A device for eliminating interference in the determination of gas-phase molecular absorption spectrum

Abstract

The utility model discloses a kind of interference elimination devices for gas phase molecular absorption spectrometry, including bottom plate, the bottom plate upper end is provided with the heating mechanism for heating evaporation to remove interference, the heating mechanism includes heating pot, heating bin, the bottom plate upper end is provided with heating pot, the heating pot upper end is provided with heating bin, the bottom plate one side is provided with side plate, the surface of side plate is provided with the extraction mechanism for extracting target to carry out impurity removal, the extraction mechanism includes extraction bin, piston, first check valve, second check valve, extraction pipe, discharge pipe, the surface of side plate is fixedly provided with extraction bin, the piston is movably clamped in the inside of extraction bin, the surface of extraction bin upper end is fixedly provided with first check valve. The utility model has good use effect, condensing mechanism of traditional distillation to remove interference device is dispensed with to improve impurity removal condensing efficiency, target steam evaporation speed can also be improved simultaneously, so as to can significantly improve the use efficiency of the device.

Description

Technical Field

[0001] This utility model relates to the technical field of interference elimination devices, specifically an interference elimination device for gas phase molecular absorption spectrometry determination. Background Technology

[0002] Gas phase molecular absorption spectrometry (GMS) is an analytical method based on the principle of selective absorption of light by molecules of the analyte at specific wavelengths. It determines the content of a component by measuring the degree of light absorption by gaseous molecules. This method is mainly used to determine various inorganic and organic components in environmental and biological samples such as water, soil, food, and industrial wastewater. GMS quantitatively analyzes components by measuring the absorption of light by gaseous molecules at specific wavelengths. However, different molecules or different vibrational / rotational energy levels of the same molecule may absorb light at similar wavelengths, leading to spectral overlap.

[0003] Therefore, interference elimination is required during detection. Existing technologies offer various methods for this, such as purging the sample with an inert gas (e.g., N2) to remove volatile interfering substances, or using evaporation based on differences in boiling points to remove volatile interfering substances. This application primarily focuses on improving the equipment used in this distillation method. However, existing distillation-based interference removal devices are cumbersome when processing multi-solution mixtures (e.g., containing 4-5 components simultaneously), requiring a vaporization-condensation cycle to separate components with small boiling point differences. The condensation and collection steps are also cumbersome. Therefore, an improved interference elimination device for gas-phase molecular absorption spectrometry is needed to address this issue. Utility Model Content

[0004] The purpose of this invention is to provide an interference elimination device for gas phase molecular absorption spectroscopy to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an interference elimination device for gas phase molecular absorption spectroscopy, comprising a base plate, a heating mechanism for heating and evaporating to eliminate interference being provided at the upper end of the base plate, the heating mechanism including a heating pot and a heating chamber, the heating pot being provided at the upper end of the base plate, the heating chamber being provided at the upper end of the heating pot, a side plate being provided on one side of the base plate, and an extraction mechanism for extracting target vapor for impurity removal being provided on the surface of the side plate, the extraction mechanism including an extraction chamber, a piston, a first one-way valve, a second one-way valve, an extraction tube, and a discharge tube, the extraction chamber being fixedly provided on the surface of the side plate, the piston being movably engaged inside the extraction chamber, the first one-way valve being fixedly provided at the upper end of the surface of the extraction chamber, the second one-way valve being fixedly provided on the surface of the extraction chamber at the lower end of the first one-way valve, the extraction tube being fixedly provided on the surface of the first one-way valve, the discharge tube being fixedly provided on the surface of the second one-way valve, and an electric push rod being fixedly provided on one side inside the extraction chamber, the movable end of the electric push rod being fixedly connected to the piston so that the electric push rod can drive the piston to move left and right.

[0006] Preferably, a threaded connector is provided between the extraction tube and the heating chamber, and the threaded connector is screwed onto the upper end of the heating chamber to achieve a sealed connection between the extraction tube and the heating chamber.

[0007] Preferably, a condenser is fixedly installed at one end of the discharge pipe. The condenser increases the contact time between the discharged steam and the external environment. By utilizing the natural heat exchange of the external environment, the steam discharged by this device can condense on its own, thus eliminating the need for a water-cooling mechanism. Taking ethanol as an example, this is only an example and does not mean that this device can only be used to eliminate interference from ethanol. The evaporation temperature of ethanol at normal pressure is 78.32°C. When the gas pressure inside the heating chamber is low, such as only 20% of the pressure, evaporation can usually be achieved in the range of 40°C to 50°C. However, when ethanol is squeezed into the condenser through the extraction chamber, the gas pressure returns to normal, and the steam quickly returns to its boiling point of 78.32°C. But at this time, the steam is only 40°C to 50°C, so it can be condensed quickly and finally collected by the collection cup. In this way, the impurity removal and condensation efficiency can be quickly completed, and the evaporation rate of the target steam can also be improved, thereby significantly improving the efficiency of this device.

[0008] Preferably, a collection cup is fixedly provided at the lower end of the condenser tube, which can be used to conveniently collect the discharged steam liquid after interference.

[0009] Preferably, the first one-way valve and the second one-way valve are internally fitted with sealing plugs, and the first one-way valve and the second one-way valve are internally fitted with springs. The first one-way valve is connected to the inside of the extraction chamber through the extraction pipe, and the second one-way valve is connected to the inside of the discharge pipe through the extraction chamber. The direction of air flow can be controlled by the first one-way valve and the second one-way valve.

[0010] Preferably, a pressure gauge is fixedly installed on one side of the heating chamber surface. The pressure gauge can monitor the air pressure inside the heating chamber in real time, thereby making it easy to determine the evaporation temperature of the target liquid at this time; thus, it is easy to control the heating pot to heat the heating chamber to the target temperature.

[0011] Preferably, an external pipe is fixedly installed on one side of the heating chamber surface, and an electromagnetic valve is fixedly installed in the middle of the external pipe. An inert gas source can be easily connected through the external pipe. This gas source is not limited to a gas cylinder or other storage device. Finally, when the target liquid to be evaporated no longer continues to evaporate and the internal pressure of the heating chamber no longer changes, inert gas, such as nitrogen, can be introduced into the heating chamber through the external pipe to purge the heating chamber. At this time, the electric push rod continues to drive the piston to move repeatedly two to three times to continue to extract the target evaporated gas remaining in the heating chamber, thereby improving the removal effect of the device on the target evaporated gas.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This utility model eliminates the condensation mechanism of the traditional distillation and interference removal device to improve the impurity removal and condensation efficiency, and can also increase the evaporation rate of the target steam, thereby significantly improving the efficiency of the device.

[0014] 2. This utility model can be easily connected to an inert gas source through an external pipe. This gas source is not limited to a gas cylinder or other storage device. Finally, when the target liquid to be evaporated stops evaporating and the pressure inside the heating chamber no longer changes, inert gas, such as nitrogen, can be introduced into the heating chamber through the external pipe to purge the heating chamber. At this time, the electric push rod continues to drive the piston to move repeatedly two to three times to continue to extract the target evaporated gas remaining inside the heating chamber, thereby improving the removal effect of the device on the target evaporated gas. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of an interference elimination device for gas phase molecular absorption spectrometry according to the present invention.

[0016] Figure 2 This is a cross-sectional view of an interference elimination device for gas phase molecular absorption spectrometry according to the present invention;

[0017] Figure 3 This invention relates to an interference elimination device for gas phase molecular absorption spectrometry. Figure 2 A magnified view of point A in the middle.

[0018] In the diagram: 1. Base plate; 2. Heating pot; 3. Heating chamber; 4. Extraction chamber; 5. Piston; 6. First check valve; 7. Second check valve; 8. Extraction pipe; 9. Discharge pipe; 10. Threaded connector; 11. Condenser pipe; 12. Collection cup; 13. Sealing plug; 14. Spring; 15. Pressure gauge; 16. External pipe; 17. Solenoid valve; 18. Electric push rod. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-3 This utility model provides a technical solution: an interference elimination device for gas phase molecular absorption spectrometry determination, comprising a base plate 1, which serves as the supporting foundation of the device, with a heating mechanism mounted on its upper end. The heating mechanism includes a heating pot 2 and a heating chamber 3. The heating pot 2 is mounted on the upper end of the base plate 1, and the heating chamber 3 is placed on top of the heating pot 2. The heating pot 2 provides heat to the heating chamber 3, realizing the heating and evaporation operation of the material inside the heating chamber 3, thereby achieving the purpose of eliminating interference.

[0021] A side plate is provided on one side of the base plate 1, and an extraction mechanism is installed on the surface of the side plate. The extraction mechanism consists of an extraction chamber 4, a piston 5, a first one-way valve 6, a second one-way valve 7, an extraction pipe 8, a discharge pipe 9, and an electric push rod 18. The extraction chamber 4 is fixed to the surface of the side plate, and the piston 5 is movably engaged inside it. The first one-way valve 6 is fixed to the upper end of the surface of the extraction chamber 4, and the second one-way valve 7 is fixed to the lower end. The first one-way valve 6 is connected to the extraction pipe 8, and the second one-way valve 7 is connected to the discharge pipe 9. The electric push rod 18 is fixed inside the extraction chamber 4 on one side, and its movable end is connected to the piston 5. The extension and retraction of the electric push rod 18 drives the piston 5 to move left and right, realizing the extraction and discharge of gas.

[0022] The extraction tube 8 and the heating chamber 3 are sealed together by a threaded connector 10. The threaded connector 10 is screwed onto the upper end of the heating chamber 3 to ensure the airtightness between the extraction tube 8 and the heating chamber 3, prevent gas leakage from affecting the normal operation of the device, and also ensure that the extraction tube 8 and the heating chamber 3 can be disassembled as needed.

[0023] One end of the discharge pipe 9 is connected to the condenser pipe 11. The condenser pipe 11 increases the contact time between the discharged steam and the external environment, allowing the steam to condense naturally without the need for an additional water cooling system. Taking ethanol as an example (this is just an example and does not limit the device to eliminating ethanol interference), ethanol evaporates at 78.32℃ under normal pressure. When the internal pressure of the heating chamber 3 drops to 20% of the standard pressure, ethanol can evaporate within the range of 40℃ to 50℃. When the ethanol vapor is forced into the condenser pipe 11 through the extraction chamber 4, the pressure returns to normal, and the vapor quickly returns to its boiling point of 78.32℃, while the steam temperature is only 40℃ to 50℃, thus condensing rapidly. A collection cup 12 is fixedly installed at the lower end of the condenser pipe 11 to collect the condensed vapor liquid after interference removal.

[0024] The first one-way valve 6 and the second one-way valve 7 are internally engaged with the sealing plug 13 and equipped with a spring 14. The first one-way valve 6 is open from the extraction pipe 8 into the extraction chamber 4, and the second one-way valve 7 is open from the extraction chamber 4 into the discharge pipe 9. Through the design of the one-way valves, the flow direction of air and steam can be precisely controlled, ensuring the orderly progress of the extraction and discharge process.

[0025] A pressure gauge 15 is installed on one side of the heating chamber 3 to monitor the internal pressure in real time. Based on the pressure data, the evaporation temperature of the target liquid can be accurately determined, thus facilitating the control of the heating pot 2 to heat the heating chamber 3 to the target temperature and achieving precise control of the heating process. An external pipe 16 is installed on the other side of the heating chamber 3, with a solenoid valve 17 installed in the middle of the external pipe 16. An inert gas source (such as a gas cylinder or other storage device) can be connected through the external pipe 16. When the target liquid to be evaporated stops evaporating and the internal pressure of the heating chamber 3 stabilizes, inert gas (such as nitrogen) can be introduced into the heating chamber 3 through the external pipe 16 for purging. At this time, the electric push rod 18 continues to drive the piston 5 to move repeatedly two to three times to further extract the residual target evaporated gas in the heating chamber 3, improving the removal effect of the device on the target evaporated gas.

[0026] Working Principle: The operating principle of this device is as follows: By opening the threaded connector 10, the material to be removed for interference and impurities can be injected into the heating chamber 3. Then, the extraction pipe 8 and the heating chamber 3 are fixedly connected together through the threaded connector 10. At this time, heating is not performed. The electric push rod 18 is repeatedly contracted, and the piston 5 is used to extract the air from the heating chamber 3, so that the pressure inside the heating chamber 3 is only 20%. At this time, heating can be performed through the heating pot 2 and the heating chamber 3. Because the air pressure is low at this time, the target evaporation temperature can be reached with less heat and in a shorter time. Subsequently, as the target steam evaporates, the electric push rod 18 continues to drive the piston 5 to repeatedly move and extract the target steam. When the target steam is squeezed into the condenser tube 11 through the extraction chamber 4, the air pressure returns to normal, and the steam quickly returns to the boiling point of 78.32℃. However, at this time, the steam is only 40℃ to 50℃, so it can be quickly condensed. Finally, it is collected by the collection cup 12. In this way, the impurity removal and condensation efficiency can be quickly completed, and the evaporation rate of the target steam can also be improved, thereby significantly improving the efficiency of this device.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An interference elimination device for gas phase molecular absorption spectrometry, comprising a base plate (1), characterized in that: The upper end of the base plate (1) is provided with a heating mechanism for heating, evaporating and removing interference. The heating mechanism includes a heating pot (2) and a heating chamber (3). The upper end of the base plate (1) is provided with a heating pot (2), and the upper end of the heating pot (2) is provided with a heating chamber (3). A side plate is provided on one side of the base plate (1). The surface of the side plate is provided with an extraction mechanism for extracting target steam for impurity removal. The extraction mechanism includes an extraction chamber (4), a piston (5), a first one-way valve (6), a second one-way valve (7), an extraction pipe (8), and a discharge pipe (9). The extraction chamber (4) is fixedly provided on the surface of the side plate. A piston (5) is installed inside the chamber (4) and engages with it. A first one-way valve (6) is fixedly installed on the upper surface of the extraction chamber (4). A second one-way valve (7) is fixedly installed on the lower end of the first one-way valve (6) on the surface of the extraction chamber (4). An extraction tube (8) is fixedly installed on the surface of the first one-way valve (6). A discharge tube (9) is fixedly installed on the surface of the second one-way valve (7). An electric push rod (18) is fixedly installed on one side inside the extraction chamber (4). The movable end of the electric push rod (18) is fixedly connected to the piston (5) so that the electric push rod (18) can drive the piston (5) to move left and right.

2. The interference elimination device for gas phase molecular absorption spectrometry as described in claim 1, characterized in that: A threaded connector (10) is provided between the extraction tube (8) and the heating chamber (3). The threaded connector (10) is screwed onto the upper end of the heating chamber (3) to make the extraction tube (8) and the heating chamber (3) sealed together.

3. The interference elimination device for gas phase molecular absorption spectrometry as described in claim 1, characterized in that: A condenser pipe (11) is fixedly installed at one end of the discharge pipe (9).

4. The interference elimination device for gas phase molecular absorption spectrometry as described in claim 3, characterized in that: A collection cup (12) is fixedly installed at the lower end of the condenser tube (11).

5. The interference elimination device for gas phase molecular absorption spectrometry as described in claim 1, characterized in that: The first one-way valve (6) and the second one-way valve (7) are fitted with a sealing plug (13). The first one-way valve (6) and the second one-way valve (7) are fitted with a spring (14). The first one-way valve (6) is connected to the inside of the extraction chamber (4) through the extraction pipe (8). The second one-way valve (7) is connected to the inside of the discharge pipe (9) through the extraction chamber (4).

6. The interference elimination device for gas phase molecular absorption spectrometry as described in claim 1, characterized in that: A pressure gauge (15) is fixedly installed on one side of the surface of the heating chamber (3).

7. The interference elimination device for gas phase molecular absorption spectrometry as described in claim 1, characterized in that: An external pipe (16) is fixedly installed on one side of the surface of the heating chamber (3), and a solenoid valve (17) is fixedly installed in the middle of the external pipe (16).

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