CN113281126A - Pretreatment method for detection of heavy metals in cosmetics - Google Patents
Pretreatment method for detection of heavy metals in cosmetics Download PDFInfo
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- CN113281126A CN113281126A CN202110677875.5A CN202110677875A CN113281126A CN 113281126 A CN113281126 A CN 113281126A CN 202110677875 A CN202110677875 A CN 202110677875A CN 113281126 A CN113281126 A CN 113281126A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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Abstract
The invention discloses a pretreatment method for heavy metal detection in cosmetics, which relates to the technical field of cosmetic detection, and provides the following scheme aiming at the problem that the prior process for heavy metal detection in the existing cosmetics is complex, wherein the method comprises the following steps: the cosmetics that treat the measuring take a sample, place the cosmetics of sample into corresponding firing equipment, carry out water bath heating treatment through firing equipment to the cosmetics of sample, after the inside cosmetics sample of firing equipment dissolves completely, place the paper membrane that adsorbs heavy metal ion in the cosmetics sample after completely dissolving. The cosmetic treatment device can rapidly treat the cosmetics, so that a user can conveniently detect the heavy metals in the cosmetics, the treatment method is simple, the used equipment is convenient to use, the progress of heavy metal detection in the cosmetics is effectively improved, and the detection efficiency of the heavy metals in the cosmetics is effectively improved.
Description
Technical Field
The invention relates to the technical field of cosmetic detection, in particular to a pretreatment method for detecting heavy metals in cosmetics.
Background
Cosmetic means a formulation intended for use on the human body for the purpose of beautifying, preserving or modifying the appearance of the human body, or for the purpose of cleaning, dyeing, wiping, correcting or protecting the skin, hair, nails, eyes or teeth.
In the production process of cosmetics, the heavy metal content in the cosmetics needs to be detected, although the existing cosmetic heavy metal detection mode can be used for detecting the heavy metal content in the cosmetics, the defects that the time spent before detection is long, the process is complex, and the required equipment is inconvenient to use exist, and therefore a pretreatment method for detecting the heavy metal in the cosmetics is provided.
Disclosure of Invention
The invention provides a pretreatment method for detecting heavy metals in cosmetics, which solves the problem that the procedures before detection of heavy metals in cosmetics are complex.
In order to achieve the purpose, the invention adopts the following technical scheme:
a pretreatment method for detecting heavy metals in cosmetics comprises the following steps:
s1: sampling the cosmetics to be detected, placing the sampled cosmetics into corresponding heating equipment, and carrying out water bath heating treatment on the sampled cosmetics through the heating equipment;
s2: after the cosmetic sample in the heating device is completely dissolved, placing the paper film for adsorbing the heavy metal ions into the completely dissolved cosmetic sample, and adsorbing the heavy metal ions in the cosmetic sample through the paper film;
s3: after the paper film is placed in the cosmetic sample for 30 minutes, the paper film in the cosmetic sample can be taken out;
s4: placing the paper film obtained in the step S3 into corresponding drying equipment, and drying the paper film through the drying equipment;
s5: and taking the dried paper film out of the drying equipment, storing and transporting the dried paper film, conveying the dried paper film into the detection mechanism, and detecting the content of heavy metals in the paper film through the detection equipment in the detection mechanism.
Preferably, treatment chamber and heating chamber have been seted up to firing equipment's inside, a plurality of mounting grooves corresponding with the heating chamber have been seted up at firing equipment's top, the test tube is worn to be equipped with in the inside of mounting groove all slides, the inside sliding connection in heating chamber has the loading board, a plurality of holes of permeating water have been seted up to the loading board, firing equipment is equipped with and is used for driving the loading board to carry out the drive assembly of displacement, a plurality of bearing grooves corresponding with the test tube have been seted up at the top of loading board, the bottom of test tube is inside corresponding bearing groove sliding connection respectively, the inner wall of heating chamber bottom is fixed with a plurality of heating pipes, the water injection valve is installed at firing equipment's top, the water injection valve is linked together with the heating chamber, the inside in heating chamber is fixed with the filter screen, the filter screen is located between water injection valve and the loading board.
Preferably, the bottom of one end of the heating device is provided with a water outlet pipe, and the middle part of the water outlet pipe is provided with a butterfly valve.
Preferably, the driving assembly comprises a threaded column positioned below the bearing plate, one end of the threaded column is rotatably connected to the inner wall of the treatment cavity through a bearing, the other end of the threaded column is rotatably connected to the inner wall of the heating cavity through a bearing, threads are formed in the outer walls of the two ends of the threaded column positioned in the heating cavity, the thread directions are opposite, a driving sleeve is sleeved on the outer walls of the two ends of the threaded column positioned in the heating cavity in a threaded manner, the outer sides of the driving sleeve are hinged to a connecting rod through hinges, the other end of the connecting rod is hinged to the outer side of the bearing plate through a hinge, a stepping motor is fixed to the inner wall of the top of the treatment cavity, a worm is connected to the output end of the stepping motor in a transmission manner, the other end of the worm is rotatably connected to the inner wall of the bottom of the treatment cavity through a bearing, and a first worm wheel is fixedly sleeved on the outer wall of the threaded column positioned in the treatment cavity, the worm and the work of first worm wheel meshing, the screw thread post both sides outer wall that is located heating intracavity portion all is fixed with rotates the cover and establishes the cleaning brush in heating intracavity portion, the brush hair of cleaning brush contacts with the filter screen, the cleaning brush is located one side that the filter screen is close to the water injection valve.
Preferably, the below of screw thread post is equipped with the pivot, the one end of pivot is passed through the bearing and is rotated the connection on the inner wall of treatment chamber, the other end of pivot passes through the bearing and rotates the connection on the filter screen, and the pivot outer wall that is located heating intracavity portion is fixed with a plurality of rotation covers and establishes the stirring rod in heating intracavity portion, and the pivot outer wall that is located treatment chamber portion is fixed with the second worm wheel that has cup jointed, second worm wheel and worm meshing work.
Preferably, one side of the outside of the heating device is hinged with a movable door through a hinge, the outer wall of the movable door is provided with a sealing ring along the circumferential direction, and the movable door corresponds to the treatment cavity and the heating cavity.
Preferably, the inner wall between processing chamber and the heating chamber is seted up with corresponding commentaries on classics hole of screw thread post and pivot, screw thread post and pivot rotate the cover respectively and establish at corresponding commentaries on classics downthehole portion, the inner wall in commentaries on classics hole is equipped with the rubber circle along circumference.
Preferably, the middle part of the filter screen is provided with a transfer hole, and the threaded column is rotatably connected inside the transfer hole.
In the invention:
1. the cosmetic treatment device can rapidly treat the cosmetics, so that a user can conveniently detect the heavy metals in the cosmetics, the treatment method is simple, the used equipment is convenient to use, the progress of heavy metal detection in the cosmetics is effectively improved, and the detection efficiency of the heavy metals in the cosmetics is effectively improved.
2. The rapid water bath heating device can rapidly heat the detected cosmetics in a water bath, so that a user can conveniently extract the cosmetics sample, the heating device can be flexibly adjusted according to the size of the sample test tube, the flexibility is high, the water liquid in the heating device can be stirred, the average temperature of the water liquid in the heating device is effectively increased, the problems that the bottom of the water liquid in the heating device is hot and the top of the water liquid is cold are solved, and the dissolving rate of the cosmetics is effectively increased; on the other hand can carry out filtration treatment to the inside water liquid of firing equipment, then the purity of the inside water liquid of effectual improvement firing equipment to can clean firing equipment's filter unit, thereby avoid filter unit after long-time cleaning work, filter unit's filtration pore is blockked up by the impurity in the water liquid, and the time of endurance is long.
Drawings
FIG. 1 is a schematic structural diagram of a heating device in a pretreatment method for detecting heavy metals in cosmetics according to the present invention;
FIG. 2 is a schematic structural diagram of a connecting rod in the pretreatment method for detecting heavy metals in cosmetics provided by the invention;
fig. 3 is a front view of a heating device in the pretreatment method for detecting heavy metals in cosmetics according to the present invention.
Reference numbers in the figures: 1. a heating device; 2. a treatment chamber; 3. a heating cavity; 4. mounting grooves; 5. a test tube; 6. a carrier plate; 7. a bearing groove; 8. heating a tube; 9. a filter screen; 10. a water injection valve; 11. a water outlet pipe; 12. a threaded post; 13. a drive sleeve; 14. a connecting rod; 15. a stepping motor; 16. a worm; 17. a first worm gear; 18. a rotating shaft; 19. a stirring rod; 20. a second worm gear; 21. a cleaning brush; 22. a movable door.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-3, a pretreatment method for heavy metal detection in cosmetics comprises the following steps:
s1: sampling the cosmetics to be detected, placing the sampled cosmetics into corresponding heating equipment 1, and carrying out water bath heating treatment on the sampled cosmetics through the heating equipment 1;
s2: after the cosmetic sample in the heating device 1 is completely dissolved, placing the paper film adsorbing the heavy metal ions into the completely dissolved cosmetic sample, and adsorbing the heavy metal ions in the cosmetic sample through the paper film;
s3: after the paper film is placed in the cosmetic sample for 30 minutes, the paper film in the cosmetic sample can be taken out;
s4: placing the paper film obtained in the step S3 into corresponding drying equipment, and drying the paper film through the drying equipment;
s5: and taking the dried paper film out of the drying equipment, storing and transporting the dried paper film, conveying the dried paper film into the detection mechanism, and detecting the content of heavy metals in the paper film through the detection equipment in the detection mechanism.
The bottom of 1 one end of heating equipment is installed outlet pipe 11, and the mid-mounting of outlet pipe 11 has the butterfly valve, and through opening the butterfly valve, accessible outlet pipe 11 discharges the inside water liquid in heating chamber 3.
The driving assembly comprises a threaded column 12 positioned below the bearing plate 6, one end of the threaded column 12 is rotatably connected to the inner wall of the treatment cavity 2 through a bearing, the other end of the threaded column 12 is rotatably connected to the inner wall of the heating cavity 3 through a bearing, threads are respectively arranged on the outer walls of the two ends of the threaded column 12 positioned in the heating cavity 3, the thread directions are opposite, a driving sleeve 13 is sleeved on the outer wall of the two ends of the threaded column 12 positioned in the heating cavity 3 in a threaded manner, the outer side of the driving sleeve 13 is hinged with a connecting rod 14 through a hinge, the other end of the connecting rod 14 is hinged to the outer side of the bearing plate 6 through a hinge, a stepping motor 15 is fixed on the inner wall of the top of the treatment cavity 2, the stepping motor 15 is a forward and reverse rotating motor, the output end of the stepping motor 15 is in transmission connection with a worm 16, the other end of the worm 16 is rotatably connected to the inner wall of the bottom of the treatment cavity 2 through a bearing, a first worm wheel 17 is fixedly sleeved on the outer wall of the threaded column 12 positioned in the treatment cavity 2, the worm 16 and the first worm wheel 17 are meshed to work, the outer walls of two sides of the threaded column 12 positioned in the heating cavity 3 are respectively fixed with a cleaning brush 21 which is rotatably sleeved in the heating cavity 3, bristles of the cleaning brush 21 are in contact with the filter screen 9, and the cleaning brush 21 is positioned on one side of the filter screen 9 close to the water injection valve 10.
The below of screw thread post 12 is equipped with pivot 18, and the one end of pivot 18 is passed through the bearing and is rotated the connection on the inner wall of treatment chamber 2, and the other end of pivot 18 passes through the bearing and rotates the connection on filter screen 9, and the 18 outer walls of pivot that is located heating chamber 3 inside are fixed with a plurality of rotation covers and establish the stirring rod 19 in heating chamber 3, and the 18 outer walls of pivot that is located treatment chamber 2 inside are fixed to be cup jointed second worm wheel 20, and second worm wheel 20 and worm 16 meshing work.
One side of the outside of the heating device 1 is hinged with a movable door 22 through a hinge, the outer wall of the movable door 22 is provided with a sealing ring along the circumferential direction, the movable door 22 corresponds to the treatment cavity 2 and the heating cavity 3, and the movable door 22 is opened, so that a user can conveniently overhaul and maintain the parts in the treatment cavity 2 and the heating cavity 3.
The inner wall between the processing cavity 2 and the heating cavity 3 is provided with a rotary hole corresponding to the threaded column 12 and the rotary shaft 18, the threaded column 12 and the rotary shaft 18 are respectively sleeved in the corresponding rotary hole in a rotating way, the inner wall of the rotary hole is provided with a rubber ring along the circumferential direction, and the threaded column 12 and the rotary shaft 18 can flexibly rotate through the rotary hole.
The switch hole has been seted up at the middle part of filter screen 9, and screw post 12 rotates to be connected in the inside of switch hole, and through the switch hole, screw post 12 can carry out nimble rotation.
The working principle is as follows: the cosmetic taking-out component to be detected is used for placing the taken-out cosmetic into the test tube 5, the corresponding position of the bearing plate 6 can be adjusted according to the size of the test tube 5, the worm 16 can be driven to rotate by the operation of the stepping motor 15, the first worm wheel 17 can be driven to rotate by the rotating worm 16, the threaded column 12 can be driven to rotate by the rotating first worm wheel 17, the driving sleeve 13 can be driven to displace, the connecting rod 14 can be driven to deflect by the displaced driving sleeve 13, the bearing plate 6 can be driven to vertically displace by the deflected connecting rod 14, the corresponding position of the bearing plate 6 can be adjusted by a user, the stepping motor 15 stops operating after the corresponding position of the bearing plate 6 is adjusted by the user, and the corresponding position of the bearing plate 6 is fixed, at this time, the user can insert the test tube 5 containing the cosmetics into the mounting groove 4, after the bottom of the test tube 5 enters the corresponding bearing groove 7 of the bearing plate 6, sufficient water can be injected into the heating chamber 3 through the water injection valve 10, the water injected into the heating chamber 3 can be filtered by the filter screen 9, the purity of the water in the heating chamber 3 can be effectively improved, the water in the heating chamber 3 can be heated through the operation of the heating pipe 8, the water heated by the water can be used for heating the test tube 5 in the heating chamber 3 in a water bath manner, and when the threaded column 12 rotates, the cleaning brush 21 can be driven to rotate, the filter screen 9 can be cleaned through the rotating cleaning brush 21, so that the filter screen 9 is prevented from being blocked by impurities in the water after long-time cleaning work, then the permeability of the filter screen 9 is effectively improved, and when the worm 16 rotates, the second worm wheel 20 is driven to rotate, the rotating shaft 18 is driven to rotate, the stirring rod 19 is driven to rotate through the rotating shaft 18, the water liquid in the heating chamber 3 can be stirred through the rotating stirring rod 19, the average temperature of the water liquid in the heating chamber 3 is effectively improved, the problems that the bottom of the water liquid in the heating chamber 3 is hot and the top of the water liquid is cold are solved, the heating speed of the test tube 5 is effectively improved, after the cosmetic samples in the test tube 5 are completely dissolved, the paper film adsorbing the heavy metal ions is placed in the cosmetic samples after the cosmetic samples are completely dissolved, the heavy metal ions in the cosmetic samples are adsorbed through the paper film, after the paper film is placed in the cosmetic samples for 30 minutes, the paper film in the cosmetic samples can be taken out at the moment, and (4) placing the paper film obtained in the step S3 into corresponding drying equipment, drying the paper film through the drying equipment, taking the dried paper film out of the drying equipment, storing and transporting the dried paper film, conveying the dried paper film into a detection mechanism, and detecting the content of heavy metal in the paper film through the detection equipment in the detection mechanism.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. A pretreatment method for detecting heavy metals in cosmetics comprises the following steps:
s1: sampling cosmetics to be detected, placing the sampled cosmetics into corresponding heating equipment (1), and carrying out water bath heating treatment on the sampled cosmetics through the heating equipment (1);
s2: after the cosmetic sample in the heating device (1) is completely dissolved, placing the paper film for adsorbing the heavy metal ions into the completely dissolved cosmetic sample, and adsorbing the heavy metal ions in the cosmetic sample through the paper film;
s3: after the paper film is placed in the cosmetic sample for 30 minutes, the paper film in the cosmetic sample can be taken out;
s4: placing the paper film obtained in the step S3 into corresponding drying equipment, and drying the paper film through the drying equipment;
s5: and taking the dried paper film out of the drying equipment, storing and transporting the dried paper film, conveying the dried paper film into the detection mechanism, and detecting the content of heavy metals in the paper film through the detection equipment in the detection mechanism.
2. The pretreatment method for detecting heavy metals in cosmetics according to claim 1, wherein a treatment cavity (2) and a heating cavity (3) are formed inside the heating device (1), a plurality of mounting grooves (4) corresponding to the heating cavity (3) are formed in the top of the heating device (1), test tubes (5) are slidably inserted into the mounting grooves (4), a bearing plate (6) is slidably connected inside the heating cavity (3), a plurality of water permeable holes are formed in the bearing plate (6), a driving assembly for driving the bearing plate (6) to displace is arranged on the heating device (1), a plurality of bearing grooves (7) corresponding to the test tubes (5) are formed in the top of the bearing plate (6), the bottoms of the test tubes (5) are respectively slidably connected inside the corresponding bearing grooves (7), and a plurality of heating pipes (8) are fixed on the inner wall of the bottom of the heating cavity (3), water injection valve (10) are installed at the top of firing equipment (1), water injection valve (10) are linked together with heating chamber (3), the inside in heating chamber (3) is fixed with filter screen (9), filter screen (9) are located between water injection valve (10) and loading board (6).
3. The pretreatment method for detecting heavy metals in cosmetics according to claim 2, wherein a water outlet pipe (11) is installed at the bottom of one end of the heating device (1), and a butterfly valve is installed in the middle of the water outlet pipe (11).
4. The pretreatment method for detecting heavy metals in cosmetics according to claim 2, wherein the driving assembly comprises a threaded column (12) located below the bearing plate (6), one end of the threaded column (12) is rotatably connected to the inner wall of the treatment chamber (2) through a bearing, the other end of the threaded column (12) is rotatably connected to the inner wall of the heating chamber (3) through a bearing, the outer walls of the two ends of the threaded column (12) located inside the heating chamber (3) are both provided with threads, the directions of the threads are opposite, the outer walls of the two ends of the threaded column (12) located inside the heating chamber (3) are both in threaded sleeve connection with a driving sleeve (13), the outer sides of the driving sleeves (13) are both hinged with a connecting rod (14) through a hinge, the other ends of the connecting rods (14) are both hinged with the outer side of the bearing plate (6) through a hinge, and a stepping motor (15) is fixed on the inner wall of the top of the treatment chamber (2), the output transmission of step motor (15) is connected with worm (16), the other end of worm (16) passes through the bearing and rotates the connection on the inner wall of treatment chamber (2) bottom, and the fixed cover of screw thread post (12) outer wall that is located treatment chamber (2) inside has been cup jointed first worm wheel (17), worm (16) and first worm wheel (17) meshing work, and the screw thread post (12) both sides outer wall that is located heating chamber (3) inside all is fixed with rotates the cover and establishes cleaning brush (21) in heating chamber (3) inside, the brush hair of cleaning brush (21) contacts with filter screen (9), cleaning brush (21) are located one side that filter screen (9) are close to water injection valve (10).
5. The pretreatment method for heavy metal detection in cosmetics according to claim 4, characterized in that a rotating shaft (18) is arranged below the threaded column (12), one end of the rotating shaft (18) is rotatably connected to the inner wall of the treatment cavity (2) through a bearing, the other end of the rotating shaft (18) is rotatably connected to the filter screen (9) through a bearing, a plurality of stirring rods (19) rotatably sleeved inside the heating cavity (3) are fixed to the outer wall of the rotating shaft (18) inside the heating cavity (3), a second worm wheel (20) is fixedly sleeved on the outer wall of the rotating shaft (18) inside the treatment cavity (2), and the second worm wheel (20) and the worm (16) are meshed to work.
6. The pretreatment method for detecting heavy metals in cosmetics according to claim 2, wherein a movable door (22) is hinged to one side of the outside of the heating device (1) through a hinge, a sealing ring is arranged on the outer wall of the movable door (22) along the circumferential direction, and the movable door (22) corresponds to the treatment cavity (2) and the heating cavity (3).
7. The pretreatment method for detecting heavy metals in cosmetics according to claim 5, wherein a rotary hole corresponding to the threaded column (12) and the rotary shaft (18) is formed in the inner wall between the treatment cavity (2) and the heating cavity (3), the threaded column (12) and the rotary shaft (18) are respectively rotatably sleeved in the corresponding rotary hole, and a rubber ring is arranged on the inner wall of the rotary hole along the circumferential direction.
8. The pretreatment method for detecting heavy metals in cosmetics according to claim 4, wherein a transfer hole is formed in the middle of the filter screen (9), and the threaded column (12) is rotatably connected to the inside of the transfer hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110677875.5A CN113281126A (en) | 2021-06-18 | 2021-06-18 | Pretreatment method for detection of heavy metals in cosmetics |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110677875.5A CN113281126A (en) | 2021-06-18 | 2021-06-18 | Pretreatment method for detection of heavy metals in cosmetics |
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| CN202110677875.5A Pending CN113281126A (en) | 2021-06-18 | 2021-06-18 | Pretreatment method for detection of heavy metals in cosmetics |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206479511U (en) * | 2017-01-20 | 2017-09-08 | 广州科颜氏生物科技有限公司 | A kind of cosmetics acid-base property detection means |
| CN109580418A (en) * | 2019-01-20 | 2019-04-05 | 王忠良 | Harmful heavy metal detection method in a kind of cosmetics |
| CN210400886U (en) * | 2019-05-30 | 2020-04-24 | 湖南化工职业技术学院 | Sampling device for food and cosmetic detection |
| CN112082819A (en) * | 2020-08-29 | 2020-12-15 | 贵州水蓝环保科技有限公司 | Sewage detection device and method |
| CN212497004U (en) * | 2020-06-08 | 2021-02-09 | 埃福贝密封技术(苏州)有限公司 | Polishing device for balancing diaphragm |
-
2021
- 2021-06-18 CN CN202110677875.5A patent/CN113281126A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206479511U (en) * | 2017-01-20 | 2017-09-08 | 广州科颜氏生物科技有限公司 | A kind of cosmetics acid-base property detection means |
| CN109580418A (en) * | 2019-01-20 | 2019-04-05 | 王忠良 | Harmful heavy metal detection method in a kind of cosmetics |
| CN210400886U (en) * | 2019-05-30 | 2020-04-24 | 湖南化工职业技术学院 | Sampling device for food and cosmetic detection |
| CN212497004U (en) * | 2020-06-08 | 2021-02-09 | 埃福贝密封技术(苏州)有限公司 | Polishing device for balancing diaphragm |
| CN112082819A (en) * | 2020-08-29 | 2020-12-15 | 贵州水蓝环保科技有限公司 | Sewage detection device and method |
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Application publication date: 20210820 |
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