CN204051063U - A kind of drawing-in type impurity absorption pattern SPE column device - Google Patents

Abstract

The utility model discloses a suction-type impurity adsorption mode solid-phase extraction column device. It includes a column tube; one end of the column tube communicates with a needle, and is close to the needle end, and an upper sieve plate and a lower sieve plate are arranged in the column tube, and a gap between the upper sieve plate and the lower sieve plate is It is filled with filler; the column tube is provided with a piston capable of moving along its axial direction and a piston rod connected with it; the side wall of the column tube communicates with a liquid outlet pipe that can be sealed and arranged. The utility model does not need matching instruments and equipment, and only a simple device is used to complete the purification of the impurity adsorption mode and the separation process of the purification liquid in the quality and safety inspection of agricultural products and food. The operation is convenient and fast, and the adsorption material is effectively prevented from being mixed into the purification liquid.

Description

A pumping impurity adsorption mode solid phase extraction column device

technical field

The utility model relates to a suction-type impurity adsorption mode solid-phase extraction column device.

Background technique

At present, the detection of multi-component residues such as pesticides and mycotoxins in agricultural products, feed and food usually uses the impurity adsorption mode to purify the sample extract. The general practice is to first store the impurity adsorption material in a plastic centrifuge tube. When in use, add an appropriate amount of sample extract to the centrifuge tube and shake and mix with the impurity adsorption material, then centrifuge to precipitate the purification material, and then pipette the supernatant to complete the purification process. However, there are 2 problems with this approach. One is that the operation process is relatively cumbersome and requires supporting equipment such as vortex oscillators and centrifuges; the other is that some adsorption materials have light density and small particles, and it is easy to enter the purification solution when pipetting the supernatant, thus affecting the next step. Analysis and detection have adverse effects.

Utility model content

The purpose of this utility model is to provide a solid-phase extraction column device of suction type impurity adsorption mode. The utility model can quickly complete the sample extraction liquid purification process without auxiliary equipment, effectively prevent the adsorption material from being mixed into the purification liquid, and overcome the The existing impurity adsorption mode purification method has the disadvantages of cumbersome operation, special equipment and difficulty in completely separating the adsorption material from the purification solution.

The suction-type impurity adsorption mode solid-phase extraction column device provided by the utility model includes a column tube;

One end of the column tube is connected to a needle, and near the needle end, an upper sieve plate and a lower sieve plate are arranged in the column tube, and fillers are filled between the upper sieve plate and the lower sieve plate;

A piston capable of moving along its axial direction and a piston rod connected thereto are arranged inside the column tube;

The side wall of the column tube communicates with a liquid outlet pipe which can be closed and arranged.

In the solid phase extraction column device, the liquid outlet pipe and the column pipe are vertically arranged to facilitate the discharge of the purified liquid.

In the solid phase extraction column device, the liquid outlet pipe is sealed by a plug, and when the purification liquid needs to be discharged through the liquid outlet pipe, the plug can be removed.

In the solid-phase extraction column device, the upper sieve plate, the lower sieve plate and the column tube are in an interference fit, so that the upper sieve plate, the lower sieve plate, and the lower sieve plate are fixed by this interference pressure. Sieve plate and the packing.

In the solid phase extraction column device, the pore diameters of the upper sieve plate and the lower sieve plate are both smaller than the particle diameter of the filler, so as to prevent the filler from seeping out.

The utility model has the following beneficial effects on the suction type impurity adsorption mode solid phase extraction column device:

The utility model does not need matching instruments and equipment, and only a simple device is used to complete the purification of the impurity adsorption mode and the separation process of the purification liquid in the quality and safety inspection of agricultural products and food. The operation is convenient and fast, and the adsorption material is effectively prevented from being mixed into the purification liquid.

Description of drawings

Fig. 1 is a schematic structural view of the solid-phase extraction column device in the suction impurity adsorption mode of the present invention.

The marks in the figure are as follows:

1 Piston rod, 2 Column tube, 3 Piston, 4 Upper sieve, 5 Packing, 6 Lower sieve, 7 Needle, 8 Sheath, 9 Outlet tube, 10 Plug.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings, but the utility model is not limited to the following embodiments.

As shown in Figure 1, it is a structural schematic diagram of the solid-phase extraction column device of the suction type impurity adsorption mode of the present invention, which includes a high-purity polypropylene material column tube 2, and one end of the column tube 2 is connected with a needle 7, when not in use The needle 7 is covered with a sheath 8 . At the setting end close to the needle 7, the column tube 2 is provided with an upper sieve plate 4 made of high molecular polyethylene material and a lower sieve plate 6 made of high molecular polyethylene material, and the upper sieve plate 4 and the lower sieve plate 6 are filled The filler 5 mixed with high-purity spherical end-capped C18 and carbon nanotubes has an aperture larger than that of the upper sieve plate 4 and the lower sieve plate 6, so as to prevent it from seeping out from the upper sieve plate 4 and the lower sieve plate 6. In the utility model, it is necessary to ensure that the upper sieve plate 4, the lower sieve plate 6 and the column tube 2 are all interference fits, so that the upper sieve plate 4, the lower sieve plate 6 and the packing are firmly fixed by this interference pressure. 7. A piston 3 that can move along its axial direction and a piston rod 1 connected thereto are arranged inside the column tube 2 , and the purification liquid is extracted from the extraction liquid through the cooperation of the piston 3 and the piston rod 1 . The utility model communicates with a liquid outlet pipe 9 on the side wall of the column pipe 2, which is vertically arranged with the column pipe 2, which is helpful for the discharge of the purification liquid, and a plug 10 is matched with the end of the liquid outlet to prevent the Liquid outlet pipe 9 is sealed.

When using the utility model suction impurity adsorption mode solid-phase extraction column device, it can be carried out according to the following steps:

When in use, first remove the sheath 8 of the needle 7, then insert the needle 7 vertically into the sample extract to be purified, and pull the piston rod 1 outward to form a negative pressure so that the sample extract passes through the lower sieve plate 6, the packing 5 and the upper The sieve plate 4 enters the column tube 2 to obtain the purified liquid. Open the plug 10 at the port of the liquid outlet tube 9 by hand, open the liquid port, turn over the column tube 2 so that the liquid outlet port of the liquid tube 9 is facing downwards to the liquid test tube, push the piston rod 1, and the inside of the column tube 2 The purification liquid enters the liquid connection tube under the action of positive pressure and gravity, so as to achieve the purpose of rapid purification of the sample extraction liquid and separation of the purification liquid.

Claims (5)

1. a drawing-in type impurity absorption pattern SPE column device, is characterized in that: it comprises a column jecket;

One end of described column jecket is communicated with a syringe needle, and nearly described needle end, be provided with upper sieve plate and lower sieve plate in described column jecket, between described upper sieve plate and described lower sieve plate, be filled with filler;

Be provided with the piston that can move along its axis in described column jecket and be attached thereto the piston rod connect;

The sidewall of described column jecket is communicated with the drain pipe that can close setting.

2. SPE column device according to claim 1, is characterized in that: arrange for vertical between described drain pipe with described column jecket.

3. SPE column device according to claim 1 and 2, is characterized in that: described drain pipe is sealed by a plug.

4. SPE column device according to claim 3, is characterized in that: described upper sieve plate and between described lower sieve plate and described column jecket for interference fit.

5. SPE column device according to claim 4, is characterized in that: the aperture of described upper sieve plate and described lower sieve plate is all less than the particle diameter of described filler.