CN216051034U - Separating device for micro plastic particles and micromolecular migrates - Google Patents
Separating device for micro plastic particles and micromolecular migrates Download PDFInfo
- Publication number
- CN216051034U CN216051034U CN202121736641.5U CN202121736641U CN216051034U CN 216051034 U CN216051034 U CN 216051034U CN 202121736641 U CN202121736641 U CN 202121736641U CN 216051034 U CN216051034 U CN 216051034U
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- Prior art keywords
- cup
- receiving
- bowl
- plastic particles
- filter
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- 239000002245 particle Substances 0.000 title claims abstract description 29
- 229920000426 Microplastic Polymers 0.000 title claims abstract description 27
- 239000012528 membrane Substances 0.000 claims abstract description 26
- 238000000926 separation method Methods 0.000 claims abstract description 25
- 238000002414 normal-phase solid-phase extraction Methods 0.000 claims abstract description 19
- 238000001914 filtration Methods 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims description 27
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 8
- 229910052709 silver Inorganic materials 0.000 claims description 8
- 239000004332 silver Substances 0.000 claims description 8
- 150000003384 small molecules Chemical class 0.000 claims description 7
- 235000013305 food Nutrition 0.000 abstract description 13
- 238000001514 detection method Methods 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 9
- 239000000126 substance Substances 0.000 abstract description 4
- 238000004458 analytical method Methods 0.000 abstract description 3
- 241001122767 Theaceae Species 0.000 description 11
- 239000003480 eluent Substances 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000004677 Nylon Substances 0.000 description 5
- 229920001778 nylon Polymers 0.000 description 5
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 4
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000004885 tandem mass spectrometry Methods 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- HFACYLZERDEVSX-UHFFFAOYSA-N benzidine Chemical compound C1=CC(N)=CC=C1C1=CC=C(N)C=C1 HFACYLZERDEVSX-UHFFFAOYSA-N 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229920002302 Nylon 6,6 Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 238000001069 Raman spectroscopy Methods 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- 231100000206 health hazard Toxicity 0.000 description 1
- 238000000589 high-performance liquid chromatography-mass spectrometry Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 239000004611 light stabiliser Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 150000003142 primary aromatic amines Chemical class 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Separation Using Semi-Permeable Membranes (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The utility model belongs to the technical field of separation devices, and discloses a separation device for micro plastic particles and micromolecular migrants, which comprises a filter cup, a receiving cup and a solid-phase extraction column; the lower extreme of filter bowl is connected with the upper end of receiving the cup, is equipped with filtration membrane between the lower extreme inside of filter bowl and the upper end inside of receiving the cup, and the lower extreme of receiving the cup is connected with the upper end of solid-phase extraction post, and the lateral wall of receiving the cup is equipped with the feed liquor pipe. The separation device for the micro plastic particles and the micromolecular migrates can realize the rapid separation and enrichment of the micro plastic particles and the micromolecular migrates in the same food contact material sample, and is convenient for subsequent detection and analysis, so that the aim of simultaneously detecting the two substances is fulfilled, and the efficiency is improved.
Description
Technical Field
The utility model belongs to the technical field of separation devices, and particularly relates to a separation device for micro plastic particles and micromolecular migrant.
Background
Food contact material refers to a material or device that can be brought into direct or indirect contact with food during the manufacture, processing, packaging, and transportation of the food. Additives may be used in food contact materials to improve the storage quality of the food, including ultraviolet light stabilizers, antioxidants, plasticizers, and the like. Additives in food contact materials can migrate into food products by contact, i.e., small molecule migrates, posing a risk of human health hazards. According to literature investigations, food contact materials can migrate out of micro plastic particulates, such as nipples and tea bags, in addition to the small molecule migrates mentioned above.
The detection of micro plastic particles and micromolecular migrates requires the pretreatment of food contact materials, most of the prior sample pretreatment separation devices are separated independently, the operation is inconvenient, the simultaneous separation of the micromolecular migrates and the micro plastic particles aiming at the same sample can not be realized, and the separation efficiency is low.
SUMMERY OF THE UTILITY MODEL
The present invention aims to provide a separation device for micro plastic particles and small molecule migrates, which solves one or more technical problems in the prior art, and at least provides a useful choice or creation condition.
The technical scheme adopted for solving the technical problems is as follows:
a separation device for micro plastic particles and micromolecular migrates comprises a filter bowl, a receiving cup and a solid phase extraction column; the lower end of the filter cup is connected with the upper end of the receiving cup, a filtering membrane is arranged between the inner part of the lower end of the filter cup and the inner part of the upper end of the receiving cup, the lower end of the receiving cup is connected with the upper end of the solid-phase extraction column, and a liquid inlet pipe is arranged on the side wall of the receiving cup.
Preferably, the O-shaped flange ring further comprises an O-shaped flange ring, the O-shaped flange ring comprises a first chuck and a second chuck hinged to the first chuck, the first chuck comprises a first handle and a first arc-shaped clamping arm, the second chuck comprises a second handle and a second arc-shaped clamping arm, a radial outward filter cup flange is arranged at the lower end of the filter cup, a radial outward receiving cup flange is arranged at the upper end of the receiving cup, and the first arc-shaped clamping arm and the second arc-shaped clamping arm are respectively clamped on the filter cup flange and the receiving cup flange.
Preferably, the diameter of the filtering membrane is slightly larger than the inner diameter of the lower end of the filter cup and the inner diameter of the upper end of the receiving cup, and the filtering membrane is a silver filtering membrane.
Preferably, the liquid inlet pipe and the receiving cup are integrally formed.
Preferably, the liquid inlet pipe also comprises a piston, and the piston is connected with the liquid inlet of the liquid inlet pipe.
Compared with the prior art, the utility model has the following beneficial effects:
(1) according to the separation device for the micro plastic particles and the micromolecular migrates, disclosed by the utility model, the rapid separation and enrichment of the micro plastic particles and the micromolecular migrates in the same food contact material sample can be realized through the filter cup, the receiving cup and the solid phase extraction column which are sequentially connected from top to bottom, so that the subsequent detection and analysis are facilitated, the purpose of simultaneously detecting the two substances is achieved, and the efficiency is improved.
(2) The device for separating the micro plastic particles from the micromolecular migrates has the advantages of simple structure, small volume and convenient operation, and is favorable for field use in environment and food safety.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of an O-shaped flange ring;
FIG. 3 is an infrared spectrometer detection image of a filtrate on the filtration membrane in the example;
FIG. 4 is a UHPLC-MS/MS detection graph of eluents collected in the example.
In the figure, 100-a filter cup, 200-a receiving cup, 201-a liquid inlet pipe, 300-a solid phase extraction column, 400-an O-shaped flange ring, 401-a first handle, 402-a first arc-shaped clamping arm, 403-a second handle, 404-a second arc-shaped clamping arm and 500-a piston.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, if words such as "a plurality" are described, the meaning is one or more, the meaning of a plurality is two or more, more than, less than, more than, etc. are understood as excluding the present number, and more than, less than, etc. are understood as including the present number.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1, in the embodiment of the present invention, a separation device for micro plastic particles and small molecule migrates includes a filter cup 100, a receiving cup 200, a solid phase extraction column 300, an O-ring flange and a piston 500. The lower end of the bowl 100 is fixedly connected to the upper end of the receiving cup 200 by an O-ring flange. A filtration membrane (not shown) is provided between the inside of the lower end of the filter cup 100 and the inside of the upper end of the receiving cup 200, and the lower end of the receiving cup 200 is connected to the upper end of the solid phase extraction column 300. The lateral wall of the receiving cup 200 is provided with a liquid inlet pipe 201, the liquid inlet pipe 201 and the receiving cup 200 are integrally formed, and the piston 500 is connected with a liquid inlet of the liquid inlet pipe 201 to seal the liquid inlet pipe 201.
Referring to fig. 2, the O-ring flange includes a first jaw including a first handle 401 and a first arc-shaped clamp arm 402, and a second jaw hinged to the first jaw including a second handle 403 and a second arc-shaped clamp arm 404. The O-ring is naturally clamped and released by pressing the first handle 401 and the second handle 403. The lower end of the filter bowl 100 is provided with a filter bowl flange which is outward in the radial direction, the upper end of the receiving bowl 200 is provided with a receiving bowl flange which is outward in the radial direction, the first arc-shaped clamping arm 402 and the second arc-shaped clamping arm 404 are clamped on the filter bowl flange and the receiving bowl flange respectively, and under the clamping force of an O-shaped flange ring, the filter bowl 100 and the receiving bowl 200 are fixedly butted. The filter cup 100 and the receiving cup 200 can be quickly disassembled and assembled through the O-shaped flange ring.
In this embodiment, the diameter of the filtering membrane is slightly larger than the inner diameter of the lower end of the filter bowl 100 and the inner diameter of the upper end of the receiving bowl 200, and after the filter bowl 100 and the receiving bowl 200 are butted and fixed, the filtering membrane can be tightly pressed on the connecting surface of the filter bowl 100 and the receiving bowl 200, so that the liquid sample can be filtered. The filtering membrane is a silver filtering membrane, and the type of the filtering membrane can be specifically selected according to the liquid sample to be filtered.
When the separation device is used, the filtering membrane is placed on the upper end face of the receiving cup 200, the filtering cup 100 is in butt joint with the receiving cup 200, the O-shaped flange ring is used for clamping and fixing, the lower end of the receiving cup 200 is connected with the solid extraction column, and the piston 500 is plugged in the liquid inlet of the liquid inlet pipe 201, so that the separation device is assembled. Connecting the lower end of the solid phase extraction column with a suction pump, pouring the liquid sample to be treated along the filter cup 100, starting the suction pump to provide power for filtering the liquid sample, enabling the liquid sample to continuously flow downwards, and disconnecting the solid phase extraction column 300 from the suction pump after the liquid sample completely flows through the filter membrane and passes through the enrichment of the solid phase extraction column 300. And (3) taking down the filter membrane fixed between the filter cup 100 and the receiving cup 200, and detecting the micro plastic particles on the silver filter membrane by using an infrared spectrometer or a Raman spectrometer. The piston 500 connected with the liquid inlet pipe 201 is taken down, the eluent of the solid phase extraction column 300 is injected through the liquid inlet pipe 201, the eluent of the solid phase extraction column 300 flows into the solid phase extraction column 300 under the action of gravity, the eluent flowing through the solid phase extraction column 300 is collected by a liquid phase small bottle at the liquid outlet at the lower end of the solid phase extraction column 300, and then the collected eluent of the solid phase extraction column 300 passes through a nylon filter membrane with the diameter of 0.22 mu m, and 20.0 mu L of direct sample injection is taken for UHPLC-MS/MS (ultra high performance liquid chromatography-mass spectrometry) detection.
The separation device can realize the rapid separation and enrichment of micro plastic particles and micromolecular migrants in the same food contact material sample, is convenient for subsequent detection and analysis, achieves the aim of simultaneously detecting the two substances, and improves the efficiency.
Taking micro plastic particles in a nylon tea bag and primary aromatic amine (micromolecular migration) in the tea bag as an example, the separation device of the embodiment is adopted for separation, and the specific steps are as follows:
connecting the lower end of the solid extraction column with a suction pump, starting the suction pump, taking out a tea bag soaked in 50mL of deionized water at 100 ℃ for 1h, cooling the tea water to room temperature (25 ℃), adjusting the pH of the tea water to 9.0 by using 0.1mol/L sodium hydroxide solution, then pouring the tea water along the cup wall of the filter cup 100, allowing the tea water to flow through a silver filter membrane under the power action of the suction pump, filtering micro plastic particles migrated from the tea bag on the silver filter membrane, pulling out the piston 500, dropping 6mL of acetonitrile along the liquid inlet pipe 201, collecting the extracted eluent from a liquid outlet at the lower end of the solid extraction column 300 by using a liquid phase vial, and thus completing the rapid separation of the micro plastic particles and the small molecular migrates simultaneously.
And (3) loosening the O-shaped flange ring, taking down the filter cup 100, clamping the filtered silver filter membrane by using a pair of tweezers, and detecting the filtered substances on the silver filter membrane by using a Nicolet In10 series micro-infrared spectrometer. The result is shown In fig. 3, the guidance function of the Nicolet In10 series micro infrared spectrometer automatically identifies the micro plastic particles, and the types, the infrared spectrogram and the particle number of the micro plastic particles can be obtained. As can be seen from the results, the nylon tea bag migrated a certain number of nylon particles and polypropylene particles after being soaked in water at 100 ℃ for 1 hour.
Filtering the collected eluent by a nylon 66 membrane with the diameter of 0.22 mu m, taking 20.0 mu L of the filtered eluent to directly sample for UHPLC-MS/MS detection. As a result, benzidine (FIG. 4, A) and aniline (FIG. 4, B) were detected in FIG. 4, and it was found that benzidine and aniline migrate from the bag made of nylon tea after soaking in water at 100 ℃ for 1 hour.
In conclusion, the separation device can be used for simultaneously separating micro plastic particles and micromolecular migrates, so that the subsequent detection is facilitated, and the efficiency is improved.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that the present invention is not limited to the details of the embodiments shown and described, but is capable of numerous equivalents and substitutions without departing from the spirit of the utility model as set forth in the claims appended hereto.
Claims (5)
1. A separation device for micro plastic particles and micromolecular migrates is characterized by comprising a filter bowl, a receiving bowl and a solid phase extraction column; the lower end of the filter cup is connected with the upper end of the receiving cup, a filtering membrane is arranged between the inner part of the lower end of the filter cup and the inner part of the upper end of the receiving cup, the lower end of the receiving cup is connected with the upper end of the solid-phase extraction column, and a liquid inlet pipe is arranged on the side wall of the receiving cup.
2. The separation device for micro plastic particles and small molecule migrates as claimed in claim 1, further comprising an O-ring flange ring, the O-ring flange ring comprising a first collet and a second collet hinged thereto, the first collet comprising a first handle and a first arcuate clamping arm, the second collet comprising a second handle and a second arcuate clamping arm, the lower end of the bowl being provided with a radially outward bowl flange, the upper end of the receiving bowl being provided with a radially outward receiving bowl flange, the first and second arcuate clamping arms clamping onto the bowl flange and the receiving bowl flange, respectively.
3. The separation device for micro plastic particles and small molecule migrates as claimed in claim 1, characterized in that the diameter of the filter membrane is slightly larger than the inner diameter of the lower end of the filter bowl and the inner diameter of the upper end of the receiving bowl, the filter membrane being a silver filter membrane.
4. The apparatus of claim 1 wherein said inlet pipe is integrally formed with said receiving cup.
5. The apparatus for separating micro plastic particles and small molecule migrates as claimed in claim 1, further comprising a piston connected to the liquid inlet of the liquid inlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121736641.5U CN216051034U (en) | 2021-07-28 | 2021-07-28 | Separating device for micro plastic particles and micromolecular migrates |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121736641.5U CN216051034U (en) | 2021-07-28 | 2021-07-28 | Separating device for micro plastic particles and micromolecular migrates |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216051034U true CN216051034U (en) | 2022-03-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121736641.5U Active CN216051034U (en) | 2021-07-28 | 2021-07-28 | Separating device for micro plastic particles and micromolecular migrates |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216051034U (en) |
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2021
- 2021-07-28 CN CN202121736641.5U patent/CN216051034U/en active Active
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