CN113687056A - Device and method for simulating the release and real-time collection of harmful substances in plastic products - Google Patents
Device and method for simulating the release and real-time collection of harmful substances in plastic products Download PDFInfo
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- CN113687056A CN113687056A CN202110858505.1A CN202110858505A CN113687056A CN 113687056 A CN113687056 A CN 113687056A CN 202110858505 A CN202110858505 A CN 202110858505A CN 113687056 A CN113687056 A CN 113687056A
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- 239000000126 substance Substances 0.000 title claims abstract description 52
- 239000004033 plastic Substances 0.000 title claims abstract description 50
- 229920003023 plastic Polymers 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000004088 simulation Methods 0.000 claims abstract description 117
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000001301 oxygen Substances 0.000 claims abstract description 40
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 40
- 238000005286 illumination Methods 0.000 claims abstract description 24
- 230000007613 environmental effect Effects 0.000 claims description 43
- 238000006243 chemical reaction Methods 0.000 claims description 28
- 239000002184 metal Substances 0.000 claims description 28
- 239000010453 quartz Substances 0.000 claims description 25
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 25
- 230000005540 biological transmission Effects 0.000 claims description 23
- 230000001105 regulatory effect Effects 0.000 claims description 22
- 230000004888 barrier function Effects 0.000 claims description 18
- 238000002414 normal-phase solid-phase extraction Methods 0.000 claims description 15
- 238000005276 aerator Methods 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 8
- 239000002699 waste material Substances 0.000 claims description 8
- 229910001220 stainless steel Inorganic materials 0.000 claims description 7
- 239000010935 stainless steel Substances 0.000 claims description 7
- 238000000605 extraction Methods 0.000 claims description 6
- 239000011521 glass Substances 0.000 claims description 5
- 239000011148 porous material Substances 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 claims description 2
- 230000000903 blocking effect Effects 0.000 claims 1
- 238000011156 evaluation Methods 0.000 abstract 1
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- 238000010586 diagram Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 230000005183 environmental health Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/44—Resins; Plastics; Rubber; Leather
- G01N33/442—Resins; Plastics
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- General Health & Medical Sciences (AREA)
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Abstract
The invention provides a device and a method for simulating the release and real-time collection of harmful substances in a plastic product. The device simulates the dissolved oxygen content of different environment media through the medium dissolved oxygen simulation control unit, the illumination type and the irradiation intensity in different environment scenes are simulated through the illumination simulation control unit, the medium flow velocity simulation is carried out on the release core area through the flow velocity simulation control unit, the temperature of different environment scenes is reduced through the temperature simulation control unit, and the light-shielding collection bin is adopted to enrich the harmful substances released by the sample in real time, so that the requirements of dynamic analysis on the harmful substances released by the sample and more objective and real environment risk evaluation on different plastic products are met.
Description
Technical Field
The invention relates to the field of simulation detection of environmental pollution, in particular to a device and a method for simulating release and real-time collection of harmful substances of plastic products.
Background
The use scale of plastic products has increased year by year in recent years, covering almost every field of human life. The plastic products are used as polymer materials, and additives such as plasticizers, flame retardants, antioxidants and the like added in the production process of the polymer materials are hundreds of, and most of the additives are proved to be directly threatening the environmental health. The release of harmful substances from plastic products in the fields of food safety, medical and health, etc. has been incorporated into government regulatory systems and there are corresponding detection methods and simulation devices. The detection and risk assessment of the release of harmful substances by plastic articles in the field of environmental monitoring is in the beginning stage but has received extensive attention.
Because the difference between the environmental condition simulation and the food and drug storage condition simulation is large, the mature related simulation device and the collection mode can not achieve the expectation of simulating the environmental conditions. The main reasons are the following two points: first, environmental factors are complex and diverse. The long exposure period of the plastic article to the environment requires that the simulated release device simulate as much as possible the actual environmental factors, and also has the capability of accelerating the aging of the plastic to evaluate the dynamic change of the release of the harmful substance of the plastic article exposed to the environment for a long time. Second, the collection of the released hazardous substances is not versatile. The simulated release mode for accelerating the aging of plastics is often accompanied by extreme climatic conditions such as high temperature, high light intensity and the like. The traditional accumulation collection mode aims at accumulating and fixedly releasing harmful substances in a reaction area, and the released harmful substances can stay in a simulated environment for a long time, so that the conversion and decomposition are inevitable. Therefore, the simulation and collection device can not only meet the simulation of various environmental factors, but also effectively avoid the transformation and decomposition of the released harmful substances, still belongs to the blank of the detection field, and needs to be filled.
Disclosure of Invention
The invention aims to provide a device and a method for simulating the release and real-time collection of harmful substances of plastic products, so as to meet the requirements of simulating various environmental factors and effectively avoiding the conversion and decomposition of the released harmful substances.
In order to realize the purpose, the invention adopts the following technical scheme:
device of simulation plastic products harmful substance release and real-time collection, its characterized in that includes:
the simulated medium storage pool is used for storing simulated environment media;
the medium dissolved oxygen simulation control unit is used for adjusting the dissolved oxygen content of the simulated environment medium in the simulated medium storage tank (1);
the medium transmission pipeline is used for transmitting a simulated environment medium;
the release simulation bin is used for simulating the release condition of harmful substances of the plastic sample under various environmental scenes;
the light-shading collection bin is used for accurately collecting harmful substances released by the plastic sample in real time under the condition of eliminating interference of simulation factors;
the simulated medium storage pool, the release simulation bin and the light-proof collection bin are sequentially connected through the medium transmission pipeline.
Further:
the medium dissolved oxygen simulation control unit comprises an air pump, an air flow regulating valve, a metal pipeline, a pore aerator, a dissolved oxygen monitor and a dissolved oxygen sensor;
the air pump and the dissolved oxygen monitor are positioned outside the simulated medium storage pool;
the pore aerator and the dissolved oxygen sensor are immersed in the simulated environmental medium stored in the simulated medium storage tank;
the air pump is connected with the fine hole aerator through the metal pipeline;
the gas flow regulating valve is arranged on the metal pipeline and is used for regulating the gas flow of the fine-hole aerator;
the dissolved oxygen monitor is in linear connection with the dissolved oxygen sensor.
Further:
the medium transmission pipeline comprises a filter, a water flow regulating valve and a stainless steel pipeline;
the filter is immersed in simulated environmental media stored in the simulated media storage tank;
the stainless steel pipeline is used for transmitting a simulated environment medium;
and the water flow regulating valve is used for controlling the transmission speed of the simulated environment medium.
Further:
the release simulation bin comprises a sample release simulation tube, a temperature simulation control unit, a flow rate simulation control unit and an illumination simulation control unit;
the sample release simulation tube is respectively connected with the simulation medium storage pool and the light-proof collection bin through the medium transmission pipeline and is used for containing a plastic product sample and a simulation environment medium;
the temperature simulation control unit is used for simulating the temperatures of different environmental scenes;
the flow velocity simulation control unit is used for simulating the flow velocity of the medium under different environmental scenes;
the illumination simulation control unit is used for simulating illumination types and intensities of different environmental scenes.
Further:
the sample release simulation tube comprises a sealing plug, a quartz reaction tube and a metal barrier net;
the sealing plug is used for plugging the opening of the quartz reaction tube, and the medium transmission pipeline connected with the simulation medium storage pool and the light-proof collection bin penetrates through the sealing plug and opens into the quartz reaction tube;
the metal barrier mesh is immersed in a simulated environmental medium.
Further:
the quartz reaction tube is vertically arranged;
the metal barrier net is arranged in the middle of the quartz reaction tube;
the opening of the medium transmission pipeline connected with the light-resistant collection bin is arranged above the metal barrier net, and the medium transmission pipeline connected with the simulated medium storage tank penetrates through the opening of the metal barrier net to be arranged at the bottom of the quartz reaction tube.
Further:
the temperature sensor and the temperature control heating plate which are contained in the temperature simulation control unit are respectively arranged below the metal barrier net and the sample release simulation tube, and the temperature control heating plate is contacted with the sample release simulation tube;
the magnetic stirrer and the glass rotor which are contained in the flow rate simulation control unit are respectively arranged below the temperature control heating plate and at the bottom of the quartz reaction tube;
the light source and the light intensity controller contained in the illumination simulation control unit are respectively arranged on two sides of the sample release simulation tube and one side of the magnetic stirrer, and the light intensity controller is used for adjusting light intensity.
Further:
the light-resistant collection bin comprises a light shield, a solid-phase extraction column, an extraction flow regulating valve, a vacuum tank, a rubber pipeline, a waste liquid collection tank and a vacuum pump;
the light shield is arranged on the periphery of the rest parts of the light-proof collecting bin;
the solid phase extraction column is connected with the release simulation bin through the medium transmission pipeline and is used for enriching harmful substances in a simulation environment medium;
the solid phase extraction column, the extraction flow regulating valve and the vacuum tank are sequentially connected;
the waste liquid collecting tank is respectively connected with the vacuum groove and the vacuum pump through the rubber pipeline.
The invention also provides a method for simulating the release and real-time collection of harmful substances in plastic products, which is characterized by comprising the following steps:
s1, placing the plastic product sample in the release simulation bin;
s2, simulating the dissolved oxygen content of different environment media through the medium dissolved oxygen simulation control unit;
s3, simulating the temperatures of different environmental scenes through the temperature simulation control unit;
s4, simulating the flowing speed of the medium under different environmental scenes through the flow speed simulation control unit;
and S5, simulating the illumination types and intensities of different environmental scenes through the illumination simulation control unit.
And S6, accurately collecting harmful substances released by the plastic product sample in real time through the light-proof collection bin under the condition of eliminating interference of simulation factors.
Further:
in step S6, after the user-defined simulation time period is reached, the enriched compounds in the solid phase extraction column are harmful substances released from the plastic product sample collected in real time.
The invention has the following beneficial effects:
the device and the method for simulating the release and the real-time collection of the harmful substances of the plastic products can realize the simulation of more real environmental conditions by simulating the dissolved oxygen content of different environmental media, the illumination type and the illumination intensity in different environmental scenes, the flow rate of different media and the temperature in different environmental scenes;
according to the invention, the light-proof collection bin is adopted to perform real-time enrichment on harmful substances released by the sample, so that the conversion and decomposition of the harmful substances are avoided, and the dynamic process of the harmful substances released from the plastic product can be captured and analyzed;
according to the invention, the harmful substances enriched by the solid-phase extraction column can be transferred to a certain amount of organic solvent for subsequent targeted instrument detection, so that the harmful substances which are not listed in important monitoring at present can be more efficiently discovered, and the plastic product can be objectively and truly evaluated for environmental risk.
Drawings
FIG. 1 is a schematic structural diagram of a device for simulating the release and real-time collection of harmful substances in a plastic product according to an embodiment of the invention;
fig. 2 is a schematic diagram of a release simulation bin structure in an embodiment in accordance with the invention.
Reference numerals:
1. a simulated media storage tank; 2. a medium dissolved oxygen simulation control unit; 21. an air pump; 22. an airflow regulating valve; 23. a metal pipeline; 24. a fine-meshed aerator; 25. a dissolved oxygen monitor; 26. a dissolved oxygen sensor; 3. a medium transfer line; 31. a filter; 32. a water flow regulating valve; 33. stainless steel piping; 4. releasing the simulation bin; 41. a sample release analogue tube; 411. a sealing plug; 412. a quartz reaction tube; 413. a metal barrier net; 42. a temperature simulation control unit; 421. a temperature sensor; 422. a temperature control heating plate; 43. a flow rate analog control unit; 431. a magnetic stirrer; 432. a glass rotor; 44. an illumination simulation control unit; 441. a light source; 442. a light intensity controller; 45. a plastic product sample; 5. a light-resistant collection bin; 51. a light shield; 52. a solid phase extraction column; 53. an extraction flow regulating valve; 54. a vacuum tank; 55. a rubber pipeline; 56. a waste liquid collection tank; 561. a sealing plug, 562 and a tank body; 57. a vacuum pump.
Detailed Description
The invention is further described in the following by means of specific embodiments in conjunction with the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The embodiment of the invention provides a device for simulating the release of harmful substances in plastic products in various environments, which specifically comprises the following components as shown in fig. 1:
the simulated medium storage tank 1 is used for storing simulated environment media, and specific media types can be different media such as deionized water, natural river water, natural seawater and the like according to different environmental scenes;
and the medium dissolved oxygen simulation control unit 2 is used for adjusting the dissolved oxygen content of the simulated environment medium to enable the dissolved oxygen content to reach the medium dissolved oxygen concentration in the simulated environment scene.
And the release simulation bin 4 simulates the release condition of harmful substances of the plastic samples in various environmental scenes by adjusting the medium flow speed, the medium temperature, the light source types and the illumination intensity in the environment where the samples are located.
And the light-proof collection bin 5 is used for collecting samples transmitted by the medium in real time in a light-proof environment in a solid-phase extraction mode to release harmful substances.
The simulation medium storage tank 1, the release simulation bin 4 and the light-resistant collection bin 5 are sequentially connected through a medium transmission pipeline 3.
In a preferred embodiment, the medium dissolved oxygen simulation control unit 2 consists of an air pump 21, an air flow regulating valve 22, a metal pipeline 23, a fine-pore aerator 24, a dissolved oxygen monitor 25 and a dissolved oxygen sensor 26; wherein the air pump 21 is connected with a fine hole aerator 24 through the metal pipeline 23; the dissolved oxygen monitor 25 is connected to a dissolved oxygen sensor 26. The fine pore aerator 24 and the dissolved oxygen sensor 26 are immersed in the simulated environmental media stored in the simulated media storage tank 1.
In the preferred embodiment, the medium transfer line 3 is composed of a filter 31, a water flow rate regulating valve 32, and a stainless steel line 33; the filter 31 is immersed in simulated environmental media stored in the simulated media reservoir 1. The water flow regulating valve 32 can control the transmission speed of the simulated environment medium, and the stainless steel pipeline 33 is used for transmitting the simulated environment medium. Specifically, the filter 31 is a needle type nylon filter.
In a preferred embodiment, as shown in fig. 2, the release simulation chamber 4 is composed of a sample release simulation tube 41, a temperature simulation control unit 42, a flow rate simulation control unit 43, and an illumination simulation control unit 44. The sample release simulation tube 41 is a main structure and is arranged in the center of the release simulation bin 4 and used for containing a plastic product sample 45 and a simulation release medium. The temperature simulation control unit 42 is used for simulating the temperatures of different environmental scenes. The flow rate simulation control unit 43 is used to simulate flow rates in different environmental scenarios. The illumination simulation control unit 44 is used for simulating different environmental scene light illumination situations.
In a preferred embodiment, the sample release simulation tube 41 is composed of a sealing plug 411, a quartz reaction tube 412 and a metal barrier net 413, the sealing plug 411 is used for sealing the opening of the quartz reaction tube 412, the medium transmission pipeline 3 connected with the simulation medium storage tank 1 and the light-proof collection chamber 5 passes through the sealing plug 411 and extends to the inside of the quartz reaction tube 412, and the metal barrier net 413 is immersed in a simulation environment medium. Specifically, the quartz reaction tube 412 is a cylindrical quartz container.
In a preferred embodiment, the temperature simulation control unit 42 comprises a temperature sensor 421 and a temperature-controlled heating plate 422, the temperature sensor 421 is disposed under the metal barrier net 413, and the temperature-controlled heating plate 422 is disposed right under and in contact with the sample release simulation tube 41. The flow rate simulation control unit 43 is composed of a magnetic stirrer 431 and a glass rotor 432, the magnetic stirrer 431 is disposed below the temperature control heating plate 422, and the glass rotor 432 is disposed at the bottom of the quartz reaction tube 412. The light irradiation simulation control unit 44 includes a light source 441 and a light intensity controller 442, the light source 441 is disposed on both sides of the sample release simulation tube 41, and the light intensity controller 442 is disposed on one side of the magnetic stirrer 431, and light irradiation situations of different environmental scenes can be simulated by replacing the type of the light source 441 and adjusting the light intensity using the light intensity controller 442.
In a preferred embodiment, the quartz reaction tube 412 is vertically arranged, the metal barrier mesh 413 is arranged in the middle of the quartz reaction tube 412, the medium transmission pipeline 3 connected with the light-shielding collection bin 5 is opened above the metal barrier mesh 413, and the medium transmission pipeline 3 connected with the simulated medium storage tank 1 passes through the metal barrier mesh 413 and is opened at the bottom of the quartz reaction tube 412.
In the preferred embodiment, the light-shielding collection chamber 5 is composed of a light-shielding cover 51, a solid phase extraction column 52, an extraction flow regulating valve 53, a vacuum tank 54, a rubber pipeline 55, a waste liquid collection tank 56 and a vacuum pump 57. After the simulated environment medium flows through the release simulation bin 4, the sample release substances are transmitted to the light-proof collection bin 5 in real time, and real-time enrichment is achieved through the solid phase extraction column 52. After the simulated release process is finished, all waste liquid is collected in the waste liquid collecting tank 56 for subsequent harmless treatment, and the solid-phase extraction column 52 releases harmful substances after the elution process and transfers the harmful substances to a certain amount of organic solvent for subsequent targeted instrument detection. Specifically, the light shield 51 is a rectangular parallelepiped hollow box made of light shielding plates, and is disposed around the rest of the components of the light shielding collection chamber 5.
The embodiment of the invention also provides a method for simulating the release and real-time collection of harmful substances in a plastic product, which comprises the following steps of;
placing a plastic product sample 45 inside the quartz reaction tube 412;
and simulating the dissolved oxygen content of different environment media by the medium dissolved oxygen simulation control unit 2.
Simulating the temperatures of different environmental scenes by the temperature simulation control unit 42;
the flow velocity of the medium in different environmental scenes is simulated by the flow velocity simulation control unit 43.
The illumination type and intensity of different environmental scenes are simulated by the illumination simulation control unit 44.
And collecting harmful substances released by the plastic product sample 45 in real time through the light-shielding collection chamber 5.
Further, the enriched compounds in the solid phase extraction column 52 are harmful substances released from the plastic product sample 45 collected in real time after the custom simulation time period is reached.
The background of the present invention may contain background information related to the problem or environment of the present invention and does not necessarily describe the prior art. Accordingly, the inclusion in the background section is not an admission of prior art by the applicant.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several equivalent substitutions or obvious modifications can be made without departing from the spirit of the invention, and all the properties or uses are considered to be within the scope of the invention.
Claims (10)
1. Device of simulation plastic products harmful substance release and real-time collection, its characterized in that includes:
the simulated medium storage pool (1) is used for storing simulated environment media;
the medium dissolved oxygen simulation control unit (2) is used for adjusting the dissolved oxygen content of the simulated environment medium in the simulated medium storage tank (1);
the medium transmission pipeline (3) is used for transmitting a simulated environment medium;
the release simulation bin (4) is used for simulating the release condition of harmful substances of the plastic sample under various environmental scenes;
the light-shading collection bin (5) is used for accurately collecting harmful substances released by the plastic sample in real time under the condition of eliminating interference of simulation factors;
the simulation medium storage pool (1), the release simulation bin (4) and the light-proof collection bin (5) are sequentially connected through the medium transmission pipeline (3).
2. The device for simulating harmful substance release and real-time collection of plastic products according to claim 1, wherein the medium dissolved oxygen simulation control unit (2) comprises an air pump (21), an air flow regulating valve (22), a metal pipeline (23), a fine hole aerator (24), a dissolved oxygen monitor (25), and a dissolved oxygen sensor (26);
the air pump (21) and the dissolved oxygen monitor (25) are positioned outside the simulated medium storage pool (1);
the fine-hole aerator (24) and the dissolved oxygen sensor (26) are immersed in the simulated environmental medium stored in the simulated medium storage tank (1);
the air pump (21) is connected with the fine pore aerator (24) through the metal pipeline (23);
the air flow regulating valve (22) is arranged on the metal pipeline (23) and is used for regulating the air flow of the fine-hole aerator (24);
the dissolved oxygen monitor (25) is in linear connection with the dissolved oxygen sensor (26).
3. The device for simulating the release and the real-time collection of harmful substances in plastic products according to claim 1, wherein the medium transmission pipeline (3) comprises a filter (31), a water flow regulating valve (32) and a stainless steel pipeline (33);
the filter (31) is immersed in simulated environmental media stored in the simulated media storage tank (1);
the stainless steel pipeline (33) is used for transmitting simulated environment media;
the water flow regulating valve (32) is used for controlling the transmission speed of the simulated environment medium.
4. The device for simulating harmful substance release and real-time collection of plastic products according to claim 1, wherein the release simulation chamber (4) comprises a sample release simulation tube (41), a temperature simulation control unit (42), a flow rate simulation control unit (43) and an illumination simulation control unit (44);
the sample release simulation tube (41) is respectively connected with the simulation medium storage pool (1) and the light-proof collection bin (5) through the medium transmission pipeline (3) and is used for containing a plastic product sample (45) and a simulation environment medium;
the temperature simulation control unit (42) is used for simulating the temperatures of different environmental scenes;
the flow velocity simulation control unit (43) is used for simulating the flow velocity of the medium under different environmental scenes;
the illumination simulation control unit (44) is used for simulating illumination types and intensities of different environmental scenes.
5. The apparatus for simulating harmful substance release and real-time collection of plastic products according to claim 4, wherein the sample release simulation tube (41) comprises a sealing plug (411), a quartz reaction tube (412) and a metal blocking net (413);
the sealing plug (411) is used for plugging the opening of the quartz reaction tube (412), and the medium transmission pipeline (3) connected with the simulation medium storage pool (1) and the light-proof collection bin (5) penetrates through the sealing plug (411) and opens into the quartz reaction tube (412);
the metal barrier mesh (413) is immersed in a simulated environmental medium.
6. The apparatus for simulating the release and real-time collection of harmful substances in plastic products according to claim 5, wherein the quartz reaction tube (412) is vertically placed;
the metal barrier net (413) is arranged in the middle of the quartz reaction tube (412);
the opening of the medium transmission pipeline (3) connected with the light-resistant collection bin (5) is arranged above the metal barrier net (413), and the medium transmission pipeline (3) connected with the simulation medium storage tank (1) penetrates through the opening of the metal barrier net (413) and is arranged at the bottom of the quartz reaction tube (412).
7. The device for simulating harmful substance release and real-time collection of plastic products according to claim 4, wherein the temperature simulation control unit (42) comprises a temperature sensor (421) and a temperature control heating plate (422) respectively disposed under the metal barrier net (413) and the sample release simulation tube (41), and the temperature control heating plate (422) is in contact with the sample release simulation tube (41);
a magnetic stirrer (431) and a glass rotor (432) which are contained in the flow rate simulation control unit (43) are respectively arranged below the temperature control heating plate (422) and at the bottom of the quartz reaction tube (412);
the light source (441) and the light intensity controller (442) which are contained by the illumination simulation control unit (44) are respectively arranged at two sides of the sample release simulation tube (41) and one side of the magnetic stirrer (431), and the light intensity controller (442) is used for adjusting the light intensity.
8. The device for simulating the release and real-time collection of harmful substances in plastic products according to claim 1, wherein the light-proof collection bin (5) comprises a light-proof shield (51), a solid-phase extraction column (52), an extraction flow regulating valve (53), a vacuum tank (54), a rubber pipeline (55), a waste liquid collection tank (56) and a vacuum pump (57);
the light shield (51) is arranged at the periphery of the rest parts of the light-proof collecting bin (5);
the solid phase extraction column (52) is connected with the release simulation bin (4) through the medium transmission pipeline (3) and is used for enriching harmful substances in a simulated environment medium;
the solid phase extraction column (52), the extraction flow regulating valve (53) and the vacuum tank (54) are connected in sequence;
the waste liquid collecting tank (56) is respectively connected with the vacuum groove (54) and the vacuum pump (57) through the rubber pipeline (55).
9. A method for simulating the release and real-time collection of harmful substances in plastic products is characterized by comprising the following steps:
s1, placing the plastic product sample (45) in the release simulation bin (4);
s2, simulating the dissolved oxygen content of different environment media through the medium dissolved oxygen simulation control unit (2);
s3, simulating the temperatures of different environmental scenes through the temperature simulation control unit (42);
s4, simulating the flowing speed of the medium under different environmental scenes through the flow speed simulation control unit (43);
and S5, simulating the illumination type and the illumination intensity of different environmental scenes through the illumination simulation control unit (44).
S6, collecting the harmful substances released by the plastic product sample (45) through the light-proof collecting bin (5) accurately in real time under the condition of eliminating the interference of simulation factors.
10. The method for simulating the release and real-time collection of the harmful substances in the plastic products is characterized in that in step S6, after the user-defined simulation time is reached, the enriched compounds in the solid-phase extraction column (52) are the harmful substances released by the plastic product samples (45) collected in real time.
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| CN202110858505.1A CN113687056B (en) | 2021-07-28 | 2021-07-28 | Device and method for simulating release and real-time collection of harmful substances in plastic products |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115097074A (en) * | 2022-06-28 | 2022-09-23 | 清华大学深圳国际研究生院 | A simulation device and experimental method for the release of harmful substances in cosmetics |
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