Water quality heavy metal analyzer

Abstract

The utility model relates to environmental monitoring and analytical chemistry instrument technical field, concretely is a kind of water quality heavy metal analyzer, solve the problem proposed in background art, it includes host computer and detachable connection disposable detection box, the host computer inside is provided with control and processing circuit, electrochemical detector and fluid driving assembly, the disposable detection box includes box body, the box body is formed with sequentially connected sample inlet, reaction cell and waste liquid cavity, dry chemical reagent module and miniature three-electrode system are fixedly arranged in the reaction cell, when the disposable detection box is inserted in place, drive end and sample inlet form sealed flow path connection, the utility model is integrated in disposable detection box by dry chemical reagent, miniature three-electrode system and waste liquid cavity height, and realize the automatic accurate butt joint of electricity and flow path by using host computer card slot, to realize the one-key type rapid detection of water quality heavy metal.

Description

Technical Field

[0001] This utility model relates to the field of environmental monitoring and analytical chemical instruments, specifically a water quality heavy metal analyzer. Background Technology

[0002] Heavy metal pollution in water is one of the most important environmental problems facing the world today. Heavy metals such as lead, cadmium, mercury, chromium, and arsenic are highly toxic, bioaccumulate, and are non-degradable. Even at extremely low concentrations, they can pose a serious threat to ecosystems and human health. Therefore, the development of rapid, accurate, and sensitive water heavy metal detection technologies and instruments is of vital importance for environmental monitoring, drinking water safety, and industrial wastewater treatment.

[0003] Currently, the main technologies used for heavy metal analysis in water quality include atomic absorption spectrometry, inductively coupled plasma atomic emission spectrometry (ICP-AES) or mass spectrometry (MS / MS), and electrochemical analysis. While atomic absorption spectrometry and ICP-AES offer high accuracy and sensitivity, their instruments are expensive, bulky, complex to operate, and have high operating costs. They also require specialized laboratory environments and operators, typically limiting their use to laboratory settings and making them unsuitable for rapid on-site detection. Electrochemical analysis, particularly anodic stripping voltammetry, is widely used in the development of portable heavy metal detectors due to its high sensitivity, lower instrument cost, and ease of miniaturization. However, existing portable electrochemical analyzers still suffer from limitations in practical field applications, including cumbersome operation, the risk of secondary contamination, and low detection efficiency and consistency.

[0004] Therefore, there is an urgent need for a water quality heavy metal analyzer that can overcome the above-mentioned defects, integrate reagent and electrode pretreatment functions, truly achieve one-click rapid operation, and avoid secondary pollution, so as to meet the growing demand for rapid on-site detection. Utility Model Content

[0005] To solve the above problems, this utility model provides the following technical solution: a water quality heavy metal analyzer, including a main unit and a detachable disposable detection box;

[0006] The host is equipped with control and processing circuits, an electrochemical detector and a fluid drive assembly. The host housing is provided with a slot for inserting the disposable test box.

[0007] The disposable test kit includes a box body, in which a sample inlet, a reaction chamber, and a waste liquid chamber are sequentially connected; a dry chemical reagent module and a micro three-electrode system are fixedly installed in the reaction chamber; the electrode contacts of the micro three-electrode system are exposed on the outer surface of the box body.

[0008] A first electrical connector is provided inside the slot at a corresponding position, and a second electrical connector is provided on the outer surface of the box. When the disposable detection box is inserted into the slot, the first electrical connector and the second electrical connector make contact and conduction, so that the micro three-electrode system and the electrochemical detector form an electrical connection.

[0009] The driving end of the fluid drive assembly extends into the slot. When the disposable test box is inserted into place, the driving end forms a sealed flow path connection with the sample inlet.

[0010] Preferably, the dry chemical reagent module is a thin film solidified at the bottom of the reaction tank, and its composition is a mixture of supporting electrolyte and pH buffer.

[0011] Preferably, the working electrode of the micro three-electrode system is a glassy carbon electrode pre-coated with a bismuth film.

[0012] Preferably, a microfilter is embedded in the sample inlet.

[0013] Preferably, the pore size of the filter membrane of the microfilter is 0.22 micrometers to 0.45 micrometers.

[0014] Preferably, the host computer has a touch screen on its panel, and the touch screen is electrically connected to the control and processing circuit.

[0015] Preferably, the slot is provided with a positioning protrusion, and the interface of the box body is provided with a positioning groove that matches the positioning protrusion.

[0016] Preferably, the box body is made of black or opaque ABS plastic.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: by highly integrating dry chemical reagents, a micro three-electrode system and a waste liquid chamber into a disposable detection kit, and using the main unit slot to achieve automatic and precise docking of electrical properties and flow paths, one-click rapid detection of heavy metals in water quality is realized. This eliminates the cumbersome reagent addition, electrode pretreatment and waste liquid treatment steps in traditional methods, reducing the difficulty of operation and time costs, avoiding the risk of cross-contamination and secondary pollution, and improving the efficiency, safety and consistency of on-site detection results. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the disposable testing box of this utility model;

[0021] Figure 3 This is a cross-sectional view of the disposable testing box of this utility model.

[0022] In the diagram: 1. Main unit; 11. Control and processing circuit; 12. Electrochemical detector; 13. Fluid drive assembly; 14. Card slot; 15. Touch screen; 2. Disposable test kit; 21. Kit body; 22. Sample inlet; 23. Reaction cell; 24. Waste liquid chamber; 25. Dry chemical reagent module; 26. Miniature three-electrode system; 27. Miniature filter. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0024] like Figure 1 As shown, the water quality heavy metal analyzer of this embodiment includes a main unit 1 and a disposable test box 2 that can be detachably connected;

[0025] The main unit 1 is equipped with a control and processing circuit 11, an electrochemical detector 12 and a fluid drive assembly 13. The housing of the main unit 1 is provided with a slot 14 for inserting a disposable test box 2.

[0026] The disposable test kit 2 includes a box body 21, within which a sample inlet 22, a reaction chamber 23, and a waste liquid chamber 24 are sequentially connected. A dry chemical reagent module 25 and a micro three-electrode system 26 are fixedly installed in the reaction chamber 23. The electrode contacts of the micro three-electrode system 26 are exposed on the outer surface of the box body 21.

[0027] A first electrical connector is provided at a corresponding position inside the slot 14, and a second electrical connector is provided on the outer surface of the box 21. When the disposable test box 2 is inserted into the slot 14, the first electrical connector and the second electrical connector make contact and conduction, so that the miniature three-electrode system 26 and the electrochemical detector 12 form an electrical connection.

[0028] The drive end of the fluid drive assembly 13 extends into the slot 14. When the disposable test box 2 is inserted into place, the drive end forms a sealed flow path connection with the sample inlet 22.

[0029] The dry chemical reagent module 25 is a thin film solidified at the bottom of the reaction tank 23, and its composition is a mixture of supporting electrolyte and pH buffer.

[0030] The working electrode of the miniature three-electrode system 26 is a glassy carbon electrode pre-coated with a bismuth film.

[0031] A microfilter 27 is embedded at the injection port 22.

[0032] The microfilter 27 has a filter membrane pore size of 0.22 micrometers to 0.45 micrometers.

[0033] The main unit 1 has a touch screen 15 on its front panel, and the touch screen 15 is electrically connected to the control and processing circuit 11.

[0034] The slot 14 is provided with a positioning protrusion, and the interface of the box 21 is provided with a positioning groove that matches the positioning protrusion.

[0035] The box 21 is made of black or opaque ABS plastic.

[0036] The working principle of this utility model is as follows: When the disposable test box 2 is inserted, the host 1 automatically starts the fluid drive component 13, and the water sample to be tested is sucked into the reaction tank 23 through the sample inlet 22. The water sample dissolves the dry chemical reagent module 25 to form a suitable electrolytic environment for detection. Then, the electrochemical detector 12 performs anodic stripping voltammetry detection on the heavy metal ions in the solution through the micro three-electrode system 26 that has been connected. The generated electrical signal is analyzed and calculated by the control and processing circuit 11, and finally the heavy metal concentration result is directly displayed on the touch screen 15. The waste liquid after detection is stored in the sealed waste liquid chamber 24 and discarded together with the disposable test box 2.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A water quality heavy metal analyzer, characterized in that, Includes a main unit (1) and a detachable disposable testing box (2); The host (1) is equipped with a control and processing circuit (11), an electrochemical detector (12) and a fluid drive assembly (13). The housing of the host (1) is provided with a slot (14) for inserting the disposable detection box (2). The disposable test kit (2) includes a box body (21), in which a sample inlet (22), a reaction chamber (23), and a waste liquid chamber (24) are formed in sequence; a dry chemical reagent module (25) and a micro three-electrode system (26) are fixedly arranged in the reaction chamber (23); the electrode contacts of the micro three-electrode system (26) are exposed on the outer surface of the box body (21); A first electrical connector is provided at a corresponding position inside the slot (14), and a second electrical connector is provided on the outer surface of the box (21); when the disposable detection box (2) is inserted into the slot (14), the first electrical connector and the second electrical connector make contact and conduction, so that the micro three-electrode system (26) and the electrochemical detector (12) form an electrical connection; The driving end of the fluid drive assembly (13) extends into the slot (14). When the disposable test box (2) is inserted into place, the driving end forms a sealed flow path connection with the sample inlet (22).

2. The water quality heavy metal analyzer according to claim 1, characterized in that: The dry chemical reagent module (25) is a thin film solidified at the bottom of the reaction tank (23), and its composition is a mixture of supporting electrolyte and pH buffer.

3. The water quality heavy metal analyzer according to claim 1, characterized in that: The working electrode of the micro three-electrode system (26) is a glassy carbon electrode pre-coated with a bismuth film.

4. The water quality heavy metal analyzer according to claim 1, characterized in that: A microfilter (27) is embedded in the inlet (22).

5. A water quality heavy metal analyzer according to claim 4, characterized in that: The microfilter (27) has a filter membrane pore size of 0.22 micrometers to 0.45 micrometers.

6. A water quality heavy metal analyzer according to claim 1, characterized in that: The host (1) is provided with a touch screen (15) on its panel, and the touch screen (15) is electrically connected to the control and processing circuit (11).

7. A water quality heavy metal analyzer according to claim 1, characterized in that: The slot (14) is provided with a positioning protrusion, and the interface of the box (21) is provided with a positioning groove that matches the positioning protrusion.

8. A water quality heavy metal analyzer according to claim 1, characterized in that: The box (21) is made of black or opaque ABS plastic.

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