SPME heating and sample injection fixing device

Abstract

The utility model relates to an SPME (solid phase microextraction) heating and sample injection fixing device, which particularly belongs to the technical field of solid phase microextraction and comprises a water bath heating mechanism and a fixing mechanism for fixing a solid phase microextractor. The solid-phase micro-extractor comprises an SPME handle and an extraction head; the fixing mechanism comprises a bottom supporting ring, an upper connecting rod and a lower connecting rod; the extraction head assembly is arranged above the bottom supporting ring; the upper connecting rod and the lower connecting rod are matched in a telescopic extension manner; and the lower connecting rod is provided with a positioning ring which is matched with the insertion and fixation of the SPME handle. The SPME heating and sample injection fixing device has the advantage that the distance between the solid-phase microextractor and the heat source can be adjusted more conveniently.

Description

Technical Field

[0001] The utility model belongs to the technical field of solid phase microextraction, and specifically relates to an SPME heating and sample injection fixing device. Background Art

[0002] Solid phase microextraction is a new sample pretreatment technology developed in response to the requirements of modern instruments. This technology overcomes all the shortcomings of some traditional sample treatment technologies and integrates sampling, extraction, concentration and injection. It truly realizes sample collection and enrichment and can be used in conjunction with gas phase, gas phase-mass spectrometry, liquid phase, and liquid phase-mass spectrometry.

[0003] In the laboratory, the current method for fixing the solid phase microextractor is to tie the solid phase microextractor to a glass rod with tape and clamp the end of the glass rod with a test tube rack to fix the solid phase microextractor. However, the disadvantage of the above fixing method is that the staff cannot more conveniently adjust the height position between the solid phase microextractor and the heat source. Therefore, under this background, the laboratory staff invented another improvement plan. Utility Model Content

[0004] The utility model aims to provide an SPME heating and sample injection fixing device, which has the advantage of more conveniently adjusting the distance between a solid phase microextractor and a heat source.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A SPME heating and sample injection fixing device comprises a water bath heating mechanism and a fixing mechanism for fixing a solid phase microextractor; the solid phase microextractor comprises an SPME handle and an extraction head; the fixing mechanism comprises a bottom supporting ring, an upper connecting rod and a lower connecting rod; the extraction head is arranged above the bottom supporting ring; the upper connecting rod and the lower connecting rod can be extended and matched; the lower connecting rod is provided with a positioning ring adapted to insert and fix the SPME handle.

[0007] Working principle of the fixing mechanism:

[0008] The extraction head of the solid phase microextractor can be placed above the bottom support ring for tightening and fixing. The SPME handle is tightly fixed to the inner side of the positioning ring. This allows the upper and lower parts of the solid phase microextractor to be fixed separately to prevent the solid phase microextractor from twisting and deforming during operation. At the same time, by adjusting the length between the upper connecting rod and the lower connecting rod, the distance between the extraction head and the heat source can be adjusted, such as the height of the water bath submerged position.

[0009] Preferably, the upper connecting rod is provided with a plurality of fixed sockets, and correspondingly, the lower connecting rod is provided with plug blocks which are plugged and fixed to the fixed sockets.

[0010] The matching principle of the fixed jack and the plug block:

[0011] By adjusting the insert blocks on the lower connecting rod to be correspondingly embedded in different fixed insert holes on the upper connecting rod, the length between the upper connecting rod and the lower connecting rod can be adjusted. This adjustment method is simple and will not cause a large movement of the solid phase microextractor.

[0012] Preferably, the lower connecting rod is fixed with a threaded ring for fixing the extraction head.

[0013] The inside of the threaded ring fits against the side wall of the extraction head, which is conducive to further fixing it.

[0014] Preferably, the fixing mechanism also includes a hanging rod, an extension rod, a fixing sleeve and a locking bolt; the upper connecting rod is suspended on the hanging rod by a hook; the fixing sleeve is sleeved on the extension rod, the fixing sleeve is fixed to the end of the hanging rod, the fixing sleeve is provided with a threaded hole, and the locking bolt passes through the threaded hole and is tightly pressed against the extension rod.

[0015] Working principle of the hanging rod, extension rod, fixing sleeve and locking bolt:

[0016] The staff can adjust the distance between the solid phase microextractor and the heat source at a macro level by adjusting the upper and lower positions of the hanging rod on the extension rod. After the adjustment is completed, the locking bolt can be screwed into the threaded hole on the fixing sleeve so that the end of the locking bolt is pressed against the extension rod to achieve fixation.

[0017] Preferably, the water bath heating mechanism comprises a water bath box and a support plate, wherein the support plate is detachably mounted in the water bath box, and the support plate is in close contact with the lower end of the bottom support ring.

[0018] Preferably, a fixing buckle is provided at the side end of the water bath, and the extension rod is plugged and fixed on the fixing buckle.

[0019] The function of the fixing buckle is to fix the extension rod. The plug-in matching method is also more convenient for disassembly and assembly.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] 1. By using the SPME heating and sample injection fixture, it is convenient to adjust the distance between the solid phase microextractor and the heat source, so that the extraction head is completely submerged in the water bath, which is beneficial to the pretreatment.

[0022] 2. Compared with the traditional method of wrapping with tape, this method is easier to disassemble and assemble, avoiding damage to the solid phase microextractor during disassembly and assembly.

[0023] 3. The solid phase microextractor has a better fixing effect, with both bottom support and fixation of the extraction head and enclosure and fixation of the side end of the extraction head. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure of a SPME heating and sample injection fixture (reverse side);

[0025] Figure 2 This is a schematic diagram of the structure of an SPME heating and injection fixture (front).

[0026] In the figure: 1. extension rod, 2. fixing sleeve, 3. locking bolt, 4. hanging rod, 5. hook, 6. upper connecting rod, 7. plug block, 8. positioning ring, 9. lower connecting rod, 10. threaded ring, 11. bottom support ring, 12. support plate, 13. fixing buckle, 14. water bath, 15. SPME handle, 16. extraction head. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Example

[0029] Based on the above description, this embodiment makes the following supplements from the perspective of application:

[0030] A SPME heating and sample injection fixture, the main body of which includes:

[0031] Water bath heating mechanism;

[0032] Wherein, the water bath heating mechanism includes a water bath box 14 and a support plate 12;

[0033] Fixed mechanism;

[0034] The fixing mechanism includes a bottom supporting ring 11 , an upper connecting rod 6 , a lower connecting rod 9 , a hanging rod 4 , an extension rod 1 , a fixing sleeve 2 and a locking bolt 3 .

[0035] In practical applications, the threaded ring 10 can be self-adaptively twisted and deformed, and can be adjusted to suit the shape of the extraction head 16. For example, when the extraction head 16 is slightly smaller, the threaded ring 10 can be pinched to clamp and fix it with the extraction head 16.

Claims

1. A SPME heating and sample injection fixture, characterized in that: It includes a water bath heating mechanism and a fixing mechanism for fixing the solid phase microextractor; The solid phase microextractor comprises an SPME handle (15) and an extraction head (16); The fixing mechanism comprises a bottom supporting ring (11), an upper connecting rod (6) and a lower connecting rod (9); The extraction head (16) is placed above the bottom support ring (11); The upper connecting rod (6) and the lower connecting rod (9) can be extended and matched with each other in a telescopic manner; The lower connecting rod (9) is provided with a positioning ring (8) adapted to fit the SPME handle (15) for insertion and fixation.

2. A SPME heating and sample injection fixture according to claim 1, characterized in that: The upper connecting rod (6) is provided with a plurality of fixed plug holes, and correspondingly, the lower connecting rod (9) is provided with an insert block (7) which is plugged and fixed to the fixed plug holes.

3. A SPME heating and sample injection fixture according to claim 1, characterized in that: The lower connecting rod (9) is fixedly provided with a threaded ring (10) for fixing the extraction head (16).

4. The SPME heating and sample injection fixture according to claim 1, characterized in that: The fixing mechanism also includes a hanging rod (4), an extension rod (1), a fixing sleeve (2) and a locking bolt (3); The upper connecting rod (6) is hung on the hanging rod (4) via a hook (5); The fixing sleeve (2) is sleeved on the extension rod (1), and the fixing sleeve (2) is fixed to the end of the hanging rod (4). The fixing sleeve (2) is provided with a threaded hole, and the locking bolt (3) passes through the threaded hole and is tightly pressed against the extension rod (1).

5. A SPME heating and sample injection fixture according to claim 4, characterized in that: The water bath heating mechanism comprises a water bath box (14) and a support plate (12). The support plate (12) is detachably mounted in the water bath box (14), and the support plate (12) is tightly attached to the lower end of the bottom support ring (11).

6. A SPME heating and sample injection fixture according to claim 5, characterized in that: A fixing buckle (13) is provided at the side end of the water bath box (14), and the extension rod (1) is plugged and fixed on the fixing buckle (13).

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