CN103558061B - A kind of sampling head of fast sampling - Google Patents
A kind of sampling head of fast sampling Download PDFInfo
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- CN103558061B CN103558061B CN201310522331.7A CN201310522331A CN103558061B CN 103558061 B CN103558061 B CN 103558061B CN 201310522331 A CN201310522331 A CN 201310522331A CN 103558061 B CN103558061 B CN 103558061B
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- internal diameter
- capillary tube
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- 238000005070 sampling Methods 0.000 title claims abstract description 56
- 239000007788 liquid Substances 0.000 claims abstract description 70
- 239000003638 chemical reducing agent Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 230000000052 comparative effect Effects 0.000 description 15
- 239000012530 fluid Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 210000005239 tubule Anatomy 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 2
- 239000008280 blood Substances 0.000 description 2
- 210000004369 blood Anatomy 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000023555 blood coagulation Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- -1 terpene lactones Chemical class 0.000 description 1
- 235000007586 terpenes Nutrition 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Sampling And Sample Adjustment (AREA)
Abstract
The present invention relates to a kind of sampling head, particularly relate to the sampling head of a kind of fast sampling, it capillary tube included is made up of the isometrical body of the internal diameter being connected and internal diameter reducing body；One end of the isometrical body of described internal diameter is provided with liquid inlet, and one end of described internal diameter reducing body is provided with liquid outlet；Liquid outlet internal diameter is 0.3 ~ 0.8:1 with the ratio of liquid inlet internal diameter.The sampling head of the present invention is applicable to the quantitative sampling of biology, chemistry, medical domain, has easy to use, the advantage significantly improving sampling rate.
Description
Technical field
The present invention relates to a kind of sampling head, particularly relate to the sampling head of a kind of fast sampling, it is applicable to biology, change
, the quantitative sampling of medical domain.
Background technology
Capillary tube has a wide range of applications in the sampling process of turbidimetric test, and it is generally used for trace or in a small amount sample
Sampling.Existing capillary tube is generally capillary glass tube, and it is relatively costly, and the waste caused after using and abandoning is bigger.?
Through have developed the capillary tube of Integral injection molding, it can greatly reduce cost compared with capillary glass tube, but and glass fiber
Tubule is identical, and it is the tubular structure that internal diameter is small and homogeneous.The internal diameter of the two is usually 0.2 ~ 2mm, it is ensured that permissible
It is automatically drawn into liquid by the siphonage of capillary tube.
From Bernoulli (Bernoulli) law, i.e. formula (1).
Formula (1)
In formula, p is the pressure of fluid；
ρ is the density of fluid；
V is fluid velocity；
H is plumb height；
G is acceleration of gravity；
C is constant.
Above formula every the pressure energy p of representation unit volume fluid, gravitional force ρ gh and kinetic energy (1/2) * ρ v respectively2, on edge
During stream line motion, summation keeps constant, i.e. total terpene lactones.Flowing medium velocity increases, and pressure is reduced by；Speed reduces,
Pressure just increases.So along with liquid increase of lifting height in capillary tube, gravitional force increases, and speed can reduce therewith,
Pressure increases further.Liquid can speed be slowed by when rising to about the 80% of capillary tube total height, and remaining about 20%
Highly rise time big appointment is more than 10 times of early stage.
Therefore, the existing capillary tube longer liquid that even cannot suck sample time is to top, thus does not reaches quantitative
Purpose.But in some are tested, especially needing the sample gathered is blood sample, if sample time is longer, needs after wound blood coagulation
Again puncture and take blood, certain body burden can be caused to experimenter.Accordingly, it would be desirable to develop one can improve sample rate
Capillary tube.
Summary of the invention
It is an object of the invention to provide a kind of convenient use, the sampling head of fast sampling can be realized.
In order to achieve the above object, the present invention is by the following technical solutions:
The sampling head of the present invention includes capillary tube, and described capillary tube is made up of internal diameter reducing body, described internal diameter reducer pipe
One end of body is provided with liquid inlet, and the other end of described internal diameter reducing body is provided with liquid outlet, the liquid of described capillary tube
Body exit inside diameter is 0.3 ~ 0.8:1 with the ratio of liquid inlet internal diameter；
Or described capillary tube is made up of the isometrical body of the internal diameter being connected and internal diameter reducing body, described internal diameter equal pipe
One end of body is provided with liquid inlet, and one end of described internal diameter reducing body is provided with liquid outlet；
The liquid outlet internal diameter of described capillary tube and the ratio of liquid inlet internal diameter are 0.3 ~ 0.8:1.
Further, the isometrical body of internal diameter of the present invention is 0～90:1 with the length ratio of internal diameter reducing body.
Further, when capillary tube of the present invention is made up of the isometrical body of the internal diameter being connected and internal diameter reducing body,
The isometrical body of described internal diameter is 5 ~ 20:1 with the length ratio of internal diameter reducing body.
Further, when capillary tube of the present invention is made up of the isometrical body of the internal diameter being connected and internal diameter reducing body,
Described liquid inlet internal diameter is 0.5 ~ 2.0:1 with the ratio of the length of described internal diameter reducing body.
Further, when capillary tube of the present invention is made up of the isometrical body of the internal diameter being connected and internal diameter reducing body,
Described liquid inlet internal diameter is 0.7 ~ 1.0:1 with the ratio of the length of described internal diameter reducing body.
Further, a length of the 5～15mm of capillary tube of the present invention.
Further, present invention additionally comprises the support for fixed capillary；1 ~ 2 capillary it is fixed with on described support
Pipe.
Further, present invention additionally comprises and be fixed on the fixing post of back-end support.
The capillary tube of the present invention refers to that internal diameter is little, and liquid can be made within it to overcome centrifugal force to rise or fall
Tubule, the usually tubule of internal diameter 0.2 ~ 2mm.The capillary tube of the present invention can be quantitative capillary tube can also be normal capillary
Pipe.
The isometrical body of internal diameter of the present invention and internal diameter reducing body ratio are 0～90:1, when the isometrical body of internal diameter is with interior
When the ratio of footpath reducing body is 0:1, for there is no the isometrical body of internal diameter, the capillary tube of uniform reducing.But it is isometrical to arrange internal diameter
Body can shorten the length of sampling head when reaching same sampling rate.
Being fixed with 1 ~ 2 capillary tube on support of the present invention, fixed form can be that those skilled in the art use
Conventional fixed form, such as grafting etc., it is also possible to be the mode of integrated injection forming.
The fixing post being fixed on back-end support of the present invention, fixing post can be this area with the fixed form of support
The conventional fixed form that technical staff uses, such as grafting etc., it is also possible to be the mode of integrated injection forming.
The good effect that the present invention uses technique scheme to be obtained is:
The internal diameter of the quantitative capillary tube of the present invention uses and becomes size design, and exit inside diameter is less than inlet inside diameter, accelerates liquid
Body sample enters the speed of capillary tube, according to Bernoulli equation, formula (2)；The fluid of a steady flow is had, at pipeline in pipeline
The height of the fluid column in vertical opening tubule at different cross section is different, shows in the liquid of steady flow, the ground that flow velocity is big
Side's pressure is little, and the local pressure that flow velocity is little is big.
P+(pv2/ 2)=constant formula (2)
In formula, p is the pressure of fluid
ρ is the density of fluid；
V is fluid velocity；
The flow velocity of capillary liquid in pipe and the internal diameter (d) of capillary tube and suction liquid is understood according to absorption motive power formula (3)
The height (H) of body is relevant, and in height one timing of capillary tube, the internal diameter reducing capillary tube can improve the flow velocity of fluid, enter one
Step reduces the pressure of fluid.
V=√ [(2gH)/(1+ ζ+λ L/d)] formula (3)
In formula, √ is radical sign；
V is siphon mean velocity in section；
G is acceleration of gravity；
H is the acting head of capillary tube, i.e. the capillary inlet end water surface and the discrepancy in elevation of the port of export water surface；
ζ is the coefficient of partial resistance of capillary tube；
λ is the frictional resistant coefficient of capillary tube；
D is the internal diameter of capillary tube.
The liquid outlet internal diameter of the present invention and the ratio of liquid inlet internal diameter are 0.3 ~ 0.8:1, reduce liquid outlet internal diameter,
Can improve inner air flowing speed, reduce internal pressure, thus in being effectively improved sampling head liquid last 20% rising
Speed；Simultaneously as reduce sampling head internal diameter, it is effectively increased again siphon flow velocity.
The internal diameter of the present invention is connected by the isometrical body of the internal diameter of intercommunication and internal diameter reducing body and forms；Described internal diameter equal pipe
Body is 0～90:1 with the length ratio of internal diameter reducing body；When sample rate one timing, arranging the isometrical body of internal diameter can reduce
The length of capillary tube.
The structure of the present invention is particularly well-suited to the capillary tube of a length of 5 ~ 15mm.
Capillary tube is gripped when the support of the present invention can conveniently use.
Grafting of the present invention is entered use on quantitative filling device by the fixing post of the present invention for when needed.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention 1；
Fig. 2 is the structural representation of the embodiment of the present invention 2；
Fig. 3 is the cross-sectional schematic of the embodiment of the present invention 2；
Fig. 4 is the structural representation of the embodiment of the present invention 3；
In the accompanying drawings, 1 capillary tube, 1-1 liquid outlet, 1-2 liquid inlet, the isometrical body of 1-3 internal diameter, 1-4 internal diameter reducing
Body, 2 supports, 3 fix post.
Detailed description of the invention
The cross section of quantitative capillary tube 1 internal diameter of the present invention general for circle, as known to those skilled in the art,
The shape of quantitative capillary tube internal diameter cross section does not interferes with its effect used.
Alternatively, the present invention can be used alone, it is also possible to quantitative filling device with the use of, therein quantitatively add
Note device includes but not limited to that the charging point part disclosed in commercially available quantitative filling device or patent CN202204706U is (without capillary
The part of pipe).
Capillary tube is gripped when the support of the present invention can conveniently use.The fixing post of the present invention is for when needed by this
Bright grafting enters use on quantitative filling device.
The present invention can enter use on quantitative filling device by the grafting of fixing post 3, further for the choosing of fixing post quantity
Select, be 1 or multiple function all not interfering with its grafting itself, and according to the needs of concrete grafting technique, select fixing
The shape of post and quantity are that those skilled in the art can judge according to common knowledge and select.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.
Multiple amendment to these embodiments will be apparent from for those skilled in the art, as defined herein
General Principle can realize without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein and features of novelty phase one
The widest scope caused.
Embodiment 1
As it is shown in figure 1, the capillary tube 1 described in the present embodiment is by the internal diameter being connected isometrical body 1-3 and internal diameter reducer pipe
Body 1-4 is connected composition；One end of described internal diameter isometrical body 1-3 is provided with liquid inlet 1-2, described internal diameter reducing body 1-4
One end be provided with liquid outlet 1-1；Described liquid outlet 1-1 internal diameter (D1) with the ratio of liquid inlet 1-2 internal diameter (D2) is
0.5:1；The length (L2) of described internal diameter isometrical body 1-3 is 20:1 with the ratio of the length (L1) of internal diameter reducing body 1-4；
Described liquid inlet (1-2) internal diameter (D2) is 1:1 with the ratio of the length (L1) of described internal diameter reducing body；Capillary pipe length is
10mm。
The technique effect of this capillary tube is: can increase substantially sample rate, relevant to the mobility of gathered sample,
Sampling rate 5 ~ 20 times can be improved.
Embodiment 2
As shown in Figures 2 and 3, the present embodiment includes support 2, the capillary tube 1 being fixed on support front end and is fixed on
The fixing post 3 of frame 2 rear end.
Described capillary tube 1 is connected by the internal diameter being connected isometrical body 1-3 and internal diameter reducing body 1-4 and forms；Described
One end of internal diameter isometrical body 1-3 is provided with liquid inlet 1-2, and the other end of described internal diameter reducing body 1-4 is provided with liquid
Outlet 1-1；Described liquid outlet 1-1 internal diameter (D1) is 0.3:1 with the ratio of liquid inlet 1-2 internal diameter (D2)；Described internal diameter etc.
The length (L2) of footpath body 1-3 is 30:1 with the ratio of the length (L1) of internal diameter reducing body 1-4；Described liquid inlet (1-2)
Internal diameter (D2) is 1.2:1 with the ratio of the length (L1) of described internal diameter reducing body；Capillary pipe length is 15mm.
The technique effect of this capillary tube is: can increase substantially sample rate, relevant to the mobility of gathered sample,
Sampling rate 5 ~ 20 times can be improved.
Embodiment 3
As shown in Figure 4, the capillary tube 1 described in the present embodiment is made up of internal diameter reducing body 1-4, described internal diameter reducing body
One end of 1-4 is provided with liquid inlet 1-2, and the other end of described internal diameter reducing body 1-4 is provided with liquid outlet 1-1, described
The liquid outlet 1-1 internal diameter of capillary tube 1 and the ratio of liquid inlet 1-2 internal diameter are 0.7:1；Described liquid inlet 1-2 internal diameter
(D2) ratio with the length (L1) of described internal diameter reducing body is 0.5:1；Capillary pipe length is 5mm.
The technique effect of this capillary tube is: can increase substantially sample rate, relevant to the mobility of gathered sample,
Sampling rate 5 ~ 20 times can be improved.
Embodiment 4 ~ 9
The internal diameter differing only in capillary tube of embodiment 4 ~ 9 and embodiment 1 and 2 and shape, its parameter such as table 1 institute
Show.
Comparative example 1 ~ 4
The internal diameter differing only in capillary tube of comparative example 1 ~ 4 and embodiment 1 and 2 and shape, if comparative example 1 is that internal diameter is equal
The capillary tube of one, the exit inside diameter of the capillary tube of comparative example 2 is only the capillary tube of the 0.2 of inlet inside diameter, the parameter of each comparative example
As shown in table 1.
Each embodiment is as shown in table 1 with the comparison of comparative example.And gather water by the sampling head of each embodiment and comparative example
Time length ratio relatively its sampling rate.
Table 1 embodiment 1 ~ 9 and the experimental data of comparative example
From the test data of table 1, under identical sampling medium (water), by changing the inside caliber structure of capillary tube
Make, thus it is possible to vary the time of sampling.As described in Example 2, when the ratio of liquid outlet internal diameter (D1) Yu liquid inlet internal diameter (D2)
When example is 0.3:1, although its capillary pipe length is 1.5 times of comparative example 1 capillary pipe length, but when the most substantially shortening sampling
Between, illustrate that sample rate significantly increases.As described in Example 4, when liquid outlet internal diameter (D1) and liquid inlet internal diameter (D2)
When ratio is 0.8:1, although capillary pipe length is shorter than the capillary pipe length of comparative example 1, but it is only comparative example 1 sample time
1/4, sampling rate significantly increases.As shown in other embodiments, when liquid outlet internal diameter (D1) and liquid inlet internal diameter (D2)
Ratio when being 0.3 ~ 0.8:1, be respectively provided with the effect significantly increasing sampling rate.Especially embodiment 6 and embodiment 7, work as liquid
When the ratio of body exit inside diameter (D1) and liquid inlet internal diameter (D2) is 0.5 ~ 0.6:1, although capillary pipe length is comparative example 1 mao
About 1.5 times of capillary length, but the minimizing of highly significant sample time.
Further, the ratio of the length (L2) of the isometrical body of internal diameter and the length (L1) of internal diameter reducing body, and liquid enters
The ratio of the length (L1) of mouth 1-2 internal diameter (D2) and internal diameter reducing body, with aforesaid liquid exit inside diameter (D1) and liquid inlet
The ratio of internal diameter (D2) has synergism, shows using of embodiment 6 and embodiment 9, the liquid outlet internal diameter of the two
(D1) ratio with liquid inlet internal diameter (D2) is 0.6:1, and the synergism of embodiment 6 is more obvious than embodiment 9；In table 1
Shown data, when the length (L2) of the isometrical body of internal diameter is 5 ~ 20:1 with the ratio of the length (L1) of internal diameter reducing body,
When the ratio of the length (L1) of liquid inlet 1-2 internal diameter (D2) and internal diameter reducing body is 0.7 ~ 1.0:1, its synergism is more
Substantially.This conclusion can be further characterized by by comparative example 2 and comparative example 4.
Furthermore liquid outlet internal diameter (D1) is to affect the master of capillary tube sample rate with the ratio of liquid inlet internal diameter (D2)
Wanting factor, as shown in comparative example 3, although the value of its dependent variable, i.e. L2/L1 with D2/L1 meets the requirements, but the value of D1/D2 is
0.9, now the impact on capillary tube sample rate is less, it is impossible to reach the remarkable result that the present invention is expected.
Claims (11)
1. the sampling head of a fast sampling, it is characterised in that it includes capillary tube (1),
Described capillary tube (1) is made up of internal diameter reducing body (1-4), and one end of described internal diameter reducing body (1-4) is provided with liquid
Body entrance (1-2), the other end of described internal diameter reducing body (1-4) is provided with liquid outlet (1-1), described capillary tube (1)
Liquid outlet (1-1) internal diameter is 0.3 ~ 0.8:1 with the ratio of liquid inlet (1-2) internal diameter；
Or described capillary tube (1) is made up of the isometrical body of the internal diameter being connected (1-3) and internal diameter reducing body (1-4), described
One end of the isometrical body of internal diameter (1-3) is provided with liquid inlet (1-2), and one end of described internal diameter reducing body (1-4) is provided with
Liquid outlet (1-1)；
Liquid outlet (1-1) internal diameter of described capillary tube (1) and the ratio of liquid inlet (1-2) internal diameter are 0.3 ~ 0.8:1.
The sampling head of fast sampling the most according to claim 1, it is characterised in that the isometrical body of described internal diameter (1-3) is with interior
The length ratio in footpath reducing body (1-4) is 0～90:1.
The sampling head of fast sampling the most according to claim 2, it is characterised in that when described capillary tube (1) is by be connected
When the isometrical body of internal diameter (1-3) and internal diameter reducing body (1-4) composition, the isometrical body of described internal diameter (1-3) and internal diameter reducer pipe
The length ratio of body (1-4) is 5 ~ 20:1.
4. according to the sampling head of the fast sampling described in any one of claim 1 ~ 3, it is characterised in that when described capillary tube
(1) when being made up of the isometrical body of the internal diameter being connected (1-3) and internal diameter reducing body (1-4), described liquid inlet (1-2) internal diameter
It is 0.5 ~ 2.0:1 with the ratio of the length of described internal diameter reducing body (1-4).
The sampling head of fast sampling the most according to claim 4, it is characterised in that when described capillary tube (1) is by the internal diameter being connected
When isometrical body (1-3) and internal diameter reducing body (1-4) composition, described liquid inlet (1-2) internal diameter and described internal diameter reducer pipe
The ratio of the length of body (1-4) is 0.7 ~ 1.0:1.
6. according to the sampling head of the fast sampling described in any one of claim 1 ~ 3, it is characterised in that described capillary tube (1)
A length of 5～15mm.
The sampling head of fast sampling the most according to claim 4, it is characterised in that described capillary tube (1) a length of 5～
15mm。
The sampling head of fast sampling the most according to claim 5, it is characterised in that described capillary tube (1) a length of 5～
15mm。
9. according to the sampling head of the fast sampling described in any one of claim 1 ~ 3, it is characterised in that its also include for
The support (2) of fixed capillary (1)；1 ~ 2 capillary tube (1) it is fixed with on described support (2).
The sampling head of fast sampling the most according to claim 9, it is characterised in that after it also includes being fixed on support (2)
The fixing post (3) of end.
The application in fast sampling of the sampling head of 11. 1 kinds of fast samplings as claimed in claim 1.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310522331.7A CN103558061B (en) | 2013-10-30 | 2013-10-30 | A kind of sampling head of fast sampling |
| PCT/CN2014/089788 WO2015062505A1 (en) | 2013-10-30 | 2014-10-29 | Sampling head for quick sampling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310522331.7A CN103558061B (en) | 2013-10-30 | 2013-10-30 | A kind of sampling head of fast sampling |
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| Publication Number | Publication Date |
|---|---|
| CN103558061A CN103558061A (en) | 2014-02-05 |
| CN103558061B true CN103558061B (en) | 2016-09-28 |
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| CN201310522331.7A Active CN103558061B (en) | 2013-10-30 | 2013-10-30 | A kind of sampling head of fast sampling |
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| Country | Link |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015062505A1 (en) * | 2013-10-30 | 2015-05-07 | 石家庄禾柏生物技术股份有限公司 | Sampling head for quick sampling |
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| DD256194A1 (en) * | 1985-10-31 | 1988-04-27 | Akad Wissenschaften Ddr | CAPILLARY HULL FOR GAS CHROMATOGRAPHY |
| CN2179482Y (en) * | 1993-07-24 | 1994-10-12 | 高增芳 | Automatic siphon device |
| CN1309284A (en) * | 2000-09-09 | 2001-08-22 | 党晓民 | Design method and equipment of built-in dual-venturi fluid measurer |
| CN2469932Y (en) * | 2000-07-24 | 2002-01-09 | 烟台凯瑞医用设备开发有限公司 | Medical low-flow-resistance blood-taking tubelihe |
| CN1342901A (en) * | 2000-09-13 | 2002-04-03 | 中国科学院大连化学物理研究所 | Filled large-mouth capillary column |
| CN201029290Y (en) * | 2007-02-14 | 2008-03-05 | 甘肃省农业科学院 | Venturi type fertilizer sucking machine |
| CN201057178Y (en) * | 2007-05-31 | 2008-05-07 | 重庆特瑞尔分析仪器有限公司 | Pneumatic sampling pump |
| CN101990631A (en) * | 2008-02-15 | 2011-03-23 | 3M创新有限公司 | Sample acquisition device |
| CN201978757U (en) * | 2011-02-18 | 2011-09-21 | 中国热带农业科学院分析测试中心 | Trumpet-shaped wide-opening pipettor |
| CN202204701U (en) * | 2011-08-12 | 2012-04-25 | 石家庄禾柏生物技术股份有限公司 | Quantitative capillary tube |
| CN203616170U (en) * | 2013-10-30 | 2014-05-28 | 石家庄禾柏生物技术股份有限公司 | Sampling head capable of realizing rapid sampling |
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2013
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD256194A1 (en) * | 1985-10-31 | 1988-04-27 | Akad Wissenschaften Ddr | CAPILLARY HULL FOR GAS CHROMATOGRAPHY |
| CN86201174U (en) * | 1986-03-03 | 1986-12-03 | 赵兴龙 | Auto-start siphon with one-way valve |
| CN2179482Y (en) * | 1993-07-24 | 1994-10-12 | 高增芳 | Automatic siphon device |
| CN2469932Y (en) * | 2000-07-24 | 2002-01-09 | 烟台凯瑞医用设备开发有限公司 | Medical low-flow-resistance blood-taking tubelihe |
| CN1309284A (en) * | 2000-09-09 | 2001-08-22 | 党晓民 | Design method and equipment of built-in dual-venturi fluid measurer |
| CN1342901A (en) * | 2000-09-13 | 2002-04-03 | 中国科学院大连化学物理研究所 | Filled large-mouth capillary column |
| CN201029290Y (en) * | 2007-02-14 | 2008-03-05 | 甘肃省农业科学院 | Venturi type fertilizer sucking machine |
| CN201057178Y (en) * | 2007-05-31 | 2008-05-07 | 重庆特瑞尔分析仪器有限公司 | Pneumatic sampling pump |
| CN101990631A (en) * | 2008-02-15 | 2011-03-23 | 3M创新有限公司 | Sample acquisition device |
| CN201978757U (en) * | 2011-02-18 | 2011-09-21 | 中国热带农业科学院分析测试中心 | Trumpet-shaped wide-opening pipettor |
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| Publication number | Publication date |
|---|---|
| CN103558061A (en) | 2014-02-05 |
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