CN202173809U - Solid phase micro-extraction device - Google Patents
Solid phase micro-extraction device Download PDFInfo
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- CN202173809U CN202173809U CN2011202537554U CN201120253755U CN202173809U CN 202173809 U CN202173809 U CN 202173809U CN 2011202537554 U CN2011202537554 U CN 2011202537554U CN 201120253755 U CN201120253755 U CN 201120253755U CN 202173809 U CN202173809 U CN 202173809U
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Abstract
The utility model discloses a solid phase micro-extraction device, which comprises a needle tube, a hollow pull rod and a guide connecting bar. The needle tube is provided with a hollow cavity, the hollow pull rod is provided with a head end, a tail end and a hollow hole penetrating through the head end and the tail end, the tail end of the hollow pull rod is axially and slidably connected into the hollow cavity of the needle tube, the guide connecting bar is arranged in the hollow hole of the hollow pull rod and provided with a first end and a second end, the first end is connected together with the head end of the hollow pull rod, an extraction coating is arranged outside the second end, and a guide tube is sleeved outside the guide connecting bar and connected with the hollow cavity of the needle tube slidably and adaptively. By the aid of the additional guide tube, the problem of scratching of the coating is solved, the use frequency of an extraction head is further increased, preparation cost is low, and materials used by the device are easy to be obtained both at home and abroad and are low in cost.
Description
Technical field
The utility model relates to a kind of solid-phase micro-extracting device.
Background technology
Present commercial SPME device is made up of handle and extracting head two parts.Extracting head is made up of a cated solid-phase micro-extraction fibre in surface and stainless steel needle tubing.Micro-extraction fabric is fixed on the stainless piston, and the stainless steel needle tubing that internal diameter of overcoat is bigger is in order to the extracting fiber of protection the inside.Through the downward promotion of handle and upwards promotion, the coating turnover needle tubing on the control fiber.When coating was exposed in the sample, coating is the adsorption/absorption object from liquid (gaseous state) matrix, a certain amount of object that made on the coating enrichment.After extraction is accomplished, coating is withdrawn in the needle tubing, and object is carried out analyzing and testing with gas chromatograph or liquid chromatograph.
The promotion that the appearance of commercialization solid-phase micro-extracting device is strong the development of solid phase micro-extraction technique, but the commercialization solid-phase micro-extracting device costs an arm and a leg, and has limited the practical application of solid phase micro-extraction technique greatly.In order to reduce use cost, the researcher has developed simple and easy, preliminary solution the problem of solid-phase micro-extracting device selling at exorbitant prices.But, the self-control solid-phase micro-extracting device part that also comes with some shortcomings at present.Self-control solid-phase micro-extraction fibre substrate commonly used mainly contains quartzy and these two kinds of materials of stainless steel fibre.Because the quartz glass fibre mechanical stability is bad, fractures easily, has seldom used.Though stainless steel fibre mechanical stability and heat endurance are all fine, its linearity is relatively poor, and degree of crook was bigger when length was longer.The coating that with the stainless steel fibre is substrate comes in contact with the tube wall of syringe needle because stainless steel fibre is crooked through regular meeting.When releasing or drawing back coating, can come off because of scraping with the coating of syringe needle tube wall contact portion.These deficiencies of present self-control solid-phase micro-extracting device make coating short partially service life, have limited the popularization of self-control solid-phase micro-extracting device in practical application.
The utility model content
The utility model provides a kind of and can effectively avoid making by oneself coating and swiped, improve the self-control coating solid-phase micro-extracting device in service life; It is higher that it has overcome in the background technology existing commodity solid-phase micro-extracting device price; Can't promote on a large scale; Self-control solid-phase micro-extracting device coating is often swiped, coating short partially deficiency in service life.
The technical scheme that is adopted that the utility model solves its technical problem is:
A kind of solid-phase micro-extracting device is characterized in that: it comprises:
One needle tubing, it has cavity;
One hollow draw-bar, it has the hollow hole of a head end, a tail end and consistent penetrator end and tail end, and said hollow draw-bar tail end is slidingly connected in the needle-inserting tube cavity vertically; And
One connects bar, and it is located in the hollow draw-bar hollow hole and has first end and second end, and said first end and hollow draw-bar head end link together; Said second end peripheral hardware extraction coating; And, the said outer socket guiding tube of bar, the adaptive needle tubing cavity that is slidingly connected of said guiding tube of connecting.
Among one preferred embodiment: said needle tubing comprises syringe that axially runs through and the syringe needle that axially is fixed together, and said syringe internal diameter is greater than the syringe needle internal diameter; Said guiding tube is adaptive to be slidingly connected in the syringe needle endoporus.
Among one preferred embodiment: saidly connect bar first end and the hollow draw-bar head end links together through nut.
Among one preferred embodiment: establish sealing ring in the said syringe, said sealing ring location abuts against syringe and syringe needle junction.
Among one preferred embodiment: the said strip adoption stainless steel fibre that connects.
Among one preferred embodiment: said needle length is at least guiding tube length and coated length sum.
Among one preferred embodiment: said guiding tube adopts stainless steel, saidly connects bar and guiding tube bonds together through high-temperature adhesives.
The present technique scheme is compared with background technology, and it has following advantage:
1, through increasing guiding tube; The problem of effectively avoiding coating to be swiped; Further improved the access times of extraction, preparation cost is low, installs all acquisitions and cheap easily at home and abroad of used material; And simple in structure, preparation convenience, favorable reproducibility, long service life, be easy to promote the use of.
2, establish sealing ring in the syringe, not only play sealing function, and can also stop that guiding tube gets into syringe, realize position-limiting action, thus avoid coating drew back dark come in contact with syringe and swiped come off, improved the service life of coating.
3, be coated carrier with stainless steel matrix, improved the mechanical strength that connects bar greatly, improved the access times of extracting head.
4, preparation is simple, need not special process equipment, is easy to produce in batches.
5, easy to operate, be easy to carry, help applying of solid phase micro-extraction technique.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is described further.
Fig. 1 has illustrated the structural representation of the solid-phase micro-extracting device of a preferred embodiment.
The solid-phase micro-extracting device that Fig. 2 has illustrated a preferred embodiment is in the structural representation of coating retracted state.
The specific embodiment
Please refer to Fig. 1 to Fig. 2, a kind of solid-phase micro-extracting device, it comprises that a needle tubing 10, a hollow draw-bar 23, connect bar 22, an extraction coating 25 and a guiding tube 24.
Said hollow draw-bar 23 has the hollow hole of a head end, a tail end and consistent penetrator end and tail end, and said hollow draw-bar 23 tail ends are slidingly connected in the needle-inserting tube cavity vertically, make said hollow draw-bar 23 relatively needle tubing slide vertically.The said bar 22 that connects is located in hollow draw-bar 23 hollow holes and has first end and second end; Said first end and hollow draw-bar 23 head ends link together through nut 21; Said extraction coating 25 is located at and connects outside bar 22 second ends; And said guiding tube 24 sockets connect outside the bar 22, adaptive needle tubing 10 cavities that are slidingly connected.Among the present embodiment, stretch out on the part that connects bar 22 outside the guiding tube 24 and all establish coating 25.Among the present embodiment, said nut 21 is fixed in hollow draw-bar 23 head ends through screw thread, and said bar 22 first ends that connect are through affixed nuts of mode such as welding or grafting.
Said needle tubing 10 comprises the syringe that axially runs through 11 and syringe needle 12 that axially is fixed together, and syringe 11 internal diameters are greater than syringe needle 12 internal diameters, and syringe needle 12 length are at least guiding tube 24 length and extraction coating 25 length sums.Among the present embodiment, between said syringe 11 and the syringe needle 12 through thread spindle to being fixed together.Best; Also be equiped with a sealing ring 13 in syringe 11 and syringe needle 12 junctions, guiding tube 24 adaptive being slidingly connected in syringe needle 12 endoporus make: when extraction coating 25 is drawn back; Guiding tube 24 tops are against sealing ring 13 places; Realize pumpback extreme position location, extraction coating 25 is placed in the syringe needle 12 fully, avoid extracting coating 25 by syringe needle or syringe scraping; When extraction coating 25 was extended, the pull bar top was against sealing ring 13 places, realized stretching out the extreme position location.
Among the present embodiment, the said bar material that connects is selected stainless steel fibre for use, and said guiding tube material is selected stainless steel for use, and said connecting between bar and the guiding tube bonds together through high-temperature adhesives.Among the present embodiment, said needle tubing material is selected stainless steel for use.
During extraction, promote nut 21 to contacting with syringe 11, make extraction coating 25 and part guiding tube 24 extended needles 12, extraction coating 25 is exposed in the sample, and the length that each coating 25 is stretched out is consistent; After extraction is accomplished; Draw back nut 21 so that guiding tube 24 tops are against sealing ring 13; Promptly guaranteeing to extract coating 25 all places in the syringe needle 12; Because guiding tube 24 is fixedly arranged on extraction coating 25 upper ends, make extraction coating 25 be in syringe needle 12 centers all the time, to avoid coating 25 directly to contact and to be swiped by syringe with syringe.
Among the present embodiment; Connect that bar 22 length are preferably 16～18cm, diameter is preferably 0.1～0.2mm; Guiding tube 24 length are preferably 1～1.5mm, and said syringe needle 12 external diameters are preferably that 0.6～0.8mm, internal diameter are preferably 0.4～0.6mm, length is preferably 3.0～4.0cm, and said extraction coating 25 is a polymer coating; Its length is preferably 1～1.5cm, thickness is preferably 5～100um; So that this extraction equipment is in optimum size, can extract required sample to greatest extent, the service life of improving this device simultaneously.
The above; Be merely the utility model preferred embodiment; So can not limit the scope that the utility model is implemented according to this, the equivalence of promptly doing according to the utility model claim and description changes and modifies, and all should still belong in the scope that the utility model contains.
Claims (7)
1. solid-phase micro-extracting device, it is characterized in that: it comprises:
One needle tubing, it has cavity;
One hollow draw-bar, it has the hollow hole of a head end, a tail end and consistent penetrator end and tail end, and said hollow draw-bar tail end is slidingly connected in the needle-inserting tube cavity vertically; And
One connects bar, and it is located in the hollow draw-bar hollow hole and has first end and second end, and said first end and hollow draw-bar head end link together; Said second end peripheral hardware extraction coating; And, the said outer socket guiding tube of bar, the adaptive needle tubing cavity that is slidingly connected of said guiding tube of connecting.
2. a kind of solid-phase micro-extracting device according to claim 1 is characterized in that: said needle tubing comprises syringe that axially runs through and the syringe needle that axially is fixed together, and said syringe internal diameter is greater than the syringe needle internal diameter; Said guiding tube is adaptive to be slidingly connected in the syringe needle endoporus.
3. a kind of solid-phase micro-extracting device according to claim 2 is characterized in that: saidly connect bar first end and the hollow draw-bar head end links together through nut.
4. a kind of solid-phase micro-extracting device according to claim 2 is characterized in that: establish sealing ring in the said syringe, said sealing ring location abuts against syringe and syringe needle junction.
5. a kind of solid-phase micro-extracting device according to claim 2 is characterized in that: the said strip adoption stainless steel fibre that connects.
6. a kind of solid-phase micro-extracting device according to claim 2 is characterized in that: said needle length is at least guiding tube length and coated length sum.
7. a kind of solid-phase micro-extracting device according to claim 2 is characterized in that: said guiding tube adopts stainless steel, saidly connects bar and guiding tube bonds together through high-temperature adhesives.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202537554U CN202173809U (en) | 2011-07-18 | 2011-07-18 | Solid phase micro-extraction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202537554U CN202173809U (en) | 2011-07-18 | 2011-07-18 | Solid phase micro-extraction device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202173809U true CN202173809U (en) | 2012-03-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202537554U Expired - Lifetime CN202173809U (en) | 2011-07-18 | 2011-07-18 | Solid phase micro-extraction device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202173809U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102847525A (en) * | 2012-09-21 | 2013-01-02 | 厦门大学 | Extraction head for solid phase micro-extraction, and preparation method and applications of extraction head |
| CN102847524A (en) * | 2012-09-21 | 2013-01-02 | 厦门大学 | Solid phase microextraction extraction head for acrylamide detection and preparation method and application thereof |
| WO2018192447A1 (en) * | 2017-04-17 | 2018-10-25 | 武汉大学 | Method for micro-column enrichment sample injection |
-
2011
- 2011-07-18 CN CN2011202537554U patent/CN202173809U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102847525A (en) * | 2012-09-21 | 2013-01-02 | 厦门大学 | Extraction head for solid phase micro-extraction, and preparation method and applications of extraction head |
| CN102847524A (en) * | 2012-09-21 | 2013-01-02 | 厦门大学 | Solid phase microextraction extraction head for acrylamide detection and preparation method and application thereof |
| WO2018192447A1 (en) * | 2017-04-17 | 2018-10-25 | 武汉大学 | Method for micro-column enrichment sample injection |
| US11287401B2 (en) | 2017-04-17 | 2022-03-29 | Wuhan Spenrich Technologies Co., Ltd | Sample pretreatment method of microextraction tube injection |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120328 |
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| CX01 | Expiry of patent term |