CN214277631U

CN214277631U - Solid phase micro-extraction auxiliary device

Info

Publication number: CN214277631U
Application number: CN202022935620.8U
Authority: CN
Inventors: 周晨晨; 谭瑞楠; 张往祥
Original assignee: Nanjing Forestry University
Current assignee: Nanjing Forestry University
Priority date: 2020-12-09
Filing date: 2020-12-09
Publication date: 2021-09-24
Anticipated expiration: 2030-12-09

Abstract

The utility model discloses a solid phase micro-extraction auxiliary device, which belongs to the technical field of the pretreatment of analytical chemical samples and mainly comprises a hollow fixed handle cylinder, a tripod fixed disk and supporting legs; a through hole is formed in the middle of the tripod fixing disc, the hollow fixing handle cylinder is arranged in the through hole, a small hole is formed in the bottom of the hollow fixing handle cylinder, the SPME handle is inserted into the hollow cylinder, and the extraction head penetrates through the small hole; the supporting leg has threely, and circumference evenly is fixed in tripod fixed disk lower part and adjustable opening angle. The utility model can effectively fix the SPME handle, and the handle is elevated, thereby liberating both hands and preventing the extraction head from being broken; the handle is convenient to be vertically inserted into the sample; the levelness of the device is observed by using the level bubble, so that the levelness of the device is adjusted, and the whole device is simple in structure, convenient to carry, simple to assemble and disassemble and easy to operate; the height of the hollow fixed handle barrel can be adjusted according to sample bottles with different heights, and the requirements of various sample bottles are met.

Description

Solid phase micro-extraction auxiliary device

Technical Field

The utility model belongs to the technical field of the preceding processing of analytical chemistry sample, concretely relates to solid phase micro-extraction auxiliary device.

Background

The solid phase micro-extraction overcomes the defects of the traditional sample pretreatment technology, integrates sampling, extraction, concentration and sample introduction, and greatly accelerates the speed of analysis and detection. The obvious technical advantages are generally concerned by analysts in the industries of environment, food and medicine, and are widely popularized and applied.

The solid phase micro-extraction technology is based on the adsorption and enrichment of a substance to be detected in a sample by using fused quartz fiber coated with a stationary phase. The method is characterized in that the analyte can be concentrated while extraction is carried out. The method is characterized in that fused quartz optical fiber or other materials are used as a substrate support, the characteristics of 'similar compatibility' are adopted, polymer stationary phase thin layers with different properties are coated on the surface of the fused quartz optical fiber or other materials, and the object to be detected is extracted, enriched, sample-fed and analyzed in a direct or headspace mode. The fiber enriched with the analyte is then transferred directly to an instrument (GC or HPLC) and desorbed in some manner (typically thermal desorption, or solvent desorption) before separation and analysis.

Solid phase microextraction requires that the SPME extraction head be installed in the SPME handle before the experiment is performed. However, the extraction head is made of a quartz fiber and is very fragile, the extraction head is usually required to be kept in a sample bottle for more than half an hour in an experiment, the extraction head can be broken by accident, and the extraction head is expensive, so that a stable fixing device is required to replace two hands of a person to fix the SPME handle.

Disclosure of Invention

The utility model provides a technical problem: the SPME handle is difficult to fix in the solid phase micro-extraction technology.

The technical scheme is as follows: in order to solve the technical problem, the utility model discloses a technical scheme as follows:

a solid phase micro-extraction auxiliary device comprises a hollow fixed handle cylinder, a tripod fixed disc and supporting legs; a through hole is formed in the middle of the tripod fixing disc, the hollow fixed handle cylinder is arranged in the through hole, a small hole is formed in the bottom of the hollow fixed handle cylinder, the SPME handle is inserted into the hollow fixed handle cylinder, and the extraction head penetrates through the small hole; the supporting legs have three, and circumference evenly is fixed in tripod fixed disk lower part.

Furthermore, a horizontal threaded hole is formed in the circumferential surface of the tripod fixing disc in the direction of the circle center, a fixing screw is arranged in the threaded hole, and the hollow fixing handle cylinder is fixed in a through hole in the middle of the tripod fixing disc through the fixing screw.

Further, the through-hole in the middle of the tripod fixed disk is a threaded hole, the outer surface of the corresponding hollow fixed handle cylinder is provided with an external thread, and the hollow fixed handle cylinder is in threaded connection with the threaded hole.

Furthermore, the upper end of the hollow fixed handle barrel is provided with an anti-slip convex edge.

Furthermore, the bottom of the supporting leg is provided with a non-slip mat.

Furthermore, the supporting legs are welded on the lower portion of the tripod fixing disc and fixedly connected with the lower portion of the tripod fixing disc.

Furthermore, the supporting legs are detachably connected with the tripod fixing disc; the lower part of the tripod fixing disc is provided with two U-shaped flanges, threaded holes are formed in the flanges, two sides of the upper end of the supporting leg are of a planar structure, and the thickness of the supporting leg is slightly smaller than the distance between the two flanges; the upper end plane of the supporting leg is provided with a threaded through hole, and the upper end of the supporting leg is embedded between the two flanges and is fixedly connected through a bolt and nut combination.

Further, a leveling bubble is arranged on the circumferential surface of the tripod fixed disk.

Has the advantages that: compared with the prior art, the utility model has the advantages of it is following:

1. the SPME handle can be effectively fixed, the handle is raised, two hands are liberated, and the extraction head is prevented from being broken;

2. the levelness of the device can be observed by utilizing the level bubble, so that the levelness of the device is adjusted, and the SPME handle can be conveniently and vertically inserted into a sample.

3. The whole device is simple in structure, convenient to carry, simple to assemble and disassemble and easy to operate.

4. The height of the hollow fixed handle barrel can be adjusted according to sample bottles with different heights, and the requirements of various sample bottles are met.

5. The adjustable angle that opens of supporting leg is and fixed through bolt and nut tightening, is convenient for accomodate, prevents that it from rocking.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the structure of FIG. 1;

FIG. 3 is a cross-sectional view of FIG. 2;

fig. 4 is an enlarged view of a portion of the structure at B in fig. 1.

Detailed Description

The present invention will be further illustrated by the following specific examples, which are carried out on the premise of the technical scheme of the present invention, and it should be understood that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1-3, the solid phase micro-extraction auxiliary device of the present application comprises a hollow fixed handle cylinder 1, a tripod fixed disk 3 and supporting legs 4; set up the through-hole in the middle of the tripod fixed disk 3, the fixed handle section of thick bamboo of cavity 1 sets up in the through-hole, and the bottom of the fixed handle section of thick bamboo of cavity 1 is equipped with aperture 13, and the SPME handle inserts in the fixed handle section of thick bamboo of cavity 1 and the extraction head passes from aperture 13, the analysis of being convenient for advance the appearance.

The fixing method of the hollow fixed handle tube 1 in the middle through hole of the tripod fixed disc 3 includes but is not limited to the following methods: 1. the horizontal threaded hole is formed in the circumferential surface of the tripod fixing disc 3 in the direction towards the circle center, the fixing screw 6 is arranged in the threaded hole, the fixing screw 6 can be screwed in to fix the hollow fixing handle barrel 1, and the hollow fixing handle barrel 1 can slide up and down to adjust the height of the SPME handle after being screwed out, so that the heights of the SPME handle are adjusted, and sampling bottles with different heights are met. 2. The through-hole in the middle of the tripod fixed disk 3 is a threaded hole, the outer surface of the corresponding hollow fixed handle barrel 1 is provided with an external thread, and the external thread are fixed through the thread and can adjust the height.

In addition, the anti-slip convex edge 12 is arranged at the upper end of the hollow fixed handle barrel 1 to prevent the hollow fixed handle barrel 1 from slipping, so that the protection and limiting effects are achieved.

The supporting legs 4 are three, and are circumferentially and uniformly arranged at the lower part of the tripod fixing disc 3 to form a stable triangular supporting structure. The supporting leg 4 is welded on the lower part of the tripod fixed disk 3 and is fixedly connected with the tripod fixed disk.

The supporting legs 4 are detachably connected with the tripod fixing disc 3. In order to facilitate drawing in supporting leg 4 and effectively fix supporting leg 4 and prevent that it from rocking, supporting

leg

4 and 3 connected modes of tripod fixed disk are: as shown in fig. 4, two U-shaped flanges 31 are arranged at the lower part of the tripod fixed disk 3, threaded holes are arranged on the flanges 31, two sides of the upper end of the supporting leg 4 are of a planar structure, and the thickness is slightly smaller than the distance between the two flanges 31; a threaded through hole 41 is provided at the upper end plane of the support leg 4, and the upper end of the support leg 4 is inserted between the two flanges 31 and fixedly connected by a bolt and nut combination 7. Make supporting leg 4 articulate and can freely adjust its angle of opening in 3 lower parts of tripod to adjust the height of whole device, also conveniently draw in addition, and utilize the bolt and nut combination to screw up fixedly, prevent that supporting leg 4 from rocking.

The bottom of the supporting leg 4 is provided with a non-slip mat 5 which prevents the whole device from moving. The leveling bubble 2 is arranged on the circumferential surface of the tripod fixed disk 3, so that whether the whole device is horizontal or not can be observed.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A solid phase micro-extraction auxiliary device is characterized in that: comprises a hollow fixed handle cylinder (1), a tripod fixed disc (3) and supporting legs (4); a through hole is formed in the middle of the tripod fixing disc (3), the hollow fixed handle cylinder (1) is arranged in the through hole, a small hole (13) is formed in the bottom of the hollow fixed handle cylinder (1), the SPME handle is inserted into the hollow fixed handle cylinder (1) of the hollow fixed handle cylinder, and the extraction head penetrates through the small hole (13); the number of the supporting legs (4) is three, and the supporting legs are circumferentially and uniformly fixed on the lower portion of the tripod fixing disc (3).

2. The solid phase microextraction aid of claim 1, wherein: the tripod is characterized in that a horizontal threaded hole is formed in the circumferential surface of the tripod fixing disc (3) in the direction of the circle center, a fixing screw (6) is arranged in the threaded hole, and the hollow fixing handle cylinder (1) is fixed in a through hole in the middle of the tripod fixing disc (3) through the fixing screw (6).

3. The solid phase microextraction aid of claim 1, wherein: the through hole in the middle of the tripod fixing disc (3) is a threaded hole, the outer surface of the corresponding hollow fixed handle barrel (1) is provided with an external thread, and the hollow fixed handle barrel (1) is in threaded connection with the threaded hole.

4. The solid phase microextraction aid of claim 1, wherein: the upper end of the hollow fixed handle barrel (1) is provided with an anti-slip convex edge (12).

5. The solid phase microextraction aid of claim 1, wherein: and the bottom of the supporting leg (4) is provided with an anti-skid pad (5).

6. The solid phase microextraction aid of claim 1, wherein: the supporting legs (4) are welded and fixed on the lower portion of the tripod fixing disc (3).

7. The solid phase microextraction aid of claim 5, wherein: the supporting legs (4) are detachably connected with the tripod fixing disc (3); two U-shaped flanges (31) are arranged at the lower part of the tripod fixed disc (3), threaded holes are formed in the flanges (31), two sides of the upper end of the supporting leg (4) are of a planar structure, and the thickness of the supporting leg is slightly smaller than the distance between the two flanges (31); the upper end plane of the supporting leg (4) is provided with a threaded through hole (41), and the upper end of the supporting leg (4) is embedded between the two flanges (31) and fixedly connected through a bolt and nut combination (7).

8. The solid phase microextraction aid of claim 1, wherein: and a leveling bubble (2) is arranged on the circumferential surface of the tripod fixed disc (3).