CN103316505A - Solid-phase micro extraction device and using method of device - Google Patents
Solid-phase micro extraction device and using method of device Download PDFInfo
- Publication number
- CN103316505A CN103316505A CN2013102812790A CN201310281279A CN103316505A CN 103316505 A CN103316505 A CN 103316505A CN 2013102812790 A CN2013102812790 A CN 2013102812790A CN 201310281279 A CN201310281279 A CN 201310281279A CN 103316505 A CN103316505 A CN 103316505A
- Authority
- CN
- China
- Prior art keywords
- extracting
- extraction
- tube
- cavity
- solid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Sampling And Sample Adjustment (AREA)
Abstract
The invention provides a solid-phase micro extraction device comprising an extraction device, an injection device and an extraction pipe, wherein a first hollow cavity and a second hollow cavity, which are on the same axial line, are arranged in the extraction pipe; the internal diameter of the first hollow cavity is greater than that of the second hollow cavity, and one end of the first hollow cavity is communicated with one end of the second hollow cavity via an open pore; the other end of the first hollow cavity is communicated with the outside via the open pore; and the other end of the second hollow cavity is still communicated with the outside via the open pore. The solid-phase micro extraction device has the advantages that expensive extraction fiber heads are not needed and the device can be used at normal pressure. Furthermore, the concentration of analytical solution subjected to material extraction is high and the analytical solution can be easily and accurately quantified because the device is integrally structured and the internal dead volume of the device is small, so that a concentration step is omitted, the extraction steps are reduced, and the working efficiency is improved; no solution leaks in the extraction step, and the available flow rate is greater because of the sizes of the hollow cavities in the extraction pipe and the internal pressure in extraction steps is small, so that the permeability of an extraction substance is good.
Description
Technical field
The present invention relates to a kind of extraction equipment, and a kind of method for extraction, relate in particular to fiber material and the preparation method in SPME field, and be used for the device and method of SPME.
Background technology
SPME (solid-phase microextraction, SPME) technology is sample pre-treatments and the beneficiation technologies of a novelty of the rise nineties in 20th century, it developed research by the Pawliszyn professor's of Canadian Waterloo university research group in 1989 at first first, belonged to non-solvent selective extraction method.Immerse fiber head in the sample solution or head space gas in a period of time, simultaneously agitating solution to be accelerating the two alternate speed that reach balance, behind the ready to balance fiber head taken out and inserts gas-chromatography vaporizer, the material that adsorbs on the thermal desorption coating.Extract imports chromatographic column by mobile phase with it in vaporizer after the desorb, the overall process that finish extractions, separation, concentrates.
At present solid-phase micro-extracting device commonly used comprises fiber head or extracting head, handle.Fiber head or extracting head are the vitreous silica fiber heads that the 1cm of an outer casing stainless steel tubule is long, scribble different chromatographic stationary phases or adsorbent, and fiber head is retractable in stainless steel tube, is used for extraction, adsorption sample; Handle is used for installing or the fixed extractor head, can forever use.
But the weak point of existing micro-extraction device is:
(1) the extracting fiber head is subject to operating influence and damages;
(2) the extraction specific area of extracting fiber head is lower;
(3) the import solid-phase micro-extracting device is expensive.
And, use this micro-extraction device, its extracting process also has following deficiency:
(1) extraction yield of infiltration type or head space formula extraction mode is not high;
(2) infiltration type extraction mode, easy loss fiber head, so that fiber head is short service life, production cost is high.
In the SPE field, solid-phase extraction device critical piece commonly used comprises extraction column etc. at present, if directly do SPME with this device, can finish extraction although need not extracting fiber head and high-tension apparatus, but every less important approximately sample solution of hundreds of milliliter that fills in the extraction column, sample solution is residual many during extraction, dead volume is large, desorbed solution concentration is low, simultaneously can't accurate quantification, and the later stage also need concentrate, the constant volume step just can be finished extraction quantitatively, waste time and energy, troublesome poeration is compared with micro-extraction technique, complex operation is arranged, easily introduce the deficiency of human error.
Summary of the invention
Main purpose of the present invention is to provide a kind of solid-phase micro-extracting device and using method thereof, solves problems of the prior art and deficiency.
In order to achieve the above object, the invention provides a kind of solid-phase micro-extracting device, comprise draw-out device, injection device and an extracting tube; The first cavity and the second cavity on same axis are arranged in the described extracting tube, and the internal diameter of the first cavity is greater than the second cavity; The first end of described the first cavity is connected with the external world by one first perforate; The first end of described the second cavity is connected with the external world by one second perforate; The second end of two cavitys is oppositely arranged, and is connected by one the 3rd perforate; Described draw-out device comprises an injection-tube, and injection-tube axially is provided with the first through hole; The first end Joint of described draw-out device one end and extracting tube the first cavity, and the first through hole is connected with the first cavity; Described injection device comprises a needle stand, and needle ingot shaft upwards is provided with third through-hole; The first end Joint of described injection device one end and extracting tube the second cavity, and third through-hole is connected with the second cavity.
This device need not to use expensive extracting fiber head, can use under the normal pressure, reduces cost, and simple in structure, easy to use.In addition, because apparatus structure is integrated, inner dead volume is little, and desorbed solution is high by the concentration behind the fiber material, and easily accurate quantitative analysis need not to pass through concentration step again, has reduced extraction step, has improved operating efficiency; Equally, because integrally in the extracting tube, with respect to other extracting tubes that is formed by a plurality of assemblies such as extraction columns, the extracting tube of this device can leakage in when extraction, and after integrated, has removed the part assembly, the size of extracting tube internal cavities is relatively large, internal pressure is less during extraction, and available flow velocity is larger, so the permeability of extracting substance is better.
Further, described extracting tube also comprises the first junction and the second junction; Described the first junction is a groove, is connected with the first cavity, and is provided with internal thread in the groove; Described the second junction is a groove, is connected with the second cavity, and is provided with internal thread in the groove.Its effect is the connection of being convenient between each parts.
Further, described draw-out device one end is provided with external screw thread, is threaded connection between the first junction of this end and extracting tube; Described injection device one end is provided with external screw thread, is threaded connection between the second junction of this end and extracting tube.Its effect is the connection of being convenient between each parts.
Further, described draw-out device and extracting tube connectivity part are provided with seal.Its effect is so that the connection between two parts is tightr, is difficult for occuring leakage during use.
Further, described injection device and extracting tube connectivity part are provided with seal.Its effect is so that the connection between two parts is tightr, is difficult for occuring leakage during use.
Further, described extracting tube outer surface is provided with two concave surfaces, and these two concave surfaces are symmetrical arranged about the axis of extracting tube.When being convenient operation, its effect fixes extracting tube.
Further, described draw-out device also comprises piston, piston rod and pushing block, and piston is fixed in piston rod one end, and the piston rod other end is connected with pushing block, piston and injection-tube the first through-hole wall close contact and can slide in the first through hole, described pushing block is provided with a fixing hole.
A kind of solid phase micro-extraction method may further comprise the steps:
(1) preparation: extracting tube is filled full with fiber material;
(2) extraction: by draw-out device and injection device sample solution is extracted to extracting tube, and repeatedly aspirate repeatedly;
(3) purify: by draw-out device and injection device with air extraction to extracting tube, and suction is repeatedly repeatedly;
(4) desorb: by draw-out device and injection device stripping liquid is extracted to extracting tube, again stripping liquid is all arranged
In a container;
(5) clean: by draw-out device and injection device cleaning fluid is extracted to extracting tube, again cleaning fluid is all arranged
Go out, and repeatedly aspirate repeatedly; Again by draw-out device and injection device with air extraction to extracting tube, again air is all discharged, and suction is repeatedly repeatedly.
Further, described draw-out device also comprises piston, piston rod and pushing block, piston is fixed in piston rod one end, the piston rod other end is connected with pushing block, piston and injection-tube the first through-hole wall close contact and can in the first through hole, slide, described pushing block is provided with a fixing hole, and described method is further comprising the steps:
The location: before step (2) is implemented, by fixing hole device is fixed on can the automatic sampler of automation mechanized operation on;
Off normal: implement install after complete and automatic sampler is separated in step (5).
Further, in the described solid phase micro-extraction method step (2), the suction number of times is 20 ~ 40 times, and each draw volume is 0 ~ 1000 μ L, and each pumping velocity is 0 ~ 5000 μ L/min.
Further, in the described solid phase micro-extraction method step (3), the suction number of times is 1 ~ 3 time, and each pumping velocity is 0 ~ 4000 μ L/min.
Further, in the described solid phase micro-extraction method step (4), suction stripping liquid volume is 100 ~ 500 μ L, and pumping velocity is 0 ~ 2000 μ L/min; When discharging stripping liquid, the velocity of discharge is 0 ~ 4000 μ L/min.
Further, in the described solid phase micro-extraction method step (5), suck purge liquid number of times is 10 ~ 30 times, and each volume is 0 ~ 1000 μ L, and pumping velocity is 0 ~ 5000 μ L/min; Suction air number of times is 10 ~ 30 times, and pumping velocity is 0 ~ 10000 μ L/min.
The invention has the advantages that:
(1) need not to use expensive extracting fiber head, can use under the normal pressure, reduce cost, and simple in structure, easy to use;
(2) because apparatus structure is integrated, and inner dead volume is little, desorbed solution is high by the concentration behind the fiber material, and easily accurate quantitative analysis need not to pass through concentration step again, has reduced extraction step, has improved operating efficiency;
(3) because the interior integrally of extracting tube, with respect to other extracting tubes that is formed by a plurality of assemblies such as extraction columns, the extracting tube of this device can leakage in when extraction, and after integrated, removed the part assembly, the size of extracting tube internal cavities is relatively large, and internal pressure is less during extraction, available flow velocity is larger, so the permeability of extracting substance is better;
(4) can automation mechanized operation, improved operating efficiency.
Description of drawings
Fig. 1 is the structure explosive view of solid-phase micro-extracting device of the present invention;
Fig. 2 is the structural representation of solid-phase micro-extracting device of the present invention;
Fig. 3 is the B-B generalized section of Fig. 2;
Fig. 4 is the partial enlarged drawing of Fig. 3;
Fig. 5 is (B) chromatogram behind 10.0 μ g/L BaP aqueous solution direct injected (A) and the process SPME column extracting;
Fig. 6 is mark-on (A) not and mark-on 0.1 μ g/L (B) pork sample chromatogram figure;
Fig. 7 is mark-on (A) not and mark-on 1.0 μ g/L (B) pork sample chromatogram figure.
As follows shown in the mark among the figure:
1, injection-tube; 101, the first through hole; 102, first interface; 2, extracting tube; 201, the first cavity; 202, the second cavity; 301, the first junction; 302, the second junction 4, sealing gasket; 401, the second through hole; 5, needle stand; 501, third through-hole; 6, syringe needle; 7, pushing block; 701, fixing hole; 8, piston rod; 9, piston; 10, concave surface.
The specific embodiment
This specific embodiment is described further in connection with accompanying drawing.
Embodiment 1:
A kind of fiber material, described material is the polymer that obtains by behind methacrylic acid, GDMA, azodiisobutyronitrile and the methyl alcohol polymerization reaction take place, and its pre-polymerization fluid component proportioning is as follows: methacrylic acid: GDMA is the 1:1(mol ratio); (methacrylic acid+GDMA): methyl alcohol is the 1:5(mol ratio); The content of azodiisobutyronitrile is the 1%(mass ratio of total amount of material).
A kind of preparation method of fiber material, methacrylic acid, GDMA, azodiisobutyronitrile and methyl alcohol are mixed into pre-polymerization liquid by proportioning, pre-polymerization liquid is processed afterreaction through ultrasonic wave, methyl alcohol is passed in the reacted pre-polymerization liquid again and remove unreacted reagent, obtain the material for extraction.Wherein ultrasonic power is 40W, and the reaction condition of pre-polymerization liquid is at 40 ℃ of lower reaction 1h.
As shown in Figure 1, 2, 3, a kind of solid-phase micro-extracting device comprises pushing block 7, piston rod 8, piston 9, injection-tube 1, extracting tube 2, sealing gasket 4, needle stand 5 and syringe needle 6.Extracting tube 2 outer surfaces are provided with two concave surfaces 10.The affixed piston 9 of piston rod 8 one ends, the affixed pushing block 7 of the other end, pushing block 7 is provided with fixing hole 701; Injection-tube 1, sealing gasket 4 and needle stand 5 longitudinally are respectively equipped with the first through hole 101, the second through hole 401 and third through-hole 501; Injection-tube 1 is for being provided with the cylinder of the first through hole 101, and an end is provided with first interface 102, and first interface 102 places are provided with external screw thread; Extracting tube 2 is for being provided with the cylinder of the first cavity 201 and the second cavity 202, and two ends respectively are provided with groove as the first junction 301 and the second junction 302, what link to each other with the first cavity 201 is the first junction 301, the first junction 301 is provided with internal thread, realizes being spirally connected by first interface 102 and the first junction 301 between injection-tube 1 and the extracting tube 2; What link to each other with the second cavity 202 is that 302, the second junctions 302, the second junction are provided with internal thread, with needle stand 5 bolts.Have one to be the third through-hole 501 of inverted "convex" shape in the needle stand 5, be divided into large diameter part and little inner-diameter portion whose, the large diameter that extracting tube 2 lower ends and sealing gasket 4 all are socketed in third through-hole 501 partly in, and with third through-hole 501 inwall close contacts; Little inner-diameter portion whose is connected with syringe needle 6.
A kind of solid phase micro-extraction method may further comprise the steps:
(1) preparation: extracting tube is filled full with fiber material;
(2) extraction: piston 9 is pushed in the injection-tube 1 so that between piston 9 and the first through hole 101 inwalls for closely slipping, pushing block 7 is positioned at outside the injection-tube 1, can realize pumping liquid; Syringe needle 6 is inserted again and be equipped with in the sample bottle of sample solution, by pull piston 9 in injection-tube 1, so that device is injected suction 40 times repeatedly, each draw volume is 500 μ L, and pumping velocity is 2000 μ L/min;
(3) purify: the syringe needle 6 of described device is moved in the sky sample bottle, and injection suction air is 5 times repeatedly, and pumping velocity is 4000 μ L/min;
(4) desorb: the syringe needle 6 of described device is moved in the sample bottle that stripping liquid is housed, aspirate stripping liquid once, draw volume is 500 μ L, and pumping velocity is 1000 μ L/min; The syringe needle 6 of described device moves in the liquid phase bottle again, gets stripping liquid, and the speed of getting is 2000 μ L/min; Wherein the liquid phase bottle refers to be specifically designed to the sample bottle that chromatography is used, and volume is generally about 2 mL, uses when being used for the chromatographic apparatus sample introduction;
(5) clean: the syringe needle 6 of described device is moved in the sample bottle that cleaning fluid is housed, suction injection 500 μ L totally 10 times repeatedly, pumping velocity is 2000 μ L/min, syringe needle 6 with described device moves in the sky sample bottle again, injection suction air is 10 times repeatedly, and pumping velocity is 4000 μ L/min.
What Fig. 5 ~ Fig. 7 illustrated is material preparation method and the solid phase micro-extraction method that provides by embodiment 1, the object BaP is carried out the mensuration of BaP in effect of extracting comparison and the actual sample pork.Fig. 5 is (B) chromatogram behind 10.0 μ g/L BaP aqueous solution direct injected (A) and the process SPME column extracting, and this figure shows that through the peak area behind the SPME column extracting be more than 10 times of peak area that direct injected obtains.Fig. 6 is mark-on (A) not and mark-on 0.1 μ g/L (B) pork sample chromatogram figure; Fig. 7 is mark-on (A) not and mark-on 1.0 μ g/L (B) pork sample chromatogram figure, and Fig. 6 and Fig. 7 represent that solid phase micro-extraction method can well process the pork sample substrate; And obtain good concentration effect.
The above only is preferred embodiment of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (9)
1. a solid-phase micro-extracting device is characterized in that, comprises draw-out device, injection device and an extracting tube;
The first cavity and the second cavity on same axis are arranged in the described extracting tube, and the internal diameter of the first cavity is greater than the second cavity;
The first end of described the first cavity is connected with the external world by one first perforate;
The first end of described the second cavity is connected with the external world by one second perforate;
The second end of two cavitys is oppositely arranged, and is connected by one the 3rd perforate;
Described draw-out device comprises an injection-tube, and injection-tube axially is provided with the first through hole;
The first end Joint of described draw-out device one end and extracting tube the first cavity, and the first through hole is connected with the first cavity;
Described injection device comprises a needle stand, and needle ingot shaft upwards is provided with third through-hole;
The first end Joint of described injection device one end and extracting tube the second cavity, and third through-hole is connected with the second cavity.
2. solid-phase micro-extracting device according to claim 1 is characterized in that, described extracting tube also comprises the first junction and the second junction;
Described the first junction is a groove, is connected with the first cavity, and is provided with internal thread in the groove;
Described the second junction is a groove, is connected with the second cavity, and is provided with internal thread in the groove.
3. solid-phase micro-extracting device according to claim 2 is characterized in that,
Described draw-out device one end is provided with external screw thread, is threaded connection between the first junction of this end and extracting tube;
Described injection device one end is provided with external screw thread, is threaded connection between the second junction of this end and extracting tube.
4. solid-phase micro-extracting device according to claim 1 is characterized in that, described draw-out device and extracting tube connectivity part are provided with seal.
5. solid-phase micro-extracting device according to claim 1 is characterized in that, described injection device and extracting tube connectivity part are provided with seal.
6. solid-phase micro-extracting device according to claim 1 is characterized in that, described extracting tube outer surface is provided with two concave surfaces, and these two concave surfaces are symmetrical arranged about the axis of extracting tube.
7. solid-phase micro-extracting device according to claim 1, it is characterized in that, described draw-out device also comprises piston, piston rod and pushing block, piston is fixed in piston rod one end, the piston rod other end is connected with pushing block, piston and injection-tube the first through-hole wall close contact and can slide in the first through hole, described pushing block is provided with a fixing hole.
8. a solid phase micro-extraction method adopts solid-phase micro-extracting device as claimed in claim 1, it is characterized in that, the method may further comprise the steps:
(1) preparation: extracting tube is filled full with fiber material;
(2) extraction: by draw-out device and injection device sample solution is extracted to extracting tube, and repeatedly aspirate repeatedly;
(3) purify: by draw-out device and injection device with air extraction to extracting tube, and suction is repeatedly repeatedly;
(4) desorb: by draw-out device and injection device stripping liquid is extracted to extracting tube, again stripping liquid all is discharged in the container;
(5) clean: by draw-out device and injection device cleaning fluid is extracted to extracting tube, again cleaning fluid is all discharged, and repeatedly aspirate repeatedly; Again by draw-out device and injection device with air extraction to extracting tube, again air is all discharged, and suction is repeatedly repeatedly.
9. solid phase micro-extraction method according to claim 8, it is characterized in that, described draw-out device also comprises piston, piston rod and pushing block, piston is fixed in piston rod one end, the piston rod other end is connected with pushing block, piston and injection-tube the first through-hole wall close contact and can in the first through hole, slide, described pushing block is provided with a fixing hole, and described method is further comprising the steps:
The location: before step (2) is implemented, by fixing hole device is fixed on can the automatic sampler of automation mechanized operation on;
Off normal: implement install after complete and automatic sampler is separated in step (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310281279.0A CN103316505B (en) | 2013-07-05 | 2013-07-05 | Solid-phase micro extraction device and using method of device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310281279.0A CN103316505B (en) | 2013-07-05 | 2013-07-05 | Solid-phase micro extraction device and using method of device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103316505A true CN103316505A (en) | 2013-09-25 |
| CN103316505B CN103316505B (en) | 2015-04-01 |
Family
ID=49185721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310281279.0A Active CN103316505B (en) | 2013-07-05 | 2013-07-05 | Solid-phase micro extraction device and using method of device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103316505B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104043267A (en) * | 2014-05-27 | 2014-09-17 | 中国人民解放军防化学院 | Online solid phase microextraction method of continuous conveying gas or liquid sample |
| CN106990193A (en) * | 2017-04-28 | 2017-07-28 | 广东联捷生物科技有限公司 | Solid phase extraction sample pretreating device and processing method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101180113A (en) * | 2005-05-23 | 2008-05-14 | 比肖夫分析技术与仪器有限责任公司 | Elements for separating substances by distributing between a stationary and a mobile phase, and method for the production of a separating device |
| CN101379394A (en) * | 2006-01-31 | 2009-03-04 | 马林克罗特贝克公司 | End-cap device for high efficiency disposable chromatography column |
| CN201519488U (en) * | 2009-09-29 | 2010-07-07 | 天津出入境检验检疫局动植物与食品检测中心 | Separating device |
| CN102688749A (en) * | 2012-05-04 | 2012-09-26 | 上海新拓分析仪器科技有限公司 | Extraction material and preparation method thereof, and device and extraction method used for solid-phase micro-extraction |
| CN203379635U (en) * | 2013-07-05 | 2014-01-08 | 上海新拓分析仪器科技有限公司 | Solid-phase microextraction device |
-
2013
- 2013-07-05 CN CN201310281279.0A patent/CN103316505B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101180113A (en) * | 2005-05-23 | 2008-05-14 | 比肖夫分析技术与仪器有限责任公司 | Elements for separating substances by distributing between a stationary and a mobile phase, and method for the production of a separating device |
| CN101379394A (en) * | 2006-01-31 | 2009-03-04 | 马林克罗特贝克公司 | End-cap device for high efficiency disposable chromatography column |
| CN201519488U (en) * | 2009-09-29 | 2010-07-07 | 天津出入境检验检疫局动植物与食品检测中心 | Separating device |
| CN102688749A (en) * | 2012-05-04 | 2012-09-26 | 上海新拓分析仪器科技有限公司 | Extraction material and preparation method thereof, and device and extraction method used for solid-phase micro-extraction |
| CN203379635U (en) * | 2013-07-05 | 2014-01-08 | 上海新拓分析仪器科技有限公司 | Solid-phase microextraction device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104043267A (en) * | 2014-05-27 | 2014-09-17 | 中国人民解放军防化学院 | Online solid phase microextraction method of continuous conveying gas or liquid sample |
| CN106990193A (en) * | 2017-04-28 | 2017-07-28 | 广东联捷生物科技有限公司 | Solid phase extraction sample pretreating device and processing method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103316505B (en) | 2015-04-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101513576B (en) | On-line film abstractor combined with ion chromatography | |
| CN106959349B (en) | A kind of microtrabeculae enrichment sample injection method | |
| CN203379635U (en) | Solid-phase microextraction device | |
| CN105223041A (en) | A kind of fluid sample sampler for examining sample detection soon and method | |
| CN103041613A (en) | Extractor for vibrating extraction of pesticide residue in food | |
| CN102688749B (en) | Extraction material and preparation method thereof, and device and extraction method used for solid-phase micro-extraction | |
| CN103316505B (en) | Solid-phase micro extraction device and using method of device | |
| CN100362347C (en) | Solvent quenching accelerating device online co-operated with gas phase chromatography and method thereof | |
| CN202096788U (en) | Solid-phase micro-extraction device | |
| CN202715274U (en) | Simple solid phase extraction (SPE) device | |
| CN101698519A (en) | Water organic pollutant enrichment device | |
| CN104502498B (en) | With online aerosol sample pretreating device and detection method associated with chromatography of ions | |
| CN101266229B (en) | Chromatogram bottle | |
| CN211652723U (en) | Gas chromatograph | |
| CN101261251B (en) | Chromatograph test sample bottle | |
| CN104028005B (en) | A kind of membrane extraction method of enrichment Dietary Ethyl Carbamate in Wine | |
| CN201173914Y (en) | Continuous flowing analytical reaction unit effluent test sample processing system | |
| CN203220778U (en) | Magnetic stirring rod micro-extraction device | |
| CN102841148A (en) | Switch cannula for solid- phase extraction column | |
| CN214260778U (en) | Trace chromatographic column and trace chromatographic device for peptide fragment or protein | |
| CN206583676U (en) | A kind of multichannel malleation solid-phase micro-extracting device | |
| CN201177620Y (en) | Chromatograph test sample bottle | |
| CN202141624U (en) | Switching sleeve of solid-phase extraction columns | |
| CN205056571U (en) | Wash gas chromatography capillary column's device | |
| CN203989957U (en) | Drying device is extracted in a kind of SPE |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |