Device for detecting organic matters in water

Abstract

The utility model discloses a device for detecting organic matters in water, which belongs to the technical field of detection of organic matters in water, realizes automatic feeding of sample liquid through communication of a liquid inlet pump and a purging container, and simultaneously, is respectively communicated with a first processing unit and a second processing unit on the purging container. The first treatment unit can separate volatile organic compounds in sample liquid in the purging container, the second treatment unit can separate semi-volatile organic compounds in the sample liquid in the purging container, and the semi-volatile organic compounds are separated from a carrier through the analysis unit. Then the volatile organic compounds and the semi-volatile organic compounds are detected through the detection system, so that the device can detect the volatile organic compounds and the semi-volatile organic compounds in the sample liquid, and the application range is wider when the organic compounds in the sample liquid are detected; the volatile organic compounds and the semi-volatile organic compounds in the sample liquid do not need to be respectively detected by two sets of detection devices, so that the detection cost is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of organic matter detection technology in water, specifically to an organic matter detection device in water. Background Technology

[0002] The detection of organic matter in water is mainly used to assess water quality and pollution levels, monitor the effectiveness of wastewater treatment, measure the biological oxygen demand of aquatic bodies, monitor organic pollution, and protect the environment.

[0003] Currently, the analysis of organic matter in water widely adopts manual sampling in the laboratory. After filtration and volume adjustment, the water sample is transferred to the laboratory's automated pretreatment equipment. The pretreated sample needs to be manually transferred to the gas chromatograph autosampler. Through the linkage between the autosampler and instruments such as gas chromatograph-mass spectrometer, the qualitative and quantitative analysis of organic matter in water can be achieved.

[0004] Meanwhile, existing water organic matter monitoring devices can only analyze one type of organic matter per device. Since volatile organic compounds and semi-volatile organic compounds use different pretreatment methods, different devices are required.

[0005] Based on this, the present invention designs a device for detecting organic matter in water to solve the above problems. Utility Model Content

[0006] To achieve the above objectives, this utility model provides the following technical solution: a device for detecting organic matter in water, comprising a sample processing system, an analytical unit, and a detection system.

[0007] The sample processing system includes an inlet pump, a purge container, a first processing unit, and a second processing unit. The outlet of the inlet pump is connected to the purge container to deliver the sample liquid into the purge container. The first processing unit is connected to the purge container to separate volatile organic compounds from the sample liquid in the purge container. The second processing unit is connected to the purge container to separate semi-volatile organic compounds from the sample liquid in the purge container.

[0008] Both the first processing unit and the second processing unit are connected to the detection system through the analytical unit, so that the volatile organic compounds or semi-volatile organic compounds separated from the sample solution can enter the detection system for detection. The analytical unit is used to separate the semi-volatile organic compounds from the carrier.

[0009] As a further embodiment of this utility model, the first processing unit includes a first inert gas source and a trap. The first inert gas source is connected to the air inlet of the purge container, and the trap is connected to the air outlet of the purge container, so as to purge volatile organic compounds in the sample liquid to the trap by inert gas, thereby achieving the separation of volatile organic compounds in the sample liquid.

[0010] As a further embodiment of this utility model, the first processing unit further includes a second inert gas source and a first multi-way valve, wherein the outlet of the purge container, the inlet and outlet of the trap, the second inert gas source, and the analysis unit are respectively connected to different ports of the first multi-way valve.

[0011] As a further embodiment of this utility model, the second processing unit includes an extraction container and an extraction element. The extraction container is connected to the purge container, so that the sample liquid in the purge container can be transferred to the extraction container. The extraction element is located in the extraction container and is used to adsorb semi-volatile organic compounds in the extracted sample liquid.

[0012] As a further embodiment of this invention, the extraction container is provided with a heating component and a stirring component for heating and stirring the sample liquid inside the extraction container.

[0013] As a further embodiment of this utility model, the extraction container is provided with a robotic arm assembly, which is used to clamp the extraction element so that the extraction element can enter or leave the extraction container and the analysis unit.

[0014] As a further embodiment of this utility model, the analytical unit includes an analytical tube, and the detection system includes a gas chromatography column oven and a mass spectrometer, wherein the analytical tube, the gas chromatography column oven and the mass spectrometer are connected in sequence.

[0015] As a further embodiment of this invention, the second inert gas source is also connected to the analytical tube.

[0016] As a further embodiment of this utility model, the first inert gas source is also connected to the first multi-way valve, and an air resistance is provided between the first inert gas source and the first multi-way valve.

[0017] As a further embodiment of this utility model, it also includes a second multi-port valve, wherein the first inert gas source, the second inert gas source, the gas chromatography column oven, and the analytical tube are respectively connected to different ports of the second multi-port valve.

[0018] This utility model has the following beneficial effects:

[0019] This device achieves automatic sample liquid injection through the connection between the inlet pump and the purge container. Simultaneously, a first processing unit and a second processing unit are connected to the purge container. The first processing unit separates volatile organic compounds (VOCs) from the sample liquid in the purge container, while the second processing unit separates semi-volatile organic compounds (SOCs). The SOCs are then separated from the carrier by an analytical unit. Subsequently, a detection system detects both VOCs and SOCs, enabling the device to detect both VOCs and SOCs in the sample liquid. This broadens the applicability of the device for detecting organic matter in sample liquids, eliminating the need for two separate detection devices and effectively reducing detection costs.

[0020] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0021] The accompanying drawings, which form 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 an undue limitation of the present invention. In the drawings:

[0022] Figure 1 This is a schematic diagram of the first connection relationship between the first multi-way valve and the second multi-way valve.

[0023] Figure 2 This is a schematic diagram of the second connection relationship of the first multi-way valve.

[0024] Figure 3 This is a schematic diagram of the second connection relationship of the second multi-way valve.

[0025] Legend:

[0026] 1. Liquid inlet assembly; 2. Purge container; 3. First inert gas source; 4. Trapping trap; 5. Second inert gas source; 6. First multi-way valve; 7. Extraction container; 8. Extraction element; 9. Robotic arm assembly; 10. Desorption tube; 11. Gas chromatography column; 12. Mass spectrometer; 13. Gas resistance; 14. Second multi-way valve; 15. Water removal trap. Detailed Implementation

[0027] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0028] Please see Figure 1-3 This utility model provides a technical solution: a device for detecting organic matter in water, comprising a sample processing system, an analytical unit, and a detection system.

[0029] The sample processing system includes a liquid inlet assembly 1, a purge container 2, a first processing unit, and a second processing unit. The outlet of the liquid inlet assembly 1 is connected to the purge container 2 to deliver the sample liquid into the purge container 2. The first processing unit is connected to the purge container 2 to separate volatile organic compounds from the sample liquid in the purge container 2. The second processing unit is connected to the purge container 2 to separate semi-volatile organic compounds from the sample liquid in the purge container 2.

[0030] The sample liquid is transported through the liquid inlet assembly 1. During operation, the sample liquid is transported to the purge container 2 through the liquid inlet assembly 1. Then, the volatile organic compounds in the sample liquid in the purge container 2 are separated by the first processing unit, and the semi-volatile organic compounds in the sample liquid in the purge container 2 are separated by the second processing unit. This allows the sample processing system to separate volatile organic compounds and semi-volatile organic compounds in the sample liquid, enabling the organic matter detection device to detect both volatile organic compounds and semi-volatile organic compounds, increasing the applicability of the organic matter detection device and reducing the detection cost. Optionally, the liquid inlet assembly 1 is a liquid inlet pump.

[0031] Both the first processing unit and the second processing unit are connected to the detection system through the analytical unit, so that the volatile organic compounds or semi-volatile organic compounds separated from the sample solution can enter the detection system for detection. The analytical unit is used to separate the semi-volatile organic compounds from the carrier.

[0032] When separating semi-volatile organic compounds in the sample solution through the second processing unit, the semi-volatile organic compounds need to be adsorbed and transported by a carrier. The semi-volatile organic compounds are transported to the analytical unit by the carrier, and then separated from the carrier by the analytical unit. The separated semi-volatile organic compounds enter the detection system for detection.

[0033] This device, by setting up a first processing unit and a second processing unit in the sample processing system, and the first processing unit and the second processing unit are used to separate volatile organic compounds and semi-volatile organic compounds in the sample solution, respectively, enables the device to detect volatile organic compounds and semi-volatile organic compounds in the sample solution. It has a wider range of applications when detecting organic compounds in sample solutions, and eliminates the need to use two sets of detection devices to detect volatile organic compounds and semi-volatile organic compounds in the sample solution separately, effectively reducing detection costs.

[0034] Furthermore, a first control valve is provided between the liquid inlet assembly 1 and the purge container 2. The first control valve can switch the liquid inlet assembly 1 and the purge container 2 between the open and closed circuits. When the sample liquid is delivered to the purge container 2 through the liquid inlet assembly 1, the liquid inlet volume can be controlled by the liquid inlet assembly 1 and the first control valve to achieve quantitative liquid inlet, making the overall device more automated and easier to use. Optionally, the first control valve is a solenoid valve.

[0035] like Figure 1 As shown, the first processing unit includes a first inert gas source 3 and a trap 4. The first inert gas source 3 is connected to the air inlet of the purge container 2, and the trap 4 is connected to the air outlet of the purge container 2, so as to purge the volatile organic compounds in the sample liquid to the trap 4 by using inert gas, thereby achieving the separation of volatile organic compounds in the sample liquid.

[0036] A second control valve is provided between the first inert gas source 3 and the purge container 2. The second control valve is used to control the passage or disconnection between the first inert gas source 3 and the purge container 2. When it is necessary to separate volatile organic compounds in the sample liquid, the second control valve between the first inert gas source 3 and the purge container 2 is opened first to keep the passage between the first inert gas source 3 and the purge container 2. At this time, the inert gas in the first inert gas source 3 will enter the purge container 2. The volatile organic compounds in the sample liquid are carried out by the inert gas entering the sample liquid and transported into the trap 4. Then, the trap 4 collects the volatile organic compounds carried by the inert gas, realizing the separation and collection of volatile organic compounds in the sample liquid by the purge and trap method.

[0037] Furthermore, such as Figure 1 As shown, the air inlet of the purge container 2 is located at the bottom of the purge container 2, and the air outlet of the purge container 2 is located at the top of the purge container 2. In this way, the inert gas enters the purge container 2 from the bottom and then passes through the entire purge container 2 from bottom to top before leaving the purge container 2 from the air outlet at the top of the purge container 2. Meanwhile, the sample liquid in the purge container 2 will fill the purge container 2 from bottom to top under the action of gravity. This arrangement of the air inlet and outlet allows the inert gas to completely pass through the sample liquid in the purge container 2, increasing the contact range between the inert gas and the sample liquid and improving the separation effect of volatile organic compounds in the sample liquid.

[0038] like Figure 2As shown, the first processing unit also includes a second inert gas source 5 and a first multi-way valve 6. The outlet of the purge container 2, the inlet and outlet of the trap 4, the second inert gas source 5, and the analytical unit are respectively connected to different ports of the first multi-way valve 6. When separating volatile organic compounds in the sample liquid, the first multi-way valve 6 connects the outlet of the purge container 2 with the inlet of the trap 4, allowing the inert gas leaving from the outlet at the top of the purge container 2 to enter the trap 4, thereby capturing the volatile organic compounds. When it is necessary to move the volatile organic compounds captured in the trap 4 to the detection system... During the detection process, the second inert gas source 5 is connected to the outlet of the trap 4 through the first multi-way valve 6, and the inlet of the trap 4 is connected to the analysis unit. At this time, the inert gas in the second inert gas source 5 enters the trap 4 through the outlet of the trap 4, and back-blowing the volatile organic compounds captured on the surface of the trap 4. Then, the inert gas leaves through the inlet of the trap 4 and enters the analysis unit for separation. The carrier is the inert gas entering the analysis unit. Then, it is detected by the detection system. Thus, the separation and detection of volatile organic compounds in the sample liquid are realized.

[0039] Specifically, the port of the first multi-way valve 6 is also connected to a venting branch. When the volatile organic compounds in the sample liquid are purged by the first inert gas source 3, the inert gas enters the trap 4 through the inlet of the trap 4 and then leaves the trap 4 through the outlet. At this time, the first multi-way valve 6 connects the outlet of the trap 4 with the venting branch to discharge the waste inert gas leaving the outlet of the trap 4.

[0040] Furthermore, a water removal trap 15 is provided between the purge container 2 and the trap 4. When the inert gas from the first inert gas source passes through the sample liquid in the purge container 2, the inert gas will carry moisture. The water removal trap 15 can remove a large amount of moisture from the inert gas.

[0041] like Figure 1 As shown, the second processing unit includes an extraction container 7 and an extraction element 8. The extraction container 7 is connected to the purge container 2, so that the sample liquid in the purge container 2 can be transferred to the extraction container 7. The extraction element 8 is located in the extraction container 7 and is used to adsorb semi-volatile organic compounds in the extracted sample liquid.

[0042] Solid-phase extraction is used to separate semi-volatile organic compounds (SOCs) in a sample solution. Specifically, the sample solution is first collected into a purge container 2 using an inlet pump. Then, by pressurizing the purge container 2, the sample solution moves to an extraction container 7. The extraction element 8 in the extraction container 7 adsorbs the SOCs in the sample solution, thus achieving the separation of SOCs. By using both purge collection and solid-phase extraction as pretreatment methods, the volatile and semi-volatile organic compounds in the sample solution can be separated. Depending on the type of organic compound being detected, the two pretreatment methods can be selected simultaneously or separately to process the sample solution, thereby increasing the detection range and applicability of the detection device.

[0043] Furthermore, the extraction container 7 is equipped with a heating component and a stirring component for heating and stirring the sample liquid inside the extraction container 7. When the semi-volatile organic compounds in the sample liquid are adsorbed by the extraction element 8, the heating component can heat the sample liquid in the extraction container 7, and the stirring component can stir the sample liquid in the extraction container 7, which can improve the extraction efficiency and speed up the overall extraction process.

[0044] Furthermore, the extraction container 7 is equipped with a robotic arm assembly 9, which is used to hold the extraction element 8 so that the extraction element 8 can enter or leave the extraction container 7 and the analysis unit. After the extraction element 8 adsorbs a certain amount of semi-volatile organic compounds in the sample solution, it needs to be moved to the analysis unit. The analysis unit separates the semi-volatile organic compounds adsorbed on the extraction element 8. At this time, the carrier is the extraction element 8. By holding and moving the extraction element 8 with the robotic arm assembly 9, the extraction element 8 can automatically enter or leave the extraction container 7 and the analysis unit, thereby improving the overall automation level of the device.

[0045] Specifically, the robotic arm component 9 is a conventional technology in this field, and will not be elaborated on here.

[0046] like Figure 2-3 As shown, the analytical unit includes an analytical tube 10, and the detection system includes a gas chromatography column oven 11 and a mass spectrometer 12. The analytical tube 10, the gas chromatography column oven 11, and the mass spectrometer 12 are connected in sequence. During purge and trap or solid-phase extraction, the inert gas carrying volatile organic compounds or the extraction element 8 carrying semi-volatile organic compounds will enter the analytical tube 10. The semi-volatile organic compounds are separated by the analytical tube 10, and then the volatile organic compounds or semi-volatile organic compounds will enter the gas chromatography column oven 11 and the mass spectrometer 12 in sequence for joint detection by chromatography and mass spectrometry.

[0047] like Figure 3As shown, the second inert gas source 5 is also connected to the parsing tube 10. The second inert gas source 5 is connected to the first multi-way valve 6 and the parsing tube 10 by two branches. When the inert gas in the second inert gas source 5 back purges the trap 4, the inert gas in the two branches will eventually gather in the parsing tube 10, which will pressurize the parsing tube 10, so that volatile organic compounds can quickly gather at the front end of the gas chromatography column oven 11 and enter the gas chromatography column oven 11, thereby reducing the dead volume.

[0048] like Figure 1 As shown, the first inert gas source 3 is also connected to the first multi-way valve 6, and a gas resistance 13 is provided between the first inert gas source 3 and the first multi-way valve 6. Before or after the separation of volatile organic compounds, the inert gas in the first inert gas source 3 can be used to clean the purge container 2, the trap 4, and the pipeline connecting the purge container 2 and the trap 4. The first inert gas source 3 is directly connected to the outlet of the trap 4 through the first multi-way valve 6, and the inlet of the trap 4 is connected to the outlet of the purge container 2. During operation, the inert gas in the first inert gas source 3 enters the trap 4 through the outlet of the trap 4 after being controlled by the gas resistance 13, and then leaves the trap 4 through the inlet of the trap 4 and enters the purge container 2. Finally, it leaves the purge container 2 through the exhaust branch connected to the purge container 2, thereby cleaning the purge container 2, the trap 4, and the pipeline, preventing residual gas in the purge container 2, the trap 4, and the pipeline, and improving the accuracy of detection.

[0049] like Figure 1 As shown, the water organic matter detection device also includes a second multi-port valve 14. The first inert gas source 3, the second inert gas source 5, the gas chromatography column oven 11, and the analytical tube 10 are respectively connected to different ports of the second multi-port valve 14. Similarly, before or after the detection of volatile organic compounds, the first inert gas source 3 and the second inert gas source 5, the gas chromatography column oven 11, the mass spectrometer 12, and the pipelines connecting them can be cleaned. During operation, the second multi-port valve 14 connects the first inert gas source 3 to the analytical tube 10 and the second inert gas source 5 to the gas chromatography column oven 11. The inert gas in the first inert gas source 3 cleans the analytical tube 10, and the inert gas in the second inert gas source 5 cleans the gas chromatography column oven 11 and the mass spectrometer 12, preventing residual gas in the analytical tube 10, the gas chromatography column oven 11, the mass spectrometer 12, and the pipelines connecting them, thereby improving the accuracy of the detection.

[0050] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A device for detecting organic matters in water, comprising a sample processing system, a resolving unit and a detecting system, characterized in that: the sample processing system comprises a liquid inlet assembly (1), a purging container (2), a first processing unit and a second processing unit, the outlet of the liquid inlet assembly (1) is communicated with the purging container (2) to deliver sample liquid into the purging container (2), the first processing unit is communicated with the purging container (2) to separate volatile organic matters in the sample liquid in the purging container (2) from the sample liquid, and the second processing unit is communicated with the purging container (2) to separate semi-volatile organic matters in the sample liquid in the purging container (2) from the sample liquid; the first processing unit and the second processing unit are both communicated with the detecting system through the resolving unit, so that the volatile organic matters or semi-volatile organic matters separated from the sample liquid enter the detecting system for detection, and the resolving unit is used for separating the semi-volatile organic matters from a carrier. The first processing unit comprises a first inert gas source (3) and a trapping trap (4), the first inert gas source (3) is communicated with the gas inlet of the purging container (2), and the trapping trap (4) is communicated with the gas outlet of the purging container (2), so that the volatile organic matters in the sample liquid are purged into the trapping trap (4) by the inert gas to realize the separation of the volatile organic matters in the sample liquid. The first processing unit further comprises a second inert gas source (5) and a first multi-way valve (6), the gas outlet of the purging container (2), the gas inlet and the gas outlet of the trapping trap (4), the second inert gas source (5) and the resolving unit are respectively connected to different ports of the first multi-way valve (6).

2. The device for detecting organic matter in water according to claim 1, characterized in that: The second processing unit comprises an extraction container (7) and an extraction element (8), the extraction container (7) is communicated with the purging container (2), so that the sample liquid in the purging container (2) can be transferred into the extraction container (7), and the extraction element (8) is located in the extraction container (7) and used for adsorbing semi-volatile organic matters in the extracted sample liquid.

3. The apparatus for detecting organic substances in water according to claim 2, wherein: The extraction container (7) is provided with a heating assembly and a stirring assembly for heating and stirring the sample liquid in the extraction container (7).

4. The device for detecting organic matter in water according to claim 2, characterized in that: The extraction container (7) is provided with a mechanical arm assembly (9), and the mechanical arm assembly (9) is used for clamping the extraction element (8) to realize the entry or exit of the extraction element (8) into or out of the extraction container (7) and the resolving unit.

5. The apparatus for detecting organic substances in water according to claim 4, wherein: The resolving unit comprises a resolving tube (10), the detecting system comprises a gas chromatography column box (11) and a mass spectrometer (12), and the resolving tube (10), the gas chromatography column box (11) and the mass spectrometer (12) are sequentially connected.

6. The apparatus for detecting organic substances in water according to claim 4, wherein: The second inert gas source (5) is also communicated with the resolving tube (10).

7. The device for detecting organic substances in water according to claim 3, characterized in that: The first inert gas source (3) is also connected to the first multi-way valve (6), and a gas resistance (13) is arranged between the first inert gas source (3) and the first multi-way valve (6).

8. The device for detecting organic substances in water according to claim 7, characterized in that: A second multi-way valve (14) is further included, and the first inert gas source (3), the second inert gas source (5), the gas chromatography column box (11) and the resolving tube (10) are respectively connected to different ports of the second multi-way valve (14).

9. The device for detecting organic substances in water according to claim 3, characterized in that: ​ 10. The apparatus for detecting organic substances in water according to claim 7, wherein: ​

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