CN112973979A - Extraction purifying tube and extraction system - Google Patents
Extraction purifying tube and extraction system Download PDFInfo
- Publication number
- CN112973979A CN112973979A CN202110158052.1A CN202110158052A CN112973979A CN 112973979 A CN112973979 A CN 112973979A CN 202110158052 A CN202110158052 A CN 202110158052A CN 112973979 A CN112973979 A CN 112973979A
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- block
- purification
- extraction
- pipe
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B7/00—Elements of centrifuges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B5/00—Other centrifuges
- B04B5/04—Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers
- B04B5/0407—Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers for liquids contained in receptacles
- B04B5/0414—Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers for liquids contained in receptacles comprising test tubes
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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
Abstract
The invention relates to the technical field of detection, in particular to an extraction purification tube and an extraction system. An extraction purification pipe comprises a pipe body, a pipe cover, a purification block and a flow guide piece; the pipe body is provided with a first end and a second end, and the first end is an opening; the tube cover is detachably connected with the first end; the purifying block is accommodated in the pipe body, a first cavity is formed by the purifying block and the first end, and a second cavity is formed by the purifying block and the second end; the flow guide piece is accommodated in the first cavity and connected with the purification block, and is used for communicating or blocking the purification block with the first cavity; the purification block is used for moving towards the direction close to the first end under the action of external force so as to form negative pressure in the second cavity, and the diversion piece is used for communicating the purification block with the first cavity, so that liquid in the first cavity flows towards the second cavity through the purification block. The extraction purifying tube and the extraction system can simplify the pretreatment steps and reduce the detection error, thereby improving the treatment efficiency.
Description
Technical Field
The invention relates to the technical field of detection, in particular to an extraction purification tube and an extraction system.
Background
In the field of analysis and detection pretreatment, particularly in the analysis and detection process of the content of trace organic matters, after an object to be detected is extracted in a pretreatment step, non-to-be-detected co-extracted substances (impurities) are removed as much as possible by various means, components to be detected are reserved, the total purpose is to remove the impurities by the pretreatment means, the analysis interference of the impurities in the subsequent step to be detected on the object to be detected is reduced, the minimum detection value of the object to be detected is reduced, and the quantitative accuracy of the object to be detected is increased under the trace level.
The whole pretreatment process comprises a plurality of treatment steps, and the sample transfer among the steps increases the detection error and simultaneously leads the operation steps to be complicated, thereby reducing the treatment efficiency.
Disclosure of Invention
Objects of the present invention include, for example, providing an extraction purge tube and an extraction system that can simplify the pretreatment steps and reduce the detection errors, thereby improving the treatment efficiency.
Embodiments of the invention may be implemented as follows:
in a first aspect, the present invention provides an extraction purification tube, which includes a tube body, a tube cap, a purification block, and a flow guide member;
the pipe body is provided with a first end and a second end, and the first end is an opening; the tube cover is detachably connected with the first end; the purifying block is accommodated in the pipe body, a first cavity is formed by the purifying block and the first end, and a second cavity is formed by the purifying block and the second end;
the flow guide piece is accommodated in the first cavity and connected with the purification block, and is used for communicating or blocking the purification block with the first cavity; the purification block is used for moving towards the direction close to the first end under the action of external force so as to form negative pressure in the second cavity, and the diversion piece is used for communicating the purification block with the first cavity, so that liquid in the first cavity flows towards the second cavity through the purification block.
In an alternative embodiment, the flow guide comprises a pressure valve connected to the purge block for communicating the purge block with the first chamber when a negative pressure is created in the second chamber.
In an alternative embodiment, the second end is open, and the extraction purification tube further comprises a flow restricting plug disposed at the second end; the flow limiting plug and the purification block jointly form a second chamber;
the flow-limiting plug is provided with a flow-guiding hole for communicating the second cavity with the outside, and the flow-guiding hole is in a normally closed state.
In an alternative embodiment, the extraction purification tube further comprises a guide member connected to the purification block for driving the purification block to move relative to the tube body under the action of an external force.
In an alternative embodiment, the guide is located within the first chamber and the guide is connected to the purification block through the flow guide.
In an alternative embodiment, the extraction purge tube further comprises a flow restricting plug disposed at the second end, the flow restricting plug abutting the purge block.
In an alternative embodiment, the length of the guide is greater than or equal to the shortest distance from the end of the purge block in abutment with the flow restricting plug to the first end.
In an optional embodiment, the purification block is internally provided with an adsorption filler for adsorbing impurities or enriching the object to be detected.
In an alternative embodiment, the outer circumference of the first end is provided with an external thread, and the inner circumferential surface of the tube cover is provided with an internal thread that mates with the external thread.
In a second aspect, the present invention provides an extraction system, which comprises a centrifuge, a nitrogen blowing instrument and the above extraction purification tube;
the centrifuge is used for driving the extraction purification pipe to do centrifugal motion, and the first end of the extraction purification pipe positioned in the centrifuge is positioned below the second end; the nitrogen blowing instrument comprises a first nitrogen blowing pipe and a second nitrogen blowing pipe, and the first nitrogen blowing pipe and the second nitrogen blowing pipe are used for extending into the pipe body from the first end and the second end.
The embodiment of the invention has the beneficial effects that:
the extraction purification tube comprises a tube body, a tube cover, a purification block and a flow guide piece; the purifying block is accommodated in the pipe body, a first cavity is formed by the purifying block and the first end, and a second cavity is formed by the purifying block and the second end; the tube cover is detachably connected with the first end, so that when the tube cover is connected with the first end of the tube body, the opening of the first end can be sealed, and then a sample to be detected and an extraction solution can be added into the sealed first cavity, so that an object to be detected in the sample to be detected can be extracted; when the sample to be detected and the extraction solution are added into the closed first cavity, the guide piece is accommodated in the first cavity and blocks the purification block from the first cavity, so that the sample to be detected and the extraction solution in the first cavity cannot contact the purification block in the process of extracting the object to be detected;
after the object to be detected is extracted, the tube cover is positioned below the tube body by inverting the extraction purification tube, and impurities in the sample are attached to the tube cover under the action of a centrifugal machine; then adjusting the direction of the extraction purification tube, and taking down the tube cover after the tube cover is positioned above the tube body, so that impurities can be removed;
then, the purification block is driven to move towards the direction close to the first end, and the second chamber is formed by the purification block and the second end and is isolated from the outside at the moment, and the volume of the second chamber can be increased by the movement of the purification block, so that negative pressure can be formed in the second chamber by the movement of the purification block; after negative pressure is formed in the second chamber, the purifying block is communicated with the first chamber by the flow guide piece under the action of the negative pressure, so that liquid in the first chamber can flow to the second chamber through the purifying block, and therefore, the extracting solution in the first chamber can be purified by the purifying block;
because the tube cap has been disconnected with the body this moment, so nitrogen gas pipe that nitrogen blew the appearance can enter into the body through first end or second end to carry out the nitrogen to the extraction purge tube and blow.
In conclusion, the extraction and purification tube can perform the steps of extraction, centrifugation and nitrogen blowing without transferring a sample during the use process, thereby simplifying the pretreatment step, reducing the detection error and improving the treatment efficiency.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is an exploded view of an extraction purification tube according to an embodiment of the present invention;
FIG. 2 is a schematic view of the connection between the tube and the cap according to the embodiment of the present invention;
FIG. 3 is a schematic structural view of an inverted extraction purification tube according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of the extraction purge tube under negative pressure in the second chamber according to the embodiment of the present invention;
FIG. 5 is a schematic structural diagram of an extraction purification pipe for nitrogen purging according to an embodiment of the present invention;
FIG. 6 is a schematic view showing the connection of the extraction purification pipe with the first nitrogen blowing pipe and the second nitrogen blowing pipe in the embodiment of the present invention.
Icon: 200-an extraction purification tube; 210-a tube; 220-a tube cover; 230-a purification block; 240-a flow guide; 211-a first end; 212-a second end; 213-a first chamber; 214-a second chamber; 241-a pressure valve; 250-a flow restricting plug; 251-a diversion hole; 260-a guide; 101-a first nitrogen blowpipe; 102-second nitrogen blow pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
Referring to fig. 1 to 6, fig. 1 to 3 show the structure of the extraction purification pipe in the embodiment of the present invention, fig. 4 shows the structure of the extraction purification pipe in the embodiment of the present invention when the second chamber is at a negative pressure, and fig. 5 and 6 show the structure of the extraction purification pipe when nitrogen is blown;
the embodiment provides an extraction system, which comprises a centrifuge, a nitrogen blowing instrument and an extraction purification pipe 200;
wherein, the extraction purification pipe 200 comprises a pipe body 210, a pipe cover 220, a purification block 230 and a flow guide member 240; the tube 210 has a first end 211 and a second end 212, and the first end 211 is an opening; the cap 220 is removably coupled to the first end 211; the purification block 230 is accommodated in the tube 210, and the purification block 230 and the first end 211 form a first chamber 213, and the purification block 230 and the second end 212 form a second chamber 214; the flow guide member 240 is accommodated in the first cavity 213 and connected to the purification block 230, and the flow guide member 240 is used for communicating or blocking the purification block 230 with the first cavity 213; the purification block 230 is configured to move towards the direction close to the first end 211 under the action of an external force, so as to form a negative pressure in the second chamber 214, and the flow guide 240 communicates the purification block 230 with the first chamber 213, so that the liquid in the first chamber 213 flows towards the second chamber 214 through the purification block 230.
The centrifuge is used for driving the extraction purification pipe 200 to do centrifugal motion, and the first end 211 of the extraction purification pipe 200 positioned in the centrifuge is positioned below the second end 212; the nitrogen blowing instrument comprises a first nitrogen blowing pipe 101 and a second nitrogen blowing pipe 102, wherein the first nitrogen blowing pipe 101 and the second nitrogen blowing pipe 102 are used for extending into the tube body 210 from a first end 211 and a second end 212.
Referring to fig. 1-6, the operation principle of the extraction system is as follows:
the extraction purification pipe 200 includes a pipe body 210, a pipe cap 220, a purification block 230, and a guide 240; the purification block 230 is accommodated in the tube 210, and the purification block 230 and the first end 211 form a first chamber 213, and the purification block 230 and the second end 212 form a second chamber 214.
Referring to fig. 1 and 2, the cap 220 is detachably connected to the first end 211, so that when the cap 220 is connected to the first end 211 of the tube 210, the opening of the first end 211 can be sealed, and the sample to be tested and the extraction solution can be added into the sealed first chamber 213, so as to extract the substance to be tested from the sample to be tested; when the sample to be tested and the extraction solution are added into the closed first chamber 213, since the flow guide member 240 is accommodated in the first chamber 213 and the purification block 230 is blocked from the first chamber 213 by the flow guide member 240, the sample to be tested and the extraction solution in the first chamber 213 do not contact with the purification block 230 during the process of extracting the object to be tested;
referring to fig. 3, after the object to be tested is extracted, the tube cap 220 is positioned below the tube body 210 by inverting the extraction purification tube 200, and impurities in the sample are attached to the tube cap 220 under the action of the centrifuge; then, the direction of the extraction purification tube 200 is adjusted, and the tube cap 220 is removed after the tube cap 220 is positioned above the tube body 210, so that impurities can be removed;
referring to fig. 4 and 5, subsequently, by driving the purge block 230 to move toward the direction close to the first end 211, since the purge block 230 and the second end 212 form the second chamber 214, and the second chamber 214 is in a state of being isolated from the outside at this time, and the movement of the purge block 230 increases the volume of the second chamber 214, a negative pressure can be formed in the second chamber 214 by the movement of the purge block 230; after negative pressure is formed in the second chamber 214, the guide member 240 communicates the purifying block 230 with the first chamber 213 under the action of the negative pressure, so that the liquid in the first chamber 213 can flow to the second chamber 214 through the purifying block 230, and thus, the extracting solution in the first chamber 213 can be purified by the purifying block 230;
referring to fig. 5 and 6, since the cap 220 is disconnected from the tube 210, the nitrogen tube of the nitrogen blowing apparatus can enter the tube 210 through the first end 211 or the second end 212, and blow nitrogen to the extraction purification tube 200.
In summary, the extraction purification tube 200 can perform the extraction, centrifugation, and nitrogen blowing steps without transferring the sample during use, thereby simplifying the pretreatment steps, reducing the detection error, and improving the treatment efficiency.
It should be noted that, referring to fig. 1 to fig. 3, in the present embodiment, when the flow guiding element 240 and the purifying block 230 are disposed, the flow guiding element 240 is connected to the purifying block 230; when the pressure in the first chamber 213 is constant, the flow guide 240 is used to block the purifying block 230 from the first chamber 213, so as to prevent the sample and the extraction solution in the first chamber 213 from contacting the purifying block 230, and at this time, the extraction and purification tube 200 is used to extract the analyte and perform centrifugation; when the purification block 230 moves and the pressure in the first chamber 213 becomes negative, the flow guide member 240 serves to communicate the purification block 230 with the first chamber 213, so that the extraction liquid in the first chamber 213 can be brought into contact with the purification block 230 to purify the extraction liquid by the purification block 230, and at this time, the extraction purification pipe 200 is used to perform a nitrogen blowing operation.
Further, referring to fig. 5 to 6 in combination with fig. 1, it should be noted that, as can be seen from the above, when the extraction system performs the nitrogen blowing step, the first nitrogen blowing pipe 101 and the second nitrogen blowing pipe 102 of the nitrogen blowing apparatus extend into the pipe body 210 from the first end 211 and the second end 212, such a nitrogen blowing manner is the nitrogen blowing manner when the nitrogen blowing apparatus includes the first nitrogen blowing pipe 101 and the second nitrogen blowing pipe 102 in the present embodiment, and in other embodiments of the present invention, if the nitrogen blowing apparatus includes the first nitrogen blowing pipe 101 or the second nitrogen blowing pipe 102, the first nitrogen blowing pipe 101 or the second nitrogen blowing pipe 102 may extend into the pipe body 210 from the first end 211 or the second end 212 of the pipe body 210.
Further, referring to fig. 1-3, in the present embodiment, the second end 212 may be an opening, and the extraction purification pipe 200 further includes a flow limiting plug 250 disposed at the second end 212; the restrictor plug 250 and the purge block 230 together form the second chamber 214; the flow limiting plug 250 is provided with a flow guiding hole 251 for communicating the second chamber 214 with the outside, and the flow guiding hole 251 is in a normally closed state. When the extraction/purification pipe 200 is operated to perform nitrogen blowing, the first nitrogen blowing pipe 101 or the second nitrogen blowing pipe 102 is inserted into the pipe body 210 through the opening of the first end 211 and the guide hole 251 of the second end 212, so that the extraction liquid in the pipe body 210 can be subjected to nitrogen blowing; it should be noted that, since the diversion hole 251 is in a normally closed state, during the use of the extraction purification tube 200, no leakage occurs due to the diversion hole 251.
Referring to fig. 1-3, in the present embodiment, the flow guide member 240 may include a pressure valve 241 connected to the purge block 230, and the pressure valve 241 is used for communicating the purge block 230 with the first chamber 213 when a negative pressure is formed in the second chamber 214. Therefore, when the pressure in the first chamber 213 is constant, the pressure valve 241 is used to block the purge block 230 from the first chamber 213, so as to prevent the sample and the extraction solution in the first chamber 213 from contacting the purge block 230, and at this time, the extraction purge tube 200 is used to extract the analyte and perform centrifugation; and when the purification block 230 moves and the pressure in the first chamber 213 becomes a negative pressure, the pressure valve 241 functions to communicate the purification block 230 with the first chamber 213, so that the extraction liquid in the first chamber 213 can be brought into contact with the purification block 230 to purify the extraction liquid by the purification block 230, and at this time, the extraction purification pipe 200 is used for the operation of nitrogen blowing.
Further, referring to fig. 1-3, in the present embodiment, in order to facilitate driving the purge block 230 to move in the tube body 210, the extraction purge tube 200 further includes a guide 260 connected to the purge block 230, wherein the guide 260 is used for driving the purge block 230 to move relative to the tube body 210 under an external force.
To facilitate the user's manipulation of the guide member 260, since the opening of the first end 211 is in an open state after the tube cover 220 is detached, the guide member 260 may be positioned in the first chamber 213 and the guide member 260 is coupled to the purification block 230 through the guide member 240 when the guide member 260 is disposed. And the length of the guide 260 is greater than or equal to the shortest distance from the end of the purge block 230 abutting the restriction plug 250 to the first end 211.
In order to enable the purification block 230 to purify the extracting solution, the purification block 230 is provided with an adsorption filler to adsorb impurities or enrich the substance to be detected.
Referring to fig. 1 to 3, in order to facilitate the cap 220 to be separated from the tube 210 or connected to the tube 210 and to prevent the leakage at the connection between the cap 220 and the tube 210 during the connection between the cap 220 and the tube 210 and the centrifugal operation, an external thread is disposed on the outer circumference of the first end 211, an internal thread engaged with the external thread is disposed on the inner circumference of the cap 220, and a sealing ring may be disposed at the connection between the cap 220 and the tube 210.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. An extraction purification pipe is characterized in that:
the extraction purification pipe comprises a pipe body, a pipe cover, a purification block and a flow guide piece;
the pipe body is provided with a first end and a second end, and the first end is an opening; the tube cover is detachably connected with the first end; the purifying block is accommodated in the pipe body, a first cavity is formed by the purifying block and the first end, and a second cavity is formed by the purifying block and the second end;
the flow guide piece is accommodated in the first cavity and connected with the purification block, and the flow guide piece is used for communicating or blocking the purification block with the first cavity; the purifying block is used for moving towards the direction close to the first end under the action of external force so as to form negative pressure in the second cavity, the purifying block is communicated with the first cavity through the flow guide piece, and then liquid in the first cavity flows towards the second cavity through the purifying block.
2. The extraction purification tube of claim 1, wherein:
the flow guide piece comprises a pressure valve connected with the purification block, and the pressure valve is used for communicating the purification block with the first chamber when negative pressure is formed in the second chamber.
3. The extraction purification tube of claim 1, wherein:
the second end is provided with an opening, and the extraction purification pipe further comprises a flow limiting plug arranged at the second end; the flow limiting plug and the purification block jointly form the second chamber;
the flow-limiting plug is provided with a flow-guiding hole for communicating the second cavity with the outside, and the flow-guiding hole is in a normally closed state.
4. The extraction purification tube of claim 1, wherein:
the extraction purification pipe also comprises a guide piece connected with the purification block, and the guide piece is used for driving the purification block to move relative to the pipe body under the action of external force.
5. The extraction purification tube of claim 4, wherein:
the guide piece is positioned in the first chamber, and the guide piece penetrates through the flow guide piece to be connected with the purification block.
6. The extraction purification tube of claim 5, wherein:
the extraction purification pipe further comprises a flow limiting plug arranged at the second end, and the flow limiting plug is abutted to the purification block.
7. The extraction purification tube of claim 6, wherein:
the length of the guide piece is greater than or equal to the shortest distance from one end of the purifying block, which is abutted to the flow limiting plug, to the first end.
8. The extraction purification tube according to any one of claims 1 to 7, wherein:
the purifying block is internally provided with an adsorption filler for adsorbing impurities or enriching an object to be detected.
9. The extraction purification tube according to any one of claims 1 to 7, wherein:
the periphery of the first end is provided with external threads, and the inner peripheral surface of the pipe cover is provided with internal threads matched with the external threads.
10. An extraction system, characterized by:
the extraction system comprises a centrifuge, a nitrogen blower and an extraction purification tube as claimed in any one of claims 1 to 9;
the centrifuge is used for driving the extraction purification pipe to do centrifugal motion, and the first end of the extraction purification pipe positioned in the centrifuge is positioned below the second end; the nitrogen blowing instrument comprises a first nitrogen blowing pipe and a second nitrogen blowing pipe, and the first nitrogen blowing pipe and the second nitrogen blowing pipe are used for extending into the pipe body from the first end and the second end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110158052.1A CN112973979B (en) | 2021-02-04 | 2021-02-04 | Extraction purifying tube and extraction system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110158052.1A CN112973979B (en) | 2021-02-04 | 2021-02-04 | Extraction purifying tube and extraction system |
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| CN112973979A true CN112973979A (en) | 2021-06-18 |
| CN112973979B CN112973979B (en) | 2022-04-12 |
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| US4057499A (en) * | 1973-03-09 | 1977-11-08 | Buono Frank S | Apparatus and method for separation of blood |
| DE4128923A1 (en) * | 1990-10-05 | 1992-04-09 | Sarstedt Walter Geraete | Sepn. assembly for fluids, esp. tiny fractions of blood - including a sepg. filter piston which slides into lower tube to form a fluid seal |
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| CN205280467U (en) * | 2015-12-31 | 2016-06-01 | 力合科技（湖南）股份有限公司 | Adsorb little extraction device of component and solid phase |
| CN109297765A (en) * | 2018-12-07 | 2019-02-01 | 徐州华显凯星信息科技有限公司 | A kind of sewage treatment activated sludge detection sampler |
| CN210448175U (en) * | 2019-03-01 | 2020-05-05 | 中国水产科学研究院 | Push rod type filtering purification column |
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2021
- 2021-02-04 CN CN202110158052.1A patent/CN112973979B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4057499A (en) * | 1973-03-09 | 1977-11-08 | Buono Frank S | Apparatus and method for separation of blood |
| DE4128923A1 (en) * | 1990-10-05 | 1992-04-09 | Sarstedt Walter Geraete | Sepn. assembly for fluids, esp. tiny fractions of blood - including a sepg. filter piston which slides into lower tube to form a fluid seal |
| CN101516511A (en) * | 2006-07-21 | 2009-08-26 | 贝克顿·迪金森公司 | Membrane-based double-layer tube for sample collections |
| CN202869877U (en) * | 2012-11-02 | 2013-04-10 | 陕西出入境检验检疫局检验检疫技术中心 | Sample purifying and filtering device |
| CN205280467U (en) * | 2015-12-31 | 2016-06-01 | 力合科技（湖南）股份有限公司 | Adsorb little extraction device of component and solid phase |
| CN109297765A (en) * | 2018-12-07 | 2019-02-01 | 徐州华显凯星信息科技有限公司 | A kind of sewage treatment activated sludge detection sampler |
| CN210448175U (en) * | 2019-03-01 | 2020-05-05 | 中国水产科学研究院 | Push rod type filtering purification column |
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| Publication number | Publication date |
|---|---|
| CN112973979B (en) | 2022-04-12 |
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