CN212067818U

CN212067818U - Gas-assisted liquid-liquid micro-extraction device for pretreatment of water quality inspection

Info

Publication number: CN212067818U
Application number: CN202020668551.6U
Authority: CN
Inventors: 郑波
Original assignee: Sichuan Kafu Detection Technology Co ltd
Current assignee: Sichuan Kafu Detection Technology Co ltd
Priority date: 2020-04-28
Filing date: 2020-04-28
Publication date: 2020-12-04
Anticipated expiration: 2030-04-28

Abstract

The utility model discloses a processing gas helps liquid-liquid micro-extraction device before water quality testing, including first barrel, second barrel, first barrel is including first thick pipeline section, first gradual change section, the first thin pipeline section from the bottom up in proper order, the top of first thin pipeline section is sealed, the second barrel is including thick pipeline section, second gradual change section, the thin pipeline section of second from the bottom up in proper order, the open-top of the thin pipeline section of second, in the first barrel can be located to the second barrel cover, second thin pipeline section top is equipped with the stopper, is equipped with the piston in the second gradual change section, the outer wall of piston is hugged closely in the inner wall of second gradual change section. The utility model is convenient for small-dose extraction, simple in operation and space-saving; the extraction effect is improved; prevent to mix into the advantage of other impurity, also more convenient accurate sample and control.

Description

Gas-assisted liquid-liquid micro-extraction device for pretreatment of water quality inspection

Technical Field

The utility model relates to a water quality testing technical field specifically is a little extraction device of gas-assisted liquid for water quality testing pretreatment.

Background

Extraction is one of the means used in organic chemistry laboratories to purify and purify compounds by extracting the desired substance from a solid or liquid mixture. Although extraction is often used in chemical experiments, its operation does not cause a change (or chemical reaction) in the chemical composition of the extracted substance, so the extraction operation is a physical process.

The liquid-liquid extraction method is also called solvent extraction or extraction. A process for separating and extracting components from a liquid mixture with a solvent. The separation or extraction is achieved by adding to the liquid mixture a selected solvent which is immiscible (or slightly miscible) with the liquid mixture, taking advantage of the different solubility of its components in the solvent. For example, phenol is separated from coal tar using benzene as a solvent, and acetic acid is recovered from a dilute acetic acid solution using isopropyl ether as a solvent. In the laboratory, the extraction is carried out by an instrument such as a separating funnel, and the extraction is industrially carried out in a packed tower, a sieve plate tower, a centrifugal extractor, a spray extractor, and the like. The method is widely applied to the industrial aspects of organic chemistry, petroleum, food, water treatment, pharmacy, rare elements, atomic energy and the like.

Micro-extraction is another form of liquid-liquid extraction technique, using phase ratio values (V) in the range of 0.001-0.01 to perform the extraction process. Compared with the traditional liquid-liquid extraction, it adopts a small volume of organic solvent. Micro-extraction provides poor recovery, but the concentration of the desired substance in the organic phase is greatly increased. In addition, the amount of solvent used is also greatly reduced. The extraction is carried out in volumetric flasks, organic solvents can be chosen that are less dense than water, with the result that they accumulate in the neck portion and facilitate their extraction. The concentration of the test substance in the organic phase can be enhanced by salting out. The determination can be carried out by methods employing sample addition internal standards and extraction calibration standards.

The water quality inspection is the work of testing the physicochemical properties of supplied water and contained microorganisms and the like in the hydrogeological exploration of the supplied water. The purpose of water quality inspection is to examine the quality of the environment, to investigate whether water quality is suitable or suitable, to examine the pollution or the degree of pollution of water, to examine the efficiency of a water treatment process, and the like. The inspection items of the water sample are determined according to the inspection purpose and the properties of the water sample, and the obtained data should be comprehensively evaluated to illustrate the water quality.

Because the supplied water often contains substances such as solid particles, suspended solids, microorganisms, stones, metal particles and the like, the components are complex, and meanwhile, the concentration of the substances to be detected is often very low and difficult to directly measure, therefore, a complex water sample can be analyzed and measured after pretreatment, and the pretreatment of water quality inspection mainly aims to: and the trace components to be detected are concentrated, the sensitivity of the method is improved, the detection limit is reduced, and the matrix, other interfering substances and the like in the sample are removed. In the pretreatment process of water quality inspection, an extraction device is commonly used. However, the existing extraction device still has some defects: adding water sample and solvent often needs devices such as valve, separating funnel, need remove the mixed liquid after the extraction to centrifugal device again and carry out the centrifugation after the extraction, and equipment is complicated, troublesome poeration, efficiency is lower, simultaneously, when the extraction of small dose, inconvenient operation.

SUMMERY OF THE UTILITY MODEL

For overcoming the deficiencies of the prior art, the utility model provides a little extraction device of gas-assisted liquid for water quality testing pretreatment solves current extraction device troublesome poeration, inconvenient small dose extraction scheduling problem.

The utility model provides a technical scheme that above-mentioned problem adopted is:

the utility model provides a little extraction device of gas-assisted liquid for water quality testing pretreatment, includes first barrel, second barrel, first barrel includes first thick pipeline section, first gradual change section, the first thin pipeline section from the bottom up in proper order, the top of first thin pipeline section is sealed, the second barrel includes thick pipeline section, second gradual change section, the thin pipeline section of second from the bottom up in proper order, the open-top of the thin pipeline section of second, the second barrel can overlap and locate in the first barrel, second thin pipeline section top is equipped with the stopper, is equipped with the piston in the second gradual change section, the outer wall of piston hugs closely in the inner wall of second gradual change section.

The utility model discloses an innovation point is: the second cylinder is used as a space for mixing the water sample and the extracting agent, the piston is used for sucking the water sample and the extracting agent and mixing the water sample and the extracting agent, the first cylinder is tightly sleeved outside the second cylinder, the liquid is sealed, small-dose extraction is convenient, the operation is simple, and the space is saved. After extraction, the second barrel is with the airtight second tubule section of stopper, can directly be used for follow-up centrifugal operation after the upset, and the space of placing of mixed liquid is regarded as to the second tubule section, also makes things convenient for after follow-up centrifugal operation to accomodate target material totally here.

Preferably, the piston further comprises a handle connected to the bottom end of the piston. The arrangement of the handle makes the push-and-pull of the piston more convenient and the operation more convenient.

Preferably, the first transition section and the second transition section are both in the shape of an inverted frustum. The slope of the inner wall of the inverted frustum shape enables liquid to pass through more smoothly, power assistance is provided for effective uniform mixing, and the extraction effect is improved.

Preferably, the plug is a polytetrafluoroethylene soft rotating plug. The polytetrafluoroethylene has stable property and good sealing effect, is corrosion resistant, and can prevent other impurities from being mixed.

Preferably, the outer surface of the second thick pipe section is embedded with volume graduation mark. More convenient accurate sampling and control.

Compared with the prior art, the utility model, following beneficial effect has:

(1) the utility model is convenient for small-dose extraction, simple in operation and space-saving;

(2) the utility model improves the extraction effect;

(3) the utility model discloses prevent to sneak into the advantage of other impurity, also make things convenient for accurate sample and control more.

Drawings

Fig. 1 is a schematic structural diagram of a first cylinder according to the present invention;

fig. 2 is a schematic structural view of a second cylinder according to the present invention;

fig. 3 is a schematic structural diagram of the present invention.

Reference numbers and corresponding part names in the drawings: 1. the device comprises a first cylinder body, a second cylinder body, a first thick pipe section, a first gradual change section, a first thin pipe section, a second thick pipe section, a first gradual change section, a second gradual change section, a first thin pipe section, a second thick pipe section, a second gradual change section, a second thin pipe section, a second gradual change section, a.

Detailed Description

The present invention will be described in further detail with reference to the following examples and drawings, but the present invention is not limited thereto.

Example 1

In a certain underground water research laboratory, trace metal and organic matter particles of a water sample need to be extracted and removed in a pretreatment stage of water quality inspection. But the prior extraction device has the disadvantages of troublesome operation and inconvenient small-dose extraction, and the laboratory implements the utility model, thereby obtaining obvious improvement.

As shown in fig. 1, fig. 2, fig. 3, a little extraction device of gas-assisted liquid is used before water quality testing pretreatment, including first barrel 1, second barrel 2, first barrel 1 is including first thick pipeline section 11, first gradual change section 12, the first thin pipeline section 13 of from the bottom up in proper order, the top of first thin pipeline section 13 is sealed, second barrel 2 is including thick pipeline section 21 of second, second gradual change section 22, the thin pipeline section 23 of second from the bottom up in proper order, the open-top of the thin pipeline section 23 of second, in second barrel 2 can overlap and locate first barrel 1, the thin pipeline section 23 of second top is equipped with stopper 24, is equipped with piston 25 in the gradual change section 22 of second, the outer wall of piston 25 hugs closely in the inner wall of second gradual change section 22.

Preferably, a handle 26 is further included, the handle 26 being connected to the bottom end of the piston 25.

Preferably, the first transition section 12 and the second transition section 22 are both in the shape of an inverted frustum.

During the use, take off stopper 24, slowly stimulate piston 25, absorb water sample and extractant, then with first barrel 1 closely the cover locate the second barrel 2 outside, push-and-pull piston 25 from top to bottom utilizes the power helping hand of air in the mixture of water sample and extractant at second barrel 2, convenient small dose extraction, easy operation saves space. After the extraction operation, the first cylinder 1 is taken down, the second thin pipe section 23 is sealed by the plug 24, the piston 25 is taken out, the second cylinder 2 is directly inverted, and the mixture liquid after the extraction in the second cylinder 2 is placed in a centrifugal machine for centrifugal operation.

As a further improvement, the handle 26 is arranged to facilitate the pushing and pulling of the piston 25 and the operation; the slope of the inner wall of the inverted frustum shape enables liquid to pass through more smoothly, power assistance is provided for effective uniform mixing, and the extraction effect is improved.

Example 2

As shown in fig. 1, 2, and 3, as a further optimization of embodiment 1, embodiment 2 includes all the technical features of embodiment 1, and in addition, embodiment 2 includes the following technical features:

preferably, the plug 24 is a polytetrafluoroethylene soft spin plug. The polytetrafluoroethylene has stable property and good sealing effect, is corrosion resistant, and can prevent other impurities from being mixed.

Preferably, the outer surface of the second thick pipe section 21 is embedded with volume graduation mark. More convenient accurate sampling and control.

Compared with embodiment 1, this embodiment also has the advantage of preventing the mixing of other impurities, and also facilitates accurate sampling and control.

As described above, the present invention can be preferably realized.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and the technical essence of the present invention is that within the spirit and principle of the present invention, any simple modification, equivalent replacement, and improvement made to the above embodiments are all within the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides a little extraction element of gas-assisted liquid for water quality testing pretreatment, a serial communication port, including first barrel (1), second barrel (2), first barrel (1) is including first thick pipeline section (11), first gradual change section (12), first thin pipeline section (13) from the bottom up in proper order, the top of first thin pipeline section (13) is sealed, second barrel (2) are including thick pipeline section (21), second gradual change section (22), the thin pipeline section of second (23) from the bottom up in proper order, the open-top of the thin pipeline section of second (23), second barrel (2) can overlap and locate in first barrel (1), the thin pipeline section of second (23) top is equipped with stopper (24), is equipped with piston (25) in second gradual change section (22), the outer wall of piston (25) hugs closely in the inner wall of second gradual change section (22).

2. The gas-assisted liquid-liquid microextraction device for pretreatment of water quality inspection as set forth in claim 1, further comprising a handle (26), wherein said handle (26) is connected to the bottom end of the piston (25).

3. The gas-assisted liquid-liquid microextraction device for pretreatment of water quality inspection as set forth in claim 1, wherein said first transition section (12) and said second transition section (22) are both in the shape of an inverted frustum.

4. The gas-assisted liquid-liquid microextraction device for pretreatment of water quality inspection as set forth in claim 1, wherein said plug (24) is a polytetrafluoroethylene soft rotary plug.

5. The gas-assisted liquid-liquid micro-extraction device for pretreatment of water quality inspection as recited in claim 1, wherein volume graduation mark marks are embedded on the outer surface of the second thick pipe section (21).