51 results about "Separatory funnel" patented technology

This invention discloses a method for determining fiber microplastics in aqueous textile solutions based on fluorescence spectrophotometry, belonging to the field of textile pollutant detection technology. The method includes: S1, collecting wastewater and filtering it through a filter membrane; S2, rinsing the filter membrane with sodium hypochlorite solution; S3, rinsing the fiber microplastics on the filter membrane into a separatory funnel; S4, pouring out a portion of the fiber microplastics from the upper end of the separatory funnel and collecting another portion from the lower end; S5, repeating S1-S4, rinsing the filter membrane with hydrochloric acid during this process, and collecting the remaining fiber microplastics; S6, dyeing the three solutions obtained; S7, preparing standard series solutions using polyester, polyamide, and polypropylene standard liner; S8, measuring and plotting a standard curve of fluorescence intensity versus fiber microplastic concentration using a fluorescence spectrophotometer; S9, measuring the fluorescence intensity of the three solutions obtained in S6. This invention is applicable to the field of aqueous textile solutions, enabling quantitative analysis of unknown samples, and can analyze both single and mixed samples with minimal detection bias.

The invention provides a device and a method for accurately determining suspended matters in water, and relates to the technical field of water quality detection. The device for accurately measuring the suspended matters in the water comprises a bracket, a container, a glass funnel, a pear-shaped separating funnel and filter paper, the pear-shaped separating funnel is fixed on the bracket, is arranged above the glass funnel and is used for conveying liquid into the glass funnel; the glass funnel is arranged at a bottle opening of the container; the filter paper is arranged in the glass funnel; and a liquid outlet pipe orifice of the pear-shaped separating funnel extends into a position which is 1 / 2-2 / 3 of the height of the horn part of the glass funnel. The method for measuring the suspended matters in the water by adopting the device has the advantages that the filtering efficiency is improved, the measurement error is reduced, and the manpower and time are saved.

The application belongs to the technical field of oil and gas field development, and particularly relates to a temperature-resistant and salt-resistant foaming agent for drilling and a synthesis method thereof. The synthesis method is as follows: diphenylamine-4-sodium sulfonate, isopropyl alcohol and 1,3-dibromopropane are added into a four-necked flask, stirred, heated and refluxed to obtain a mixed solution; 90-95wt% of isopropyl alcohol in the mixed solution is distilled off under reduced pressure, distilled water is added, and the whole is transferred into a separatory funnel, fully shaken, separated, and a small amount of oil phase is discarded; the pH is adjusted to 2-3, a precipitate is separated out, suction filtration is performed, and an intermediate is obtained; the intermediate is transferred into a four-necked flask with isopropyl alcohol, sodium bromoethyl sulfonate is added, the pH is adjusted to 7-8, and the product solution is obtained by heating and refluxing; the product is obtained by vacuum distillation, recrystallization and drying. The foaming agent for drilling has the advantages of good temperature resistance, salt resistance and salinity resistance.

A method for preparing methyl silicone resin for high-temperature mica boards includes: (1) Solution A is a mixture of methyltrimethoxysilane, dimethyldimethoxysilane, and epoxysilane coupling agent, which account for 87%-95%, 3%-7%, and 2%-6% of the total amount of A, respectively; (2) Adding 0.5-1.0 times the amount of benzene solvent, 0.2-0.3 times the amount of isopropanol, and adding 0.5%-1% of the total amount of A acidic catalyst to obtain solution B; (3) Heating B to 70℃-80℃, and uniformly adding deionized water, and adding... The time is controlled at 2-3 hours. After the addition is completed, continue stirring for half an hour to obtain solution C. The amount of deionized water is 40%-50% of the total amount of A. (4) Transfer C to a separatory funnel and let it stand to separate into layers. The lower layer of methanol solution is purified by distillation, and the upper layer of silanol solution is washed with water until neutral to obtain solution D. (5) Heat D and reflux for condensation reaction. Maintain the temperature at 130℃-140℃ for half an hour, then cool to room temperature and add benzene solvent to form a 50%-60% concentration of methyl silicone resin for high-temperature mica boards. The benzene solvent content is 40%-50%. It is environmentally friendly, has a simple process, excellent bending resistance, and good moisture resistance.

The utility model discloses a multifunctional conical flask, which belongs to the field of test appliances and comprises a flask body comprising a cylindrical flask opening at the top and a conical flask body at the bottom. The upper liquid outlet is formed in the middle of the bottle body and is provided with an opening and closing structure; the lower liquid outlet is opposite to the upper liquid outlet, the bottom of the lower liquid outlet is flush with the bottom surface of the bottle body, and the lower liquid outlet is also provided with an opening and closing structure; the bottle plug is clamped in the bottle opening, and a stirring assembly is arranged in the bottle plug; the liquid separation bottle has the advantages that the upper liquid outlet and the lower liquid outlet are formed in the bottle body, liquid separation can be achieved at different outlets, compared with a liquid separation funnel, the liquid separation bottle does not need to be fixed through a fixing frame and does not need to be shaken for mixing, and the liquid separation bottle is simple in structure, diversified in function and convenient to use.

The application discloses a small laboratory extraction column, comprising: a support frame; a light phase tank fixedly connected to the upper middle part of the support frame, a heavy phase tank fixedly connected to the lower middle part of the support frame, an extraction column with one end communicated with the light phase tank and the other end communicated with the heavy phase tank, a paddle assembly slidingly connected to the inner wall of the extraction column, the paddle assembly is used for uniformly dispersing the mixture to better carry out mass transfer extraction; a driving assembly installed on the top of the support frame and driving the paddle assembly to reciprocate up and down along the inner wall of the extraction column. The utility model patent solves the problem of low efficiency of using a separatory funnel, limited contact time and contact area of two phases, and poor extraction effect in the prior art.

The application discloses a kind of efficient pretreatment methods for detecting element in extraction system organic phase, it includes the following steps: pipette appropriate amount of measured organic phase to volumetric flask, add appropriate amount of back extraction acid, then add water to 1 / 3-2 / 3 of volumetric flask volume, cover bottle plug; Shake the back extraction of volumetric flask, and stand and separate, then use filter paper to draw and remove upper organic phase, after removing upper organic phase, the remaining aqueous phase is filtered using filter paper and the primary filtrate is discarded, and the filtrate is the sample to be detected, for element analysis detection.The method simplifies the operation process, is simple to operate, high in detection efficiency, and is not easy to contaminate;The organic phase volume used in the pretreatment operation of the method is small, compared with the existing back extraction method of separatory funnel, the amount of organic phase used is one tenth of the back extraction method of separatory funnel, or even less, reducing the waste of organic phase, at the same time, the amount of back extraction acid is reduced, and the amount and consumption of reagent are greatly reduced.

The cleaning brush comprises brush rods, a sleeve, a supporting rod and a bristle fixing rod, the brush rods are of a rod-shaped structure, a handle is arranged at the top end of each brush rod, the sleeve is of a hollow tubular structure, arranged outside the brush rods in a sleeving mode and slidably connected in the length direction of the brush rods, and the bristle fixing rod is of a plate-shaped structure. One end in the length direction is rotatably connected with the bottom end of the brush rod, a sliding rail is arranged on one side, close to the brush rod, of the bristle fixing rod, bristles are arranged on the other side of the bristle fixing rod, the supporting rod is of a rod-shaped structure, one end in the length direction is a rotating end, and the other end of the supporting rod is a sliding end; the sliding end of the supporting rod is in sliding connection with the sliding rail of the bristle fixing rod, an operator holds the upper opening of the separating funnel with one hand, the handle is rotated with the other hand, the bristles are driven to rotate to clean the inner wall of the separating funnel, and stains on the inner wall can be effectively removed.

The invention discloses a method for extracting and separating baicalin and baicalein, which comprises the following steps: S1, weighing thymol and menthol, adding the thymol and the menthol into a three-neck flask, and heating and stirring to form uniform and transparent liquid as an extracting agent thymol-menthol eutectic solvent; s2, mixing the radix scutellariae powder with a 50% ethanol solution, heating, condensing and refluxing twice to obtain an extracting solution, centrifuging, taking supernate, and concentrating to obtain a radix scutellariae extracting solution. And S3, putting the scutellaria baicalensis extracting solution and an extracting agent into a high-pressure extraction kettle, carrying out pressurized extraction, transferring to a separating funnel, standing for layering, and respectively collecting. And S4, adding water into the lower-layer water phase for dilution, filtering, heating and stirring, standing at low temperature for crystallization, carrying out suction filtration, washing and drying to obtain purified baicalin. And S5, adding ethyl acetate into the upper-layer extraction phase, oscillating and standing, collecting the lower-layer ethyl acetate, adding anhydrous sodium sulfate, filtering, concentrating, adding absolute methanol, standing at low temperature, crystallizing, carrying out suction filtration, washing and drying to obtain purified baicalein. According to the method for extracting and separating the baicalin and the baicalein, the yield and the purity of the baicalin and the baicalein can be improved.

The utility model relates to the technical field of water body detection, in particular to a system for measuring polycyclic aromatic hydrocarbon in water body, which comprises a sampling device, a liquid-liquid extraction purifier and a liquid chromatograph, the sampling device comprises a collecting barrel, a piston rod is connected inside the collecting barrel, a hand wheel is fixedly connected to the top of the piston rod, and the liquid chromatograph is fixedly connected to the top of the piston rod. A collecting head is connected to the lower portion of the collecting cylinder, the liquid chromatograph comprises a chromatograph body, a hydraulic pump, a chromatographic column and a detector are further arranged in the chromatograph body, the liquid-liquid extraction purifier comprises an extraction main machine, a funnel support is arranged above the extraction main machine, and the funnel support is connected with the liquid chromatograph body. A plurality of second liquid storage devices are installed on the funnel support, sample injectors are connected to the upper portions of the second liquid storage devices, separating funnels are connected to the lower portions of the second liquid storage devices, and the whole measuring process ensures the measuring accuracy and reliability.

The utility model relates to the technical field of chemical industry, especially relates to a liquid bromine dropping device, including an isolator, be equipped with operating gloves on the isolator, the top of isolator is equipped with exhaust duct, exhaust duct is connected with waste gas treatment device connection, be equipped with a exchange storehouse in the isolator, still be equipped with a weighing module in the isolator, fixedly connected with a glass separatory funnel on the weighing module, the bottom of glass separatory funnel is equipped with the guide pipe, the guide pipe is linked with reation kettle intercommunication, the device can fast operation, need not consider the pollution to operator, and the convenience is high, and the security is high, and the environment pollution, personnel damage are small.

The present application relates to a kind of polycyclic condensed aromatic hydrocarbon determination method in asphalt and asphaltene-containing petroleum fraction.The method steps are: the sample with weight m1 is removed asphaltene, as intermediate sample, placed in separating funnel F1;DMSO is added in F1, extract is placed in separating funnel F2, raffinate is left in F1;DMSO is added to F1, extract is combined in F2, raffinate is left in F1;Cyclohexane, sodium chloride aqueous solution and alcoholic solvent are added in F2, extract is mixed system F3, raffinate is combined in F1;Cyclohexane is added to F3, extract is placed in container C1, raffinate is combined in F1;Sodium chloride aqueous solution is added to F1, extract is combined in C1;Raffinate is left in F1;Step 7, remove cyclohexane solvent, the weight of remaining substance m2;The ratio of m2 and m1 is calculated, and the content of PCA is obtained.The present application improves analysis accuracy and efficiency.

The invention relates to the technical field of impurities in metal oxides, in particular to a method for detecting impurity elements in tantalum pentoxide, which comprises the following steps: adding quantitative dried tantalum pentoxide powder into a polytetrafluoroethylene digestion bottle; adding hydrofluoric acid and nitric acid, sealing the bottle body, putting the polytetrafluoroethylene digestion bottle into holes of a porous electric heating plate, and carrying out gradient heating to dissolve the tantalum pentoxide powder, so as to obtain a fluorine tantalum salt solution; the fluorine complex tantalum salt solution is transferred into a separating funnel, sulfuric acid is added for oscillation, then an extracting agent is added for oscillation and standing, after complete phase separation, a water phase solution and an organic phase solution are obtained, the water phase solution mainly comprises impurity elements, and the organic phase solution mainly comprises a tantalum matrix; the water-phase solution is collected into a plastic volumetric flask by rotating a cock of the separating funnel; taking a preset amount of water phase solution from the plastic volumetric flask as a to-be-detected sample, and detecting the content of impurity elements in the to-be-detected sample by using an inductively coupled plasma emission spectrometer.

The present invention relates to the technical field of shield tunneling waste measurement, and in particular to a method for identifying and measuring a trace contaminant in shield tunneling waste, comprising the following steps: step S1. pretreating shield tunneling waste; step S2. extracting an anionic surfactant; step S3. removing interfering components; S4. measuring the anionic surfactant; and step S5. calculating the content of the anionic surfactant. In the present invention, fresh shield tunneling waste is directly used for extraction, avoiding anionic surfactant degradation caused by high temperature drying in conventional methods and significantly improving the accuracy of measurement results; in addition, by means of a laboratory shaker, 10-20 samples can be batch-processed at one time, simplifying operation steps, reducing the consumption of a reagent, further effectively avoiding the problem that a separatory funnel is prone to air leakage, improving the operation efficiency and laboratory personnel's safety, and rapidly and efficiently completing extraction of an anionic surfactant in soil. The present invention has wide prospects for application.

The invention provides a separating funnel oscillator, and relates to the technical field of oscillators, the separating funnel oscillator comprises a base, two sides of the top of the base are provided with groove structures, and the top of each groove structure is fixedly provided with a detection electrode; the control bin is fixedly arranged in the middle of the top of the base; the number of the side rotating plates is two, and the two sets of side rotating plates are arranged on the two sides of the control bin in a hinged mode; an oscillator is arranged, the rapid and automatic locking function is provided, an air telescopic rod E is driven to contract through the weight of a funnel, air in the air telescopic rod E is input into an air telescopic rod C and an air telescopic rod D, side clamping blocks on the two sides are expanded, a built-in valve block is matched with spring rods to rebound, the air telescopic rod C and the air telescopic rod D are not communicated with the air telescopic rod E, and the air telescopic rod E is driven to retract; the funnel can be fixed by keeping the orientation of the pneumatic telescopic rod C and the pneumatic telescopic rod D, control and operation are convenient, and the problem that an existing oscillator lacks a rapid automatic locking function is solved.

The utility model relates to the technical field of micro-channel continuous flow reactors, in particular to a simple scale receiving divider for a micro-channel reactor. According to the technical scheme, the device comprises a base, a support is fixedly installed at the top of the base, a clamping frame is fixedly installed on the support, two separating funnels are clamped and fixed to the clamping frame, a communicating pipe is jointly clamped and inserted between the two separating funnels, a three-way valve is clamped and inserted at the top ends of the separating funnels, and a nitrogen ball connecting pipe is arranged on the three-way valve; a receiving bottle is arranged below the separating funnel, a drain valve is fixedly installed at the bottom end of the separating funnel, and a pipe opening in the bottom end of the drain valve is inserted into a bottle opening of the receiving bottle and makes close contact with the bottle opening. According to the device, an oxygen-free environment is provided for the separating funnels through the nitrogen ball, liquid can be added into the two separating funnels through the communicating pipe, the receiving bottle does not need to be replaced, an extracting solution is conveniently received, the problem that the extracting solution is wasted due to replacement of the receiving bottle is solved, and loss is effectively reduced.

The application belongs to the field of medical silicone pressure-sensitive adhesive preparation, and particularly relates to a kind of medical silicone pressure-sensitive adhesive MQ silicone resin and its preparation method, comprising the following steps: mixing catalyst, deionized water, solvent I, adding into a reaction vessel, and stirring in advance;Adding component A, and reacting;When the temperature in the reaction vessel does not change, continue to stir;Adding component B and solvent II, increasing the temperature, and keeping the temperature to continue the reaction, after the reaction, quickly reduce to room temperature, and add extractant;Pour the reaction liquid after the reaction into a separatory funnel, then discharge the acid liquid, add baking soda to adjust pH, so that the pH is adjusted to neutral;Add anhydrous magnesium sulfate and activated carbon, and carry out water absorption, decolorization and odor absorption, then place in a vacuum drying oven to remove the solvent, and the MQ silicone resin is obtained.The MQ silicone resin prepared by the application can not only improve the initial adhesion of the silicone resin, but also has good holding adhesion for the prepared pressure-sensitive adhesive product.

The utility model relates to the field of chemical reagent separation devices, in particular to a cleaning structure of a chemical reagent separation device, and aims to solve the technical problems that an existing liquid separation device is not provided with a cleaning structure, and a liquid separation container needs to be detached when the liquid separation container is cleaned. According to the technical scheme, the cleaning structure of the chemical reagent separating device comprises a supporting base, a separating funnel, a cleaning assembly, a lifting assembly and a waste liquid collecting assembly; according to the chemical reagent liquid separating device, the cleaning assembly which sprays a high-pressure water column to impact the inner wall of the liquid separating funnel so as to achieve the effect of cleaning residual solution on the inner wall of the liquid separating funnel and the waste liquid collecting assembly which can collect cleaning waste liquid are additionally arranged on the chemical reagent liquid separating device; by means of the design, an experimenter can clean and air the separating funnel without taking down the separating funnel from the supporting base, and the problems that an existing liquid separating device is not provided with a cleaning structure, and a liquid separating container needs to be detached when the liquid separating container is cleaned are solved.

The invention belongs to the field of spent fuel post-treatment, and relates to a neptunium post-treatment salt-free valence adjustment method. The method comprises the following steps: 1, introducing ozone A with a certain concentration into a reactor C containing a solution B, reacting for a period of time to obtain a valence-adjusted solution R, sampling and analyzing the concentration of hexavalent Np, and calculating the oxidation rate of ozone to Np; and 2, mixing the solution R and an extraction agent D in a separating funnel according to a certain ratio, standing for layering for a period of time after short oscillation, separating to obtain upper-layer organic phase feed liquid and lower-layer water phase feed liquid, pre-treating, determining the Np concentration of the organic phase and the water phase by adopting an ICP-MS mass spectrometer, and calculating the Np extraction rate. By adopting the method, pentavalent Np can be stably and efficiently oxidized to hexavalent Np, meanwhile, the salt content of the process can be reduced, equipment and pipeline blockage is avoided, and the extraction rate of Np reaches 99% or above.

The application relates to the technical field of separatory funnels, in particular to a sealing structure of a separatory funnel piston. A piston rod is arranged in a separation pipe of a funnel bottle body, one end of the piston rod is sealed and combined with the end face of the separation pipe, a connecting end is formed at the end of the piston rod penetrating through the separation pipe, a step is formed at the connecting position between the piston rod and the connecting end, a sealing assembly is sleeved on the connecting end, a locking piece is installed at the connecting end, the sealing assembly is tightly combined with the end face of the separation pipe and the end face of the step through the locking piece, the gap between the separation pipe and the piston rod is sealed, the problem that solution leakage is caused by piston rod loosening during the test process is avoided, the sealing effect is improved, and the stability of the separatory funnel sealing is ensured.

The invention belongs to the field of resin processing and manufacturing, and particularly relates to MDT type phenyl hydrogen-containing silicon resin and a preparation method thereof. The preparation process of the MDT type phenyl hydrogen-containing silicon resin comprises the following steps: simultaneously hydrolyzing various phenyl alkoxy silanes under acidic and low-temperature conditions, further performing high-temperature condensation under a heating condition, performing liquid separation through a separating funnel to obtain an organic phase and a water phase, neutralizing the organic phase by water washing, and removing water to obtain transparent liquid, thereby obtaining the MDT type phenyl hydrogen-containing silicon resin. And finally, carrying out reduced pressure desorption on the transparent liquid to obtain the MDT type phenyl hydrogen-containing silicon resin with excellent performance. The MDT type phenyl hydrogen-containing silicon resin provided by the invention is mild in synthesis condition, simple in operation process, less in wastewater generated during neutralization treatment, recyclable in solvent and relatively high in large-scale production operability.

The present disclosure relates to the technical field of shield muck detection, specifically relating to a method for identifying and detecting trace pollutants in shield muck, including the following steps: Step S1. pre-treating shield muck; Step S2. extracting anionic surfactant; Step S3. removing interfering components; Step S4. detecting anionic surfactant; Step S5. calculating anionic surfactant content. The present disclosure directly uses fresh shield muck for extraction, avoiding the decomposition phenomenon of anionic surfactants caused by high-temperature drying in traditional methods, significantly improving the accuracy of detection results, and utilizing a laboratory oscillator to batch process 10-20 samples at once, simplifying operation steps, while reducing reagent consumption, and effectively avoiding the problem of gas leakage in separatory funnels, improving operational efficiency and safety of experimenters, enabling rapid and efficient completion of extraction of anionic surfactants in soil, having broad application prospects.

The utility model relates to the technical field of separating funnel devices, in particular to a pear-shaped glass separating funnel device with a stirring function, which comprises a base, four brake universal wheels are fixedly connected to one side of the base, and a fixing frame is fixedly connected to one side of the base; the pear-shaped liquid separating funnel device has the advantages that by arranging the stirring mechanism, the extraction work can be completed in the pear-shaped liquid separating funnel device, so that liquid-liquid or solid-liquid mixed liquid is stirred and extracted more fully; the problem that after extraction work is completed, mixed liquid extracted in other devices needs to be manually transferred into the pear-shaped separating funnel device is solved, the working efficiency of the separating funnel device is improved, the detachable glass cover is arranged, cleaning work after extraction and liquid separation can be easily completed, and the working efficiency of the separating funnel device is improved. Openings with different purposes are additionally formed in the detachable glass cover, so that the practical performance of the separating funnel device can be improved.

The utility model belongs to chemical device technical field, multi -functional solid -liquid reaction gas -making device, including base, reaction generator, gas collecting bottle and collector, base provides support, reaction generator realizes the inclination adjustment through pivot and rotation switch, the inside porous baffle separates solid -liquid, separates liquid funnel and injects liquid reagent, the solid -liquid contact reaction when tilting, gas is led out through gas guide cover, gas outlet pipe, adjustable tee -shaped valve switches gas path to first gas outlet duct or second gas outlet duct, the gas collecting bottle in the collector is fixed by baffle, the embedded sink is communicated with the collector through the drain, and the water storage is adjusted s box adjusts water volume, and the pressurizing device assists drainage method gas collection. When using, to reaction generator solid, separates liquid funnel and adds liquid, and starts the reaction when tilting, and adjusts tee -shaped valve to make gas into gas collecting bottle, and covers gas collecting bottle screw jar cover after verifying full, and the reaction generator is made to separate solid -liquid and stop reaction in reverse inclination, and completes gas -making and collection.

The application provides a method for extracting and separating tantalum and niobium, and relates to the technical field of tailing treatment.The method comprises the following steps: step A1, a proper amount of oxalic acid is weighed and dissolved in deionized water, and after dissolving, the oxalic acid solution with a certain concentration is prepared by transferring into a volumetric flask; step A2, a certain amount of tantalum standard solution and niobium standard solution are respectively taken and added into the prepared oxalic acid solution; step A3, hydrochloric acid solution is added to adjust PH; step A4, a proper amount of DOAP is weighed and added into chloroform, and after being fully stirred and dissolved, the DOAP chloroform solution is prepared; step A5, the water phase and the organic phase are respectively measured by using a pipette, and are added into a separatory funnel according to a certain volume ratio; and step A6, the separatory funnel is placed in a constant-temperature oscillator to oscillate, so that the two phases are fully contacted. The scheme finally realizes the process of simplifying the extraction and separation of tantalum and niobium, reduces the cost, and improves the recovery rate.

This application discloses a separating funnel. The separating funnel includes a lower platform end with a first through-hole in the center. The inlet end of a three-way separating assembly is detachably connected to the platform end to connect the three-way separating assembly to the first through-hole. A sealing cap is detachably connected to the platform end to seal the first through-hole after the three-way separating assembly is separated from the platform end. The bottom of the platform end has a support portion configured to support the bottle body after the platform end and the three-way separating assembly are separated, and / or, the support portion is configured to support the bottle body when the platform end and the sealing cap are connected. The separating funnel has functions such as liquid separation, reaction rate control, extraction, and purification. Furthermore, the bottle body can be used as a measuring cylinder, vacuum filtration flask, reagent bottle, etc. The separating funnel has at least two uses, solving the problem of single-use of the separating funnel and improving its utilization rate.

The invention relates to the technical field of cannabidiol derivatives, and discloses a cannabidiol amino acid derivative and a preparation method and application thereof.The preparation method comprises the steps that in the inert atmosphere, cannabidiol and a dichloromethane solvent are mixed, DMAP and EDCI are added after the cannabidiol is completely dissolved, stirring is conducted for 10 min, an amino acid compound is added, stirring reaction is continuously conducted for 24 h at the room temperature, and the cannabidiol amino acid derivative is obtained; pouring the reaction liquid into a separating funnel, performing liquid extraction by using dichloromethane and water, retaining an organic phase, washing with water, then drying and filtering the organic phase by using anhydrous sodium sulfate, concentrating the filtrate under reduced pressure to constant weight to obtain a reaction crude product, and finally separating and purifying the reaction crude product by using silica gel column chromatography. The whole synthesis steps are simple, and the prepared cannabidiol amino acid derivative has the effects of remarkably inhibiting the activity of tyrosinase and cholinesterase and also has a certain nerve protection effect.

Provided is a method for preparing a modified carboxymethyl chitosan, including the following steps: (1), weighing and adding a quality of chitosan to isopropanol (IA), subjecting a resulting mixture to swelling by stirring at room temperature for a period of time to obtain a swollen suspension; (2), subjecting the swollen suspension to alkalization at room temperature by adding a 40% NaOH solution to the swollen suspension; (3), heating a resulting alkalinized mixture by raising a temperature of a water bath to 60° C., and then slowly adding dropwise an isopropanol-chloroacetic acid (IA-MCA) mixture using a separatory funnel, subjecting an obtained mixture to reaction; and after the reaction is completed, adjusting a pH value of an obtained reaction product to about 7.0 using glacial acetic acid.

This invention relates to the field of biomedical experimental equipment technology, and particularly to a vibrating container and an organic extraction device for organic matter extraction. The vibrating container comprises: an outer cup, an inner bottle, a flow channel, a flow path, and a filter screen. The outer cup is a transparent beaker-shaped container. The inner bottle is fixedly mounted on the bottom wall of the inner cavity of the outer cup, and the distance between the side wall of the inner bottle and the vertical wall of the inner cavity of the outer cup is greater than zero. The flow channel is located at the top opening of the outer cup. The flow path is located within the inner wall of the inner bottle, with the inlet port exposed on the surface of the inner wall and the outlet port exposed on the outer surface of the inner bottle. The outlet port is located within the inner cavity of the outer cup. The filter screen is located at the inlet port of the flow path. This invention solves the problem of contamination of residual reagents in the separatory funnel during quantitative extraction of solvent in existing technologies, and is convenient to use.

The utility model relates to the technical field of extraction devices, in particular to an extraction device for cosmetic detection pretreatment. According to the technical scheme, the device comprises a base and a separating funnel, the separating funnel is arranged at one end of the top surface of the base, a vertical base is fixed to the other end of the top surface of the base, a buffer is connected to the side face of the vertical base, a first flat plate is connected to one end of the buffer, an electric rotating disc is arranged in the middle of one side of the first flat plate, and a second flat plate is connected to the surface of the electric rotating disc. According to the utility model, the separating funnels with different sizes are clamped and fixed by utilizing the clamping frames capable of moving oppositely, and the clamped separating funnels can be rotationally and obliquely placed through the electric turntable, so that two solvents in the separating funnels can be better fused and layered by virtue of the oblique placement; in addition, the obliquely arranged separating funnel vibrates and shakes through the cooperation of a vibration motor and a buffer, and the mixing uniformity of the solvent is further improved through moderate vibration and shaking, so that the extraction effect is optimized.