CN208459118U - Solid-phase micro-extracting device - Google Patents

Abstract

The utility model provides a kind of solid-phase micro-extracting device, is related to the technical field of analytical chemistry sample pre-treatments, including sampled part and extraction component, sampled part include injection port, syringe and piston matched with syringe, piston exterior connects pull-push piece.The solid-phase micro-extracting device injection port enters sample to be detected, and by the way that pull-push piece to be displaced outwardly, band piston is displaced outwardly, and forms pull of vacuum in syringe and sucks sample to be detected inside syringe by injection port, realizes sampling.Extract the extraction silk that component includes protection sleeve pipe and is set to inside protection sleeve pipe; one end of protection sleeve pipe is run through and is fixedly connected on piston; the other end sealed set of protection sleeve pipe, the micro-extraction probe for extracting silk can be moved axially and be entered along protection sleeve pipe in the space that syringe and piston are formed.After sampling successfully in sampled part, the extraction silk in protection sleeve pipe is pushed, micro-extraction probe is exposed to outside protection sleeve pipe and enters sample to be detected, realize solid phase microextraction.

Description

Solid-phase micro-extracting device

Technical field

The utility model relates to analytical chemistry Sample Pretreatment Technique fields, fill more particularly, to a kind of solid phase microextraction It sets.

Background technique

Environmental pollution states increasingly aggravate now, jeopardize the health of the mankind, therefore to the prison of Environmental Trace pollutant Survey seems particularly significant.But the type of atmosphere, water body and pollutant in soil is too many and content is very low, usually μ g/L, ng/L The order of magnitude, be difficult to detect using common detecting methods, and be difficult directly to separate the contaminant component in matrix.Tradition Separation method it is more usually using organic solvent, the processing time is long, it is complex for operation step, be easy to make volatile components to lose, mistake Difference is larger, and the use of organic solvent also pollutes the environment.Solid phase microextraction (Solid Phase Microextraction, SPME) technology be used for sample pre-treatments, integrate extraction, concentration, desorption, sample introduction, the technology based on Solid Phase Extraction, Not only retain its whole advantage, has more abandoned and needed using column packing and the disadvantage desorbed with organic solvent.Therefore solid phase Monitoring of the micro-extraction technique for environment is very convenient.

At present, on the one hand, commercialized SPME extraction probe is expensive, and due to extraction probe extracting power decline After cannot replace, cause entire instrument to be scrapped, can not reuse；On the other hand, detection operation is relatively complicated, needs to contain inspection The container of sample, while SPME extraction probe being fixed, it is just able to achieve probe and is extracted in test sample.

Utility model content

The purpose of this utility model is to provide a kind of solid-phase micro-extracting devices, to alleviate solid phase microextraction in the prior art When need be additionally provided contain detection sample container and extract probe cannot reuse or cannot only replace extraction probe skill Art problem.

The utility model provides a kind of solid-phase micro-extracting device, comprising:

Sampled part, the sampled part include injection port, syringe and piston matched with the syringe, outside the piston Portion connects pull-push piece, and,

Extract component, the extraction silk that the extraction component includes protection sleeve pipe and is set to inside the protection sleeve pipe, institute Run through and be fixedly connected on the piston, the other end sealed set of the protection sleeve pipe in the one end for stating protection sleeve pipe；The extraction It takes the micro-extraction probe of silk that can move axially along the protection sleeve pipe and enters the space that the syringe and the piston are formed It is interior.

Further, the pull-push piece be hollow cylindrical pull-push piece, the protection sleeve pipe through the pull-push piece with it is described Piston connection.

Further, the sampled part is provided with the gasket for sealing the injection port.

Further, the syringe is equipped with scale.

Further, one end of separate the micro-extraction probe of the extraction silk is located at outside the protection sleeve pipe and equipped with the One handle.

Further, the sealed end of the protection sleeve pipe is provided with second handle, the second handle connection extraction silk, institute It states second handle and the protection sleeve pipe is rotatablely connected；Extraction silk edge inside protection sleeve pipe under the action of second handle The protection sleeve pipe is axially moved.

Further, the handle is threadedly coupled with the protection sleeve pipe.

Further, elastic tube body is equipped in the middle part of the protection sleeve pipe.

Further, the extraction silk includes wire or quartz fibre.

Further, the material of the wire includes stainless steel, metal alloy or brass.

Solid-phase micro-extracting device provided by the utility model, including sampled part and extraction component, sampled part include into Sample mouth, syringe and piston matched with syringe, piston exterior connect pull-push piece.The solid-phase micro-extracting device injection port enters to be checked Test sample sheet, by the way that pull-push piece to be displaced outwardly, band piston is displaced outwardly, formed in syringe pull of vacuum by sample to be detected by Injection port sucks inside syringe, realizes sampling.The extraction silk that component includes protection sleeve pipe and is set to inside protection sleeve pipe is extracted, Piston, the other end sealed set of protection sleeve pipe are run through and be fixedly connected in one end of protection sleeve pipe, and the micro-extraction for extracting silk is visited Head can be moved axially and be entered along protection sleeve pipe in the space that syringe and piston are formed.After being sampled successfully in sampled part, The extraction silk in protection sleeve pipe is pushed, micro-extraction probe is exposed to outside protection sleeve pipe and enters sample to be detected, realizes that solid phase is micro- Extraction.The solid-phase micro-extracting device integrates sampling, extraction, concentration, desorption, sample introduction, meanwhile, the protection sleeve pipe and extraction silk It can be replaced with release unit, recycling can be realized in entire extraction equipment, and experimental cost is greatly saved.The solid phase is micro- It is simple, the easy to operate, long service life of extraction equipment production, at low cost and easy to carry.

Detailed description of the invention

It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art Under the premise of labour, it is also possible to obtain other drawings based on these drawings.

Fig. 1 is the easy structure schematic diagram of the solid-phase micro-extracting device in a kind of embodiment of the utility model；

Fig. 2 is the easy structure schematic diagram of the solid-phase micro-extracting device in the utility model another embodiment.

Icon: 1- syringe；2- piston；3- injection port；4- gasket；5- extracts silk；6- micro-extraction probe；7- protective case Pipe；8- first handle；9- pull-push piece；10- elasticity tube body；11- second handle.

Specific embodiment

The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally Field those of ordinary skill every other embodiment obtained without making creative work belongs to practical Novel protected range.

In the description of the present invention, it should be noted that such as occur term " center ", "upper", "lower", " left side ", " right side ", "vertical", "horizontal", "inner", "outside" etc., indicated by orientation or positional relationship be orientation based on the figure or Positional relationship is merely for convenience of describing the present invention and simplifying the description, rather than the device or member of indication or suggestion meaning Part must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention. In addition, such as there is term " first ", " second ", " third " are used for description purposes only, be not understood to indicate or imply opposite Importance.

In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, such as there is term " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one Connect to body；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be indirect by intermediary It is connected, can be the connection inside two elements.For the ordinary skill in the art, on being understood with concrete condition State the concrete meaning of term in the present invention.

Fig. 1 is a kind of solid-phase micro-extracting device of embodiment of the utility model.As shown in Figure 1, solid-phase micro-extracting device Including sampled part and extraction component, sampled part includes injection port 3, syringe 1 and piston 2 matched with syringe 1, outside piston 2 Portion connects pull-push piece 9；The extraction silk 5 that component includes protection sleeve pipe 7 and is set to inside protection sleeve pipe 7 is extracted, protection sleeve pipe 7 Piston 2 is run through and be fixedly connected in one end, and the micro-extraction probe 6 of the other end sealed set of protection sleeve pipe 7, extraction silk 5 can It moves axially and enters in the space that syringe 1 and piston 2 are formed along protection sleeve pipe 7.

Extract layer is coated in one end of extraction silk 5 as micro-extraction probe 6, and micro-extraction probe 6 can be along 7 axis of protection sleeve pipe To the protection for moving into realization micro-extraction probe 6 in protection sleeve pipe 7.Needle may be implemented in one end sealed set of protection sleeve pipe 7 The extraction sampling of sampled part is realized in sealing between cylinder 1 and piston 2.The solid-phase micro-extracting device injection port 3 enters to be detected Sample, by the way that pull-push piece 9 to be displaced outwardly, band piston 2 is displaced outwardly, and pull of vacuum is formed in syringe 1 by sample to be detected It is sucked inside syringe 1 by injection port 3, realizes sampling.After being sampled successfully in sampled part, since protection sleeve pipe 7 is set as passing through It wears the front end of piston 2 and is fixedly connected on piston 2, push the extraction silk 5 in protection sleeve pipe 7, micro-extraction probe 6 is made to be exposed to guarantor Protecting pipe 7 is outer and enters sample to be detected, realizes solid phase microextraction.Protection sleeve pipe 7 and extraction silk 5 can integrally be detached from the solid phase Micro-extraction device realizes that subsequent detection operates directly as sample injector.

The solid-phase micro-extracting device integrates sampling, extraction, concentration, desorption, sample introduction, meanwhile, protection sleeve pipe and extraction Silk can be detached from the solid-phase micro-extracting device, when the decline of micro-extraction probe extracting power, directly replace micro-extraction probe It changes, experimental cost is greatly saved.Simple, the easy to operate, long service life of solid-phase micro-extracting device production, it is at low cost and It is easy to carry.

In order to realize the fixation more easily operated with protection sleeve pipe 7, pull-push piece 9 is hollow cylindrical pull-push piece, protective case Pipe 7 is connect through pull-push piece 9 with piston 2.Pull-push piece 9 is set as hollow cylindrical, on the one hand, more convenient for hand-held push-and-pull, is adopting It is more time saving and energy saving when sample and abandoning sample；On the other hand, protection sleeve pipe 7 realizes both ends and fixes, and stability is more preferable, facilitates operation.

In order to realize the sealing of sampled part after sampling, gasket 4 is provided at injection port 3, when needing to sample, is removed Gasket 4 is sampled；After the completion of sampling, installation gasket 4 realizes the sealing of sampled part, prevents sample to be tested from letting out Dew.

In order to realize the accurate measurement of sample to be detected, the syringe 1 of sampled part is equipped with scale, according to different application field Scape, the capacity of sampled part can be set according to actual needs into different ranges.

In order to extend the service life of the solid-phase micro-extracting device, reducing use cost and realize recycling, protective case The material of pipe 7 is stainless steel, metal alloy or brass.

The material for extracting silk 5 can be wire or quartz fibre, and the material of wire can be stainless steel, metal alloy Or brass.

When extracting silk 5 is wire, extract layer is directly coated with the surface of wire as micro-extraction probe 6, when micro- When the extracting power decline of extraction probe 6, wire can be taken out, the extract layer on surface is removed and coats new extraction again Layer, realizes the re-using of package unit.When extracting silk 5 is quartz fibre, extract layer is applied directly to the table of quartz fibre Face is as micro-extraction probe 6, when the decline of the extracting power of micro-extraction probe 6, quartz fibre taking-up can be substituted for new Quartz fibre realizes the re-using of package unit.

With continued reference to Fig. 1, extracts silk 5 and be located at the outside of protection sleeve pipe 7 far from one end of micro-extraction probe 6 and be equipped with first Handle 8.Original state, micro-extraction probe 6 are located at the inside of protection sleeve pipe 7, the preceding end in contact of piston 2 and syringe 1.In use, The injection port 3 for removing gasket 4 is put in sample to be detected, pull-push piece 9 is pulled to be displaced outwardly, while is outside with piston 2 It is mobile, suck sample to be tested by injection port 3 in the space that syringe 1 and piston 2 are formed, it is with gasket 4 that injection port 3 is close Envelope completes sampling；First handle 8 is pushed to move forward silk 5 is extracted, micro-extraction probe 6 is exposed to the outside of protection sleeve pipe 7, And enters in sample to be detected and extracted.

In an embodiment of the utility model, as shown in Fig. 2, the sealed end of protection sleeve pipe 7 is provided with second-hand Handle 11, the connection extraction silk 5 of second handle 11, second handle 11 and protection sleeve pipe 7 are rotatablely connected, easy to disassemble, and extraction silk 5 is the It is axially moved inside protection sleeve pipe 7 along protection sleeve pipe 7 under the action of two handles 11.

Elastic tube body 10 is equipped in order to realize that micro-extraction probe 6 reaches the outside of protection sleeve pipe 7, in the middle part of protection sleeve pipe 7, when When pushing second handle 11, since the front end of protection sleeve pipe 7 and piston 2 are fixed from movement, so elastic tube body 10 is pressed Contracting, internal extraction silk 5 move forward, and realize that micro-extraction probe 6 is exposed to the outside of protection sleeve pipe 7.

When original state, micro-extraction probe 6 is located at the inside of protection sleeve pipe 7, the preceding end in contact of piston 2 and syringe 1.It uses When, the injection port 3 for removing gasket 4 is put in sample to be detected, pull pull-push piece 9 be displaced outwardly, while with piston 2 to Outer movement sucks sample to be tested by injection port 3 in the space that syringe 1 and piston 2 are formed, with gasket 4 by injection port 3 Sampling is completed in sealing；Since the front end of protection sleeve pipe 7 and piston 2 are fixed from movement, so when pushing second handle 11, bullet Property tube body 10 start to compress, internal extraction silk 5 moves forward, realize micro-extraction probe 6 be exposed to the outside of protection sleeve pipe 7 into Enter in the sample to be tested in syringe 1, extraction work can be carried out.

In order to facilitate the disassembly replacement of extraction silk 5, the rotation connection mode of second handle 11 and protection sleeve pipe 7 is screw thread company It connects.When the decline of the extracting power of micro-extraction probe 6, second handle 11 is disassembled from protection sleeve pipe 7, while extracting band out There is the extraction silk 5 of micro-extraction probe 6 to be replaced.

Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the utility model, rather than it is limited System；Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should Understand: it is still possible to modify the technical solutions described in the foregoing embodiments, or to some or all of Technical characteristic is equivalently replaced；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution, and this is practical new The range of each embodiment technical solution of type.

Claims (10)

1. a kind of solid-phase micro-extracting device characterized by comprising

Sampled part, the sampled part include injection port, syringe and piston matched with the syringe, and the piston exterior connects Pull-push piece is connect, and,

Extract component, the extraction silk that the extraction component includes protection sleeve pipe and is set to inside the protection sleeve pipe, the guarantor Run through and be fixedly connected on the piston, the other end sealed set of the protection sleeve pipe in one end of protecting pipe；The extraction silk Micro-extraction probe can move axially and enter in the space that the syringe and the piston are formed along the protection sleeve pipe.

2. solid-phase micro-extracting device according to claim 1, which is characterized in that the pull-push piece is hollow cylindrical push-and-pull Part, the protection sleeve pipe are connect through the pull-push piece with the piston.

3. solid-phase micro-extracting device according to claim 1 or 2, which is characterized in that the sampled part, which is provided with, to be used for Seal the gasket of the injection port.

4. solid-phase micro-extracting device according to claim 1 or 2, which is characterized in that the syringe is equipped with scale.

5. solid-phase micro-extracting device according to claim 1, which is characterized in that the separate micro-extraction probe of the extraction silk One end be located at outside the protection sleeve pipe and be equipped with first handle.

6. solid-phase micro-extracting device according to claim 1, which is characterized in that the sealed end of the protection sleeve pipe is provided with Second handle, the second handle connection extraction silk, the second handle and the protection sleeve pipe are rotatablely connected；The extraction silk It is axially moved inside protection sleeve pipe along the protection sleeve pipe under the action of second handle.

7. solid-phase micro-extracting device according to claim 6, which is characterized in that the handle and the protection sleeve pipe screw thread Connection.

8. solid-phase micro-extracting device according to claim 7, which is characterized in that be equipped with elastic tube in the middle part of the protection sleeve pipe Body.

9. solid-phase micro-extracting device according to claim 1, which is characterized in that the extraction silk includes wire or quartz Fiber.

10. solid-phase micro-extracting device according to claim 9, which is characterized in that the material of the wire includes stainless Steel, metal alloy or brass.