Portable enrichment device for micro-plastics in water sample

Abstract

The utility model relates to the technical field of micro-plastic enrichment, in particular to a portable water sample micro-plastic enrichment device, which comprises a sample injector for adding a water sample, and the sample injector is of a tubular structure with different upper and lower diameters; the control valve is used for controlling the flow velocity of the water sample, and the control valve is connected with the sample injector; the fixing mechanism is used for fixing the sample injector, and the fixing mechanism comprises a base, a fixing assembly and an extension assembly; the enrichment assembly is used for enriching micro-plastics in the water sample, and the enrichment assembly is arranged at the bottom of the sample injector and is communicated with the sample injector. The device disclosed by the utility model can be used for simultaneously treating a plurality of samples, and is low in cost, convenient to carry and simple to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of microplastic enrichment, in particular to a convenient device for enriching microplastics in water samples. Background Art

[0002] The concentration of microplastics in environmental water and drinking water is low, but their accumulation in organisms poses a threat to human health.

[0003] The rapid enrichment and detection of microplastics in water samples is of great significance to ensure the safety of drinking water. Surface enhanced Raman scattering detection is one of the commonly used analytical methods. At present, the enrichment of microplastics in water samples is mostly designed as a single enrichment device, and the device is not associated with the detection. Some devices will have the problem of making the sample concentrated in a small volume, and the device structure is complex and not easy to carry. Utility Model Content

[0004] The purpose of the utility model is to provide a convenient device for enriching microplastics in water samples, which can achieve the concentration and enrichment of water samples, and simultaneously process multiple samples to improve the processing efficiency, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above purpose, the utility model provides the following technical solution: a convenient device for enriching microplastics in water samples, comprising:

[0006] A sample adder, used for adding water samples, wherein the sample adder is a tubular structure with different upper and lower diameters;

[0007] A control valve, used to control the flow rate of the water sample, wherein the control valve is connected to the sample injector;

[0008] A fixing mechanism, used to fix the sample injector, the fixing mechanism comprising a base, a fixing component and an extension component;

[0009] An enrichment component is used to enrich microplastics in water samples. The enrichment component is arranged at the bottom of the sampler and is connected to the sampler.

[0010] Preferably, the sample adder comprises a water receiving end and a water conducting end, the water receiving end is a glass tube 1 with a diameter not less than 5 cm, and the water conducting end is a glass tube 2 with a diameter not less than 1 cm.

[0011] Preferably, the control valve is a knob-type valve, and the control valve is connected to the water guiding end.

[0012] Preferably, the extension assembly is detachably arranged on the upper part of the base, and the extension assembly includes an extension fixing rod, a thread provided on the outer side of the extension rod, and a plurality of nuts matching the thread.

[0013] Preferably, the fixing assembly includes a plurality of fixing plates, a connecting hole is opened in the middle of the fixing plate, a plurality of fixing holes are opened on the surface of the fixing plate around the connecting hole, and a through groove cooperating with the control valve is opened on the edge of the fixing hole in the fixing plate.

[0014] Preferably, the enrichment component comprises an outer tube, a porous sponge column disposed inside the outer tube, a porous support plate and a Raman substrate, and the Raman substrate, the porous sponge column and the porous support plate are closely arranged inside the outer tube from top to bottom.

[0015] Preferably, the lower portion of the water conduit extends into the interior of the outer tube and contacts the upper surface of the Raman substrate; the lower portion of the outer tube is connected to a drain pipe.

[0016] Preferably, a plurality of filtrate collecting tanks for collecting filtrate are provided on the upper portion of the base.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] The utility model adopts a Raman substrate to achieve the enrichment of trace microplastic samples in water samples, which can be directly used for Raman detection; and multiple samples can be processed simultaneously, with low device cost and simple operation. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0020] Figure 2 It is a side view of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the enrichment component of the utility model;

[0022] In the figure: sampler 1, control valve 2, fixing mechanism 3, enrichment component 4, nut 5, water receiving end 101, water guiding end 102, base 301, fixing component 302, extension component 303, outer tube 401, drain pipe 402, filtrate collecting tank 403, fixing plate 3021, fixing hole 3022, through groove 3023, extension rod 3031, porous sponge column 4011, porous support plate 4012, Raman substrate 4013. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] refer to Figure 1-3 The utility model provides a convenient device for enriching microplastics in water samples, a convenient device for enriching microplastics in water samples, comprising: a sample adder 1, a control valve 2, a fixing mechanism 3, and an enrichment component 4.

[0025] The sample adder 1 is used to add water samples. The sample adder 1 is a tubular structure with different upper and lower diameters. The sample adder 1 includes a water receiving end 101 and a water conducting end 102. The water receiving end 101 is a glass tube 1 with a diameter of not less than 5 cm, and the water conducting end 102 is a glass tube 2 with a diameter of not less than 1 cm.

[0026] The control valve 2 is used to control the flow rate of the water sample, and the control valve 2 is connected to the sampler 1; the fixing mechanism 3 is used to fix the sampler 1, and the fixing mechanism 3 includes a base 301, a fixing component 302 and an extension component 303; the enrichment component 4 is used to enrich microplastics in the water sample, and the enrichment component 4 is installed at the bottom of the sampler 1 and is connected to the sampler 1.

[0027] The control valve 2 is a knob valve, and the control valve 2 is connected to the water guide end 102. The extension component 303 is detachably mounted on the upper part of the base 301, and the extension component 303 includes an extension rod 3031, a thread opened on the outside of the extension rod 3031, and a plurality of nuts 5 matching the thread. The fixing component 302 includes a plurality of fixing disks 3021, a connection hole is opened in the middle of the fixing disk 3021, a plurality of fixing holes 3022 are opened around the connection hole on the surface of the fixing disk 3021, and a through groove 3023 matching the control valve 2 is opened at the edge of the fixing hole 3022 in the fixing disk 3021. The enrichment component 4 includes an outer tube 401, a porous sponge column 4011 installed inside the outer tube 401, a porous support plate 4012 and a Raman substrate 4013, and the Raman substrate 4013, the porous sponge column 4011 and the porous support plate 4012 are closely arranged inside the outer tube 401 from top to bottom. The lower part of the water guide end 102 extends into the inner part of the outer tube 401 and contacts the upper surface of the Raman substrate 4013. The lower part of the outer tube 401 is connected with a drain pipe 402. The upper part of the base 301 is equipped with a plurality of filtrate collection tanks 403 for collecting filtrate.

[0028] Working principle: When in use, first install 2-3 fixing plates 3021 on the outside of the extension rod 3031. The specific installation process is as follows: lower a fixing plate 3021 and insert it into the extension rod 3031, support the fixing plate 3021 through the nut 5 threadedly connected to the extension rod 3031, and then screw in the nut 5 from the top and press it against the upper part of the fixing plate 3021; ​​then, screw in another nut 5, the distance between the nut 5 and the installed fixing plate 3021 can be adjusted according to actual needs, and then install another fixing plate 3021 according to the above steps, and align the fixing holes 3022 on the upper and lower fixing plates 3021.

[0029] After the fixing plate 3021 is installed, the sample injector 1 is inserted into the fixing hole 3022 from top to bottom, and the sample injector 1 is fixed by the fixing plate 3021. Since the fixing plate 3021 is provided with a plurality of fixing holes 3022 and through slots 3023, a plurality of sample injectors 1 can be fixed at the same time.

[0030] Place the filtrate collection tank 403 at the lower part of the drain pipe 402; add water sample to the water receiving end 101, turn the control valve 2 to adjust the flow rate of the water sample, and the water sample passes through the enrichment column and is discharged from the drain pipe 402 to the filtrate collection tank 403.

[0031] The Raman substrate 4013 in the enrichment column is used to enrich microplastics in the water sample. The Raman substrate 4013 used in this embodiment is composed of a Raman substrate material (nanosilver dendrite material) and filter paper.

[0032] The enrichment component 4 in this embodiment can achieve the concentration and enrichment of 10 to 100 volumes of water samples, and can directly perform Raman detection after filtration to achieve qualitative and quantitative analysis; the device is simple to prepare and low in cost, and can achieve the simultaneous processing of at least 6 samples.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A convenient device for enriching microplastics in water samples, characterized in that: include: A sample adder (1) is used to add water samples, wherein the sample adder (1) is a tubular structure with different diameters at the top and bottom; A control valve (2) for controlling the flow rate of the water sample, wherein the control valve (2) is connected to the sample injector (1); A fixing mechanism (3) for fixing the sample injector (1), wherein the fixing mechanism (3) comprises a base (301), a fixing component (302) and an extension component (303); An enrichment component (4) is used to enrich microplastics in a water sample. The enrichment component (4) is arranged at the bottom of the sample injector (1) and is connected to the sample injector (1).

2. A portable device for enriching microplastics in water samples according to claim 1, characterized in that: The sample injector (1) comprises a water receiving end (101) and a water conducting end (102); the water receiving end (101) is a glass tube 1 with a diameter not less than 5 cm, and the water conducting end (102) is a glass tube 2 with a diameter not less than 1 cm.

3. A portable device for enriching microplastics in water samples according to claim 1, characterized in that: The control valve (2) is a knob-type valve, and the control valve (2) is connected to the water guide end (102).

4. A portable device for enriching microplastics in water samples according to claim 1, characterized in that: The extension component (303) is detachably arranged on the upper part of the base (301), and the extension component (303) comprises an extension rod (3031), a thread formed on the outer side of the extension rod (3031), and a plurality of nuts (5) matching the thread.

5. A portable device for enriching microplastics in water samples according to claim 1, characterized in that: The fixing assembly (302) comprises a plurality of fixing disks (3021), a connection hole is provided in the middle of the fixing disk (3021), a plurality of fixing holes (3022) are provided on the surface of the fixing disk (3021) around the connection hole, and a through groove (3023) is provided at the edge of the fixing hole (3022) in the fixing disk (3021) to cooperate with the control valve (2) door.

6. A portable device for enriching microplastics in water samples according to claim 1, characterized in that: The enrichment component (4) includes an outer tube (401), a porous sponge column (4011) arranged inside the outer tube (401), a porous support plate (4012) and a Raman substrate (4013), wherein the Raman substrate (4013), the porous sponge column (4011) and the porous support plate (4012) are closely arranged inside the outer tube (401) from top to bottom.

7. A portable device for enriching microplastics in water samples according to claim 2, characterized in that: The lower part of the water-conducting end (102) extends into the interior of the outer tube (401) and contacts the upper surface of the Raman substrate (4013); the lower part of the outer tube (401) is connected to a drainage pipe (402).

8. A portable device for enriching microplastics in water samples according to claim 1, characterized in that: A plurality of filtrate collecting tanks (403) for collecting filtrate are arranged on the upper part of the base (301).

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