CN105158052B - A kind of efficient process equipment of fluid sample - Google Patents
A kind of efficient process equipment of fluid sample Download PDFInfo
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- CN105158052B CN105158052B CN201510508001.1A CN201510508001A CN105158052B CN 105158052 B CN105158052 B CN 105158052B CN 201510508001 A CN201510508001 A CN 201510508001A CN 105158052 B CN105158052 B CN 105158052B
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Abstract
The invention discloses a kind of efficient process equipment of fluid sample, it is desirable to provide one kind is easy to operate, thickening efficiency is high, and simultaneously multiple extract solution samples can be carried out with the efficient process equipment of the fluid sample of concentration.It includes nitrogen concentration mechanism, the nitrogen concentration mechanism includes vertical guide rod, the guide pin bushing being slidably arranged on vertical guide rod, the support flat board and the heating water tank of upper end open being arranged on guide pin bushing, the upper surface of the heating water tank is provided with spacing flat board, and spacing flat board is provided with some vertical limiting through hole, the support flat board is provided with some and each vertical limiting through hole vertical nitrogen sparge tube correspondingly.
Description
Technical field
The present invention relates to a kind of aquatic products pre-processing device, and in particular to a kind of height of the fluid sample of aquatic product extract
Imitate processing equipment.
Background technology
As the improvement of people's living standards, while aquatic products production and consumption yield greatly improves, aquatic products
Quality problems also increasingly attract attention;The quality good or not of aquatic products how is examined, is the problem of consumer pays special attention to.According to
The alimentary codex of correlation, Food Inspection regulation require that aquatic products are needed by the side such as organoleptic examination, physical examination, chemical analysis
The detection in face is to ensure the quality safety of aquatic products.
At present, the one of which processing procedure of the extract solution of aquatic products detection comprises the following steps:First, pass through nitrogen
Concentrating instrument concentrated extracting solution, i.e., be blown into air into extract solution or nitrogen concentrates to extract solution;Second, to by concentration
Organic solvent is added in extraction liquid container and is shaken up, is then filtered by filter membrane, so as to obtain aquatic products detection
Fluid sample.Extract solution concentration in above-mentioned aquatic product extract processing procedure, which uses, is blown into the side that air or nitrogen are concentrated
Formula, its thickening efficiency are low.On the other hand, when being filtered by filter membrane to extract solution, often single treatment process can only
Filter operation is carried out to an extract solution sample, this causes the large batch of sample treatment in actually detected often to spend largely
Time, operating process is comparatively laborious, wastes time and energy.
The content of the invention
The first object of the present invention is to overcome deficiency of the prior art, there is provided a kind of easy to operate, thickening efficiency
Height, and simultaneously multiple extract solution samples can be carried out with the efficient process equipment of the fluid sample of concentration.
It is another object of the present invention in order to provide it is a kind of it is easy to operate, operating efficiency is high, and can be simultaneously to multiple
Extract solution sample carries out the efficient process equipment of the fluid sample of filtration treatment.
The technical scheme is that:
A kind of efficient process equipment of fluid sample, including nitrogen concentration mechanism, it is vertical that the nitrogen concentration mechanism includes
Guide rod, the guide pin bushing being slidably arranged on vertical guide rod, the support flat board and the heating water tank of upper end open being arranged on guide pin bushing,
The upper surface of the heating water tank is provided with spacing flat board, and spacing flat board is provided with some vertical limiting through hole, the support
Flat board is provided with some and each vertical limiting through hole vertical nitrogen sparge tube correspondingly.
This programme coordinates vertical nitrogen sparge tube to enter simultaneously to the extract solution sample of aquatic products by the hot water in heating water tank
Row concentration, thus thickening efficiency can be effectively improved.On the other hand, additionally it is possible to while multiple extract solution samples are concentrated
Processing.
Preferably, also including sample liquid filter, the sample liquid filter includes the case with sealed internal chamber
Body, liquid sample collection device and the vaccum-pumping equipment being arranged in casing, the vaccum-pumping equipment by vacuum lead with
The inner chamber connection of casing, the box top are provided with some grafting through holes, upper and lower ends opening are inserted with each grafting through hole
Cartridge filter, is provided with sealing-plug in the upper port of cartridge filter, the bottom of cartridge filter is provided with filter membrane interlayer, described to connect hole inner side
The first sealing ring is provided between face and cartridge filter;The liquid sample collection device include being arranged on installation flat board in casing and
Be arranged on installation flat board on and with the one-to-one liquid sample collection cylinder of each cartridge filter, and liquid sample collection cylinder positioned at filtering
Cylinder lower section.This programme can carry out filtration treatment to multiple extract solution samples simultaneously, and its is easy to operate, operating efficiency is high.
Preferably, also include the adaptive tight mechanism of communication type, the casing include upper end open box-like body and
For seal hide box-like body and upper end open case lid, the case lid edge is provided with the annular side listrium that down extends of circle,
And annular side listrium is set on box-like body;
The adaptive tight mechanism of communication type includes the mounting groove being arranged on annular side listrium medial surface, is arranged on peace
Inflation seal ring and pressure conversion cylinder body in tankage;
The inner chamber of the pressure conversion cylinder body is made up of interconnected the first cavity and the second cavity, and the first cavity
Internal diameter is more than the internal diameter of the second cavity;First piston body is provided with first cavity, second piston body is provided with the second cavity,
And be connected between first piston body and second piston body by head rod, lived on the pressure conversion cylinder body close to first
The one end open of cock body, close to the closing of one end of second piston body;
The first inside cavities face is provided with the first limited block, and the first limited block is lived with second piston body positioned at first
Cock body opposite sides, second cavity are provided with the first pretension compression bullet that first piston body can be made to be resisted against on the first limited block
Spring, and the first pretension compression spring is located at second piston body opposite sides with first piston body;
The pressure conversion cylinder body lateral surface is provided with the first connector and the second connector, the first connector and the first chamber
Body phase connects, and the first connector is between first piston body and second piston body;Second connector is connected with the second cavity
It is logical, and the second connector is located at second piston body opposite sides with first piston body;The box-like body lateral surface is provided with the
Three connectors, the inflation seal ring, which is provided with, fills exhaust nozzle, by the between first connector and the 3rd connector
A connecting pipe road is connected, and second connector is connected with filling between exhaust nozzle by the second connecting pipe.
The liquid sample collection cylinder in casing is taken out for convenience, usual casing is designed with a case lid;But such one
Come between case lid and box-like body just to need to set sealing structure, prevent that ambient atmos are by case lid and casing sheet in vacuum
Enter cabinets cavity between body.The sealing structure between case lid and box-like body is exactly generally a sealing ring at present, and due to
The fit precision problem of case lid and box-like body(Especially square casing), common sealing ring often is difficult to form what is relied
Sealing.On the other hand, because case lid is needed through normally open/closing, this make it that the sealing ring between case lid and box-like body is easy
Loosen, produce gap, cause ambient atmos in cabinets cavity vacuum to enter cabinets cavity, influence the mistake of sample extracting solution
Filter.Further, since case lid needs, through normally open/closing, to cause case lid can not be smoothly according to common gas-flow closure circle
Unlatching/closing.This programme is improved for this problem, and it can be before sample liquid filter normal use not be influenceed
Put, effectively solve because of the poor sealing between case lid and box-like body, and cause to take out the negative pressure deficiency of the cavity in casing, shadow
The problem of ringing sample separation, extraction process.
Because the pressure conversion inner chamber of cylinder block between first piston body and second piston body passes through the first connecting pipe and case
The intracavity inter-connection of body, and the cross-sectional area of first piston body is more than the cross-sectional area of second piston body;Thus vacuumizing
During air pressure between first piston body and second piston body reduce, make second piston body toward the second spacing Block direction movement,
So as to which the gas in pressure conversion cylinder body to be pressed into the interior intracavitary of inflation seal ring by the second connecting pipe, make inflatable close
Seal expands, and then ensures that inflation seal ring forms reliable sealing between case lid and box-like body;And with casing
The negative pressure of inner chamber increases, and the air pressure of intracavitary also increases therewith in the annular inflatable of inflation seal ring, is filled so as to be further ensured that
Gas formula sealing ring forms reliable sealing between case lid and box-like body, effectively solves because close between case lid and box-like body
Negative pressure deficiency that is bad, and causing to vacuumize cavity is sealed, the problem of influenceing sample separation, extraction process.On the other hand, sample is worked as
Separation, after the completion of extraction process, vaccum-pumping equipment is closed, and now cabinets cavity pressure is recovered, so that first piston body and the
Two piston bodies reset in the presence of the first pretension compression spring, and now inflation seal ring shrinks, so that case lid can be suitable
Unlatching/closing of profit, ensure equipment normal work.
Preferably, pressure conversion cylinder body lateral surface is provided with the 4th connector being connected with the first cavity, and the 4th
Connector is provided with electromagnetic switch valve between first piston body and second piston body at the 4th connector;Pressure conversion
Cylinder body lateral surface is provided with the 5th connector being connected with the second cavity, and the 5th connector is located at second with first piston body
Piston body opposite sides, electromagnetic switch valve is provided with the 5th connector;The box-like body lateral surface is provided with the 6th and connected
Interface, electromagnetic switch valve is provided with the 6th connector.
Preferably, the second inside cavities face is provided with the second limited block, and the second limited block be located at second piston body with
Between second connector.
Preferably, it is provided with cartridge filter block, cartridge filter lower port on cartridge filter lateral surface and above box top
The conical flow guiding set being gradually reduced from top to bottom provided with cross section.
Preferably, installation flat board be fixed on by support bar in tank floor, it is described installation flat board be provided with it is some with
Each one-to-one positioning through hole of cartridge filter, the liquid sample collection cylinder are plugged in positioning through hole, liquid sample collection cylinder
Surge drum block is provided with lateral surface and positioned at installation flat board top face.
Preferably, being provided with the web plate that can be taken off in heating water tank, web plate lower surface is provided with support feet, and web plate passes through branch
Spike is placed on heating water tank bottom surface.
Preferably, the upper surface of heating water tank is provided with alignment pin, the spacing flat board is provided with relative with alignment pin
The dowel hole answered.
Preferably, guide pin bushing is provided with the tight fixed bolt for being used for fixing guide pin bushing.
The beneficial effects of the invention are as follows:It is easy to operate, thickening efficiency is high, and can simultaneously to multiple extract solution samples carry out
Concentration and filtration treatment.
Brief description of the drawings
Fig. 1 is a kind of structural representation of the efficient process equipment of the fluid sample of the present invention.
Fig. 2 is a kind of structural representation of the nitrogen concentration mechanism of the present invention.
Fig. 3 is the sample liquid filter of the present invention and a kind of structural representation of the adaptive tight mechanism of communication type.
Fig. 4 is a kind of structural representation of the adaptive tight mechanism of communication type of the present invention.
In figure:Nitrogen concentration mechanism 1, vertical guide rod 11, guide pin bushing 12, tight fixed bolt 13, support flat board 14, the spray of vertical nitrogen
Pipe 15, heating water tank 16, web plate 17, spacing flat board 18, vertical limiting through hole 19;
Sample liquid filter 2, box-like body 21, case lid 22, annular side listrium 22a, cartridge filter 23, sealing-plug 23a, mistake
Filter cylinder block 24, filter membrane interlayer 25, liquid sample collection cylinder 26, surge drum block 27, installation flat board 28, pump orifice 29, the
Six connectors 210;
The adaptive tight mechanism 3 of communication type, inflation seal ring 31, the 3rd connector 32, the first connecting pipe 33, second
Connecting pipe 34, pressure conversion cylinder body 35, the first connector 36, the second connector 37, the 5th connector 38, the compression of the first pretension
Spring 39, the second cavity 310, the second limited block 311, second piston body 312, the 4th connector 313, the first cavity 314, first
Piston body 315, the first limited block 316.
Embodiment
The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings:
As shown in figure 1, a kind of efficient process equipment of fluid sample includes nitrogen concentration mechanism 1, sample liquid filter 2
And the adaptive tight mechanism 3 of communication type.
As shown in Fig. 2 nitrogen concentration mechanism includes vertical guide rod 11, the guide pin bushing 12 being slidably arranged on vertical guide rod,
The support flat board 14 and the heating water tank 16 of upper end open being arranged on guide pin bushing.Guide pin bushing is provided with the clamp screw for being used for fixing guide pin bushing
Bolt 13.Heater and temperature-detecting device are provided with heating water tank.The web plate 17 that can be taken off is provided with heating water tank.Web plate water
It is flat to set.Web plate lower surface is provided with support feet, and web plate is placed on heating water tank bottom surface by support feet.Support feet is to stretch
Contracting support feet.Web plate is located at below the water surface of heating water tank.The upper surface of heating water tank is provided with spacing flat board 18.Heating water tank
Upper surface be provided with alignment pin.Spacing flat board is provided with the dowel hole corresponding with alignment pin.Spacing flatbed horizontal is set.
Spacing flat board is provided with some vertical limiting through hole 19.Flatbed horizontal is supported to set.Flat board is supported to be provided with some and each vertical
Limiting through hole vertical nitrogen sparge tube 15 correspondingly.
As shown in figure 3, sample liquid filter includes the casing with sealed internal chamber, the fluid sample being arranged in casing
Collection device and vaccum-pumping equipment.The box-like body 21 of casing including upper end open and for seal hide box-like body and upper end open
The case lid 22 of mouth.Case lid edge is provided with the annular side listrium 22a that a circle down extends, and annular side listrium is set in box-like body
On.Vaccum-pumping equipment is connected by vacuum lead with the inner chamber of casing, and specifically, box-like body lateral surface is provided with suction
Mouth 29, vaccum-pumping equipment is connected by vacuum lead with pump orifice.
Box top is provided with some grafting through holes, and specifically, case lid top surface is provided with some grafting through holes.Grafting is led to
Hole is vertically arranged.The cartridge filter 23 of upper and lower ends opening is inserted with each grafting through hole.Sealing is provided with the upper port of cartridge filter
23a is filled in, and sealing-plug can be taken off.The bottom of cartridge filter is provided with filter membrane interlayer 25.On cartridge filter lateral surface and it is located at casing top
Cartridge filter block 24 is provided with above face.Cartridge filter lower port is provided with the conical flow guiding set that cross section is gradually reduced from top to bottom.Connect
The first sealing ring is provided between through hole medial surface and cartridge filter.First sealing ring, which is arranged on, to be connected on the medial surface of hole.
Liquid sample collection device include the installation flat board 28 that is arranged in casing and be arranged on installation flat board and with it is each
The one-to-one liquid sample collection cylinder 26 of cartridge filter.Flatbed horizontal is installed to set.Installation flat board is fixed on case by support bar
On body bottom surface.Flat board is installed and is provided with some and one-to-one positioning through hole of each cartridge filter.Liquid sample collection cylinder is plugged in
In positioning through hole.Surge drum block 27 is provided with liquid sample collection cylinder lateral surface and positioned at installation flat board top face.Liquid
Sample collection cylinder is located at below cartridge filter.
As shown in Figure 3, Figure 4, the adaptive tight mechanism 3 of communication type includes the installation being arranged on annular side listrium medial surface
Groove, the inflation seal ring 31 and pressure conversion cylinder body 35 being arranged in mounting groove.The inner chamber of pressure conversion cylinder body is stepped.
The inner chamber of pressure conversion cylinder body is made up of interconnected the first cavity 314 and the second cavity 310, and the internal diameter of the first cavity is big
In the internal diameter of the second cavity.First piston body 315 is provided with first cavity.It is provided with second piston body 312 in second cavity, and the
It is connected between one piston body and second piston body by head rod.Close to the one of first piston body on pressure conversion cylinder body
End opening, close to the closing of one end of second piston body.First inside cavities face is provided with the first limited block 316, and first is spacing
Block is located at first piston body opposite sides with second piston body.Second inside cavities face is provided with the second limited block 311, and second
Limited block is between second piston body and the second connector.Second cavity is spacing provided with first piston body can be made to be resisted against first
The first pretension compression spring 39 on block, and the first pretension compression spring is located at second piston body phase to two with first piston body
Side.
Pressure conversion cylinder body lateral surface is provided with the first connector 36 and the second connector 37.First connector and the first chamber
Body phase connects, and the first connector is between first piston body and second piston body.Second connector is connected with the second cavity
It is logical, and the second connector is located at second piston body opposite sides with first piston body.Box-like body lateral surface is provided with the 3rd and connected
Interface 32.Pressure conversion cylinder body lateral surface is provided with the 4th connector 313 being connected with the first cavity, and the 4th connector position
Between first piston body and second piston body.Electromagnetic switch valve is provided with 4th connector.On pressure conversion cylinder body lateral surface
Provided with the 5th connector 38 being connected with the second cavity, and the 5th connector is located at second piston body phase pair with first piston body
Both sides.Electromagnetic switch valve is provided with 5th connector.Box-like body lateral surface is provided with the 6th with main box intracavity inter-connection
Connector 210.Electromagnetic switch valve is provided with 6th connector.Inflation seal ring, which is provided with, fills exhaust nozzle.First connector with
It is connected between 3rd connector by the first connecting pipe 33.Second connector and fill between exhaust nozzle by the second communicating pipe
Road 34 is connected.
The specific work process of the efficient process equipment of the fluid sample of the present invention is as follows:
First, the sample cell equipped with aquatic product extract is inserted in vertical limiting through hole, and the lower end of sample cell is supported
Lean against on web plate;Now, the aquatic product extract in sample cell is heated by the hot water of heating water tank;
Second, the vertical nitrogen sparge tube on flat board will be supported to move down, the lower end of vertical nitrogen sparge tube is extend into sample
The bottom of QC;Then, it is dense toward being blown into nitrogen or air in extract solution the extract solution of heating being carried out by vertical nitrogen sparge tube
Contracting is handled.Hot water in heating water tank coordinates vertical nitrogen sparge tube to carry out concentration to the extract solution sample of aquatic products simultaneously.
3rd, after completing concentration, vertical nitrogen sparge tube stops jet, and the vertical nitrogen sparge tube that will be supported on flat board
Up move;Then, add organic solvent toward sample cell and take out and shake up.
4th, the sealing-plug of cartridge filter upper end is removed, then poured into the liquid in sample cell in cartridge filter;
5th, the electromagnetic switch valve closed at the four, the 5th and the 6th connector, and vaccum-pumping equipment is opened to casing
Inner chamber is vacuumized, and the extract solution in cartridge filter is passed through liquid sample collection cylinder corresponding to inflow after the filtering of filter membrane interlayer
It is interior.
As shown in Figure 3, Figure 4, during vaccum-pumping equipment vacuumizes to the inner chamber of casing, due to first piston
Communication type inner chamber of cylinder block between body and second piston body is by the first connecting pipe and the intracavity inter-connection of main box, and
The cross-sectional area of one piston body is more than the cross-sectional area of second piston body;The thus first piston body and second in vacuum
Air pressure between piston body reduces, and makes second piston body toward the second spacing Block direction movement, so as to by the gas in communication type cylinder body
Body is pressed into intracavitary in the annular inflatable of inflation seal ring by the second connecting pipe, expands inflation seal ring, Jin Erbao
Card inflation seal ring forms reliable sealing between case lid and box-like body.
6th, vaccum-pumping equipment is closed, while the electromagnetic switch valve at the four, the 5th and the 6th connector is opened,
So that first piston body and second piston body reset in the presence of pretension compression spring, now inflation seal ring shrinks
(Case lid is set smoothly to open/close);Then, opening box covers take out liquid sample collection cylinder.
Claims (8)
1. a kind of efficient process equipment of fluid sample, it is characterized in that, including nitrogen concentration mechanism, sample liquid filter and company
The adaptive tight mechanism of formula, nitrogen concentration mechanism include vertical guide rod, the guide pin bushing being slidably arranged on vertical guide rod,
The support flat board and the heating water tank of upper end open being arranged on guide pin bushing, the upper surface of the heating water tank are provided with spacing put down
Plate, and spacing flat board is provided with some vertical limiting through hole, the support flat board is provided with some and each vertical limiting through hole one
Vertical nitrogen sparge tube corresponding to one;
The sample liquid filter include with sealed internal chamber casing, the liquid sample collection device being arranged in casing and
Vaccum-pumping equipment, the vaccum-pumping equipment are connected by vacuum lead with the inner chamber of casing, if the box top is provided with
Grafting through hole is done, the cartridge filter of upper and lower ends opening is inserted with each grafting through hole, sealing-plug is provided with the upper port of cartridge filter,
The bottom of cartridge filter is provided with filter membrane interlayer, and the first sealing ring is provided between the grafting through hole medial surface and cartridge filter;It is described
Liquid sample collection device includes the installation flat board being arranged in casing and is arranged on installation flat board and with each cartridge filter one by one
Corresponding liquid sample collection cylinder, and liquid sample collection cylinder is located at below cartridge filter;
The box-like body of the casing including upper end open and for seal hide box-like body and upper end open case lid, the case
Lid edge is provided with the annular side listrium that a circle down extends, and annular side listrium is set on box-like body;
The adaptive tight mechanism of communication type includes the mounting groove being arranged on annular side listrium medial surface, is arranged on mounting groove
Interior inflation seal ring and pressure conversion cylinder body;
The inner chamber of the pressure conversion cylinder body is made up of interconnected the first cavity and the second cavity, and the internal diameter of the first cavity
More than the internal diameter of the second cavity;Being provided with first piston body in first cavity, the second cavity is interior to be provided with second piston body, and the
It is connected between one piston body and second piston body by head rod, close to first piston body on the pressure conversion cylinder body
One end open, close to the closing of one end of second piston body;
The first inside cavities face is provided with the first limited block, and the first limited block is located at first piston body with second piston body
Opposite sides, second cavity, which is provided with, can make the first pretension compression spring that first piston body is resisted against on the first limited block,
And first pretension compression spring and first piston body be located at second piston body opposite sides;
The pressure conversion cylinder body lateral surface is provided with the first connector and the second connector, the first connector and the first cavity phase
Connection, and the first connector is between first piston body and second piston body;Second connector is connected with the second cavity, and
Second connector is located at second piston body opposite sides with first piston body;The box-like body lateral surface is provided with the 3rd connection
Mouthful, the inflation seal ring, which is provided with, fills exhaust nozzle, is connected between first connector and the 3rd connector by first
Pipeline is connected, and second connector is connected with filling between exhaust nozzle by the second connecting pipe.
2. a kind of efficient process equipment of fluid sample according to claim 1, it is characterized in that, the pressure conversion cylinder body
Lateral surface is provided with the 4th connector being connected with the first cavity, and the 4th connector is located at first piston body and second piston
Between body, electromagnetic switch valve is provided with the 4th connector;Pressure conversion cylinder body lateral surface is provided with to be connected with the second cavity
The 5th logical connector, and the 5th connector is located at second piston body opposite sides, the 5th connector with first piston body
Place is provided with electromagnetic switch valve;The box-like body lateral surface is provided with the 6th connector, and electromagnetism is provided with the 6th connector
Switch valve.
3. a kind of efficient process equipment of fluid sample according to claim 1 or 2, it is characterized in that, second cavity
Medial surface is provided with the second limited block, and the second limited block is between second piston body and the second connector.
4. a kind of efficient process equipment of fluid sample according to claim 1, it is characterized in that, the cartridge filter lateral surface
Go up and be located above box top and be provided with cartridge filter block, cartridge filter lower port is provided with the cone that cross section is gradually reduced from top to bottom
Shape flow guide sleeve.
5. a kind of efficient process equipment of fluid sample according to claim 1, it is characterized in that, the installation flat board passes through
Support bar is fixed in tank floor, and the installation flat board is provided with some and one-to-one positioning through hole of each cartridge filter, institute
State liquid sample collection cylinder to be plugged in positioning through hole, on liquid sample collection cylinder lateral surface and positioned at installation flat board top face
Provided with surge drum block.
6. a kind of efficient process equipment of fluid sample according to claim 1, it is characterized in that, set in the heating water tank
There is the web plate that can be taken off, web plate lower surface is provided with support feet, and web plate is placed on heating water tank bottom surface by support feet.
7. a kind of efficient process equipment of fluid sample according to claim 1 or 2, it is characterized in that, the heating water tank
Upper surface be provided with alignment pin, the spacing flat board is provided with the dowel hole corresponding with alignment pin.
8. a kind of efficient process equipment of fluid sample according to claim 1 or 2, it is characterized in that, set on the guide pin bushing
There is the tight fixed bolt for fixing guide pin bushing.
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CN201510508001.1A CN105158052B (en) | 2015-08-18 | 2015-08-18 | A kind of efficient process equipment of fluid sample |
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CN105158052B true CN105158052B (en) | 2018-01-16 |
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Families Citing this family (4)
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CN106914045B (en) * | 2017-03-06 | 2019-03-26 | 深圳市易瑞生物技术股份有限公司 | A kind of filter device and its application before food safety detection solid sample in processing |
CN108825907B (en) * | 2018-05-21 | 2023-08-18 | 泰通科技(广州)有限公司 | Sealing head special for sample sampling tube |
CN111766129A (en) * | 2020-06-18 | 2020-10-13 | 浙江省海洋水产研究所 | Heating and cooling device for chemical oxygen demand digestion test |
CN112924266B (en) * | 2020-12-25 | 2024-01-19 | 湖北鼎泰高科有限公司 | Column insert and nitrogen blowing assembly of solid phase extraction nitrogen blowing concentrator |
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CN201354188Y (en) * | 2009-02-20 | 2009-12-02 | 吴悠 | Novel sealing bottle cap |
CN201819828U (en) * | 2010-08-31 | 2011-05-04 | 潍坊瑞格测试仪器有限公司 | Nitrogen blowing concentrator |
CN103063785A (en) * | 2012-12-27 | 2013-04-24 | 大连依利特分析仪器有限公司 | Multi-functional pretreatment device used for amino acid analysis |
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