Photochemical reaction atomization device and photochemical reaction equipment capable of improving signal intensity

Abstract

The utility model relates to the field of detection and analysis equipment, and provides a photochemical reaction atomization device and a photochemical reaction device that can improve signal intensity. The photochemical reaction atomization device includes a photochemical reaction chamber and a light source column. The photochemical reaction chamber is provided with an atomized sample inlet for communicating with an atomizer and a reaction atomized sample outlet for communicating with an analysis and detection device. The bottom of the photochemical reaction chamber is provided with a waste liquid diversion groove, which is annular. The side bottom of the waste liquid diversion groove is connected with a waste liquid outlet, and the light source column is inserted into the photochemical reaction chamber through the annular opening of the waste liquid diversion groove. The photochemical reaction atomization device provided by the utility model can save the space occupied by the photochemical reaction device, reduce the generation of ultraviolet light pollution, improve the atomization efficiency of metals in the solution, enhance the detection signal, reduce the signal volatility, and reduce the matrix interference, and can be used for the analysis and testing of trace metals in samples.

Description

Technical Field

[0001] The utility model relates to the field of detection and analysis equipment, and in particular to a photochemical reaction atomization device and a photochemical reaction equipment capable of improving signal intensity. Background Art

[0002] Metal element detection is an important technology in chemical analysis, which involves the qualitative and quantitative determination of various elements. In modern life and production, heavy metal element detection plays a vital role because heavy metals are highly toxic, difficult to metabolize, and easily enriched along the food chain.

[0003] There are many mature and stable methods for detecting heavy metal elements, including atomic absorption spectrometry, atomic fluorescence spectrometry, inductively coupled plasma emission spectrometry, inductively coupled atomic mass spectrometry, etc.

[0004] Atomic absorption spectroscopy (AAS) is a detection method based on atomic energy level transitions. At high temperatures, the metal elements in the sample are atomized, and then the content of the metal elements can be determined by measuring the degree of absorption of light of a specific wavelength.

[0005] Inductively coupled plasma atomic emission spectrometry (ICP-AES) is a detection method based on plasma emission spectroscopy. At high temperatures, the metal elements in the sample are excited into ions, and then the content of the metal elements is determined by measuring the degree of light emission at different wavelengths.

[0006] Inductively coupled plasma mass spectrometry (ICP-MS) is a detection method based on plasma mass analysis. At high temperatures, heavy metal elements in the sample are dissociated into charged atomic states, and then the content of heavy metal elements is determined by the number of ions with the same mass-to-charge ratio.

[0007] When using the above method for detection, the liquid sample containing heavy metal elements must be atomized and then passed into the flame of atomic absorption or inductively coupled plasma to convert the heavy metals in the sample into atomic state for spectral or mass spectrometric detection. However, this atomization method has low efficiency in heavy metal atomization, resulting in low signal, affecting the detection limit and sensitivity of the instrument; it is greatly affected by the sample matrix, resulting in signal deviation and affecting the accuracy of the instrument.

[0008] In order to improve the sensitivity and accuracy of the instrument, the utility model is specially proposed. Utility Model Content

[0009] The utility model aims to provide a photochemical reaction atomization device and a photochemical reaction equipment which can improve the signal intensity.

[0010] The embodiment of the utility model is achieved as follows:

[0011] In the first aspect, the utility model provides a photochemical reaction atomization device capable of improving signal strength, comprising a photochemical reaction chamber and a light source column, wherein the photochemical reaction chamber is provided with an atomized sample inlet and a reaction atomized sample outlet, wherein the atomized sample inlet is used to communicate with the atomizer to introduce the atomized sample into the photochemical reaction chamber, and the reaction atomized sample outlet is used to communicate with the analysis and detection device to introduce the reaction sample into the analysis and detection device for detection, and the bottom of the photochemical reaction chamber is provided with a waste liquid diversion groove for collecting the atomized sample to be re-condensed into liquid on the inner wall of the photochemical reaction chamber, the waste liquid diversion groove is annular, and the side bottom of the waste liquid diversion groove is connected to the waste liquid outlet, and the light source column is inserted into the photochemical reaction chamber through the annular opening of the waste liquid diversion groove.

[0012] In an optional embodiment, the inner diameter of the waste liquid diversion groove matches the diameter of the light source column, and the outer diameter of the waste liquid diversion groove matches the outer diameter of the bottom of the photochemical reaction chamber.

[0013] In an optional embodiment, the diameter of the light source column is 0.7-0.8 cm, the inner diameter of the waste liquid diversion groove is 0.7-0.8 cm, and the outer diameter of the waste liquid diversion groove is 1.4-1.5 cm.

[0014] In an optional embodiment, the photochemical reaction chamber includes an upper part, a middle part and a lower part connected in sequence, the middle part is cylindrical, the upper part is conical and the diameter of the upper part gradually decreases along the direction from the middle part to the upper part, and the lower part is conical and the diameter of the lower part gradually decreases along the direction from the middle part to the lower part.

[0015] In an optional embodiment, the atomized sample inlet is arranged in the middle part, the reactive atomized sample outlet is arranged in the upper part, the waste liquid diversion groove is arranged in the lower part, and the light source column is inserted from the annular opening of the waste liquid diversion groove and extends to the upper part.

[0016] In an optional embodiment, the minimum diameter of the lower outer portion is 1.4-1.5 cm, the diameter of the middle portion is 3-5 cm, the height of the light source column is 3-5 cm, and the sum of the heights of the waste liquid diversion groove and the photochemical reaction chamber is 4-6 cm.

[0017] In an optional embodiment, the light source column is a low-pressure mercury lamp.

[0018] In a second aspect, the utility model provides a photochemical reaction device, which includes a photochemical reaction atomization device capable of improving signal intensity, a nebulizer and an analysis and detection device as described in any of the aforementioned embodiments, wherein the nebulizer is connected to the atomized sample inlet of the photochemical reaction atomization device capable of improving signal intensity, and the analysis and detection device is connected to the reaction atomized sample outlet of the photochemical reaction atomization device capable of improving signal intensity.

[0019] In an optional embodiment, the analysis and detection device includes an atomic absorption spectrometer, an inductively coupled plasma emission spectrometer, an inductively coupled atomic mass spectrometer or an atomic fluorescence spectrometer.

[0020] In an optional embodiment, when the analysis and detection device is an atomic fluorescence spectrometer, the photochemical reaction equipment further includes a gas-liquid separator, and the gas-liquid separator is disposed between the photochemical reaction atomization device capable of enhancing signal intensity and the atomic fluorescence spectrometer.

[0021] The beneficial effects of the embodiments of the utility model are:

[0022] The photochemical reaction atomization device that can improve the signal strength provided by the utility model is provided by adding a light source column and a waste liquid diversion groove in the photochemical reaction chamber, wherein the atomized sample inlet of the photochemical reaction chamber is used to communicate with the atomizer to introduce the atomized sample into the photochemical reaction chamber, and the atomized sample swirls and rises with the carrier gas in the photochemical reaction chamber. During the swirl and rise process, the heavy metals in part of the atomized sample first undergo photochemical reaction to form a partial atomic state, and then enter the subsequent analysis and detection device with the carrier gas for detection. Part of the atomized sample is re-condensed into liquid on the inner wall of the photochemical reaction chamber and flows to the waste liquid diversion groove and is discharged from the photochemical reaction chamber. Among them, the light source column is arranged in the photochemical reaction chamber, and no external photochemical reactor is required, which reduces the space occupied by the equipment; the ultraviolet light source is surrounded by the atomized sample, which reduces the generation of ultraviolet light pollution; the scattering probability of light in the mist is increased, and the effective absorption is enhanced, which improves the utilization rate of the light source column and the photochemical efficiency, and the liquid phase solution is atomized to increase the gas-liquid interface, reduce the distance of gaseous metal escape, and inhibit the occurrence of reverse reaction. At the same time, the light source column will continue to excite the condensed liquid remaining on the inner wall of the photochemical reaction chamber, which is beneficial to improve the utilization rate of the spray sample, and the detection sensitivity is higher, which is suitable for the detection of liquid samples with low metal element content. The waste liquid diversion groove is provided to improve the stability of the reaction process by reducing the area of ​​the liquid excited by light and slowing down the fluctuation of the waste liquid outlet when it is discharged. The photochemical reaction atomization device that can improve the signal intensity provided by the utility model can improve the atomization efficiency of the metal in the solution and enhance the detection signal; on the other hand, some interferences in the sample matrix are decomposed under ultraviolet light excitation, which reduces the signal fluctuation caused by the matrix, and enhances the detection sensitivity and anti-interference ability of atomic absorption spectroscopy, inductively coupled plasma emission spectroscopy and inductively coupled atomic mass spectrometry, which can be used for the analysis and testing of trace metals in samples. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model 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 paying creative work.

[0024] Figure 1 A schematic diagram of the structure of a photochemical reaction atomization device capable of improving signal intensity provided by an embodiment of the utility model;

[0025] Figure 2 This is a schematic structural diagram of a photochemical reaction device provided in an embodiment of the utility model.

[0026] Icons: 100-photochemical reaction atomization device for improving signal intensity; 110-photochemical reaction chamber; 111-upper part; 112-middle part; 113-lower part; 114-atomized sample inlet; 115-reaction atomized sample outlet; 116-waste liquid diversion groove; 117-waste liquid outlet; 120-light source column.

[0027] 200 - photochemical reaction equipment; 210 - atomizer; 211 - liquid sample inlet; 212 - atomized sample outlet; 213 - carrier gas inlet; 220 - analysis and detection device. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0031] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0032] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0033] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected 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.

[0034] Example

[0035] Please refer to Figure 1 This embodiment provides a photochemical reaction atomization device 100 that can improve signal strength, which includes a photochemical reaction chamber 110 and a light source column 120.

[0036] Among them, the photochemical reaction chamber 110 is used to receive the atomized sample discharged from the atomizer 210. The atomized sample undergoes a photochemical reaction in the photochemical reaction chamber 110, thereby increasing the atomization rate of the metal element and entering the subsequent analysis and detection device 220 for detection. The light source column 120 is used to provide a light source for the atomized sample in the photochemical reaction chamber 110.

[0037] Specifically, the photochemical reaction chamber 110 includes an upper part 111, a middle part 112 and a lower part 113 which are connected in sequence. The middle part 112 is cylindrical, the upper part 111 is conical and the diameter of the upper part 111 gradually decreases along the direction from the middle part 112 to the upper part 111, and the lower part 113 is conical and the diameter of the lower part 113 gradually decreases along the direction from the middle part 112 to the lower part 113. The photochemical reaction chamber 110 is provided with an atomized sample inlet 114 and a reaction atomized sample outlet 115. The atomized sample inlet 114 is used to communicate with the atomizer 210 to introduce the atomized sample into the photochemical reaction chamber 110, and the reaction atomized sample outlet 115 is used to communicate with the analysis and detection device 220 to introduce the reaction sample into the analysis and detection device 220 for detection. The atomized sample inlet 114 is arranged in the middle so that the atomized sample can maintain an atomized state for a long time in the photochemical reaction chamber 110; the reaction atomized sample outlet 115 is arranged at the upper part to discharge the sample after the photochemical reaction and enter the subsequent analysis and detection device 220 for detection.

[0038] Furthermore, the bottom of the photochemical reaction chamber 110 is provided with a waste liquid diversion groove 116 for collecting the atomized sample to be re-condensed into liquid on the inner wall of the photochemical reaction chamber. Specifically, the waste liquid diversion groove 116 is provided at the lower part 113 of the photochemical reaction chamber 110. The waste liquid diversion groove 116 is annular and has a U-shaped cross section. The side bottom of the waste liquid diversion groove 116 is connected with a waste liquid outlet 117. Since the spray sample will re-condense into liquid when it contacts the inner wall of the photochemical reaction chamber 110, this will cause the injection time to reach a stable signal generation process to be prolonged. In this embodiment, by providing the waste liquid diversion groove 116, the gravitational potential energy of the spray sample to be condensed into liquid when it contacts the inner wall of the photochemical reaction chamber 110 can be greater. At the same time, the waste liquid diversion groove 116 can collect the condensed liquid to reduce the area of ​​the liquid that is excited by light, reduce the fluctuation of the signal, and thus improve the stability. At the same time, since the current waste liquid outlet 117 is often discharged through a peristaltic pump, and the intermittent discharge process of the peristaltic pump will cause fluctuations in the signal during the reaction process, the waste liquid diversion groove 116 provided in this embodiment can allow the spray sample to contact the inner wall of the photochemical reaction chamber 110 to condense and collect the unreacted part of the liquid. By providing the waste liquid diversion groove 116, the fluctuation of the waste liquid outlet 117 during discharge can be slowed down, thereby improving the stability of the reaction process.

[0039] Furthermore, due to the size changes of the photochemical reaction chamber 110 through the upper part 111, the middle part 112 and the lower part 113, the photochemical reaction chamber 110 presents a structure in which the middle part 112 is large and the upper part 111 and the lower part 113 gradually shrink, so that the atomized sample entering the photochemical reaction chamber 110 can be quickly gathered in the lower part 113 after condensing into liquid and enter the waste liquid diversion groove 116, and the atomized sample carried by the carrier gas is also easy to condense and fall when it contacts the upper part 111, so as to avoid the unreacted atomized sample being directly discharged from the reaction atomized sample outlet 115. The light source column 120 is a low-pressure mercury lamp. The light source column 120 is inserted into the photochemical reaction chamber 110 through the annular opening of the waste liquid diversion groove 116, and the part inserted into the photochemical reaction chamber 110 extends to the upper part 111 of the photochemical reaction chamber 110. Specifically, the inner diameter of the waste liquid diversion groove 116 matches the diameter of the light source column 120, and the outer diameter of the waste liquid diversion groove 116 matches the outer diameter of the bottom of the photochemical reaction chamber 110. "Matching" means that they can be connected in coordination with each other, for example, the diameter of the light source column 120 is 1-2 cm, the inner diameter of the waste liquid diversion groove 116 is 0.7-0.8 cm, and the outer diameter of the waste liquid diversion groove 116 is 1.4-1.5 cm. The minimum diameter of the outer portion of the lower portion 113 is 1.4-1.5 cm, the diameter of the middle portion 112 is 3-5 cm, the height of the light source column 120 is 3-5 cm, and the sum of the heights of the waste liquid diversion groove 116 and the photochemical reaction chamber 110 is 4-6 cm. In this embodiment, by arranging the light source column 120 in the photochemical reaction chamber 110, there is no need to connect an external photochemical reactor, which reduces the space occupied by the equipment; the ultraviolet light source is surrounded by the atomized sample, which reduces the generation of ultraviolet light pollution; the probability of light scattering in the mist increases, and the effective absorption is enhanced, which improves the utilization rate of the light source column and the photochemical efficiency. The liquid phase solution is atomized to increase the gas-liquid interface, reduce the distance for gaseous metal to escape, and inhibit the occurrence of reverse reaction. At the same time, the light source column 120 will continue to excite the condensed liquid remaining on the inner wall of the photochemical reaction chamber, which is conducive to improving the utilization rate of the spray sample, and the detection sensitivity is higher, which is suitable for the detection of liquid samples with low metal element content.

[0040] In this embodiment, by introducing the light source column 120, the light source column 120 can not only perform photochemical reaction with the spray sample in the photochemical reaction chamber 110, but also react with the condensed liquid on the inner wall of the photochemical reaction chamber 110. After the condensed liquid on the inner wall of the photochemical reaction chamber 110 is excited by the ultraviolet light source emitted by the light source column 120, the element to be measured in the condensed liquid will be converted into a gaseous state. Therefore, this embodiment improves the utilization rate of the sample injection through the light source column 120, thereby increasing the amount of the spray sample for photochemical reaction, which is beneficial to enhance the signal. In addition, in this embodiment, the light source column 120 is arranged in the photochemical reaction chamber 110. At this time, the utilization rate and photocatalytic efficiency of the light source column 120 will be improved, which is beneficial to better utilize the condensed liquid remaining on the inner wall of the photochemical reaction chamber 110. Therefore, this embodiment can detect liquid samples with low metal element content, and its detection sensitivity is higher.

[0041] The working principle of the photochemical reaction atomization device 100 that can improve the signal strength is: after the atomized sample enters the photochemical reaction chamber 110, it swirls and rises with the carrier gas in the photochemical reaction chamber 110. During the swirling and rising process, under the action of the light source column 120, some heavy metals in the atomized sample first undergo photochemical reactions to form partial atomic states, and then enter the subsequent analysis and detection device 220 with the carrier gas for detection. Part of the atomized sample re-condenses into liquid on the inner wall of the atomization chamber, and this part of the liquid will flow downward along the inner wall of the photochemical reaction chamber 110. During the spraying process and the process of flowing downward after condensing into liquid, the light source column 120 will continue to excite the condensed liquid remaining on the inner wall of the photochemical reaction chamber 110, and continue to generate gaseous metals, which is conducive to improving the utilization rate of the spray sample, further improving the signal, and having a higher detection sensitivity, and is suitable for detecting liquid samples with low metal element content. The spray sample will undergo a photochemical reaction under the irradiation of the ultraviolet light from the light source column 120, and the generated reaction sample will be discharged from the top of the photochemical reaction chamber 110 through the carrier gas, while the unreacted liquid enters the waste liquid diversion groove 116 for collection and is discharged through the waste liquid outlet 117.

[0042] Also, see Figure 2 This embodiment also provides a photochemical reaction device 200, which includes the above-mentioned photochemical reaction atomization device 100 that can improve signal intensity, a nebulizer 210 and an analysis and detection device 220, and the analysis and detection device 220 is connected to the reaction atomization sample outlet 115.

[0043] Among them, the atomizer 210 is used to atomize the liquid sample and pass the atomized atomized sample into the photochemical reaction chamber 110. In this embodiment, the atomizer 210 is a conventional structure. In this embodiment, a typical but non-limiting example is listed. The atomizer 210 is provided with a liquid sample inlet 211, an atomized sample outlet 212 and a carrier gas inlet 213. The atomized sample outlet 212 is inserted through the atomized sample inlet 114 to communicate with the photochemical reaction chamber 110. Specifically, the sample outlet of the atomizer 210 is connected to the middle part 112, which is used to realize the atomized atomized sample passing into the photochemical reaction chamber 110. The nozzle of the atomizer 210 at one end of the atomized sample outlet 212 is narrowed, and the atomized sample outlet 212 is tangential to the outer edge of the photochemical reaction chamber 110. The direction of the atomized sample outlet 212 is set so that the atomized sample sprayed from the atomized sample outlet 212 can minimize the re-condensation of the atomized sample on the inner wall of the photochemical reaction chamber 110, and the atomized sample will not directly contact the light source column 120 to avoid excessive exposure.

[0044] The analysis and detection device 220 includes but is not limited to an atomic absorption spectrometer, an inductively coupled plasma emission spectrometer, an inductively coupled atomic mass spectrometer or an atomic fluorescence spectrometer. When the analysis and detection device 220 is an atomic fluorescence spectrometer, the photochemical reaction device 200 also includes a gas-liquid separator, which is arranged between the photochemical reaction atomization device 100 and the atomic fluorescence spectrometer that can improve the signal intensity. In summary, the photochemical reaction atomization device 100 that can improve the signal intensity provided in this embodiment is provided by adding a light source column 120 and a waste liquid diversion groove 116 in the photochemical reaction chamber, wherein the atomized sample inlet 114 of the photochemical reaction chamber 110 is used to communicate with the atomizer 210 to pass the atomized sample into the photochemical reaction chamber 110, and the atomized sample swirls and rises with the carrier gas in the photochemical reaction chamber 110. During the swirling and rising process, the heavy metals in part of the atomized sample are first subjected to a photochemical reaction to form a partial atomic state, and then enter the subsequent analysis and detection device 220 with the carrier gas for detection. Part of the atomized sample is re-condensed into liquid on the inner wall of the photochemical reaction chamber 110 and flows to the waste liquid diversion groove 116 and is discharged from the photochemical reaction chamber 110. Among them, the light source column 120 is arranged in the photochemical reaction chamber 110, and no external photochemical reactor is required, which reduces the space occupied by the equipment; the ultraviolet light source is surrounded by the atomized sample, which reduces the generation of ultraviolet light pollution; the scattering probability of light in the mist increases, and the effective absorption is enhanced, which improves the utilization rate and photochemical efficiency of the light source column 120, and the liquid phase solution is atomized to increase the gas-liquid interface, reduce the distance of gaseous metal escape, and inhibit the occurrence of reverse reaction. At the same time, the light source column 120 will continue to excite the condensed liquid remaining on the inner wall of the photochemical reaction chamber 110, which is conducive to improving the utilization rate of the spray sample, and the detection sensitivity is higher, which is suitable for liquid samples with low metal element content. The waste liquid diversion groove 116 can be set to reduce the area of ​​the liquid excited by light and slow down the fluctuation of the waste liquid outlet when it is discharged, thereby improving the stability of the reaction process. The photochemical reaction atomization device 100 capable of improving signal intensity provided by the utility model can improve the atomization efficiency of metals in the solution and enhance the detection signal; on the other hand, some interferences in the sample matrix are decomposed under ultraviolet light excitation, which reduces the signal fluctuation caused by the matrix, enhances the detection sensitivity and anti-interference ability of atomic absorption spectroscopy, inductively coupled plasma emission spectroscopy and inductively coupled atomic mass spectrometry, and can be used for the analysis and testing of trace metals in samples.

[0045] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A photochemical reaction atomization device capable of improving signal intensity, characterized in that: It includes a photochemical reaction chamber and a light source column. The photochemical reaction chamber is provided with an atomized sample inlet and a reaction atomized sample outlet. The atomized sample inlet is used to communicate with an atomizer to pass the atomized sample into the photochemical reaction chamber. The reaction atomized sample outlet is used to communicate with an analysis and detection device to pass the reaction sample into the analysis and detection device for detection. A waste liquid diversion groove is arranged at the bottom of the photochemical reaction chamber for collecting the atomized sample to re-condense into liquid on the inner wall of the photochemical reaction chamber. The waste liquid diversion groove is annular, and the side bottom of the waste liquid diversion groove is connected to the waste liquid outlet. The light source column is inserted into the photochemical reaction chamber through the annular opening of the waste liquid diversion groove.

2. The photochemical reaction atomization device capable of improving signal intensity according to claim 1, characterized in that: The inner diameter of the waste liquid diversion groove matches the diameter of the light source column, and the outer diameter of the waste liquid diversion groove matches the outer diameter of the bottom of the photochemical reaction chamber.

3. The photochemical reaction atomization device capable of improving signal intensity according to claim 1, characterized in that: The diameter of the light source column is 0.7-0.8 cm, the inner diameter of the waste liquid diversion groove is 0.7-0.8 cm, and the outer diameter of the waste liquid diversion groove is 1.4-1.5 cm.

4. The photochemical reaction atomization device capable of improving signal intensity according to claim 1, characterized in that: The photochemical reaction chamber includes an upper part, a middle part and a lower part which are connected in sequence, the middle part is cylindrical, the upper part is conical and the diameter of the upper part gradually decreases along the direction from the middle part to the upper part, and the lower part is conical and the diameter of the lower part gradually decreases along the direction from the middle part to the lower part.

5. The photochemical reaction atomization device capable of improving signal intensity according to claim 4, characterized in that: The atomized sample inlet is arranged in the middle part, the reactive atomized sample outlet is arranged in the upper part, the waste liquid guide groove is arranged in the lower part, and the light source column is inserted from the annular opening of the waste liquid guide groove and extends to the upper part.

6. The photochemical reaction atomization device capable of improving signal intensity according to claim 5, characterized in that: The minimum diameter of the lower outer portion is 1.4-1.5 cm, the diameter of the middle portion is 3-5 cm, the height of the light source column is 3-5 cm, and the sum of the heights of the waste liquid diversion groove and the photochemical reaction chamber is 4-6 cm.

7. The photochemical reaction atomization device capable of improving signal intensity according to any one of claims 1 to 6, characterized in that: The light source column is a low-pressure mercury lamp.

8. A photochemical reaction device, characterized in that: It includes a photochemical reaction atomization device capable of improving signal intensity as described in any one of claims 1 to 7, a nebulizer and an analysis and detection device, wherein the nebulizer is connected to the atomized sample inlet of the photochemical reaction atomization device capable of improving signal intensity, and the analysis and detection device is connected to the reaction atomized sample outlet of the photochemical reaction atomization device capable of improving signal intensity.

9. The photochemical reaction device according to claim 8, characterized in that: The analysis and detection device includes an atomic absorption spectrometer, an inductively coupled plasma emission spectrometer, an inductively coupled atomic mass spectrometer or an atomic fluorescence spectrometer.

10. The photochemical reaction device according to claim 9, characterized in that: When the analysis and detection device is an atomic fluorescence spectrometer, the photochemical reaction equipment further comprises a gas-liquid separator, and the gas-liquid separator is arranged between the photochemical reaction atomization device capable of improving signal intensity and the atomic fluorescence spectrometer.

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