Detection apparatus for novel environmental pollutants

Abstract

The utility model relates to a kind of novel environmental pollutant detection equipment, including mobile phase feeding assembly, sample feeding assembly, separation component and detection equipment, the mobile phase feeding assembly includes liquid reservoir and circulating air supply assembly;The liquid reservoir is used to store mobile phase;The air inlet of the circulating air supply assembly is above the liquid level of the liquid reservoir, and the gas outlet is below liquid level, for circulating delivery inert gas to the liquid reservoir, and then discharge the gas in the mobile phase in the liquid reservoir.The utility model mainly provides a kind of novel environmental pollutant detection equipment, based on circulating air supply assembly carries out circulating air supply, can reduce the dosage of degassing gas.

Description

Technical Field

[0001] This utility model relates to the field of environmental sanitation testing technology, and in particular to a novel device for detecting environmental pollutants. Background Technology

[0002] PFAS (per- and polyfluoroalkyl substances) are a diverse group of man-made chemicals used in various consumer and industrial products. PFAS are not easily broken down, and some types have been shown to accumulate in the environment and human bodies. Exposure to certain types of PFAS can have serious health effects. PFAS detection often employs liquid chromatography (LC). For example, utility model patent CN201335821Y discloses a modified liquid chromatography-tandem mass spectrometry (LC-MS / MS) method that removes gas from the mobile phase by introducing gas into the mobile phase into a reservoir. While this method achieves gas removal, it results in significant waste of gas used for degassing. These problems urgently need to be addressed. Utility Model Content

[0003] This utility model discloses a novel detection device for environmental pollutants, which aims to solve the technical problems existing in the prior art.

[0004] The present invention adopts the following technical solution:

[0005] This utility model provides a novel detection device for environmental pollutants, including a mobile phase feeding assembly, a sample injection assembly, a separation assembly, and a detection device. The mobile phase feeding assembly includes a liquid reservoir and a circulating gas supply assembly. The liquid reservoir is used to store the mobile phase. The air inlet of the circulating gas supply assembly is located above the liquid level in the liquid reservoir, and the air outlet is located below the liquid level. It is used to circulate inert gas into the liquid reservoir, thereby discharging the gas in the mobile phase inside the liquid reservoir.

[0006] In the novel environmental pollutant detection device of this utility model, the circulating gas supply component includes a circulating power component, an inlet pipe, a return pipe, and an adsorber; the circulating power component can store inert gas and provide power for gas circulation; one end of the inlet pipe is connected to the outlet of the circulating power component, and the other end is located in the reservoir; one end of the return pipe is located in the reservoir and is higher than the outlet of the inlet pipe, and the other end is connected to the inlet of the adsorber; the outlet of the adsorber is connected to the inlet of the circulating power component.

[0007] In the novel environmental pollutant detection device of this utility model, the circulating power component includes a telescopic cylinder, an air storage cylinder, and a piston; the air storage cylinder has a receiving cavity inside, and is provided with an air inlet and an air outlet communicating with the receiving cavity; the air inlet and the air outlet are respectively provided with one-way valves; the piston is disposed in the receiving cavity, can move within the receiving cavity, and slides and seals against the inner wall of the receiving cavity; the telescopic cylinder is located outside the air storage cylinder and is used to drive the piston to move.

[0008] The novel environmental pollutant detection device of this utility model also includes a pressure regulating valve; the pressure regulating valve is disposed on the return gas pipe and is used to adjust the pressure of the gas phase space in the liquid reservoir.

[0009] The novel environmental pollutant detection device of this utility model also includes an exhaust plate; the exhaust plate is disposed in the liquid reservoir and has an internal cavity structure, and has multiple exhaust holes connected to the cavity structure, and the cavity structure is connected to the exhaust port of the circulating air supply component.

[0010] In the novel environmental pollutant detection device of this utility model, the air outlet plate also has a flow channel; the flow channel runs through both sides of the top and bottom of the air outlet plate and is not connected to the cavity structure and the air outlet hole; in the pipeline connecting the air outlet plate to the air outlet of the circulating air supply component, at least the part near the air outlet plate is flexible.

[0011] In the novel environmental pollutant detection device of this utility model, the air outlet is located on the bottom surface of the air outlet plate.

[0012] In the novel environmental pollutant detection device of this utility model, the gas outlet plate is fitted with the inner wall of the liquid reservoir with a clearance.

[0013] In the novel environmental pollutant detection device of this utility model, the liquid storage container includes a bottle body and a cap body; the cap body is disposed on the bottle mouth of the bottle body, and forms a sealed cavity inside.

[0014] The novel environmental pollutant detection device of this utility model also includes a mobile phase control valve; the mobile phase control valve is installed on the mobile phase outlet pipeline of the liquid reservoir.

[0015] The technical solution adopted in this utility model can achieve the following beneficial effects:

[0016] This utility model mainly provides a new type of environmental pollutant detection device, which is based on circulating gas supply component to reduce the amount of degassed gas used. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below, forming part of this utility model. The illustrative embodiments of this utility model and their descriptions explain this utility model and do not constitute an improper limitation of this utility model. In the accompanying drawings:

[0018] Figure 1 This is a schematic diagram of the structure of a novel environmental pollutant detection device according to the present invention;

[0019] Figure 2 This is a schematic diagram of the mobile phase feeding assembly of this utility model;

[0020] Figure 3 This is a schematic diagram of the liquid storage device of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the circulating power unit of this utility model;

[0022] Figure 5 This is one of the structural schematic diagrams of the air outlet plate of this utility model;

[0023] Figure 6 This is the second schematic diagram of the air outlet plate of this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Mobile phase feed assembly; 11. Reservoir; 111. Bottle body; 112. Cap; 12. Circulating gas supply assembly; 121. Circulating power assembly; 1211. Telescopic cylinder; 1212. Gas storage tank; 1213. Piston; 122. Inlet pipe; 123. Return pipe; 124. Adsorber; 13. Pressure regulating valve; 14. Gas outlet plate; 141. Gas outlet; 142. Flow channel; 15. Mobile phase control valve. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. In the description of this utility model, it should be noted that the term "or" is generally used to include the meaning of "and / or," unless otherwise expressly stated otherwise.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or a magnetic connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, in the description of this application, the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, "a plurality of" means at least two, such as two, three, or more, unless otherwise explicitly specified.

[0028] Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] To address the problems existing in the prior art, this application provides a novel detection device for environmental pollutants.

[0030] like Figure 1 and Figure 2 As shown, a novel environmental pollutant detection device includes a mobile phase feed assembly 1, a sample injection assembly A, a separation assembly B, and a detection device C. The mobile phase feed assembly 1 includes a reservoir 11 and a circulating gas supply assembly 12. The reservoir 11 is used to store the mobile phase. The inlet of the circulating gas supply assembly 12 is located above the liquid level in the reservoir 11, and the outlet is located below the liquid level. It is used to circulate inert gas into the reservoir 11, thereby discharging the gas in the mobile phase inside the reservoir 11. The discharged gas will enter the circulating gas supply assembly 12 with the inert gas and participate in the circulation again. During the circulation degassing process, it should be ensured that the space inside the reservoir 11 is sealed except for the part connected to the circulating gas supply assembly 12 to prevent the leakage of circulating gas during operation. Specifically, the sample injection assembly A is used for sample injection, the separation assembly B is specifically a liquid chromatography column, and the detection device C is specifically a liquid chromatography analyzer. The specific structure can refer to existing equipment and is not limited here.

[0031] This utility model mainly provides a new type of environmental pollutant detection device, which is based on circulating gas supply component to reduce the amount of degassed gas used.

[0032] In some preferred embodiments, such as Figure 2 and Figure 3As shown, the circulating gas supply assembly 12 includes a circulating power assembly 121, an inlet pipe 122, a return pipe 123, and an adsorber 124. The circulating power assembly 121 can store inert gas and provide power for gas circulation. Optionally, the circulating power assembly 121 can be a circulating air pump or a cylinder, etc. One end of the inlet pipe 122 is connected to the outlet of the circulating power assembly 121, and the other end is located in the reservoir 11. One end of the return pipe 123 is located in the reservoir 11 and is higher than the outlet end of the inlet pipe 122, and the other end is connected to... The air inlet of the adsorber 124 is connected to the air inlet of the circulating power component 121. Based on the adsorber 124 removing water or degassed gas from the degassed circulating gas, the partial pressure of the gas to be removed in the circulating gas can be reduced, which is conducive to the smooth removal of the gas that has not been removed from the mobile phase during recirculation. Preferably, the adsorption packing material filled in the adsorber 124 can be molecular sieve, activated carbon, etc., and can be selected according to the type of gas to be removed in the mobile phase.

[0033] In some preferred embodiments, such as Figure 4 As shown, the circulating power assembly 121 includes a telescopic cylinder 1211, an air storage cylinder 1212, and a piston 1213. The air storage cylinder 1212 has a receiving cavity inside, and is provided with an air inlet and an air outlet communicating with the receiving cavity. One-way valves are respectively provided at the air inlet and the air outlet. The piston 1213 is disposed in the receiving cavity and can move within the receiving cavity, that is, move along the axial direction of the air storage cylinder 1212, and slide seals against the inner wall of the receiving cavity. The telescopic cylinder 1211 is located outside the air storage cylinder 1212 and is used to drive the piston 1213 to move. Based on the reciprocating air supply method of the telescopic cylinder 1211, intermittent air supply is achieved. When supplying air, the air supply pressure is high, which can further reduce the partial pressure of the gas to be discharged and promote gas discharge. When inhaling air, it can reduce the pressure of the gas phase space of the liquid reservoir 11, reduce the gas partial pressure, and further promote the discharge of gas in the mobile phase.

[0034] Preferably, the air inlet and air outlet are located on the same side of the piston 1213. When the telescopic cylinder 1211 extends, the one-way valve of the air outlet opens and the one-way valve of the air inlet closes to exhaust air. When the telescopic cylinder 1211 retracts, the one-way valve of the air outlet closes and the one-way valve of the air inlet opens to draw in air.

[0035] Preferably, the piston 1213 is slidably sealed to the inner wall of the receiving cavity by a sealing ring.

[0036] Preferably, such as Figure 2 As shown, it also includes a pressure regulating valve 13; the pressure regulating valve 13 is disposed on the return gas pipe 123 and is used to adjust the pressure of the gas phase space in the liquid reservoir 11; based on the setting of the pressure regulating valve 13, the pressure of the gas phase space in the liquid reservoir 11 can be controlled, thereby controlling the pressure of the circulating gas entering the liquid reservoir 11.

[0037] In some preferred embodiments, such as Figure 3 , Figure 5 and Figure 6 As shown, it also includes an exhaust plate 14; the exhaust plate 14 is disposed in the reservoir 11 and has an internal cavity structure, and has multiple exhaust holes 141 connected to the cavity structure, and the cavity structure is connected to the exhaust port of the circulating air supply component 12; the exhaust plate 14 with multiple exhaust holes 141 can improve the uniformity of the gas in the flowing phase entering the reservoir 11, thereby improving the removal effect of the gas to be discharged.

[0038] In some preferred embodiments, such as Figure 5 and Figure 6 As shown, the outlet plate 14 also has a flow channel 142; the flow channel 142 runs through the top and bottom sides of the outlet plate 14 and is not connected to the cavity structure and the outlet hole 141; in the pipeline connecting the outlet plate 14 to the outlet of the circulating air supply component 12, at least the part near the outlet plate 14 is flexible; based on this, when the circulating air supply component 12 supplies air, under the action of exhaust pressure, the outlet plate 14 can move in the flowing phase, thereby increasing the disturbance of the flowing phase and promoting gas removal.

[0039] Preferably, the vent 141 is located on the bottom surface of the vent plate 14; based on this, the vent plate 14 receives the greatest thrust, further enhancing the disturbance to the mobile phase and promoting gas removal.

[0040] Preferably, the air outlet plate 14 is fitted with the inner wall of the liquid reservoir 11 with a clearance; thus, when the circulating power assembly 121 supplies and draws air, the air outlet plate 14 rises and falls more smoothly.

[0041] In some preferred embodiments, such as Figure 3 As shown, the reservoir 11 includes a bottle body 111 and a cap 112; the cap 112 is disposed on the bottle mouth of the bottle body 111, forming a sealed cavity inside; specifically, the cap 112 is provided with through holes for inserting an air inlet pipe 122, an air return pipe 123 and a mobile phase outlet pipe, and each through hole is sealed to each pipe.

[0042] In some preferred embodiments, such as Figure 2 As shown, it also includes a mobile phase control valve 15; the mobile phase control valve 15 is provided on the mobile phase outlet line of the reservoir 11; thereby, it is possible to prevent the mobile phase in the reservoir 11 from being discharged during the gas supply process.

[0043] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of the present invention.

Claims

1. A novel apparatus for detection of environmental pollutants comprising a mobile phase feed assembly, a sample injection assembly, a separation assembly and a detection apparatus, characterized in that, The mobile phase feed assembly includes a liquid reservoir and a circulating gas supply assembly; The reservoir is used to store the mobile phase; The air inlet of the circulating gas supply component is located above the liquid level in the reservoir, and the air outlet is located below the liquid level. It is used to circulate inert gas into the reservoir and thereby discharge the gas in the flowing phase inside the reservoir.

2. The novel apparatus for detecting environmental pollutants as claimed in claim 1 wherein, The circulating air supply assembly includes a circulating power assembly, an air inlet pipe, an air return pipe, and an adsorber; The circulating power component can store inert gas and provide power for gas circulation; One end of the air inlet pipe is connected to the air outlet of the circulating power component, and the other end is located inside the liquid reservoir. One end of the return gas pipe is located inside the liquid reservoir and is higher than the outlet end of the inlet pipe, while the other end is connected to the inlet of the adsorber. The air outlet of the adsorber is connected to the air inlet of the circulating power component.

3. The novel apparatus for detecting environmental pollutants as claimed in claim 2 wherein, The circulating power assembly includes a telescopic cylinder, an air storage tank, and a piston; The gas storage cylinder has an internal cavity and is provided with an air inlet and an air outlet communicating with the cavity; the air inlet and the air outlet are each provided with a one-way valve; The piston is disposed within the receiving cavity, is movable within the receiving cavity, and slides and seals against the inner wall of the receiving cavity; The telescopic cylinder is located outside the air storage cylinder and is used to drive the piston to move.

4. The novel apparatus for detecting environmental pollutants as claimed in claim 2, wherein It also includes pressure regulating valves; The pressure regulating valve is installed on the return gas pipe and is used to adjust the pressure of the gas phase space inside the liquid reservoir.

5. The novel environmental pollutant detection device according to claim 1, characterized in that, It also includes the air vent plate; The air outlet plate is disposed in the liquid reservoir and has an internal cavity structure with multiple air outlet holes connected to the cavity structure. The cavity structure is connected to the air outlet of the circulating air supply component.

6. The novel environmental pollutant detection device according to claim 5, characterized in that, The air outlet plate also has a flow channel; The flow channel runs through both sides of the top and bottom of the air outlet plate, and is not connected to the cavity structure and the air outlet hole; The portion of the pipe connecting the air outlet plate to the air outlet of the circulating air supply component is flexible, at least in the part closest to the air outlet plate.

7. The novel apparatus for detecting environmental pollutants as claimed in claim 6 wherein, The air outlet is located on the bottom surface of the air outlet plate.

8. The novel apparatus for detecting environmental pollutants as claimed in claim 5 wherein, The vent plate is fitted with the inner wall of the liquid reservoir with a clearance.

9. The novel apparatus for detecting environmental pollutants as claimed in any one of claims 1 to 8 wherein, The liquid reservoir includes a bottle body and a cap body; The cap is disposed on the bottle opening of the bottle body, forming a sealed cavity inside.

10. The novel apparatus for detecting environmental pollutants as claimed in any one of claims 1 to 8 wherein, It also includes a mobile phase control valve; The mobile phase control valve is installed on the mobile phase outlet pipeline of the reservoir.

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