CN109307543A - A kind of anti-liquid-detecting that drains off for solid-phase extracting instrument - Google Patents
A kind of anti-liquid-detecting that drains off for solid-phase extracting instrument Download PDFInfo
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- CN109307543A CN109307543A CN201811186634.5A CN201811186634A CN109307543A CN 109307543 A CN109307543 A CN 109307543A CN 201811186634 A CN201811186634 A CN 201811186634A CN 109307543 A CN109307543 A CN 109307543A
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- 239000007790 solid phase Substances 0.000 title claims abstract description 53
- 239000007788 liquid Substances 0.000 claims abstract description 58
- 230000000007 visual effect Effects 0.000 claims description 7
- 238000005086 pumping Methods 0.000 claims description 4
- 238000013459 approach Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000000605 extraction Methods 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- 238000002414 normal-phase solid-phase extraction Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000002618 waking effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D15/00—Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor
- B01D15/08—Selective adsorption, e.g. chromatography
- B01D15/26—Selective adsorption, e.g. chromatography characterised by the separation mechanism
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The invention discloses a kind of anti-liquid-detectings that drains off for solid-phase extracting instrument, SPE column is installed on the solid-phase extracting instrument, solid-phase extracting instrument is connect by gas-guide tube with press pump is taken out, including mounting rack, controller, liquid level sensor, the connection of the upper end-face edge of the mounting rack and solid-phase extracting instrument, mounting rack is equipped with multiple height fixed links, height fixed link is slidably connected with mounting rack, height fixed link is set to the side of SPE column and parallel with SPE column, the height fixed link is equipped with fixed sliding block, the fixed sliding block is equipped with liquid level sensor, the controller respectively with liquid level sensor, take out press pump electrical connection, detect the liquid height in SPE column automatically by liquid level sensor, guarantee not continuing to extract after liquid level reaches certain altitude, prevent the dried liquid stream in SPE column, which solves The problem of needing staff to monitor liquid level always at present, ensure that extracting and purifying quality, improves the accuracy of experimental data.
Description
Technical field
The present invention relates to experimental instrument technology, specially a kind of anti-liquid detecting dress that drains off for solid-phase extracting instrument
It sets.
Background technique
Solid Phase Extraction is exactly to be adsorbed the target compound in fluid sample using solid absorbent, with the matrix of sample and
Interfering compound separation, then uses elution or heating desorption again, achievees the purpose that separation and enrichment target compound.
When using solid-phase extracting instrument, fluid sample is added in SPE column, SPE column is then inserted in solid-phase extracting instrument
On the connector of upper end, accelerate the extraction of liquid in SPE column by pressurizeing or taking out negative pressure, during the experiment due to staff
It is busier or it is interim it is busy go out to will lead to the dried liquid stream in SPE column, cause clean-up effect to reduce, influence experiment knot
Fruit, it is therefore desirable to which the liquid height that staff is stared at constantly in SPE column prevents the phenomenon that drains off, and causes staff can not
Other work are carried out, working efficiency is reduced.
Summary of the invention
The present invention provides a kind of anti-liquid that drains off for solid-phase extracting instrument aiming at deficiencies of the prior art
Body detection device, the installation detecting device on solid-phase extracting instrument, the liquid detected automatically in SPE column by liquid level sensor are high
Degree, when liquid level reaches setting height, controller, which can automatically control to take out press pump and power off, to be stopped taking out pressure, guarantees that liquid level arrival is certain high
It does not continue to extract after degree, it is therefore prevented that the dried liquid stream in SPE column, which solves need staff to monitor always at present
The problem of liquid level, the constraint to staff is broken, staff can carry out other work in extraction process, mention
High working efficiency, while dried liquid stream problem is avoided, it ensure that extracting and purifying quality, improve the accurate of experimental data
Property.
To achieve the above object, invention provides the following technical solutions:
A kind of anti-liquid-detecting that drains off for solid-phase extracting instrument is equipped with SPE column on the solid-phase extracting instrument, Gu
Phase abstraction instrument is connect by gas-guide tube with press pump is taken out, including mounting rack, controller, liquid level sensor, the mounting rack and solid phase
The upper end-face edge of abstraction instrument connects, and mounting rack is equipped with multiple height fixed links, and height fixed link is slidably connected with mounting rack, high
It spends fixed link and is set to the side of SPE column and parallel with SPE column, the height fixed link is equipped with fixed sliding block, described fixed sliding
Block is equipped with liquid level sensor, and the controller is electrically connected with liquid level sensor, pumping press pump respectively.
Preferably, the mounting rack includes adjustable shelf, fixed frame, the fixed frame include fixing clip, the second connecting rod,
Crossbeam, the crossbeam are arranged along the length direction of solid-phase extracting instrument, and crossbeam is set to the side of solid-phase extracting instrument, second connection
Bar is arranged along the width direction of solid-phase extracting instrument, and one end of second connecting rod is connect with fixing clip, the second connecting rod
The other end is vertical with one end of crossbeam to be connected, and the adjustable shelf includes movable clip block, first connecting rod, lantern ring, first connecting rod
Parallel with the second connecting rod, one end of the first connecting rod is connect with movable clip block, the other end and lantern ring of first connecting rod
Connection, the lantern ring are socketed on crossbeam, and lantern ring is equipped with clamping screw, and lantern ring and crossbeam are fixed by clamping screw.
Preferably, it is equipped with card slot on the inside of the movable clip block and fixing clip, the card slot and solid-phase extracting instrument
Edge mate.
Preferably, the end of the crossbeam is equipped with horizontal stop block.
Preferably, the upper end side of the first connecting rod is vertically equipped with first support bar, the upper end of first support bar with
Lantern ring connection, the upper end side of second connecting rod are vertically equipped with second support bar, the upper end of the second support bar and cross
Beam connection, first support bar are identical as the height of second support bar.
Preferably, the upper end of the height fixed link is equipped with height limit block, and the side wall of the height fixed link is equipped with
The lower end of graduation mark, height fixed link is equipped with sliding sleeve, the sliding sleeve and beam engagement.
Preferably, the fixed sliding block includes connecting plate, clamping plate, buckle, and the both ends of the connecting plate are connected with clamping plate, and two
Block clamping plate is parallel to each other, and height fixed link is set between two clamping plates, and the inside of clamping plate is equipped with limit plate, the inner sidewall of limit plate
It is connect with height fixed link, the end of two clamping plates is connected by threaded rod, and threaded rod is equipped with nut, one of clamping plate
Side with snap connection, the buckle is connect with liquid level sensor.
Preferably, the liquid level sensor is capacitive approach switch.
Preferably, the controller is the single-chip microcontroller of model stm32f103, and controller is equipped with combined aural and visual alarm.
Compared with prior art, advantageous effect of the invention is:
1, present invention installation detecting device on solid-phase extracting instrument, the liquid in SPE column is detected by liquid level sensor automatically
Body height, when liquid level reaches setting height, controller, which can automatically control, takes out press pump power-off stopping pumping pressure, guarantees that liquid level reaches one
It does not continue to extract after determining height, it is therefore prevented that the dried liquid stream in SPE column, which solves need staff always at present
The problem of monitoring liquid level, has broken the constraint to staff, staff can carry out other works in extraction process
Make, improves work efficiency, while avoiding dried liquid stream problem, ensure that extracting and purifying quality, improve experimental data
Accuracy.
2, mounting rack of the invention in use, is adjusted between movable clip block and fixing clip by sliding adjustable shelf
Distance, be installed on various sizes of solid-phase extracting instrument so as to will test device, increase the versatility that device uses,
Installation process is convenient, simple, quick, is fixed by clamping screw, guarantees secured, reliable in use process.
3, the present invention is respectively provided with card slot on the inside of fixing clip and movable clip block, directly the edge card of solid-phase extracting instrument
Enter connection, prevents from slipping, use is relatively reliable.
4, horizontal stop block is arranged on crossbeam and can prevent from sliding in use process adjustable shelf and height fixed link by the present invention
Crossbeam out, while can prevent when not in use, adjustable shelf and height fixed link are lost, and guarantee the integrality of equipment.
5, the present invention increases beam height by setting first support bar and second support bar, and it is fixed can to shorten height
The height of bar, while guaranteeing the bottom that SPE column is able to detect that when liquid level sensor slides into bottom.
6, the present invention can prevent fixed sliding block from slipping in the upper end of height fixed link setting height limit block, guarantee to use
In equipment safety, height fixed link lower end be arranged sliding sleeve, convenient for adjust height fixed link horizontal position, regulative mode
Simply, conveniently.
7, limit plate is arranged in the present invention on the inside of clamping plate, on the one hand can play the role of being fixedly clamped to height fixed link,
It can guarantee that fixed sliding block can only do upper and lower sliding along height fixed link simultaneously, while be pressed from both sides using nut and threaded rod to two
When plate is locked, the curvature of clamping plate can be limited, prevent nut from tightening more degree damage clamping plates.
8, combined aural and visual alarm is arranged in the present invention on the controller, when liquid level reaches liquid level sensor detection position, control
Device can control combined aural and visual alarm and issue alarm signal, remind staff, more convenient to use.
Detailed description of the invention
Fig. 1 is the structural schematic diagram one that the present invention is mounted on solid-phase extracting instrument；
Fig. 2 is the structural schematic diagram two that the present invention is mounted on solid-phase extracting instrument；
Fig. 3 is structural schematic diagram of the invention；
Fig. 4 is the structural schematic diagram of fixed sliding block；
Fig. 5 is adjustable shelf structural schematic diagram；
Fig. 6 is height fixed rod structure schematic diagram.
In figure: 1- solid-phase extracting instrument；2-SPE column；3- liquid level sensor；4- mounting rack；5- controller；6- height is fixed
Bar；601- height limit block；602- graduation mark；603- sliding sleeve；7- fixes sliding block；701- connecting plate；702- clamping plate；703- spiral shell
It is female；704- threaded rod；705- limit plate；706- buckle；8- adjustable shelf；801- movable clip block；802- first connecting rod；803- set
Ring；804- clamping screw；805- first support bar；9- fixed frame；901- second support bar；The second connecting rod of 902-；903- is solid
Clamp block；904- crossbeam；905- horizontal stop block.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in Figure 1, 2, a kind of anti-liquid-detecting that drains off for solid-phase extracting instrument, on the solid-phase extracting instrument 1
SPE column 2 is installed, solid-phase extracting instrument 1 is connect by gas-guide tube with press pump is taken out, including mounting rack 4, controller 5, liquid level sensor
3, the mounting rack 4 is connect with the upper end-face edge of solid-phase extracting instrument 1, and mounting rack 4 is equipped with multiple height fixed links 6, and height is solid
Fixed pole 6 is slidably connected with mounting rack 4, and height fixed link 6 is set to the side of SPE column 2 and parallel with SPE column 2, and the height is fixed
Bar 6 is equipped with fixed sliding block 7, and the fixed sliding block 7 is equipped with liquid level sensor 3, the controller 5 respectively with liquid level sensor
3, press pump electrical connection is taken out, the liquid level sensor 5 is capacitive approach switch, and the controller 5 is model stm32f103
Single-chip microcontroller, controller 5 are equipped with combined aural and visual alarm.When liquid level reaches liquid level sensor 3 and detects position, controller 5 can be controlled
Combined aural and visual alarm issues alarm signal, reminds staff, more convenient to use.
As shown in figure 3, the mounting rack 4 include adjustable shelf 8, fixed frame 9, the fixed frame 9 include fixing clip 903,
Second connecting rod 902, crossbeam 904, the crossbeam 904 are arranged along the length direction of solid-phase extracting instrument 1, and crossbeam 904 is set to solid phase
The side of abstraction instrument 1, second connecting rod 902 are arranged along the width direction of solid-phase extracting instrument 1, second connecting rod 902
One end connect with fixing clip 903, the other end of the second connecting rod 902 is vertical with one end of crossbeam 904 to be connect, crossbeam 904
The other end be equipped with horizontal stop block 905, can prevent from skidding off crossbeam 904 in use process adjustable shelf 8 and height fixed link 6,
It can prevent when not in use simultaneously, adjustable shelf 8 and height fixed link 6 are lost, and guarantee the integrality of equipment.As shown in figure 5, institute
Stating adjustable shelf 8 includes movable clip block 801, first connecting rod 802, lantern ring 803, and first connecting rod 802 and the second connecting rod 902 are flat
Row, one end of the first connecting rod 802 are connect with movable clip block 801, and the other end and lantern ring 803 of first connecting rod 802 connect
It connects, the lantern ring 803 is socketed on crossbeam 904, and lantern ring 803 is equipped with clamping screw 804, and lantern ring 803 and crossbeam 904 pass through lock
Tight bolt 804 is fixed, and the movable clip block 801 and the inside of fixing clip 903 are equipped with card slot, the card slot and Solid Phase Extraction
The edge of solid-phase extracting instrument 1 is directly caught in connection by the edge mate of instrument 1, prevents from slipping, use is relatively reliable.Mounting rack 4 exists
In use process, the distance between movable clip block 801 and fixing clip 903 are adjusted by sliding adjustable shelf 8, so as to examine
Survey device to be installed on various sizes of solid-phase extracting instrument, increase the versatility that device uses, installation process is convenient, it is simple,
Quickly, it is fixed, is guaranteed secured, reliable in use process by clamping screw 804.
The upper end side of the first connecting rod 802 is vertically equipped with first support bar 805, the upper end of first support bar 805
It is connect with lantern ring 803, the upper end side of second connecting rod 902 is vertically equipped with second support bar 901, the second support bar
901 upper end is connect with crossbeam 904, and first support bar 805 is identical as the height of second support bar 901.
As shown in fig. 6, the upper end of the height fixed link 6 is equipped with height limit block 601, the side of the height fixed link 6
Wall is equipped with graduation mark 602, and the lower end of height fixed link 6 is equipped with sliding sleeve 603, and the sliding sleeve 603 cooperates with crossbeam 904.
As shown in figure 4, the fixed sliding block 7 includes connecting plate 701, clamping plate 702, buckles 706, the connecting plate 701
Both ends are connected with clamping plate 702, and two clamping plates 702 are parallel to each other, and height fixed link 6 is set between two clamping plates 702, clamping plate 702
Inside be equipped with limit plate 705, the inner sidewall of limit plate 705 connect with height fixed link 6, on the one hand can be to height fixed link
6 play the role of being fixedly clamped, while can guarantee that fixed sliding block 7 can only do upper and lower sliding, two clamping plates along height fixed link 6
702 end is connected by threaded rod 704, and threaded rod 704 is equipped with nut 703, is using nut 703 and threaded rod 704
When being locked to two clamping plates 702, the curvature of clamping plate 702 can be limited, prevent nut 703 from tightening more degree damage folders
Plate 702.The side of one of clamping plate 702 is connect with buckle 706, and the buckle 706 is connect with liquid level sensor 3.
It is fixing clip 903 upper with solid-phase extracting instrument 1 in use, first connect mounting rack 4 with solid-phase extracting instrument 1
End margin connection, crossbeam 904 are arranged along the length direction of solid-phase extracting instrument 1, slide adjustable shelf 8, make movable clip block 801 and solid phase
The upper end-face edge of abstraction instrument 1 is clamped, and then tightens clamping screw 804 and the position of adjustable shelf 8 is fixed, then sliding height
Fixed link 6 makes liquid level sensor 3 be directed at SPE column 2, and a liquid level sensor 3 is directed at one, then by sliding fixed sliding block 7
The height of liquid level sensor 3 is adjusted, it is by tightening nut 703 that clamping plate 702 is fixed after setting height, it starts switch
Start to extract, after the liquid in SPE column 2 is that height drops to the setting height of liquid level sensor 3,3 meeting of liquid level sensor at this time
Signal is transmitted to controller 5, controller 5, which is closed, takes out press pump switch stopping pumping pressure, while alerting signal occurs for combined aural and visual alarm, mentions
Staff's extraction of waking up finishes, and guarantees not continuing to extract after liquid level reaches certain altitude, it is therefore prevented that the liquid flow in SPE column 2
It is dry, which solves needing staff to monitor liquid level always at present, break the constraint to staff,
Staff can carry out other work in extraction process, improve work efficiency, while avoid dried liquid stream problem, protect
Extracting and purifying quality has been demonstrate,proved, the accuracy of experimental data is improved.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (9)
1. a kind of anti-liquid-detecting that drains off for solid-phase extracting instrument, SPE column, solid phase are installed on the solid-phase extracting instrument
Abstraction instrument is connect by gas-guide tube with press pump is taken out, it is characterised in that: including mounting rack, controller, liquid level sensor, the installation
The connection of the upper end-face edge of frame and solid-phase extracting instrument, mounting rack are equipped with multiple height fixed links, and height fixed link and mounting rack are sliding
Dynamic connection, height fixed link are set to the side of SPE column and parallel with SPE column, and the height fixed link is equipped with fixed sliding block, institute
Fixed sliding block is stated equipped with liquid level sensor, the controller is electrically connected with liquid level sensor, pumping press pump respectively.
2. a kind of anti-liquid-detecting that drains off for solid-phase extracting instrument as described in claim 1, it is characterised in that: described
Mounting rack includes adjustable shelf, fixed frame, and the fixed frame includes fixing clip, the second connecting rod, crossbeam, and the crossbeam is along solid phase
The length direction of abstraction instrument is arranged, and crossbeam is set to the side of solid-phase extracting instrument, width of second connecting rod along solid-phase extracting instrument
Direction setting is spent, one end of second connecting rod is connect with fixing clip, the other end of the second connecting rod and one end of crossbeam
Vertical connection, the adjustable shelf includes movable clip block, first connecting rod, lantern ring, and first connecting rod is parallel with the second connecting rod, institute
The one end for stating first connecting rod is connect with movable clip block, and the other end of first connecting rod is connect with lantern ring, and the lantern ring is socketed in
On crossbeam, lantern ring is equipped with clamping screw, and lantern ring and crossbeam are fixed by clamping screw.
3. a kind of anti-liquid-detecting that drains off for solid-phase extracting instrument as claimed in claim 2, it is characterised in that: described
Card slot, the edge mate of the card slot and solid-phase extracting instrument are equipped on the inside of movable clip block and fixing clip.
4. a kind of anti-liquid-detecting that drains off for solid-phase extracting instrument as claimed in claim 2, it is characterised in that: described
The end of crossbeam is equipped with horizontal stop block.
5. a kind of anti-liquid-detecting that drains off for solid-phase extracting instrument as claimed in claim 2, it is characterised in that: described
The upper end side of first connecting rod is vertically equipped with first support bar, and the upper end of first support bar is connect with lantern ring, and described second connects
The upper end side of extension bar is vertically equipped with second support bar, and the upper end of the second support bar is connect with crossbeam, first support bar with
The height of second support bar is identical.
6. a kind of anti-liquid-detecting that drains off for solid-phase extracting instrument as claimed in claim 2, it is characterised in that: described
The upper end of height fixed link is equipped with height limit block, and the side wall of the height fixed link is equipped with graduation mark, height fixed link
Lower end is equipped with sliding sleeve, the sliding sleeve and beam engagement.
7. a kind of anti-liquid-detecting that drains off for solid-phase extracting instrument as claimed in claim 6, it is characterised in that: described
Fixed sliding block includes connecting plate, clamping plate, buckle, and the both ends of the connecting plate are connected with clamping plate, and two clamping plates are parallel to each other, height
Fixed link is set between two clamping plates, and the inside of clamping plate is equipped with limit plate, and the inner sidewall of limit plate is connect with height fixed link, and two
The end of block clamping plate by threaded rod connect, and threaded rod be equipped with nut, the side of one of clamping plate with snap connection, institute
Buckle is stated to connect with liquid level sensor.
8. a kind of anti-liquid-detecting that drains off for solid-phase extracting instrument as claimed in claim 7, it is characterised in that: described
Liquid level sensor is capacitive approach switch.
9. a kind of anti-liquid-detecting that drains off for solid-phase extracting instrument as described in claim 1, it is characterised in that: described
Controller is the single-chip microcontroller of model stm32f103, and controller is equipped with combined aural and visual alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811186634.5A CN109307543A (en) | 2018-10-12 | 2018-10-12 | A kind of anti-liquid-detecting that drains off for solid-phase extracting instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811186634.5A CN109307543A (en) | 2018-10-12 | 2018-10-12 | A kind of anti-liquid-detecting that drains off for solid-phase extracting instrument |
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| CN201811186634.5A Pending CN109307543A (en) | 2018-10-12 | 2018-10-12 | A kind of anti-liquid-detecting that drains off for solid-phase extracting instrument |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112245970A (en) * | 2020-09-16 | 2021-01-22 | 金华市农产品质量安全中心(金华市农业综合检验检测中心) | Anti-shaking solid-phase extraction rack |
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| CN205483763U (en) * | 2016-03-09 | 2016-08-17 | 杭州老桐君制药有限公司 | Detect dedicated solid -phase extraction post of honey |
| CN205861166U (en) * | 2016-07-29 | 2017-01-04 | 徐紫光 | Level monitoring device in rare earth extraction separation head tank |
| CN207516133U (en) * | 2017-10-13 | 2018-06-19 | 苏州市苏测检测技术有限公司 | Novel solid-phase extracting instrument |
| CN208921226U (en) * | 2018-10-12 | 2019-05-31 | 山东省农业科学院农业质量标准与检测技术研究所 | A kind of anti-liquid-detecting that drains off for solid-phase extracting instrument |
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| CN112245970A (en) * | 2020-09-16 | 2021-01-22 | 金华市农产品质量安全中心(金华市农业综合检验检测中心) | Anti-shaking solid-phase extraction rack |
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