An integrated digestion method and system with multi-field synergistic enhancement

Abstract

The present invention discloses an integrated digestion method and system with multi-field collaborative enhancement. The integrated digestion method with multi-field collaborative enhancement includes: applying an electric field to an electro-digestion module to light up a light-emitting module and activate a photo-thermal module; injecting a water sample to be tested and an acid solution into a reaction chamber to activate a piezomagnetic module; the electro-digestion module electrolyzes the water sample to be tested to generate hydrogen peroxide, and the hydrogen peroxide is enriched in the photo-thermal module for Fenton-like oxidation; the photo-thermal module generates heat for thermal digestion and promotes Fenton-like oxidation; the piezomagnetic module generates a magnetic field to vibrate the water sample to be tested and promotes Fenton-like oxidation. The embodiments of the present application combine a microfluidic water sample digestion chip with various enhancement effects, and use a cross-digestion method with multiple reaction paths such as photocatalysis, photothermal catalysis, and photo-electric-assisted Fenton-like oxidation, thermal digestion, and magneto-induced microfluidic reaction digestion simultaneously or separately. The system is small in volume and convenient to carry, can shorten the digestion time, and improve the accuracy of detection.

Description

Technical Field

[0001] The present invention relates to the technical field of integrated digestion chips, and particularly relates to a multi-field collaborative enhanced integrated digestion method and system. Background Art

[0002] Microfluidic chips are emerging research technologies for operating liquids at the micron or even nanometer scale. The chips integrate microchannels with various functions, and these channels form different functional unit regions respectively, forming a small laboratory with clear division of labor.

[0003] Microfluidic chip technology can achieve the entire analysis process and target analysis within extremely small devices (usually a few square centimeters). In the field of water quality detection, the detection samples change rapidly, which puts higher requirements on the portability of detection equipment. In recent years, researchers have introduced microfluidic chip technology into water quality detection. However, during the process of water sample digestion, the detection data error caused by incomplete digestion has always been a difficulty in the application of microfluidic chips in the field of water quality detection. For example, during the detection of important water quality indicators such as total phosphorus, total nitrogen, and COD, microfluidics often leads to too large an error between the final detection result and the true value due to incomplete digestion.

[0004] Therefore, designing a digester that can more completely and rapidly digest water quality indicators is an urgent need in the field of microfluidic chip water quality detection. Summary of the Invention

[0005] The purpose of this application is to overcome the above technical deficiencies, and propose a multi-field collaborative enhanced integrated digestion method and system to solve the technical problems of too long water sample digestion time, too high required sample volume, and incomplete sample digestion in the existing water quality detection process.

[0006] To achieve the above technical purpose, this application adopts the following technical solutions:

[0007] In the first aspect, this application also provides a multi-field collaborative enhanced integrated digestion method, including the following steps:

[0008] Apply an electric field to the electro-digestion module to light up the light-emitting module and activate the photo-thermal module;

[0009] Inject the water sample to be tested and acid solution into the reaction chamber to activate the piezomagnetic module;

[0010] The electro-digestion module electrolyzes the water sample to be tested to generate hydrogen peroxide, and the hydrogen peroxide is enriched in the photo-thermal module for Fenton-like oxidation;

[0011] The photo-thermal module generates heat for thermal digestion and promotes Fenton-like oxidation;

[0012] The piezomagnetic module generates a magnetic field to vibrate the water sample to be measured, promoting Fenton-like oxidation.

[0013] In some embodiments of the present application, the digestion method further includes:

[0014] Putting iron-based amorphous microspheres into the reaction chamber;

[0015] Under the magnetic field action of the piezomagnetic module, the iron-based amorphous microspheres vibrate in the water sample to be measured.

[0016] In a second aspect, the present application provides an integrated digestion system with multi-field synergistic enhancement, which is applied to the integrated digestion method with multi-field synergistic enhancement described in any one of the embodiments in the first aspect, and includes a polymer polymerization module, a light-emitting module, an electro-digestion module, a piezomagnetic module, and a photothermal module:

[0017] A polymer polymerization module, the polymer polymerization module has a hollow cavity to form a reaction chamber;

[0018] A light-emitting module, the light-emitting module is located above the reaction chamber;

[0019] An electro-digestion module, the electro-digestion module includes a first conductive layer and a second conductive layer, and the first conductive layer and the second conductive layer are respectively located above and below the reaction chamber;

[0020] A piezomagnetic module, the piezomagnetic module is located below the reaction chamber; and

[0021] A photothermal module, the photothermal module covers the inner bottom surface of the reaction chamber.

[0022] In some embodiments of the present application, the polymer polymerization module includes a polydimethylsiloxane layer, and the polydimethylsiloxane layer is arranged on the same layer as the reaction chamber.

[0023] In some embodiments of the present application, an inlet end and an outlet end are respectively arranged at both ends of the reaction chamber, the inlet end is communicated with a water sample input channel and an acid solution input channel, and the outlet end is communicated with a water sample output channel.

[0024] In some embodiments of the present application, the electro-digestion module further includes a power supply, the negative electrode and the positive electrode of the power supply are respectively electrically connected to the first conductive layer and the second conductive layer, and the materials of the first conductive layer and the second conductive layer both include a conductive glass substrate.

[0025] In some embodiments of the present application, the light-emitting module includes a thin film light source, and the thin film light source is respectively electrically connected to the first conductive layer and the second conductive layer.

[0026] In some embodiments of the present application, the photothermal module includes a photothermal conversion material, a Fenton-like catalyst, and a coating carrier. The coating carrier is coated on the inner bottom surface of the reaction chamber, and the photothermal conversion material and the Fenton-like catalyst are uniformly distributed in the coating carrier.

[0027] In some embodiments of the present application, the piezomagnetic module includes a piezomagnetic material thin film, the piezomagnetic material thin film carries the polymer polymerization module, and iron-based amorphous microspheres are provided in the reaction chamber.

[0028] In some embodiments of the present application, a cover glass is further included. The cover glass, the light-emitting module, and the first conductive layer are stacked on top of each other above the reaction chamber in sequence from top to bottom. The piezomagnetic module and the second conductive layer are stacked on top of each other below the reaction chamber in sequence. The photothermal module covers the upper surface of the piezomagnetic module.

[0029] Compared with the prior art, the beneficial technical effects brought by the technical solution provided by the present application include:

[0030] By designing an integrated digestion system and method with multi-field synergistic enhancement in the embodiments of the present application, a combination of a microfluidic water sample digestion chip and various enhancement effects is produced, constituting a new method for rapid and complete digestion of water samples. At the same time or separately, multiple reaction path cross-digestion methods such as photocatalysis, photothermal catalysis, and photoelectric-assisted Fenton-like oxidation, thermal digestion, and magneto-induced microfluidic reaction digestion are used. Compared with the existing microfluidic digestion technology, this digestion device and method can utilize more digestion reaction paths simultaneously and have a synergistic effect, can realize rapid treatment of more substances in the field of microfluidic water quality detection, and shorten the water sample digestion time from several hours in the traditional method to within a few seconds. This system is small in volume and convenient to carry, can shorten the digestion time, ensure complete digestion of water samples, improve the accuracy of detection, and facilitate researchers to detect the content of various water sample indicators in the water body in real time. At the same time, it is convenient to change different enhancement effects according to needs, and has a wide adaptability. Description of the Drawings

[0031] In order to more clearly illustrate the technical solutions in the present application, the following will briefly introduce the drawings required for the embodiments:

[0032] Figure 1 is a flowchart of an integrated digestion method with multi-field synergistic enhancement provided by an embodiment of the present application;

[0033] Figure 2 is a schematic structural diagram of an integrated digestion system with multi-field synergistic enhancement provided by an embodiment of the present application;

[0034] Figure 3 is a top view schematic diagram of an integrated digestion system with multi-field synergistic enhancement provided by an embodiment of the present application.

[0035] Reference numerals:

[0036] 1 - Polymerization module, 2 - Light-emitting module, 3 - First conductive layer, 4 - Second conductive layer, 5 - Magnetostrictive module, 6 - Photo-thermal module, 7 - Cover glass;

[0037] 11 - Reaction chamber, 12 - Water sample input channel, 13 - Acid solution input channel, 14 - Water sample output channel. Detailed implementation manners

[0038] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0039] Those skilled in the art of the present technology can understand that in this specification, the term "including" is an open-ended expression, which means that there are the described features but does not exclude other features. The orientation terms "upper", "lower", "left", "right", etc. are exemplary directions based on the accompanying drawings. The features defined with "first" and "second" implicitly include one or more of such features. The singular form can also be used for the plural form. The meaning of "a plurality" is two or more. The terms "mounted", "connected" and "coupled" can be fixedly connected, detachably connected or integrally connected; they can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two components. In addition, "connection" can include wireless connection.

[0040] The objective of the present application is to overcome the above technical deficiencies, and propose an integrated digestion method and system with multi-field collaborative enhancement, so as to solve the technical problems of too long water sample digestion time, too high required sample volume, and incomplete sample digestion in the prior art during water quality detection.

[0041] To achieve the above technical objectives, the present application adopts the following technical solutions:

[0042] In a first aspect, the present application also provides an integrated digestion method with multi-field collaborative enhancement, as Figure 1 shown Figure 1 is a flowchart of an integrated digestion method with multi-field collaborative enhancement provided by an embodiment of the present application.

[0043] An integrated digestion method with multi-field collaborative enhancement includes the following steps:

[0044] S1. Apply an electric field to the electro-digestion module, turn on the light-emitting module 2, and activate the photo-thermal module 6;

[0045] S2. Inject the water sample to be measured and the acid solution into the reaction chamber 11 to activate the piezomagnetic module 5;

[0046] S3. The electro-digestion module electrolyzes the water sample to be measured to generate hydrogen peroxide, and the hydrogen peroxide is enriched in the photothermal module 6 for Fenton-like oxidation;

[0047] S4. The photothermal module 6 generates heat for thermal digestion and promotes Fenton-like oxidation;

[0048] S5. The piezomagnetic module 5 generates a magnetic field to vibrate the water sample to be measured, promoting Fenton-like oxidation.

[0049] In some embodiments of the present application, the digestion method further includes:

[0050] Put the iron-based amorphous microspheres into the reaction chamber 11;

[0051] Under the magnetic field action of the piezomagnetic module 5, the iron-based amorphous microspheres vibrate in the water sample to be measured.

[0052] In this embodiment, the following steps are included:

[0053] (1) Apply a DC electric field to the upper and lower conductive glasses, and the light source emits light;

[0054] (2) Inject the water sample to be measured and the acid solution from the input port and mix them in the microchannel to activate the piezomagnetic module 5;

[0055] (3) The mixed solution enters the reaction chamber 11, and the Fenton-like oxidation system, the magneto-hydrodynamic reaction system, the electro-chemical digestion system, and the thermal digestion system simultaneously perform water digestion. During the reaction process, the electro-chemical digestion participates in constructing the Fenton-like reaction system, and at the same time, under the action of the electric field, the hydrogen peroxide is enriched on one side of the catalytic material to promote the Fenton-like oxidation efficiency. The light generated by the thin-film light source will simultaneously stimulate the photothermal catalysis. The heat generated by it will not only perform thermal digestion but also promote the Fenton-like oxidation effect, and will also increase the pressure in the reaction chamber 11 to enhance the magneto-hydrodynamic reaction. The iron-based amorphous microspheres can be used as the catalyst for the Fenton-like reaction, and the micro-vibration generated by the magneto-hydrodynamic reaction will enhance the Fenton-like oxidation effect, enabling the water sample to be completely digested to the greatest extent;

[0056] (4) The digested water sample flows out from the output port through the output channel.

[0057] In a second aspect, the present application provides an integrated digestion system with multi-field synergistic enhancement, as Figure 2 and Figure 3 shown, Figure 2 is a schematic structural diagram of an integrated digestion system with multi-field synergistic enhancement provided by an embodiment of the present application; Figure 3It is a top view schematic diagram of an integrated digestion system with multi-field collaborative enhancement provided by an embodiment of the present application.

[0058] An integrated digestion system with multi-field collaborative enhancement, which is applied to the integrated digestion method with multi-field collaborative enhancement described in any one of the embodiments in the first aspect, includes a polymer polymerization module 1, a light-emitting module 2, an electro-digestion module, a piezomagnetic module 5, and a photothermal module 6:

[0059] The polymer polymerization module 1, the polymer polymerization module 1 has a hollow cavity to form a reaction chamber 11;

[0060] The light-emitting module 2, the light-emitting module 2 is located above the reaction chamber 11;

[0061] The electro-digestion module, the electro-digestion module includes a first conductive layer 3 and a second conductive layer 4, the first conductive layer 3 and the second conductive layer 4 are respectively located above and below the reaction chamber 11;

[0062] The piezomagnetic module 5, the piezomagnetic module 5 is located below the reaction chamber 11; and

[0063] The photothermal module 6, the photothermal module 6 covers the inner bottom surface of the reaction chamber 11.

[0064] In the embodiment of the present application, by designing an integrated digestion system and method with multi-field collaborative enhancement, a combination of a microfluidic water sample digestion chip and various enhancement effects is produced, forming a new method for rapid and complete digestion of water samples. At the same time or separately, multiple reaction path cross-digestion methods such as photocatalysis, photothermal catalysis, and electro-optical assisted Fenton-like oxidation, thermal digestion, and magneto-induced microfluidic reaction digestion are used. Compared with the existing microfluidic digestion technology, this digestion device and its method can utilize more digestion reaction paths simultaneously and have a synergistic effect, and can realize the rapid treatment of more substances in the field of microfluidic water quality detection, shortening the water sample digestion time from several hours in the traditional method to within a few seconds. This system is small in size and convenient to carry, can shorten the digestion time, ensure complete digestion of the water sample, improve the accuracy of detection, and is conducive to researchers to detect the content of various water sample indicators in the water body in real time. At the same time, it is convenient to change different enhancement effects according to needs, and has a wide adaptability.

[0065] In this embodiment, based on Fenton-like oxidation technology, photothermal conversion technology, electrochemical digestion technology, magneto-induced microfluidic reaction technology and microfluidic technology. To solve the problem of difficult water sample digestion in the existing microfluidic water quality detection technology. It includes a microfluidic chip main body and a digestion reaction chamber 11. An electric field can be applied to the reaction chamber 11 for electrochemical digestion, and at the same time, the light source inside the device is excited.

[0066] The reaction chamber 11 is coated with a photothermal conversion-Fenton-like material, which can form a Fenton-like reaction system with hydrogen peroxide generated by electrolysis to oxidize and digest the water sample; heat can be generated through the photothermal conversion mechanism to stimulate photocatalysis and photothermal catalytic digestion. There are iron-based amorphous microspheres in the reaction chamber 11, which can excite the piezomagnetic ceramic film by the water flow pressure in the reaction chamber 11 to generate a magnetic field to drive the microvibration of the microspheres, thereby enhancing the oxidation and digestion effect. Applying an electric field can also promote the Fenton-like reaction and thermal digestion, and can realize any combination and cross-digestion of multiple reaction paths in the microfluidic chip. The chip is designed to be miniaturized, facilitating integration with a micro-sensor, thus constituting a portable water quality detection device.

[0067] In some embodiments of the present application, the polymer polymerization module 1 includes a polydimethylsiloxane layer, and the polydimethylsiloxane layer is disposed on the same layer as the reaction chamber 11.

[0068] In some embodiments of the present application, an inlet end and an outlet end are respectively disposed at two ends of the reaction chamber 11. The inlet end is communicated with the water sample input channel 12 and the acid solution input channel 13, and the outlet end is communicated with the water sample output channel 14.

[0069] In this embodiment, the digestion reaction chamber 11 is disposed on the chip body and is used for digesting water quality indicators (such as total phosphorus, total nitrogen, chemical oxygen demand, etc.) in the sample water sample.

[0070] The digestion reaction chamber 11 is composed of a microchannel for inputting and outputting the water sample and acid solution and a rectangular reaction chamber 11. Optionally, the length, width and height of the reaction chamber 11 are 50 mm, 15 mm and 50 μm respectively, and the total volume is 375 μL. The inlet end of the reaction chamber 11 is connected to the microchannel inlet for inputting the mixed solution of the water sample and acid solution, and is used for adjusting the acidity of the water sample to support the Fenton-like reaction system. The outlet end is connected to the microchannel outlet for discharging the digested water sample. The height of the channel is 50 μm. It is tightly combined with other film layers.

[0071] In some embodiments of the present application, the electro-digestion module further includes a power supply. The negative electrode and the positive electrode of the power supply are respectively electrically connected to the first conductive layer 3 and the second conductive layer 4, and the materials of the first conductive layer 3 and the second conductive layer 4 both include a conductive glass substrate.

[0072] In this embodiment, the main body of the microfluidic chip is bonded by polydimethylsiloxane (PDMS) and a conductive glass substrate. The length and width of the conductive glass substrate are 3 cm and 2.5 cm respectively, and are tightly combined with the PDMS by ion bombardment to avoid generating bubbles and interfering with the experiment and accurate measurement.

[0073] The chip designed according to the reaction chamber is made into a mask plate, and SU8-50 negative photoresist is spin-coated on the surface for spin coating. Then, baking, exposure, and re-baking treatments are carried out respectively. After completion, the photoresist outside the microstructures is removed and the film is hardened to make the structure more robust.

[0074] Mix PDMS and curing agent in proportion and stir well until there are uniform small bubbles in the mixture. Pour a certain amount of the well-mixed PDMS onto the fabricated silicon wafer template, and place the flow cell mold at the corresponding position on the silicon wafer before pouring. Put it into the oven for heating and vacuum pumping. Remove the cured PDMS with microstructures and drill holes at the inlet of the test solution and acid solution in the microchannels. Deposit a layer of photothermal conversion-Fenton-like material on the pre-cleaned conductive glass (Indium Tin Oxide, ITO).

[0075] Put the PDMS, ITO conductive glass substrate, piezomagnetic material film, and quartz glass into a plasma cleaner for cleaning. After the cleaning is completed, bond each part, and align the photothermal conversion-Fenton-like material pre-coated on the surface of the piezomagnetic material film with the reaction chamber 11 part of the PDMS.

[0076] In some embodiments of the present application, the light-emitting module 2 includes a thin-film light source, and the thin-film light source is electrically connected to the first conductive layer 3 and the second conductive layer 4 respectively.

[0077] In this embodiment, the upper conductive glass substrate is connected to the negative pole of the external power supply, and the lower conductive glass substrate is connected to the positive pole of the external power supply. It is used to apply an electric field to the water sample to be digested for electrochemical digestion. Hydrogen peroxide is generated in the positive electrode region by electrolyzing water, which is equivalent to adding hydrogen peroxide to the mixed solution of the water sample and the acid solution and enriching it near the photothermal conversion-Fenton-like material coating to construct a Fenton-like reaction system. A thin-film light source is integrated directly above the reaction chamber 11, and the positive and negative poles of its power supply are respectively connected to the lower and upper conductive glasses and powered by the same power supply. It is used to apply light to the photothermal conversion-Fenton-like material coating, and is used to generate heat in the reactor by using the photothermal conversion mechanism, while promoting the Fenton-like reaction and thermally digesting the mixed solution of the water sample and the acid solution.

[0078] Bond a thin-film light source on the outside of the upper conductive glass as well, which is powered by direct current, and the positive and negative poles of its power supply are connected to the lower and upper conductive glasses through conductive silver paste. Insulating quartz glass should be bonded to the outside of the light source and the outside of the lower conductive glass.

[0079] In some embodiments of the present application, the photothermal module 6 includes a photothermal conversion material, a Fenton-like catalyst, and a coating carrier. The coating carrier is coated on the inner bottom surface of the reaction chamber 11, and the photothermal conversion material and the Fenton-like catalyst are uniformly distributed in the coating carrier.

[0080] In this embodiment, the glass substrate area directly below the reaction chamber 11 is covered with a photothermal-Fenton-like material coating, with a thickness of approximately 500 nm and the same planar size as the reaction chamber 11, which is used for the synergistic digestion of water samples through photothermal-Fenton-like reactions. Iron-based amorphous microspheres are distributed on the above-mentioned coating.

[0081] It can be understood that the order of the film layers above and below the reaction chamber 11 is not limited in this embodiment, and the photothermal module 6 can be disposed on any film layer constituting the bottom surface of the reaction chamber 11.

[0082] In some embodiments of the present application, the piezomagnetic module 5 includes a piezomagnetic material thin film, the piezomagnetic material thin film bears the polymer polymerization module 1, and iron-based amorphous microspheres are provided in the reaction chamber 11.

[0083] In this embodiment, a piezomagnetic material thin film is provided below the reaction chamber 11, and a magnetic field is generated by using the water pressure in the reaction chamber 11, which is used to make the pre-placed iron-based amorphous microspheres in the reaction chamber 11 jump up and down for magneto-microfluidic reactions to digest the mixture.

[0084] In some embodiments of the present application, it further includes a cover glass 7. The cover glass 7, the light-emitting module 2, and the first conductive layer 3 are stacked on top of the reaction chamber 11 in sequence from top to bottom. The piezomagnetic module 5 and the second conductive layer 4 are stacked on the bottom of the reaction chamber 11 in sequence, and the photothermal module 6 covers the upper surface of the piezomagnetic module 5.

[0085] In this embodiment, the quartz glass is harder than PDMS, which can not only play a protective role but also enhance the pressure in the channel, making it easier to excite the magnetic field.

[0086] Compared with the prior art, the beneficial technical effects brought by the technical solution provided by the present application include:

[0087] The embodiment of the present application designs an integrated digestion system and method with multi-field synergistic enhancement, which produces a combination of a microfluidic water sample digestion chip and a variety of enhancement effects, forming a new method for rapid and complete digestion of water samples. A cross-digestion method using multiple reaction paths of photocatalysis, photothermal catalysis, and photoelectric-assisted Fenton-like oxidation, thermal digestion, and magneto-microfluidic reaction digestion is used simultaneously or separately. Compared with the existing microfluidic digestion technology, the digestion device and its method can simultaneously utilize more digestion reaction paths and have a synergistic effect, and can achieve rapid processing of more substances in the field of microfluidic water quality detection, shortening the water sample digestion time from the traditional hours to within a few seconds. The system is small and easy to carry, can shorten the digestion time, ensure the complete digestion of water samples, improve the accuracy of detection, and facilitate researchers to detect the content of various water sample indicators in water bodies in real time. At the same time, it is convenient to change different enhancement effects according to needs, and it has a wide adaptability.

[0088] Those skilled in the art will appreciate that the various operations, methods, steps, measures, and schemes in the processes discussed in this application may be alternated, modified, rearranged, decomposed, combined, or deleted.

[0089] The specific implementation methods of the present application described above do not constitute a limitation on the protection scope of the present application. Any other corresponding changes and modifications made according to the technical concept of the present application should be included in the protection scope of the claims of the present application.

Claims

1. An integrated digestion method with multi-field synergistic enhancement, characterized in that: The following steps are involved: Applying an electric field to the electric digestion module, lighting up the light-emitting module, and stimulating the photothermal module; The water sample and acid solution to be tested are injected into the reaction chamber to excite the piezomagnetic module; The electric digestion module electrolyzes the water sample to be tested to produce hydrogen peroxide, and the hydrogen peroxide is enriched in the photothermal module to perform Fenton-like oxidation; The photothermal module generates heat to perform thermal digestion and promote Fenton-like oxidation; The piezo-magnetic module generates a magnetic field to vibrate the water sample to be tested, thereby promoting Fenton-like oxidation; Wherein, the digestion method further comprises: placing iron-based amorphous microspheres into the reaction chamber; Under the action of the magnetic field of the piezomagnetic module, the iron-based amorphous microspheres vibrate in the water sample to be tested.

2. An integrated digestion system with multi-field synergistic enhancement, characterized in that: The integrated decomposition method for multi-field synergistic enhancement as claimed in claim 1 comprises: A polymer polymerization module, wherein the polymer polymerization module has a hollow cavity to form a reaction chamber; A light emitting module, the light emitting module is located above the reaction chamber; An electric digestion module, the electric digestion module comprising a first conductive layer and a second conductive layer, wherein the first conductive layer and the second conductive layer are respectively located above and below the reaction chamber; A piezomagnetic module, the piezomagnetic module is located below the reaction chamber; and A photothermal module, the photothermal module covers the inner side of the bottom surface of the reaction chamber; The piezomagnetic module comprises a piezomagnetic material film, the piezomagnetic material film carries the polymer module, and the reaction chamber is provided with iron-based amorphous microspheres.

3. The integrated digestion system with multi-field synergistic enhancement according to claim 2, characterized in that: The polymer module comprises a polydimethylsiloxane layer, and the polydimethylsiloxane layer is arranged on the same layer as the reaction chamber.

4. The integrated digestion system with multi-field synergistic enhancement according to claim 2, characterized in that: An inlet and an outlet are respectively arranged at two ends of the reaction chamber, the inlet is communicated with the water sample input channel and the acid solution input channel, and the outlet is communicated with the water sample output channel.

5. The integrated digestion system with multi-field synergistic enhancement according to claim 2, characterized in that: The electrical digestion module further includes a power supply, a negative electrode and a positive electrode of the power supply are electrically connected to the first conductive layer and the second conductive layer respectively, and the materials of the first conductive layer and the second conductive layer both include a conductive glass substrate.

6. The integrated digestion system with multi-field synergistic enhancement according to claim 5, characterized in that: The light emitting module includes a thin film light source, and the thin film light source is electrically connected to the first conductive layer and the second conductive layer respectively.

7. The integrated digestion system with multi-field synergistic enhancement according to claim 2, characterized in that: The photothermal module includes a photothermal conversion material, a Fenton-like catalyst and a coating carrier, wherein the coating carrier is coated on the inner side of the bottom surface of the reaction chamber, and the photothermal conversion material and the Fenton-like catalyst are evenly distributed in the coating carrier.

8. The multi-field synergistically enhanced integrated digestion system according to claim 2, characterized in that: It also includes a cover glass, wherein the cover glass, the light-emitting module, and the first conductive layer are stacked in sequence above the reaction chamber from top to bottom, the piezomagnetic module and the second conductive layer are stacked in sequence below the reaction chamber, and the photothermal module covers the upper surface of the piezomagnetic module.

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