High-frequency application guarantee system of new milk heavy metal detection chip

Abstract

The utility model discloses a novel milk heavy metal detection chip's high frequency application guarantee system relates to heavy metal detection technical field, and this system includes the cabinet body, and its inside is placed with a plurality of detection jar, mobile subassembly is set up in the inside of cabinet body, and can drive detection chip and move, and detect each detection jar in turn. Novel milk heavy metal detection chip's high frequency application guarantee system described in the utility model, because having adopted the cleaning cylinder with the cleaning tank as the cleaning structure of detection chip, and through the pipeline and two water pumps intercommunication, and one water pump is used to inject the cleaning liquid in the cleaning cylinder, another water pump then discharges the cleaning liquid from the cleaning cylinder outward, thereby forms the circulation of cleaning liquid, so as to keep the cleanness of cleaning liquid, therefore, effectively solved the existing heavy metal detection device when using, lack the stable cleaning structure and the technical problem of unstable operation of detection equipment, and then realized the circulation cleaning of detection chip.

Description

Technical Field

[0001] This utility model relates to the field of heavy metal detection technology, and in particular to a high-frequency application protection system for a novel milk heavy metal detection chip. Background Technology

[0002] Approximately 50% of China's surface water sources are polluted, with hundreds of organic compounds and heavy metal ions entering these sources. Meanwhile, groundwater also exceeds standards for fluoride, arsenic, iron, and manganese. Water containing heavy metal ions (cadmium, chromium, copper, mercury, nickel, etc.) can cause various diseases in humans when consumed, and some may even be carcinogenic. Heavy metal ion pollution in water is a source of heavy metal contamination in the aquatic environment. Cellulose, as a natural hydrophilic material, allows water-containing test samples to flow automatically under capillary action when dropped onto a paper chip, requiring no external driving device, making it an excellent microfluidic material. Microfluidic paper chips have a wide range of applications, playing a vital role in rapid diagnostics, food safety, and environmental monitoring. After nearly a decade of development, many processing methods for microfluidic paper chips have emerged, such as paper cutting, wax printing, and printing.

[0003] Currently, Chinese patent application number 202122231696.7 discloses a rapid detection device for heavy metals in milk, including a housing. Screws are movably connected to both sides of the housing's inner cavity via bearings. A chassis is fixedly connected to the bottom left side of the housing, and a motor is fixedly connected to the bottom of the chassis's inner cavity. A first transmission wheel is fixedly connected to the motor's output shaft, and a second transmission wheel is fixedly connected to the bottom surface of the screws. Existing heavy metal detection methods mostly rely on detection chips. While these can detect heavy metals in milk, residues from the previous test remain on the chip's surface after detection, leading to errors in subsequent tests. Furthermore, when milk solidifies on the chip's surface, the chip's detection function completely fails, severely affecting the accuracy and stability of the detection.

[0004] However, during the implementation of the above technical solution, at least the following technical problems were discovered:

[0005] The lack of a stable cleaning structure in existing heavy metal detection devices means that the liquid to be tested is placed under the detection chip, which is then inserted into the liquid for detection. However, milk residue from the previous test remains on the chip after the initial test, leading to errors in subsequent tests. Furthermore, when milk covers and solidifies on the chip surface, the detection function becomes completely ineffective, severely impacting the accuracy and stability of the detection. Current solutions involve manual cleaning or immersion in water, but these methods have significant limitations. One is poor stability; whether done manually or directly immersed in water, the lack of direct detection and analysis introduces uncertainty, as residue remains on the chip surface. Moreover, these methods, relying on immersion and manual tilting, require substantial time and effort. Therefore, we propose a novel high-frequency application assurance system for milk heavy metal detection chips. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] To address the shortcomings of existing technologies, this utility model provides a high-frequency application protection system for a novel milk heavy metal detection chip, solving the technical problems of existing heavy metal detection devices lacking a stable cleaning structure and exhibiting unstable operation.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] A high-frequency application protection system for a novel milk heavy metal detection chip, comprising:

[0011] The cabinet contains multiple testing containers.

[0012] The movable component is located inside the cabinet and can move the detection chip located at its end to detect the samples in each detection tank in turn.

[0013] The cabinet also contains a cleaning cylinder, which is located on one side of the testing tank and placed side by side with the testing tank.

[0014] The cleaning cylinder is connected to two water pumps inside the cabinet via pipes. One water pump is used to deliver cleaning fluid to the cleaning cylinder, and the other water pump is used to discharge the cleaning fluid from inside the water pump to the outside.

[0015] Preferably, the bottom of the cleaning drum is provided with a drain pipe and two inlet pipes, and the two inlet pipes are located on both sides of the drain pipe. The drain pipe and the inlet pipes are both connected to the cleaning tank at the top of the cleaning drum, and the drain pipe and the inlet pipes are respectively connected to two water pumps through pipes.

[0016] The drain pipe is connected to the bottom of the cleaning tank; the water inlet pipe is connected to the cleaning tank near the top.

[0017] The cleaning solution is pumped from the inlet pipe to the cleaning tank by one of the water pumps, and then discharged from the cleaning tank to the outside by the drain pipe by another water pump.

[0018] Preferably, the cleaning cylinder has two water guide grooves inside, which are located on both sides of the cleaning tank. The ends of the water guide grooves are provided with connecting grooves, which are connected to the cleaning tank. The connecting grooves are inclined downward towards one end of the cleaning tank.

[0019] When the detection chip is inserted into the cleaning tank, the cleaning fluid rinses the outer walls of both sides of the detection chip from top to bottom along the connecting groove.

[0020] Preferably, a support base is installed inside the cabinet, and the support base is located below the detection chip. The top of the support base has a linearly arranged placement slot, and the detection can is placed in the placement slot.

[0021] Preferably, the moving component includes a translation component for driving the detection chip to move horizontally and a lifting component for driving the detection chip to move up and down.

[0022] The cabinet has a front baffle inside, and the front end of the front baffle has a horizontally extending guide groove. The translation component and the lifting component are respectively arranged on the front and rear sides of the front baffle, and the translation component and the lifting component are connected by a sliding seat. The sliding seat is located in the guide groove and can slide along the guide groove.

[0023] The detection tank and cleaning cylinder are arranged uniformly along the movement path of the translation component.

[0024] Preferably, the translation component includes a fixed plate connected to the rear end of the front baffle, and a drive gear and a driven gear are respectively provided at both ends of the fixed plate, and a connecting belt is sleeved on the outside of the drive gear and the driven gear;

[0025] The sliding seat is connected to the connecting belt, and the driving gear is driven to rotate by a translation motor on the fixed plate.

[0026] The outer wall of the fixed plate is provided with a slide rail, and the slide rail is slidably connected to the sliding seat. A stop block is provided on the same side of the fixed plate and the slide rail, and the stop block is set on the movement path of the sliding seat to limit the movement range of the sliding seat.

[0027] Preferably, the lifting assembly includes a lifting seat connected to a sliding seat, and a vertically extending lead screw is connected to the lifting seat. The lead screw is driven to rotate by a lifting motor mounted on the lifting seat, and a slider is connected to the outside of the lead screw.

[0028] The detection chip is connected to the slider. When the lead screw rotates, the slider slides up and down along the extension direction of the lead screw, causing the detection chip to move up and down.

[0029] (III) Beneficial Effects

[0030] 1. By employing a cleaning tank with a cleaning vessel as the cleaning structure for the detection chip, and connecting it to two water pumps via pipes, one pump injects cleaning solution into the cleaning tank while the other pump discharges the cleaning solution from the tank, thus creating a circulation of the cleaning solution to maintain its cleanliness. This effectively solves the technical problem of existing heavy metal detection devices lacking a stable cleaning structure and experiencing unstable operation, thereby achieving cyclic cleaning of the detection chip. Secondly, by adjusting the incident angle of the cleaning solution into the cleaning tank (i.e., the connecting pipe is tilted downwards), residual milk on the chip surface can be washed downwards during rinsing, improving the cleaning effect. Furthermore, the drainage pump is connected to the bottom of the cleaning tank, while the water injection pump is connected to the top of the tilted tank. Therefore, during cleaning solution circulation, the downward discharge and upward injection method prevents the washed-down milk from affecting the cleaning of the detection chip, thereby improving the cleaning effect and efficiency.

[0031] 2. By using a translation motor to drive the synchronous belt to rotate as the power source for the translation of the detection chip, and then using a lead screw assembly to drive the detection chip to rise and fall, a motion mode combining translation and lifting is formed, which drives the detection chip to rise and fall. In addition, the detection tank and the cleaning cylinder for cleaning are arranged in a row to facilitate the use of the detection chip in a combination of horizontal and vertical motion, thereby improving the stability of the detection chip's movement. Attached Figure Description

[0032] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0033] Figure 1This is an overall structural diagram of an embodiment of the present utility model;

[0034] Figure 2 This is an overall structural diagram of the cabinet interior in an embodiment of this utility model;

[0035] Figure 3 This is a diagram showing the docking structure between the movable component and the support base in an embodiment of this utility model;

[0036] Figure 4 This is a structural diagram of the moving component in an embodiment of the present utility model;

[0037] Figure 5 These are front and back structural diagrams of the moving component in an embodiment of this utility model;

[0038] Figure 6 This is an overall structural diagram of the translation component in an embodiment of this utility model;

[0039] Figure 7 This is an overall structural diagram of the lifting assembly in an embodiment of this utility model;

[0040] Figure 8 This is a diagram showing the docking structure of the support base and the testing tank in an embodiment of this utility model;

[0041] Figure 9 This is a schematic diagram of the front and back structures of the cleaning component in an embodiment of this utility model;

[0042] Figure 10 This is a structural diagram of the cleaning component in an embodiment of the present invention;

[0043] Figure 11 This is a cross-sectional view of the cleaning component in an embodiment of the present invention.

[0044] Legend:

[0045] 11. Cabinet body; 12. Cabinet door; 13. Support base; 14. Testing tank; 15. Front baffle; 16. Water pump;

[0046] 2. Translation assembly; 21. Fixed plate; 22. Translation motor; 23. Drive gear; 24. Driven gear; 25. Connecting belt; 26. Sliding seat;

[0047] 3. Lifting assembly; 31. Lifting base; 32. Lead screw; 33. Lifting motor; 34. Sliding block; 35. Extension plate; 36. Protective cover;

[0048] 4. Base;

[0049] 5. Detection chip;

[0050] 6. Cleaning components; 61. Cleaning cylinder; 62. Drain pipe; 63. Water inlet pipe; 64. Water guide trough. Detailed Implementation

[0051] This application provides a novel high-frequency application protection system for milk heavy metal detection chips, effectively solving the technical problems of existing heavy metal detection devices lacking a stable cleaning structure and exhibiting unstable operation. In existing heavy metal detection devices, a cleaning cylinder with a cleaning tank is used as the cleaning structure for the detection chip, connected to two water pumps via pipes. One pump injects cleaning fluid into the cleaning cylinder, while the other pump discharges the cleaning fluid from the cylinder, creating a circulation of the cleaning fluid to maintain its cleanliness. This achieves cyclic cleaning of the detection chip. Furthermore, by adjusting the incident angle of the cleaning fluid into the cleaning tank (i.e., the connecting pipe is tilted downwards), residual milk on the chip surface can be washed downwards during rinsing, improving the cleaning effect. Additionally, the drainage pump is connected to the bottom of the cleaning tank, while the water injection pump is connected to the top of the tilted tank. Therefore, during cleaning fluid circulation, the downward discharge and upward injection method prevents the washed-down milk from affecting the cleaning of the detection chip, thereby improving the cleaning effect and efficiency.

[0052] Example: The technical solution in this application example effectively solves the technical problem that existing heavy metal detection devices lack a stable cleaning structure and have unstable operation. The overall idea is as follows:

[0053] To address the problems existing in the prior art, this utility model provides a high-frequency application support system for a novel milk heavy metal detection chip. This system mainly comprises three parts: first, a support structure, which supports the subsequent cleaning and moving structures, acting as a carrier; second, a cleaning structure, whose main purpose is to clean the milk residue on the surface of the detection chip 5 to facilitate subsequent detection and analysis; and third, a moving structure for driving the detection chip 5. Since the detection chip 5 needs to move horizontally and vertically, the moving structure controls the detection chip 5 to enter each detection container 14 containing the sample to be tested. A cleaning cylinder 61 is positioned in the same row as the detection container 14, allowing the moving structure to drive the detection chip 5 into the cleaning cylinder 61 for subsequent cleaning. The specific structure is as follows:

[0054] The load-bearing structure is mainly composed of cabinet 11. The front of cabinet 11 has a cabinet door 12 and a touch screen. The touch screen displays test results and facilitates input of commands by staff. The cleaning structure and the samples to be tested are stored inside cabinet 11, near the cabinet door 12. Figure 1As shown, to facilitate the placement of the detection tank 14, a support base 13 is provided inside the cabinet 11 to support the detection tank 14. The support base 13 is located below the moving component and corresponds vertically to the detection chip 5. Both the detection tank 14 and the cleaning structure are placed on the support base 13, with the cleaning structure positioned at the outermost edge. Figure 2 As shown, the test container 14 is placed in the placement slot on top of the support 13. When changing the sample to be tested, simply remove the test container 14 from the placement slot and then replace it with the test container 14 containing the new sample to be tested. Figure 8 As shown, this is to facilitate the replacement of the sample to be tested.

[0055] The cleaning structure, namely the cleaning component 6, uses a cleaning cylinder 61 with a cleaning tank as the main body of the cleaning structure. The cleaning cylinder 61 can be rectangular or circular, and is not limited to the shape shown in the accompanying drawings. The main purpose is to protect the cleaning function. In order to speed up the cleaning efficiency and prevent the milk washed from the detection chip 5 from remaining in the cleaning solution, a drain pipe 62 is connected to the bottom of the cleaning cylinder 61, and a water inlet pipe 63 is set near the top of the cleaning tank. This forms a top-in, bottom-out state, so that the rewritten milk will be discharged directly out through the drain pipe 62 without affecting the milk remaining in the cleaning tank, thereby ensuring the cleanliness of the cleaning solution. The chip 5 is in contact with clean cleaning fluid; however, this presents a new problem: the inlet pipe 63 needs to be positioned on both sides of the cleaning cylinder 61. This not only occupies space but also exposes the inlet pipe 63, increasing the risk of damage. Therefore, both the inlet pipe 63 and the drain pipe 62 are located at the bottom of the cleaning cylinder 61, with the drain pipe 62 positioned at the center of the bottom. Two inlet pipes 63 are provided, one on each side of the drain pipe 62. The inlet pipes 63 connect to the water guide trough 64 inside the cleaning cylinder 61, and the top of the water guide trough 64 extends to near the top of the cleaning tank. Figure 11 As shown, this allows water to be delivered from near the top of the cleaning tank into the cleaning tank. Secondly, to avoid water splashing and to effectively wash off the milk adhering to the detection chip 5, a downward-sloping connecting groove is provided at the end of the cleaning cylinder 61 near the water guide groove 64. The connecting groove slopes downward towards the end of the cleaning tank, so that the cleaning liquid enters the connecting groove along the water guide groove 64, and then the connecting groove washes the detection chip 5 from top to bottom, and under the action of gravity, it makes acute-angle contact with the detection chip 5, thereby ensuring the cleaning effect and reducing splashing.

[0056] The movable structure is designed to facilitate the stable movement of the detection chip 5 to the corresponding position of the sample to be tested and the cleaning structure, and to align it with the support base 13 inside the cabinet 11. Figure 1 and Figure 2 As shown, the purpose of the moving structure is to drive the detection chip 5 to move between the detection tank 14 and the cleaning cylinder 61. The moving components are divided into a horizontally moving translation component 2 and a vertically moving lifting component 3. To shield certain components, a front baffle 15 is set between the translation component 2 and the lifting component 3, and the front baffle 15 is installed in the cabinet 11. A horizontally extending guide groove is opened at the front end of the front baffle 15. The translation component 2 and the lifting component 3 are respectively set on the front and rear sides of the front baffle 15, and the translation component 2 and the lifting component 3 are connected by a sliding seat 26. The sliding seat 26 is located in the guide groove and can slide along the guide groove. Among them, the translation component 2 includes a fixed plate 21 connected to the rear end of the front baffle 15, and a drive gear 23 and a driven gear 24 are respectively installed at both ends of the fixed plate 21. A connecting belt 25 is sleeved on the outside of the two drive gears 23 and the driven gear 24. Figure 5 and Figure 6 As shown, the sliding seat 26 is connected to the outside of the connecting belt 25, and the drive gear 23 is driven to rotate by the translation motor 22 on the fixed plate 21.

[0057] To ensure the stability of the sliding seat 26, a slide rail is provided on the outer wall of the fixed plate 21, and the slide rail is slidably connected to the sliding seat 26, such as... Figure 6 As shown, a stop is provided on the same side of the fixed plate 21 as the slide rail, and the stop is set on the movement path of the sliding seat 26 to limit the movement range of the sliding seat 26.

[0058] like Figure 7 As shown, the lifting assembly 3 includes a lifting seat 31 connected to the sliding seat 26, and a vertically extending lead screw 32 is connected to the lifting seat 31. The lead screw 32 is driven to rotate by a lifting motor 33 mounted on the lifting seat 31, and a slider 34 is externally connected to the lead screw 32. Therefore, when the lead screw 32 rotates, the slider 34 slides up and down along the extension direction of the lead screw 32, causing the detection chip 5 to move up and down. This requires connecting the detection chip 5 to the slider 34. Figure 3 and Figure 4 As shown, the front end of the slider 34 is connected to an extension plate 35, which supports the base 4 of the gripping detection chip 5. The detection chip 5 is located at the bottom of the extension plate 35 and corresponds to the detection tank 14 on the carrier 13. The front end of the lifting seat 31 is protected by a protective cover 36.

[0059] It should also be noted that when using a gold electrode in the voltammetry method for the redox reaction of lead, the experiment must be designed based on the characteristics of the gold electrode. Gold electrodes possess good chemical stability and conductivity, and are commonly used for the detection of heavy metal ions in stripping voltammetry. The following are the principles, operation, and precautions for determining lead ions using a gold electrode via anodic stripping voltammetry:

[0060] I. Basic Principles:

[0061] The surface of the gold electrode can be pretreated to form active sites, which can promote the adsorption of lead ions and redox reactions.

[0062] 1. Enrichment stage, reduction process: Under constant potential, i.e., cathode potential, the Pb in the solution... 2+ On the surface of the gold electrode, it is reduced to metallic lead (Pb) and adsorbed onto the electrode surface to form a "lead film": Pb 2+ +2e − ⇌Pb, adsorbed on the surface of Au electrode

[0063] 2. Dissolution stage, oxidation process: Applying a positive scanning potential, the adsorbed lead is oxidized to Pb. 2+ It is released into the solution, generating an oxidation current, a peak current, and the peak current is proportional to the lead ion concentration: Pb−2e−⇌Pb 2+ Key advantages: Gold electrodes do not require the use of mercury, avoiding mercury pollution and making them more environmentally friendly; they also have a strong adsorption capacity for lead, making them suitable for trace analysis.

[0064] II. Instruments and Reagents:

[0065] 1. Instruments: Voltammetry: Supports anodic stripping voltammetry, equipped with a three-electrode system: Working electrode: gold electrode, Au electrode, diameter 1-3mm, requires pretreatment; Reference electrode: Ag / AgCl electrode or saturated calomel electrode (SCE); Auxiliary electrode: platinum electrode (Pt electrode); Magnetic stirrer: used to stir the solution during the enrichment stage to accelerate mass transfer; Electrolytic cell: made of glass or polytetrafluoroethylene to avoid metal contamination.

[0066] 2. Reagents, lead standard solution: Weigh lead nitrate (Pb(NO3)2), dissolve it in 0.1mol / L dilute nitric acid to prepare a 1000mg / L stock solution. Dilute to prepare a series of standard solutions, such as 0.1-10μg / L, before use; Supporting electrolyte: 0.1mol / L potassium nitrate (KNO3) or acetate-sodium acetate buffer solution, pH 4-5, to promote lead ion adsorption; Optional addition of 0.01mol / L potassium chloride (KCl) to enhance conductivity and inhibit oxidation of the gold electrode surface; Pretreatment reagents: dilute nitric acid (1:1), used to clean the electrode and container; ethanol and distilled water: used for ultrasonic cleaning of the electrode.

[0067] III. Operating Procedures:

[0068] 1. Gold electrode pretreatment; Mechanical polishing: Polish the electrode surface to a mirror finish using alumina powder (Al2O3) with a particle size of 0.05 μm on a polishing cloth, and then ultrasonically clean it with ethanol and distilled water for 5 min in sequence to remove impurities; Electrochemical activation: In 0.1 mol / L H2SO4 solution, perform cyclic scanning at a scan rate of 100 mV / s in the range of -0.3-1.5 V for 5-10 cycles until a stable cyclic voltammogram is obtained to remove the surface oxide layer; Finally, rinse the electrode with distilled water and air dry for later use.

[0069] 2. Standard Curve Construction: During the enrichment process, take 50 mL of supporting electrolyte, such as 0.1 mol / L KNO3 + 0.01 mol / L KCl, and add it to the electrolytic cell. Add a certain volume of lead standard solution and adjust the pH to 4-5. Insert the three-electrode system, turn on the stirrer, and enrich for 120 s at an enrichment potential of -1.0 V (vs. Ag / AgCl) with a constant stirring speed, such as 500 rpm, to allow Pb to accumulate. 2+ The solution is reduced and adsorbed onto the gold electrode surface; after enrichment, stirring is stopped and the solution is allowed to stand for 30 seconds to avoid interference with the dissolution signal due to solution flow.

[0070] 3. Dissolution scan: A linear scan rate of 20 mV / s was used to scan from -1.0 V to -0.2 V, and the oxidation peak current (i) was recorded. p ) and peak potential (E p Each standard solution was measured 2-3 times, and the average peak current was taken.

[0071] 4. Plot a standard curve: Plot lead ion concentration (c, μg / L) on the x-axis and peak current (i) on the y-axis. p Let μA be the ordinate, and fit a linear equation, such as i p =kc+b, the correlation coefficient R2 ≥ 0.995 is required.

[0072] 5. Sample determination: Sample pretreatment: Liquid samples need to be acidified (pH 1-3) and filtered; solid samples need to be acid digested and then diluted to volume; enrichment and dissolution scanning are performed according to the standard curve procedure, and the lead ion concentration in the sample is calculated from the standard curve based on the peak current; if there is matrix interference (such as high concentration of salts), the standard addition method is required to improve accuracy: add a known amount of lead standard solution to the sample, compare the change of peak current before and after spiking, and calculate the true concentration.

[0073] IV. Key Influencing Factors and Optimization:

[0074] 1. Electrode pretreatment effect: The cleanliness of the gold electrode surface directly affects the adsorption efficiency of lead. If the polishing is not thorough or the activation is insufficient, it will lead to a low peak current or a broadened peak shape. Verification method: The activated electrode can be scanned in a 0.1 mol / L KCl solution containing 1 mmol / L K3[Fe(CN)6]. If the redox peak potential difference in the cyclic voltammogram is less than 80 mV and the peak current is stable, it indicates that the electrode is in good condition.

[0075] 2. Supporting electrolytes and pH, pH effect: When pH is too low (e.g., pH < 2), H... + Competitive reduction inhibits lead accumulation; at excessively high pH levels (e.g., pH > 6), lead readily hydrolyzes to form Pb(OH)₂ precipitate, reducing the amount of free Pb in the solution. 2+ Concentration; the optimal pH is usually 4-5, which can be adjusted using an acetate-sodium acetate buffer solution.

[0076] Supported electrolyte types: Nitrates (such as KNO3) have good conductivity, but Cl... - It can form complexes with gold electrodes (such as AuCl4). - Cl needs to be controlled - Concentration (recommended <0.1mol / L).

[0077] Sulfates (such as Na₂SO₄) can reduce Cl⁻ - It causes interference, but its conductivity is slightly lower than that of nitrates.

[0078] 3. Interference from coexisting ions, with Cu as the main interfering ion. 2+ Cd 2+ Hg 2+ Heavy metal ions, due to their reduction potential being similar to lead, may co-adsorb on the gold electrode; elimination methods include potential selection: optimizing the enrichment potential, such as -1.0V, can preferentially reduce lead and avoid some interfering ions; masking agent: adding 0.1 mol / L thiourea (to mask Cu). 2+ ) or 0.01 mol / LEDTA (complexes multiple metal ions); Separation pretreatment: For complex samples (such as soil leachate), lead and interfering ions can be separated first using ion exchange resin.

[0079] 4. Enrichment time and stirring rate: Enrichment time: Extending the enrichment time can improve sensitivity, but too long a time will lead to adsorption saturation on the electrode surface and the peak current will tend to stabilize. The optimal time needs to be determined experimentally, such as 120s. Stirring rate: Stirring can increase mass transfer efficiency, but too fast a rate will cause turbulence on the electrode surface and destroy the uniformity of the adsorption layer. It is recommended to fix it at 500-800 rpm.

[0080] V. Precautions:

[0081] 1. Gold electrode maintenance: After each measurement, clean the electrode surface with dilute nitric acid to avoid residual lead contamination in the next measurement; if the electrode sensitivity decreases after long-term use, it needs to be repolished and reactivated.

[0082] 2. For trace analysis, all containers must be soaked in 10% dilute nitric acid for 24 hours to avoid metal contamination; the experimental water must be ultrapure water with a resistivity ≥18.2 MΩ・cm.

[0083] 3. Safety and environmental protection: Lead standard solutions must be properly stored, and waste liquid must be collected in a special container and handed over to a professional organization for treatment; avoid prolonged contact between gold electrodes and strong oxidizing reagents (such as aqua regia) to prevent electrode corrosion.

[0084] VI. Application and Comparison:

[0085] Application scenarios: Suitable for the detection of trace lead in environmental water samples and biological samples, especially suitable for laboratories where mercury electrodes are limited.

[0086] Compared with mercury electrodes, gold electrodes are more environmentally friendly, but their sensitivity to lead is slightly lower than that of suspended mercury electrodes, with detection limits typically ranging from 0.1 to 1 μg / L, while mercury electrodes can reach levels as low as 0.01 μg / L. Gold electrodes are more tolerant to organic matter and are suitable for the analysis of complex matrix samples. By optimizing experimental conditions, the gold electrode anodic stripping voltammetry method can achieve accurate determination of lead ions, combining environmental friendliness and practicality.

[0087] In the specific implementation process, the first step is sample placement. The samples to be tested are first introduced into different testing containers 14. After completion, they are placed in the placement slots on top of the support 13, such as... Figure 8 As shown, commands are input to the device via the touch screen at the front of the cabinet 11;

[0088] The second step is to detect the movement of the chip 5 and control the energization of the translation motor 22 according to the detection position. Since the output shaft of the translation motor 22 is fitted with a drive gear 23 and the outside of the drive gear 23 is fitted with a connecting belt 25, when the translation motor 22 drives the drive gear 23 to rotate, it can drive the connecting belt 25 to move synchronously. The sliding seat 26 is connected to the connecting belt 25 and slides horizontally under the drive of the connecting belt 25.

[0089] When the chip to be tested 5 moves to the top of the test tank 14, the lifting motor 33 is controlled to drive the lead screw 32 to rotate. Since the slider 34 outside the lead screw 32 is connected to the chip to be tested 5, when the lifting motor 33 drives the lead screw 32 to rotate, it can drive the chip to be tested 5 to move in the direction of the test tank 14 until the chip to be tested 5 is inserted into the test tank 14 and is used to contact the sample to be tested stored inside the test tank 14, so that the sample to be tested stored in the test tank 14 can be tested.

[0090] Third, after the test is completed, the control moving structure moves the detection chip 5 to the position of the cleaning cylinder 61 and inserts it into the cleaning cylinder 61. Then, the control water pump 16 delivers the external cleaning solution along the pipeline to the water inlet pipe 63. The cleaning solution is delivered to the water guide tank 64 through the water inlet pipe 63. Then, the cleaning solution is inserted into the detection chip 5 inside the cleaning cylinder 61 through the connecting groove at the top of the guide tank for rinsing. At the same time, another water pump 16 and the pipeline of the drain pipe 62 at the bottom of the cleaning tank discharge the cleaning solution from the cleaning tank, completing the cycle.

[0091] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A high-frequency application protection system for a novel milk heavy metal detection chip, characterized in that, The system includes: The cabinet (11) contains multiple testing containers (14). The moving component is located inside the cabinet (11) and can move the detection chip (5) located at its end to detect the samples in each detection tank (14) in turn. The cabinet (11) also contains a cleaning tube (61), which is located on one side of the testing tank (14) and is arranged side by side with the testing tank (14). The cleaning cylinder (61) is connected to two water pumps (16) inside the cabinet (11) via pipes. One of the water pumps (16) is used to deliver cleaning liquid to the cleaning cylinder (61); the other water pump (16) is used to discharge the cleaning liquid inside the water pump (16) to the outside.

2. The high-frequency application protection system for the novel milk heavy metal detection chip as described in claim 1, characterized in that: The bottom of the cleaning cylinder (61) is provided with a drain pipe (62) and two inlet pipes (63), and the two inlet pipes (63) are located on both sides of the drain pipe (62). The drain pipe (62) and the inlet pipes (63) are connected to the cleaning trough at the top of the cleaning cylinder (61), and the drain pipe (62) and the inlet pipes (63) are connected to two water pumps (16) through pipes. The drain pipe (62) is connected to the bottom of the cleaning tank; the water inlet pipe (63) is connected to the cleaning tank near the top. The cleaning solution is delivered from the inlet pipe (63) to the cleaning tank by one of the water pumps (16), and then discharged from the cleaning tank to the outside by the drain pipe (62) by another water pump (16).

3. The high-frequency application protection system for the novel milk heavy metal detection chip as described in claim 2, characterized in that: The cleaning cylinder (61) has two water guide channels (64) inside. The two water guide channels (64) are located on both sides of the cleaning tank, and the ends of the water guide channels (64) are provided with connecting channels. The water guide channels (64) are connected to the cleaning tank through the connecting channels, and the connecting channels are inclined downward towards one end of the cleaning tank. When the detection chip (5) is inserted into the cleaning tank, the cleaning fluid rinses the outer walls of both sides of the detection chip (5) from top to bottom along the connecting groove.

4. The high-frequency application protection system for the novel milk heavy metal detection chip as described in claim 1, characterized in that: The cabinet (11) is equipped with a support base (13) inside, and the support base (13) is located below the detection chip (5). The top of the support base (13) is provided with a linearly arranged placement slot, and the detection tank (14) is placed in the placement slot.

5. The high-frequency application protection system for the novel milk heavy metal detection chip as described in claim 1, characterized in that: The moving component includes a translation component (2) for driving the detection chip (5) to move horizontally and a lifting component (3) for driving the detection chip (5) to move up and down. The cabinet (11) is provided with a front baffle (15) inside, and the front baffle (15) has a horizontally extending guide groove at its front end. The translation component (2) and the lifting component (3) are respectively provided on the front and rear sides of the front baffle (15), and the translation component (2) and the lifting component (3) are connected by a sliding seat (26). The sliding seat (26) is located in the guide groove and can slide along the guide groove. The detection tank (14) and the cleaning cylinder (61) are evenly arranged along the movement path of the translation component (2).

6. The high-frequency application protection system for the novel milk heavy metal detection chip as described in claim 5, characterized in that: The translation component (2) includes a fixed plate (21) connected to the rear end of the front baffle (15), and a drive gear (23) and a driven gear (24) are respectively provided at both ends of the fixed plate (21), and a connecting belt (25) is sleeved on the outside of the drive gear (23) and the driven gear (24). The sliding seat (26) is connected to the connecting belt (25), and the driving gear (23) is driven to rotate by the translation motor (22) on the fixed plate (21); The outer wall of the fixed plate (21) is provided with a slide rail, and the slide rail is slidably connected to the sliding seat (26). A stop block is provided on the same side of the fixed plate (21) and the slide rail, and the stop block is set on the movement path of the sliding seat (26) to limit the movement range of the sliding seat (26).

7. The high-frequency application protection system for the novel milk heavy metal detection chip as described in claim 6, characterized in that: The lifting assembly (3) includes a lifting seat (31) connected to a sliding seat (26), and a vertically extending lead screw (32) is connected to the lifting seat (31). The lead screw (32) is driven to rotate by a lifting motor (33) installed on the lifting seat (31), and a slider (34) is connected to the outside of the lead screw (32). The detection chip (5) is connected to the slider (34). When the lead screw (32) rotates, the slider (34) slides up and down along the extension direction of the lead screw (32), causing the detection chip (5) to move up and down.

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