Dispersion liquid-liquid microextraction device

Abstract

The utility model discloses a dispersive liquid-liquid microextraction device, which relates to the technical field of dispersive liquid-liquid microextraction devices, and comprises a base, an extraction mechanism is arranged at the top of the base and used for automatically adjusting the depth length of a sampling needle and reducing space utilization, and the extraction mechanism comprises a cup body assembly, a sampling assembly, a liquid inlet and a liquid outlet, the mixing device is used for mixing the solution; the adjusting assembly is arranged at the top of the base and comprises a mounting frame fixedly mounted at the top of the base, a threaded rod is mounted in the mounting frame through a bearing, the top of the threaded rod movably penetrates through the top of the mounting frame, and a second motor is mounted at the top of the threaded rod; the threaded rod rotates to drive the lifting rod to move up and down, and the lifting rod drives the sampling needle to enter the extraction cup through the insertion hole, so that the depth length of the sampling needle in the extraction cup is adjusted, the operation complexity is reduced, and the working efficiency is also improved.

Description

Technical Field

[0001] The utility model relates to the technical field of dispersed liquid-liquid micro-extraction devices, in particular to a dispersed liquid-liquid micro-extraction device. Background Art

[0002] By comparing market prices, safety and pollution, and conducting comparative experiments, we controlled the amounts of the same substances: dichloromethane, petroleum ether, decamethylcyclopentasiloxane, and dimethyl sulfoxide. We conducted multiple experiments and plotted the results. Finally, after many aspects (economical, green, and efficient) of comparative experiments, we found that the most suitable extraction agent was dimethyl sulfoxide (DMSO).

[0003] According to the patent name: A device for suspended dispersed liquid-liquid microextraction (patent publication number: CN209188185U, patent publication date: 2019-08-02), including a supporting base plate, a base, a control box and a water bath, the base is arranged below the supporting base plate, the control box is arranged on the supporting base plate, a display screen is arranged on the panel of the control box, an operating knob is arranged below the display screen, the water bath is arranged on one side of the control box, a water bath tank is arranged in the water bath tank, a reagent bottle is arranged in the water bath tank, a detection cover is arranged on the reagent bottle, a mesh is arranged on the detection cover, and a water pump is arranged above the water bath. The beneficial effect is that the utility model uses ultrasonic waves to mix and vibrate the solution, and the sampling needle is inserted into the extraction cup body. The penetration length of the sampling needle can be adjusted, and the position of the needle tip is observed for judgment. The operation is simple, and a flow meter is arranged on the sampling tube to facilitate subsequent precision analysis.

[0004] Based on the above-mentioned prior art, the existing dispersed liquid-liquid microextraction device still has the following problems. At present, the sampling needle of the dispersed liquid-liquid microextraction device generally relies on manual operation to accurately adjust the depth length, which not only increases the complexity of the operation, but also reduces the work efficiency. At the same time, the existing device often occupies too large an area, which is not only not conducive to the space utilization of the laboratory, but also increases the difficulty of transportation and installation of the equipment. Therefore, the utility model provides a dispersed liquid-liquid microextraction device. Utility Model Content

[0005] In view of the shortcomings of the prior art, the utility model provides a dispersed liquid-liquid microextraction device, which solves the following problems existing in the existing dispersed liquid-liquid microextraction devices. At present, the sampling needles of the dispersed liquid-liquid microextraction devices generally rely on manual operation to perform precise adjustment of the depth length, which not only increases the complexity of the operation, but also reduces the work efficiency. At the same time, the existing devices often occupy too large an area, which is not only not conducive to the space utilization of the laboratory, but also increases the difficulty of transportation and installation of the equipment.

[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: a dispersed liquid-liquid microextraction device, comprising a base, the top of which is provided with an extraction mechanism for automatically adjusting the penetration length of the sampling needle and reducing space utilization, the extraction mechanism comprising:

[0007] A cup assembly is disposed on the top of the base and is used to mix the solution;

[0008] The adjusting assembly is arranged on the top of the base, and includes a mounting frame fixedly installed on the top of the base, wherein a threaded rod is installed inside the mounting frame through a bearing, and the top of the threaded rod movably passes through the top of the mounting frame and a second motor is installed on the top of the mounting frame, and a limiting column is fixedly installed inside the mounting frame, and a lifting rod is provided on the outer threaded sleeve of the second motor.

[0009] Preferably, the extraction mechanism also includes a rotating shaft rotatably mounted on the top of the base through a bearing, a turntable is fixedly mounted on the top of the rotating shaft, an ultrasonic generator is fixedly mounted on the top of the turntable, a worm is fixedly mounted on the outer ring of the rotating shaft, a first motor is fixedly mounted on the top of the base, and a worm is fixedly mounted on the output end of the first motor.

[0010] Preferably, the extraction mechanism further comprises two fixing plates fixedly mounted on the top of the turntable, a damper is fixedly mounted on the inner side of the fixing plates, a return spring is provided on the outer ring of the damper, and a clamping block is fixedly mounted on one end of the damper.

[0011] Preferably, the cup body assembly comprises an extraction cup placed on top of the ultrasonic generator, the top cover of the extraction cup is provided with a sealing plug, a plug hole is provided inside the sealing plug, and an observation window is provided in the front of the extraction cup.

[0012] Preferably, the extraction mechanism further comprises a water pump fixedly mounted on the top of the base, a suction tube is fixedly mounted on the top of the water pump, a sampling needle is fixedly mounted on one end of the suction tube, and the sampling needle is fixedly passed through one end of the lifting rod.

[0013] Preferably, the worm wheel is mounted in meshing engagement with the worm.

[0014] The utility model provides a dispersed liquid-liquid microextraction device. Compared with the prior art, it has the following

[0015] Beneficial effects:

[0016] (1) The dispersed liquid-liquid microextraction device is provided with an adjustment component. The second motor drives the threaded rod to rotate, and the rotation of the threaded rod drives the lifting rod to move up and down. The lifting rod drives the sampling needle to enter the interior of the extraction cup through the insertion hole, thereby adjusting the penetration length of the sampling needle into the extraction cup, reducing the complexity of operation and increasing work efficiency.

[0017] (2) The dispersed liquid-liquid microextraction device is installed on the top of the base by combining the mixing and separation components, the clamping components, the cup body components, the adjustment components, and the sampling components, thereby reducing the footprint of the device, thereby facilitating the space utilization of the laboratory and reducing the difficulty of transportation and installation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a right-side stereoscopic structural diagram of the utility model;

[0019] Figure 2 This is a three-dimensional structural diagram of the mixing and separation component of the utility model;

[0020] Figure 3 It is a three-dimensional structural diagram of part of the structure of the utility model;

[0021] Figure 4 It is a partial structural three-dimensional diagram of the utility model.

[0022] In the figure: 1-base, 2-extraction mechanism, 21-mixing and separation component, 211-rotating shaft, 212-turntable, 213-ultrasonic generator, 214-first motor, 215-worm, 216-worm wheel, 22-clamping component, 221-fixed plate, 222-damper, 223-reset spring, 224-clamping block, 23-cup body component, 231-extraction cup, 232-sealing plug, 233-jack, 234-observation window, 24-adjusting component, 241-mounting frame, 242-threaded rod, 243-second motor, 244-limiting column, 245-lifting rod, 25-sampling component, 251-water pump, 252-suction tube, 253-sampling needle. DETAILED DESCRIPTION

[0023] 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.

[0024] See also Figure 1-4 , the utility model provides a technical solution:

[0025] A dispersed liquid-liquid microextraction device comprises a base 1, and an extraction mechanism 2 is arranged on the top of the base 1 for automatically adjusting the penetration length of the sampling needle and reducing space utilization, and the extraction mechanism 2 comprises:

[0026] The cup assembly 23 is disposed on the top of the base 1 and is used to mix the solution;

[0027] The adjustment component 24 is arranged on the top of the base 1, and includes a mounting frame 241 fixedly mounted on the top of the base 1. A threaded rod 242 is mounted inside the mounting frame 241 through a bearing. The top of the threaded rod 242 movably penetrates the top of the mounting frame 241. A second motor 243 is mounted on the top of the mounting frame 241. The second motor 243 is OMV800, which is electrically connected to an external power supply and can be opened and closed by a person operating the control panel. A limiting column 244 is fixedly mounted inside the mounting frame 241. A lifting rod 245 is provided on the outer threaded sleeve of the second motor 243. The second motor 243 drives the threaded rod 242 when it runs. The threaded rod 242 rotates to drive the lifting rod 245 to move up and down, and the lifting rod 245 drives the sampling needle 253 to enter the interior of the extraction cup 231 through the jack 233, thereby adjusting the penetration length of the sampling needle 253 in the extraction cup 231, reducing the complexity of the operation and increasing the work efficiency. The mixing and separation component 21, the clamping component 22, the cup body component 23, the adjustment component 24, and the sampling component 25 are combined and installed on the top of the base 1, thereby reducing the footprint of the device, which is beneficial to the space utilization of the laboratory and reduces the difficulty of transportation and installation of the equipment.

[0028] In this embodiment, the extraction mechanism 2 also includes a rotating shaft 211 rotatably mounted on the top of the base 1 through a bearing, a turntable 212 is fixedly mounted on the top of the rotating shaft 211, an ultrasonic generator 213 is fixedly mounted on the top of the turntable 212, a worm gear 216 is fixedly mounted on the outer ring of the rotating shaft 211, and a first motor 214 is fixedly mounted on the top of the base 1. The first motor 214 is OMV800, which is electrically connected to an external power supply and is opened and closed by a person operating the control panel. A worm 215 is fixedly mounted on the output end of the first motor 214, and the worm gear 216 is meshed with the worm 215. The operation of the first motor 214 drives the worm 215 to rotate, the worm 215 drives the worm gear 216 to rotate, and the worm gear 216 drives the rotating shaft 211, the turntable 212 and the ultrasonic generator 213 to rotate, thereby driving the extraction cup 231 to rotate to centrifuge the emulsion, so that the extractant containing the target compound is suspended on the surface of the sample aqueous solution.

[0029] In this embodiment, the extraction mechanism 2 also includes two fixed plates 221 fixedly installed on the top of the turntable 212, a damper 222 is fixedly installed on the inner side of the fixed plate 221, the outer ring of the damper 222 is provided with a return spring 223, a clamping block 224 is fixedly installed on one end of the damper 222, the extraction cup 231 is placed between the two clamping blocks 224, and the return spring 223 pushes the clamping block 224 through its own elasticity to clamp and fix the extraction cup 231.

[0030] In this embodiment, the cup assembly 23 includes an extraction cup 231 placed on the top of the ultrasonic generator 213, the top cover of the extraction cup 231 is equipped with a sealing plug 232, the interior of the sealing plug 232 is provided with a plug hole 233, and the front of the extraction cup 231 is provided with an observation window 234. The sample aqueous solution is added to the extraction cup 231, and the uniformly mixed dispersant and extractant are injected into the container by a syringe, and the plug hole 233 is plugged into the top of the extraction cup 231. Then the ultrasonic generator 213 emits ultrasonic waves, and the mixed solution in the extraction cup 231 oscillates under the action of ultrasonic waves to form an emulsion. The extractant is dimethyl sulfoxide (DMSO). By comparing market prices, safety and pollution, and comparative experiments, the amounts of dichloromethane, petroleum ether, decamethylcyclopentasiloxane, and dimethyl sulfoxide of the same substance are controlled, and multiple experiments are carried out. The results are plotted in charts, and finally, after multi-faceted (economical, green, and efficient) comparative experiments, the most suitable extractant is found to be dimethyl sulfoxide (DMSO).

[0031] In this embodiment, the extraction mechanism 2 also includes a water pump 251 fixedly installed on the top of the base 1. The water pump 251 model is N5100-020, which is electrically connected to an external power supply and is turned on and off by a person operating the control panel. A suction tube 252 is fixedly installed on the top of the water pump 251, and a sampling needle 253 is fixedly installed at one end of the suction tube 252, and the sampling needle 253 is fixedly passed through one end of the lifting rod 245. The water pump 251 runs through the suction tube 252 to connect the sampling needle 253, and the extractant is extracted through the sampling needle 253.

[0032] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0033] When working, first connect the device to an external power source, then place the extraction cup 231 between the two clamping blocks 224, the return spring 223 pushes the clamping block 224 through its own elasticity to clamp and fix the extraction cup 231, then add the sample aqueous solution into the extraction cup 231, use a syringe to inject the evenly mixed dispersant and extractant into the container, plug the jack 233 into the top of the extraction cup 231, then the ultrasonic generator 213 emits ultrasonic waves, and the mixed solution in the extraction cup 231 oscillates under the action of ultrasonic waves to form an emulsion, then the first motor 214 runs to drive the worm 215 to rotate, the worm 215 drives the worm gear 216 to rotate, and the worm gear 216 drives the rotating shaft 211, the rotating disk 212 and The ultrasonic generator 213 rotates, thereby driving the extraction cup 231 to rotate to centrifuge the emulsion, so that the extractant containing the target compound is suspended on the surface of the sample aqueous solution. Then the second motor 243 runs to drive the threaded rod 242 to rotate, and the threaded rod 242 rotates to drive the lifting rod 245 to move up and down. The lifting rod 245 drives the sampling needle 253 to enter the interior of the extraction cup 231 through the jack 233, adjusts the penetration length of the sampling needle 253 in the extraction cup 231, and adjusts the liquid sampling depth of the sampling needle 253 to ensure that the sampling needle 253 is located above the aqueous solution to prevent the sample aqueous solution from being taken out. Then the water pump 251 runs to connect the sampling needle 253 through the suction tube 252 to extract the extractant through the sampling needle 253.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dispersed liquid-liquid microextraction device, comprising a base (1), characterized in that: An extraction mechanism (2) is arranged on the top of the base (1) for automatically adjusting the penetration length of the sampling needle and reducing space utilization. The extraction mechanism (2) comprises: A cup assembly (23) is disposed on the top of the base (1) and is used to mix the solution; The adjustment assembly (24) is arranged on the top of the base (1), and includes a mounting frame (241) fixedly mounted on the top of the base (1), wherein a threaded rod (242) is mounted inside the mounting frame (241) via a bearing, the top of the threaded rod (242) movably passes through the top of the mounting frame (241), and a second motor (243) is mounted on the top of the mounting frame (241), a limiting column (244) is fixedly mounted inside the mounting frame (241), and a lifting rod (245) is provided on the outer threaded sleeve of the second motor (243).

2. A dispersed liquid-liquid microextraction device according to claim 1, characterized in that: The extraction mechanism (2) further comprises a rotating shaft (211) rotatably mounted on the top of the base (1) via a bearing, a rotating disk (212) being fixedly mounted on the top of the rotating shaft (211), an ultrasonic generator (213) being fixedly mounted on the top of the rotating disk (212), a worm gear (216) being fixedly mounted on the outer ring of the rotating shaft (211), a first motor (214) being fixedly mounted on the top of the base (1), and a worm (215) being fixedly mounted on the output end of the first motor (214).

3. A dispersed liquid-liquid microextraction device according to claim 2, characterized in that: The extraction mechanism (2) further comprises two fixing plates (221) fixedly mounted on the top of the rotating disk (212); a damper (222) is fixedly mounted on the inner side of the fixing plates (221); a return spring (223) is provided on the outer ring of the damper (222); and a clamping block (224) is fixedly mounted on one end of the damper (222).

4. The dispersed liquid-liquid microextraction device according to claim 2, characterized in that: The cup body assembly (23) comprises an extraction cup (231) placed on the top of the ultrasonic generator (213); the top cover of the extraction cup (231) is provided with a sealing plug (232); a plug hole (233) is provided inside the sealing plug (232); and an observation window (234) is provided in the front of the extraction cup (231).

5. The dispersed liquid-liquid microextraction device according to claim 1, characterized in that: The extraction mechanism (2) further comprises a water pump (251) fixedly mounted on the top of the base (1), a suction tube (252) fixedly mounted on the top of the water pump (251), a sampling needle (253) fixedly mounted on one end of the suction tube (252), and the sampling needle (253) fixedly passes through one end of the lifting rod (245).

6. The dispersed liquid-liquid microextraction device according to claim 2, characterized in that: The worm wheel (216) is meshedly installed with the worm (215).

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