Decomposition ionization device for food heavy metal detection

Abstract

The utility model discloses a decomposition ionization device for food heavy metal detection, which comprises an ionization detection component and a temperature control component, and the ionization detection component is positioned in the temperature control component; the temperature control assembly comprises an outer protection box; a heat preservation inner box is arranged in the outer protection box, and a cavity is formed between the heat preservation inner box and the outer protection box. High-temperature or normal-temperature air can be introduced into the cavity; the ionization detection assembly comprises an oxidation anode pool and a reduction cathode pool, graphite electrodes are arranged in the oxidation anode pool and the reduction cathode pool, and the graphite electrodes are jointly connected with a galvanometer. According to the utility model, a proper temperature can be ensured when metal ions are electrolyzed and enriched, and the migration speed of the metal ions is ensured.

Description

Technical Field

[0001] This utility model relates to the field of food engineering technology, specifically to a decomposition and ionization device for detecting heavy metals in food. Background Technology

[0002] Heavy metal contamination in food can originate from soil, water bodies, processing equipment, or packaging materials. Heavy metals such as lead, cadmium, and mercury are toxic and bioaccumulative, and long-term intake can cause serious harm to human health. Therefore, ensuring that the heavy metal content in food meets safety limits through scientific testing methods and strict regulatory standards is a crucial measure to protect public health.

[0003] There are various methods for detecting heavy metals in food, including atomic absorption spectrometry, electrochemical methods, chromatography, and immunoassay. Among them, the electrochemical method utilizes the current change generated by the redox reaction of metal ions on electrodes to detect metal ions. It can detect multiple metals and is suitable for rapid on-site detection. In actual operation, when enriching metal ions in an electrolytic cell, the temperature of the electrolytic cell affects the solution viscosity and the migration rate of metal ions. However, the temperature of the electrolytic cell used for metal ion enrichment in existing technologies is affected by the external environment, making it difficult to guarantee a suitable operating temperature and thus compromising the stability of the electrodeposition process. Utility Model Content

[0004] This invention aims to solve the technical problem mentioned above, where the temperature of the electrolytic cell used for metal ion enrichment in the prior art is affected by the external environment, and provides a decomposition and ionization device for detecting heavy metals in food.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is: a decomposition ionization device for detecting heavy metals in food, comprising an ionization detection component and a temperature control component, wherein the ionization detection component is located inside the temperature control component;

[0006] The temperature control component includes an outer protective box with an opening at the top and a sealing structure inside the opening; an insulated inner box is provided inside the outer protective box, and a cavity is formed between the insulated inner box and the outer protective box; high-temperature or room-temperature air can be introduced into the cavity;

[0007] The ionization detection component includes an oxide anode cell and a reduction cathode cell. Both the oxide anode cell and the reduction cathode cell are equipped with graphite electrodes, and the graphite electrodes are connected to a galvanometer.

[0008] Furthermore, the insulated inner box is made of insulating fiberglass board.

[0009] Furthermore, the upper end of the insulated inner box is provided with a recess; the sealing structure includes a rectangular notch on the outer protective box, into which a sealing cap is inserted, the lower end of the sealing cap is located on the recess of the inner box, and the outer side of the sealing cap is provided with a rubber layer.

[0010] Furthermore, the sealing cover is provided with a circular groove, and a limiting rod is provided in the circular groove.

[0011] Furthermore, a hot air blower is provided on one side of the outer protective box, the hot air blower is connected to a blower pipe and extends into the cavity, the blower pipe is connected to a cold air pipe through a tee fitting; the cavity is connected to an exhaust pipe extending out of the outer protective box.

[0012] Furthermore, valves are installed on both the blower pipe and the exhaust pipe.

[0013] Furthermore, the oxidation anode pool and the reduction cathode pool are internally connected by salt bridges.

[0014] The advantages of this utility model compared with the prior art are as follows:

[0015] By setting up an outer protective box and a cavity, a suitable temperature can be maintained during the electrolytic enrichment of metal ions. When the temperature is too low, high-temperature air is introduced, and when the temperature is too high, room-temperature air is introduced. The air in the cavity can also be extracted to slow down the convection and conduction of air and reduce heat loss, so that the temperature is suitable during the enrichment of metal ions and the migration speed of metal ions is guaranteed. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is the main perspective view of this utility model.

[0018] Figure 3 This is a schematic diagram of the ionization detection component of this utility model.

[0019] As shown in the figure: 1. Outer protective box, 2. Insulated inner box, 3. Sealing cover, 4. Circular groove, 5. Limiting rod, 6. Cavity, 7. Hot air blower, 8. Blower pipe, 9. Exhaust pipe, 10. Oxidation anode pool, 11. Reduction cathode pool, 12. Ammeter, 13. Graphite electrode, 14. Salt bridge. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings.

[0021] Example 1, in conjunction with Appendix Figure 1 , 2 A decomposition and ionization device for detecting heavy metals in food includes an ionization detection component and a temperature control component. The ionization detection component is located inside the temperature control component, and the temperature control component protects the ionization component from the outside and ensures its appropriate operating temperature.

[0022] The temperature control component includes an outer protective box 1 with an opening at the top and a sealing structure inside the opening. Specifically, the sealing structure includes a rectangular notch on the outer protective box 1 with a sealing cover 3 inserted into the notch, a recess at the top of the inner heat-insulating box 2, and the lower end of the sealing cover 3 located on the recess of the inner box 2, reducing directly exposed gaps and making the outer protective box 1 relatively sealed.

[0023] The outer side of the sealing cover 3 is provided with a rubber layer to improve the sealing performance; the sealing cover 3 is provided with a circular groove 4, and a limiting rod 5 is provided in the circular groove 4; the sealing cover 3 can be removed by hooking the limiting rod 5.

[0024] Combined with appendix Figure 2 The outer protective box 1 is equipped with an insulated inner box 2, which is made of insulating fiberglass board. It is insulating and resistant to high temperature and has good thermal insulation performance. A cavity 6 is formed between the insulated inner box 2 and the outer protective box 1.

[0025] High-temperature or room-temperature air can be introduced into the cavity 6; specifically, a hot air blower 7 is provided on one side of the outer protective box 1, the hot air blower 7 is connected to a blower pipe 8 and extends into the cavity 6, the blower pipe 8 is connected to a cold air pipe through a three-way fitting; the cavity 6 is connected to an exhaust pipe 9 extending out of the outer protective box 1; both the blower pipe 8 and the exhaust pipe 9 are equipped with valves.

[0026] In the above structure, when it is necessary to raise the ambient temperature during metal ion enrichment, the room temperature air in cavity 6 is first extracted by an external vacuum device, and the high temperature air generated by the hot air blower 7 is introduced to raise the temperature, which can accelerate the migration speed of metal ions and ensure work efficiency and enrichment effect; when the leaching step is required after the enrichment process is completed, the high temperature air in cavity 2 is exported, and room temperature air is introduced into the cavity through the cold air pipe and the blower pipe 8.

[0027] Combined with appendix Figure 2 , 3 The ionization detection assembly includes an oxidation anode cell 10 and a reduction cathode cell 11. Both the oxidation anode cell 10 and the reduction cathode cell 11 are equipped with graphite electrodes 13, and the graphite electrodes 13 are connected to a galvanometer 12. A salt bridge 14 is connected inside the oxidation anode cell 10 and the reduction cathode cell 11. In the above structure, during the enrichment process, metal ions accumulate on the electrode surface to form deposits. During the dissolution process, applying a reverse voltage can cause the deposited metal to be re-oxidized and dissolved, generating an oxidation current. Thus, by measuring the current-voltage curve, quantitative analysis of metal ions can be achieved.

[0028] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A decomposition and ionization device for detecting heavy metals in food, characterized in that: It includes an ionization detection component and a temperature control component, wherein the ionization detection component is located inside the temperature control component; The temperature control component includes an outer protective box (1), which has an opening at the top and a sealing structure inside the opening; an insulated inner box (2) is provided inside the outer protective box (1), and a cavity (6) is formed between the insulated inner box (2) and the outer protective box (1); high temperature or normal temperature air can be introduced into the cavity (6); The ionization detection assembly includes an oxide anode cell (10) and a reduction cathode cell (11). Both the oxide anode cell (10) and the reduction cathode cell (11) are provided with graphite electrodes (13), and the graphite electrodes (13) are connected to a galvanometer (12).

2. The decomposition and ionization device for detecting heavy metals in food according to claim 1, characterized in that: The insulated inner box (2) is made of insulated fiberglass board.

3. The decomposition and ionization device for detecting heavy metals in food according to claim 2, characterized in that: The upper end of the heat-insulating inner box (2) is provided with a recess; the sealing structure includes a rectangular notch on the outer protective box (1), a sealing cover (3) inserted into the notch, the lower end of the sealing cover (3) is located on the recess of the inner box (2), and a rubber layer is provided on the outer side of the sealing cover (3).

4. The decomposition and ionization device for detecting heavy metals in food according to claim 3, characterized in that: The sealing cover (3) is provided with a circular groove (4), and a limiting rod (5) is provided in the circular groove (4).

5. The decomposition and ionization device for detecting heavy metals in food according to claim 1, characterized in that: A hot air blower (7) is provided on one side of the outer protective box (1). The hot air blower (7) is connected to a blower pipe (8) and extends into the cavity (6). The blower pipe (8) is connected to a cold air pipe through a three-way fitting. An exhaust pipe (9) extending out of the outer protective box (1) is provided in the cavity (6).

6. The decomposition and ionization device for detecting heavy metals in food according to claim 5, characterized in that: Valves are provided on both the blower pipe (8) and the exhaust pipe (9).

7. The decomposition and ionization device for detecting heavy metals in food according to claim 1, characterized in that: The oxidation anode pool (10) and reduction cathode pool (11) are internally connected by a salt bridge (14).

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