Solid-phase extraction, enrichment and gasification device

Abstract

The utility model discloses a solid-phase extraction, enrichment and gasification device. Comprising an extraction column; a cylindrical dosing chamber is arranged on the extraction column; a piston is arranged in the dosing chamber; a dosing hole and an exhaust hole are formed in the piston; the dosing hole is connected with a dosing pipe; the exhaust hole is connected with an exhaust pipe, and valves are arranged on the dosing pipe and the exhaust pipe. According to the utility model, liquid flows in a pressurized flow pushing manner, so that more compact extraction filler is allowed to be used, and solid-liquid contact is enhanced; piston flow pushing can be controlled at a constant speed, and the liquid outlet amount can be controlled.

Description

Technical Field

[0001] The utility model relates to a solid phase extraction enrichment gasification device. Background Art

[0002] Water quality testing can reasonably collect accurate and reliable water quality information of water bodies, so as to effectively prevent and deal with water quality problems. Among the water quality testing methods, except for a small number of water quality indicators whose testing methods are relatively simple, the testing of most water quality indicators requires complex processing. Among them, many water quality indicators need to be tested using gas detection instruments. From water samples to sample gas, extraction, enrichment and gasification are required. This series of steps is very cumbersome to complete manually, and efficient extraction and gasification devices should be developed.

[0003] Solid-phase extraction is more mainstream in extraction devices because it is easier to control than liquid-liquid extraction. There are many solid-phase extraction devices on the market, but most of them are relatively simple and have certain limitations in some cases: (1) Liquid can only pass through the extraction column by gravity, so the resistance of the solid-phase adsorption filler cannot be too large. On the one hand, the choice of filler is limited, and on the other hand, the contact between the filler and the liquid is not sufficient. (2) It does not have the ability to prepare quantitative samples. When connected to some gas detection equipment that does not have quantitative injection function, it is necessary to install additional quantitative injection equipment. Utility Model Content

[0004] In order to overcome the above problems, the utility model provides a solid phase extraction enrichment gasification device.

[0005] To achieve the above-mentioned purpose, the solid phase extraction enrichment gasification device of the utility model comprises an extraction column; a cylindrical dosing chamber is arranged on the extraction column; a piston is arranged in the dosing chamber; a dosing hole and an exhaust hole are opened on the piston; a dosing pipe is connected to the dosing hole; an exhaust pipe is connected to the exhaust hole, and valves are arranged on the dosing pipe and the exhaust pipe.

[0006] Furthermore, it also includes an inverted Y-shaped three-way valve;

[0007] The upper end of the inverted Y-shaped three-way valve is connected to the lower part of the extraction column;

[0008] The two ends of the lower part of the inverted Y-shaped three-way valve are respectively connected to a waste liquid collector and a gasification chamber;

[0009] Wherein, the inverted Y-shaped three-way valve is used to connect the extraction column with the waste liquid collector, or to connect the extraction column with the gasification chamber.

[0010] Furthermore, the upper end of the extraction column is connected to the pipeline at the lower end of the dosing chamber through a sealing plug; filter screens are respectively provided at the top and bottom of the extraction column, the top filter screen is clamped by the sealing plug and the gasket ring, and the bottom filter screen is naturally placed at the bottom.

[0011] Furthermore, a heating wire is wound outside the vaporization chamber.

[0012] Furthermore, a heat insulating sleeve is arranged outside the vaporization chamber, the electric heating wire and the upper end gas pipeline.

[0013] Furthermore, a gas detection device is connected to the gas pipeline at the upper end of the gasification chamber.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] (1) The solid phase extraction enrichment and high temperature gasification device of the utility model adopts a pressurized plug flow method to make the liquid flow, allowing the use of denser extraction fillers and strengthening solid-liquid contact.

[0016] (2) The utility model provides a solid phase extraction enrichment and high temperature gasification device, in which the piston flow can be controlled at a constant speed, the liquid output per unit time is known, and the sample preparation amount can be controlled.

[0017] (3) The utility model provides a solid phase extraction enrichment and high temperature gasification device, in which the power of the heating wire is adjustable, and can meet the gasification requirements of substances with different boiling points.

[0018] (4) The utility model provides a solid phase extraction enrichment and high temperature gasification device, and each component is easy to disassemble, assemble, clean and replace. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural schematic diagram of a solid phase extraction enrichment and high temperature gasification device of the utility model;

[0020] in:

[0021] 1——dosing chamber; 2——piston; 3——dosing tube; 4——exhaust pipe; 5——extraction column; 6——extraction column sealing plug; 7——extraction column top filter; 8——extraction column bottom filter; 9——filter gasket; 10——inverted Y-type three-way valve; 11——waste liquid collector; 12——vaporization chamber; 13——electric heating wire; 14——insulation sleeve; 15——detection equipment. DETAILED DESCRIPTION

[0022] The embodiments of the utility model are described in detail below with reference to the accompanying drawings.

[0023] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0024] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] The utility model aims to arrange a dosing chamber with a piston on an extraction column, which can push and pull the piston at a constant speed and move the piston to a specified height, thereby controlling the amount of liquid added and pushed.

[0027] like Figure 1 The solid phase extraction enrichment gasification device of the utility model shown comprises a drug adding chamber 1 , an extraction column 5 , an inverted Y-shaped three-way valve 10 , a waste liquid collector 11 , and a gasification chamber 12 .

[0028] The upper part of the dosing chamber is provided with a piston 2, and the piston has two holes, which are respectively connected to the dosing pipe 3 and the exhaust pipe 4.

[0029] The upper end of the extraction column is provided with a perforated sealing plug 6, which connects the dosing chamber and the extraction column. A filter ring 9 is fixed near the top of the extraction column, which is a ring-shaped interface with a gap. A filter 7 is sandwiched between the sealing plug and the filter ring, and a filter 8 is placed at the bottom of the extraction column.

[0030] The inverted Y-shaped three-way valve connects the lower end of the extraction column, the waste liquid collector, and the vaporization chamber. The three-way pipelines are in the same vertical plane and are 120 degrees to each other. Only two of the three-way pipelines can be connected.

[0031] The gasification chamber is wound with an electric heating wire 13, and the gasification chamber, the electric heating wire and the upper end gas pipeline are provided with a heat insulation sleeve 14. The upper end gas pipeline is externally connected to a gas detection device 15.

[0032] Steps:

[0033] Since the conditions such as the reagents used in solid phase extraction, the number of adsorption and analysis times, etc. depend on the specific method, it is impossible to give specific operations for these conditions, but their essence is to make the specified liquid flow through the solid filler. This description divides the solid phase extraction enrichment part into the dosing stage and the piston plug flow stage, which is suitable for adding any liquid such as water samples and organic solvents. The piston plug flow stage is further divided into the waste liquid collection stage and the sample collection stage; the high temperature gasification part is divided into the gasification stage and the non-gasification stage.

[0034] During the dosing stage, the inverted Y-type three-way valve connects the waste liquid collector and the vaporization chamber, that is, the extraction column is not connected; open the valves of the dosing pipe and the exhaust pipe. The entire dosing chamber and the extraction column are only connected to the outside by the dosing pipe and the exhaust pipe. The dosing pipe is connected to the liquid to be added, and the exhaust pipe is connected to the atmosphere. Move the piston to the specified height. Since the previous stage of dosing is usually the piston push flow of the previous cycle, the piston should normally be from low to high at this time, and there is a tendency to suck out the filler. The function of the filter at the top of the extraction column is to prevent suction. If the filler is not easy to be sucked out due to looseness or other reasons, the filter at the top of the extraction column can also be removed. Add the required liquid through the dosing pipe until there is no liquid left in the dosing chamber, and close the dosing pipe and the exhaust pipe valve. Since the piston height is specified, combined with the cross-sectional area of ​​the dosing chamber, the dosage can be determined.

[0035] During the piston push flow stage, the extraction column is connected to the waste liquid collector or the vaporization chamber by rotating the inverted Y-type three-way valve, and the dosing pipe and the exhaust pipe remain closed. Only the lower end of the entire dosing chamber and the extraction column is connected to the outside through the inverted Y-type three-way valve. The liquid will not flow out by itself and can only be pushed out by the piston. The piston can be pushed at a specified speed, that is, the flow rate is specified to meet different flow requirements. After the piston starts to push, the extraction column and the waste liquid collector are connected first. Due to certain reasons, such as the dosing chamber has not exhausted the gas, resulting in the gas being compressed, and the solid filler pores absorbing the liquid, the liquid flow rate may fluctuate and need to be stabilized for a period of time. After the liquid flow rate is stable, if you need to collect samples for vaporization, rotate the inverted Y-type three-way valve to connect the extraction column and the vaporization chamber, control the time, and control the sample preparation amount.

[0036] During the gasification stage, the inverted Y-shaped three-way valve connects the extraction column and the waste liquid collector, that is, it is not connected to the gasification chamber. The gasification is heated by the electric heating wire. The gas may enter the pipeline adjacent to the inverted Y-shaped three-way valve. Since this part of the pipeline is not insulated, the gas will condense and flow back to the gasification chamber for re-gasification.

[0037] The utility model is described in detail above in conjunction with the accompanying drawings, but the utility model is not limited to the above embodiments, and various changes can be made within the knowledge of ordinary technicians in the field without departing from the purpose of the utility model. Many other changes and modifications that do not depart from the concept and scope of the utility model should be considered as the protection scope of the utility model.

[0038] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0039] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A solid phase extraction enrichment gasification device, characterized in that: The invention comprises an extraction column; a cylindrical dosing chamber is arranged on the extraction column; a piston is arranged in the dosing chamber; a dosing hole and an exhaust hole are opened on the piston; a dosing pipe is connected to the dosing hole; an exhaust pipe is connected to the exhaust hole, and valves are arranged on the dosing pipe and the exhaust pipe.

2. The solid phase extraction enrichment gasification device according to claim 1, characterized in that: Also included is an inverted Y-type three-way valve; The upper end of the inverted Y-shaped three-way valve is connected to the lower part of the extraction column; The two ends of the lower part of the inverted Y-shaped three-way valve are respectively connected to a waste liquid collector and a gasification chamber; Wherein, the inverted Y-shaped three-way valve is used to connect the extraction column with the waste liquid collector, or to connect the extraction column with the gasification chamber; or to connect the waste liquid collector with the gasification chamber.

3. The solid phase extraction enrichment gasification device according to claim 1, characterized in that: The upper end of the extraction column is connected to the pipeline at the lower end of the dosing chamber through a sealing plug; filter screens are respectively arranged at the top and bottom of the extraction column, the top filter screen is clamped by the sealing plug and the gasket ring, and the bottom filter screen is naturally placed at the bottom.

4. The solid phase extraction enrichment gasification device according to claim 2, characterized in that: The gasification chamber is wound with an electric heating wire.

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