the chromatographic analysis system, eliminating the work of manually replacing the quantitative loops, reducing the burden on the operator, and improving stability and reliability.

[0009] In some embodiments, the first multi-way valve includes a first six-way valve, which includes a first valve port, a second valve port, a third valve port, a fourth valve port, a fifth valve port, a sixth valve port, and a first quantitative loop. The second valve port is connected to the high-pressure constant flow pump, and the first quantitative loop is connected to the first valve port and the fourth valve port, respectively. A pre-set program can be executed to control the operation of the first multi-way valve and / or the second multi-way valve, enabling different volume quantitative loops of the same weight to switch their pipeline connection methods at will, thereby ensuring the stability and efficiency of the autosampler, reducing labor, and reducing human risks.

[0010] In some embodiments, the second multi-way valve includes a second six-way valve, which includes a seventh valve port, an eighth valve port, a ninth valve port, a tenth valve port, an eleventh valve port, a twelfth valve port, and a second quantitative loop. The eighth valve port is connected to the chromatographic analysis system, the second quantitative loop is connected to the seventh valve port and the tenth valve port, respectively, the eighth valve port is connected to the third valve port, and the twelfth valve port is connected to the fifth valve port. The operation of the first multi-way valve and / or the second multi-way valve can be controlled by a set program, so that quantitative loops of different volumes with the same weight can switch their pipeline connection methods at will, thereby ensuring the stability and efficiency of the automatic sampler, reducing labor and human risks.

[0011] In some embodiments, when the automatic sampler operates in the first mode, the first valve port is connected to the sixth valve port, the second valve port is connected to the third valve port, the fourth valve port is connected to the fifth valve port, the seventh valve port is connected to the twelfth valve port, the eighth valve port is connected to the ninth valve port, and the tenth valve port is connected to the eleventh valve port.

[0012] In the above implementation process, when the automatic sampler runs in the first mode, it can be controlled by program so that the first quantitative ring and the second quantitative ring are both filled with samples, which solves the limitation that the automatic sampler cannot automatically switch the quantitative ring, improves efficiency, expands the usage scenarios, eliminates the work of manually replacing the quantitative ring, and improves stability and reliability.

[0013] In some embodiments, when the automatic sampler operates in the second mode, the first valve port is connected to the second valve port, the third valve port is connected to the fourth valve port, the fifth valve port is connected to the sixth valve port, the seventh valve port is connected to the twelfth valve port, the eighth valve port is connected to the ninth valve port, and the tenth valve port is connected to the eleventh valve port.

[0014] In the above implementation process, when the automatic sampler runs in the second mode, the set program can be executed on the basis of the first mode to control the second multi-way valve to not move, and the first multi-way valve to switch, and finally enter the chromatographic analysis system, so as to realize the injection of the first quantitative ring, thereby solving the limitation that the automatic sampler cannot automatically switch the quantitative ring, improving efficiency, expanding the usage scenarios, eliminating the tediousness of manually replacing the quantitative ring, and improving stability and reliability.

[0015] In some embodiments, when the automatic sampler operates in the third mode, the first valve port is connected to the sixth valve port, the second valve port is connected to the third valve port, the fourth valve port is connected to the fifth valve port, the seventh valve port is connected to the eighth valve port, the ninth valve port is connected to the tenth valve port, and the eleventh valve port is connected to the twelfth valve port.

[0016] In the above implementation process, when the automatic sampler runs in the third mode, the set program can be executed on the basis of the first mode to control the first multi-way valve to not move, the second multi-way valve to switch, and finally enter the chromatographic analysis system, so as to realize the injection of the second quantitative ring, thereby solving the limitation that the automatic sampler cannot automatically switch the quantitative ring, improving efficiency, expanding the usage scenarios, eliminating the tediousness of manually replacing the quantitative ring, and improving stability and reliability.

[0017] In some embodiments, the sixth valve port is connected to the injection module, and the eleventh valve port is connected to the waste liquid bucket; or, the sixth valve port is connected to the sample bottle, and the eleventh valve port is connected to the injection module.

[0018] In some embodiments, when the eleventh valve port is connected to the injection module, the injection module is connected to the waste liquid barrel.

[0019] In a second aspect, the present application also provides a chromatographic detection device, comprising an automatic sample injector as described in any one of the above items.

[0020] Since the chromatographic detection device provided in the second aspect includes an automatic sample injector, the chromatographic detection device has all the technical effects of the automatic sample injector, which will not be described in detail here.

[0021] Other features and advantages of the present application will be described in the subsequent description, or some features and advantages can be inferred or determined without doubt from the description, or can be learned by implementing the above-mentioned technology of the present application.

[0022] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 A schematic diagram of the structure of the automatic sample injector provided in an embodiment of the present application operating in the first mode;

[0025] Figure 2 A schematic diagram of the structure of the automatic sample injector provided in an embodiment of the present application operating in the second mode;

[0026] Figure 3 This is a schematic structural diagram of the third mode of operation of the automatic sampler provided in an embodiment of the present application.

[0027] Figure markings: 100, first multi-way valve; 101, first valve port; 102, second valve port; 103, third valve port; 104, fourth valve port; 105, fifth valve port; 106, sixth valve port; 107, first quantitative ring; 200, second multi-way valve; 201, seventh valve port; 202, eighth valve port; 203, ninth valve port; 204, tenth valve port; 205, eleventh valve port; 206, twelfth valve port; 207, second quantitative ring. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of this application.

[0029] In this application, terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "center," "vertical," "horizontal," "transverse," and "longitudinal" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are primarily intended to better describe this application and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation.

[0030] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0031] Furthermore, the terms "installed," "disposed," "provided with," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or point connections; direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0032] Furthermore, the terms "first," "second," and the like are primarily used to distinguish different devices, elements, or components (which may or may not be the same in type and configuration) and are not intended to indicate or imply the relative importance or quantity of the devices, elements, or components indicated. Unless otherwise specified, "plurality" means two or more. Example

[0033] In the field of chromatography detection, automatic sample injectors have been widely used to replace manual methods to allow samples to enter the chromatography system for analysis. The existing sample injector has a two-position six-way valve. By manually installing quantitative rings of different volumes, the sample in the quantitative ring is allowed to enter the chromatography system for analysis. This leads to manual removal and installation of the quantitative ring, which increases the difficulty of use. At the same time, manual replacement will bring new installation problems, such as tube collapse or leakage caused by insufficient tightening. If different injection volumes need to be adjusted alternately, the quantitative ring needs to be replaced alternately at the same time, which increases the workload.

[0034] The purpose of the present application is to control the entry of samples of different volumes into the chromatographic analysis system by using at least two first multi-way valves and a second multi-way valve, thereby eliminating the tediousness of manual replacement and truly reducing the burden on operators. Different quantitative rings can be switched to meet the requirements of different experimental procedures, improving stability and errors caused by human factors, improving efficiency, and realizing the high efficiency and accuracy of the automatic sampler, reducing the burden on personnel and enabling continuous automatic sampling and usage scenarios.

[0035] like Figure 1-Figure 3As shown, in the first aspect, an embodiment of the present application provides an automatic sample injector, comprising: a first multi-way valve 100, which is configured with at least one, and the first multi-way valve 100 is configured with a port, which is configured to be used for connecting to a high-pressure constant flow pump; a second multi-way valve 200, which is configured with at least one, the second multi-way valve 200 is configured to be connected in series with the first multi-way valve 100, and the second multi-way valve 200 is configured with another port, which is configured to be used for connecting to a chromatographic analysis system.

[0036] Exemplarily, the first multi-way valve 100 (which can be defined as valve A) is provided with one, and the second multi-way valve 200 (which can be defined as valve B) is provided with one, and the first multi-way valve 100 and the second multi-way valve 200 are connected in series. Of course, in order to expand the usage scenarios, reduce the tediousness of manual replacement of quantitative rings, improve stability and reliability, and enable N quantitative ring samples of different volumes to enter the chromatography analysis system, the first multi-way valve 100 and the second multi-way valve 200 can be provided with multiple, and multiple first multi-way valves 100 are connected in series to form a first multi-way valve group, and multiple second multi-way valves 200 are connected in series to form a second multi-way valve group. The first multi-way valve group is finally connected in series with the second multi-way valve group, and the quantitative ring capacities of the multiple first multi-way valves 100 can be set to be consistent or different, and the quantitative ring capacities of the multiple second multi-way valves 200 can be set to be consistent or different, which will not be described one by one here.

[0037] In the above implementation process, the first multi-way valve 100 and the second multi-way valve 200 are connected in series, and the first multi-way valve 100 and the second multi-way valve 200 are each configured with at least one, so that after the first multi-way valve 100 is connected to the high-pressure constant flow pump and the second multi-way valve 200 is connected to the chromatographic analysis system, the first multi-way valve 100 and the second multi-way valve 200 can be switched respectively to switch quantitative rings of different volumes and realize the injection of samples of different volumes, eliminating the tedious manual replacement of quantitative rings, solving the limitation that the automatic sampler cannot automatically switch quantitative rings, improving efficiency, expanding usage scenarios, reducing the burden on operators, and improving stability and reliability.

[0038] In some embodiments, the first multi-way valve 100 and the second multi-way valve 200 are connected in series, and the automatic sampler operates in at least three modes, including a dual-valve loading (LOAD) mode, a first multi-way valve 100 injection (INJECT) and a second multi-way valve 200 loading (LOAD) mode, and a first multi-way valve 100 loading (LOAD) and a second multi-way valve 200 injection (INJECT) mode.

[0039] In the above implementation process, by connecting the first multi-way valve 100 and the second multi-way valve 200 in series, switching the first multi-way valve 100 and the second multi-way valve 200 respectively to operate in different modes, samples in quantitative loops of different volumes can be accurately and efficiently introduced into the chromatographic analysis system, eliminating the tedious manual replacement of quantitative loops, reducing the burden on operators, and improving stability and reliability.

[0040] In some embodiments, the first multi-way valve 100 comprises a first six-way valve, comprising a first valve port 101, a second valve port 102, a third valve port 103, a fourth valve port 104, a fifth valve port 105, a sixth valve port 106, and a first dosing loop 107. The second valve port 102 is connected to the high-pressure constant flow pump, and the first dosing loop 107 is connected to the first valve port 101 and the fourth valve port 104. A pre-set program can be executed to control the operation of the first multi-way valve 100 and / or the second multi-way valve 200, enabling the flexible switching of the piping connection modes of dosing loops of different volumes with the same weight, thereby ensuring the stability and efficiency of the autosampler, reducing labor, and minimizing human risk.

[0041] In some embodiments, the second multi-way valve 200 includes a second six-way valve, which includes a seventh valve port 201, an eighth valve port 202, a ninth valve port 203, a tenth valve port 204, an eleventh valve port 205, a twelfth valve port 206, and a second quantitative loop 207. The eighth valve port 202 is connected to the chromatographic analysis system, the second quantitative loop 207 is connected to the seventh valve port 201 and the tenth valve port 204, respectively. The eighth valve port 202 is connected to the third valve port 103, and the twelfth valve port 206 is connected to the fifth valve port 105. The operation of the first multi-way valve 100 and / or the second multi-way valve 200 can be controlled by a set program, enabling different volume quantitative loops of the same weight to switch their pipeline connection modes at will, thereby ensuring the stability and efficiency of the autosampler, reducing labor and human risk.

[0042] It is understandable that the first multi-way valve 100 and the second multi-way valve 200 are not limited to two-position six-way valves, but may also be two-position eight-way valves, etc., and may be set according to actual conditions.

[0043] like Figure 1 As shown, when the automatic sampler operates in the first mode (i.e., the dual-valve LOAD mode), the first valve port 101 is connected to the sixth valve port 106, the second valve port 102 is connected to the third valve port 103, the fourth valve port 104 is connected to the fifth valve port 105, the seventh valve port 201 is connected to the twelfth valve port 206, the eighth valve port 202 is connected to the ninth valve port 203, and the tenth valve port 204 is connected to the eleventh valve port 205.

[0044] Illustratively, in the first mode, the sample first fills the first quantitative ring 107 and then fills the second quantitative ring 207; specifically, assuming that the first quantitative ring 107 is a small ring (for example, 25ul) and the second quantitative ring 207 is a large ring (for example, 500ul), when the actual situation requires only the use of the first quantitative ring 107 to meet the requirements, then it is only necessary to fill the first quantitative ring 107, and it is not necessary to fill the second quantitative ring 207, which can save sample filling time and cleaning time. Of course, it is not ruled out that the second quantitative ring 207 (large ring) is filled first and then the second quantitative ring 107 (small ring) is filled.

[0045] In the above implementation process, when the automatic sampler runs in the first mode, it can be controlled by program so that the first quantitative ring 107 and the second quantitative ring 207 are both filled with samples, which solves the limitation that the automatic sampler cannot automatically switch the quantitative rings, improves efficiency, expands the usage scenarios, eliminates the tediousness of manually replacing the quantitative rings, and improves stability and reliability.

[0046] like Figure 2 As shown, when the automatic sampler runs in the second mode (i.e., the first multi-way valve 100INJECT and the second multi-way valve 200LOAD mode), the first valve port 101 is connected to the second valve port 102, the third valve port 103 is connected to the fourth valve port 104, the fifth valve port 105 is connected to the sixth valve port 106, the seventh valve port 201 is connected to the twelfth valve port 206, the eighth valve port 202 is connected to the ninth valve port 203, and the tenth valve port 204 is connected to the eleventh valve port 205.

[0047] In the above-mentioned implementation process, when the automatic sampler runs in the second mode, the set program can be executed on the basis of the first mode to control the second multi-way valve 200 to be inactive, and the first multi-way valve 100 to be switched, and finally enter the chromatographic analysis system, so as to realize the injection of the first quantitative ring 107, thereby solving the limitation that the automatic sampler cannot automatically switch the quantitative ring, improving efficiency, expanding the usage scenarios, eliminating the tediousness of manually replacing the quantitative ring, and improving stability and reliability.

[0048] like Figure 3 As shown, when the automatic sampler operates in the third mode (i.e., the first multi-way valve 100LOAD and the second multi-way valve 200INJECT mode), the first valve port 101 is connected to the sixth valve port 106, the second valve port 102 is connected to the third valve port 103, the fourth valve port 104 is connected to the fifth valve port 105, the seventh valve port 201 is connected to the eighth valve port 202, the ninth valve port 203 is connected to the tenth valve port 204, and the eleventh valve port 205 is connected to the twelfth valve port 206.

[0049] In the above-mentioned implementation process, when the automatic sampler runs in the third mode, the set program can be executed on the basis of the first mode to control the first multi-way valve 100 to be inactive and the second multi-way valve 200 to be switched, and finally enter the chromatographic analysis system, so as to realize the injection of the second quantitative loop, thereby solving the limitation that the automatic sampler cannot automatically switch the quantitative loop, improving efficiency, expanding the usage scenarios, eliminating the tediousness of manually replacing the quantitative loop, and improving stability and reliability.

[0050] In some embodiments, the sixth valve port 106 is connected to an injection module (e.g., a manual syringe, used to push the liquid sample or cleaning fluid toward the eleventh valve port 205), the eleventh valve port 205 is connected to a waste liquid bucket, or the sixth valve port 106 is connected to a sample bottle (the sample bottle is used to load a liquid sample or cleaning fluid), and the eleventh valve port 205 is connected to the injection module, used to suck the medium in the sample bottle from the sixth valve port 106 toward the eleventh valve port 205.

[0051] In some embodiments, when the eleventh valve port 205 is connected to the injection module, the injection module is connected to the waste liquid barrel, and the waste liquid barrel is used to accommodate excess medium sucked from the sixth valve port 106 toward the eleventh valve port 205 .

[0052] In a second aspect, the present application also provides a chromatographic detection device, comprising the automatic sample injector as described above.

[0053] Since the chromatographic detection device provided in the second aspect includes an automatic sample injector, the chromatographic detection device has all the technical effects of the automatic sample injector, which will not be described in detail here.

[0054] In all embodiments of the present application, "big" and "small" are relative, "more" and "less" are relative, and "up" and "down" are relative. The expressions of such relative terms will not be elaborated in the embodiments of the present application.

[0055] It should be understood that the phrases “in this embodiment,” “in an embodiment of the present application,” or “as an optional implementation” mentioned throughout the specification mean that specific features, structures, or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, “in this embodiment,” “in an embodiment of the present application,” or “as an optional implementation” appearing throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics may be combined in one or more embodiments in any suitable manner. Those skilled in the art should also be aware that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily required for the present application.

[0056] In the various embodiments of the present application, it should be understood that the size of the serial numbers of the above-mentioned processes does not necessarily mean the order of execution. The order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0057] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included within the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. An automatic sample injector, characterized in that include: A first multi-way valve is provided with at least one, wherein the first multi-way valve is provided with a port configured to be connected to a high-pressure constant-flow pump; The second multi-way valve is configured with at least one, the second multi-way valve is configured to be connected in series with the first multi-way valve, and the second multi-way valve is configured with another port configured to be connected to a chromatography analysis system.

2. The automatic sample injector according to claim 1, characterized in that The first multi-way valve and the second multi-way valve are connected in series, and the automatic sampler operates in at least three modes.

3. The automatic sample injector according to claim 1 or 2, characterized in that The first multi-way valve includes a first six-way valve, which includes a first valve port, a second valve port, a third valve port, a fourth valve port, a fifth valve port, a sixth valve port and a first quantitative ring. The second valve port is connected to the high-pressure constant flow pump, and the first quantitative ring is respectively connected to the first valve port and the fourth valve port.

4. The automatic sample injector according to claim 3, characterized in that The second multi-way valve includes a second six-way valve, which includes a seventh valve port, an eighth valve port, a ninth valve port, a tenth valve port, an eleventh valve port, a twelfth valve port and a second quantitative ring. The eighth valve port is connected to the chromatography analysis system, the second quantitative ring is respectively connected to the seventh valve port and the tenth valve port, the eighth valve port is connected to the third valve port, and the twelfth valve port is connected to the fifth valve port.

5. The automatic sample injector according to claim 4, characterized in that When the automatic sampler operates in the first mode, the first valve port is connected to the sixth valve port, the second valve port is connected to the third valve port, the fourth valve port is connected to the fifth valve port, the seventh valve port is connected to the twelfth valve port, the eighth valve port is connected to the ninth valve port, and the tenth valve port is connected to the eleventh valve port.

6. The automatic sample injector according to claim 4, characterized in that When the automatic sampler operates in the second mode, the first valve port is connected to the second valve port, the third valve port is connected to the fourth valve port, the fifth valve port is connected to the sixth valve port, the seventh valve port is connected to the twelfth valve port, the eighth valve port is connected to the ninth valve port, and the tenth valve port is connected to the eleventh valve port.

7. The automatic sample injector according to claim 4, characterized in that When the automatic sampler operates in the third mode, the first valve port is connected to the sixth valve port, the second valve port is connected to the third valve port, the fourth valve port is connected to the fifth valve port, the seventh valve port is connected to the eighth valve port, the ninth valve port is connected to the tenth valve port, and the eleventh valve port is connected to the twelfth valve port.

8. The automatic sample injector according to claim 4, characterized in that The sixth valve port is connected to the injection module, and the eleventh valve port is connected to the waste liquid bucket; or, the sixth valve port is connected to the sample bottle, and the eleventh valve port is connected to the injection module.

9. The automatic sample injector according to claim 8, characterized in that When the eleventh valve port is connected to the injection module, the injection module is connected to the waste liquid barrel.

10. A chromatographic detection device, characterized in that: The invention comprises an automatic sample injector as described in any one of claims 1 to 9.

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