129 results about "Separatory funnel" patented technology

The invention discloses an egg yolk lecithin separation and extraction device and a technology thereof, and relates to the technical field of separation and extraction, the egg yolk lecithin separation and extraction device comprises: a stirring barrel, the stirring barrel is arranged on the ground; the feeding hole is fixedly formed in the top of the stirring barrel; the solvent tank is fixedly mounted at the top of the stirring barrel, and a chloroform solution is arranged in the solvent tank; the separating funnel is fixedly mounted at the bottom of the stirring barrel, and the separating funnel is used for separating an egg phosphorus solvent from a water phase; the motor is fixedly mounted at the top of the stirring barrel; the stirring rod is fixedly mounted at the output end of the motor, and a reciprocating spiral groove is formed in the surface of the stirring rod; the stirring plate is fixedly mounted at the bottom of the stirring rod; the elastic telescopic rod enables egg yolk and chloroform on the sliding plate to be mixed more sufficiently through up-down movement of the sliding plate.

The invention discloses a method for preparing 1, 2, 3-trichloropropene with high selectivity by dehydrochlorination of 1, 2, 2, 3-tetrachloropropane, and belongs to the technical field of catalysis. The method comprises the following steps: stirring 1, 2, 2, 3-tetrachloropropane and a sodium hydroxide solution under the conditions of normal pressure and 40-100 DEG C for reflux reaction, after the reaction is finished, cooling the reaction liquid to room temperature, separating the liquid by using a separating funnel, rectifying the obtained oil phase to obtain 1, 2, 3-trichloropropene, adding an improver into the reaction system, and carrying out solid-liquid separation to obtain the 1, 2, 3-trichloropropene. The improver is a complex system composed of a metal salt and a bidentate phosphine ligand or a metal composite oxide. The method provided by the invention has the advantages of fewer reaction steps and simpler equipment, the yield of 1, 2, 3-trichloropropene is as high as 86%, the conversion rate of 1, 2, 2, 3-tetrachloropropane is as high as 92%, the selectivity of the target product is as high as 98%, and the conversion rate and the selectivity of the target product are remarkably improved.

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 relates to the technical field of shield muck detection, in particular to a method for identifying and detecting trace pollutants in shield muck, which comprises the following steps: S1, pretreating shield muck, and extracting an anionic surfactant; s2, avoiding interference components; s3, detecting an anionic surfactant; and S4, calculating the content of the anionic surfactant. According to the method, the fresh shield muck is directly adopted for extraction, the phenomenon that in a traditional method, an anionic surfactant is decomposed due to high-temperature drying is avoided, the accuracy of a detection result is remarkably improved, 10-20 samples can be treated in batches at a time through a laboratory oscillator, the operation steps are simplified, meanwhile, the reagent consumption is reduced, and the cost is reduced. The problem that the separating funnel is easy to leak air is effectively avoided, the operation efficiency and the safety of experimenters are improved, the extraction of the anionic surfactant in the soil can be quickly and efficiently completed, and the device has a wide application prospect.

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 invention provides a preparation method for preparing dibutyltin dilaurate through a solvent-free method, and relates to the technical field of chemical engineering. According to the preparation method of dibutyltin dilaurate, a predetermined amount of coconut oil acid and dibutyltin dichloride are obtained, the uniformity of a mixture is kept through stirring equipment, and sufficient contact of reactants is ensured; in the process of dropwise adding the sodium hydroxide solution, the reaction temperature is kept stable through a temperature control device; after the pH value is adjusted, separating out lower-layer saline water by using a separating funnel, and adjusting the separation speed and efficiency by controlling a valve to ensure thorough separation; obtaining a separated product, and heating the product in a vacuum environment; and after drying, filtering the product to obtain the final dibutyltin dilaurate. Dibutyltin dichloride and alkali liquor are used. The dibutyltin dichloride is liquid and is simple, convenient and safe to use, redundant solvents are not needed in the reaction process, safety and environmental protection are guaranteed, the dibutyltin dichloride is directly used as the raw material in the process, one-step reaction is achieved, and efficiency is improved.

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 invention provides a method for detecting the content of karanal in water based on gas chromatography-mass spectrometry, which comprises the following steps: sample pretreatment, sample detection, establishment of a standard curve linear equation and result calculation, and the sample pretreatment comprises the following steps: A, transferring a water sample to a separating funnel, adding an extracting agent, oscillating for 8-12 minutes, standing for 2-4 minutes for layering, and collecting a sample; collecting extract liquor, repeatedly extracting for 2-4 times, and combining the extract liquor; and B, dehydrating the extract by using a dehydrating agent, carrying out nitrogen blowing concentration, fixing the volume to 0.5-2.0 mL by using a solvent, and detecting by using a gas chromatography-mass spectrometer. The gas chromatography-mass spectrometry for detecting the content of the carrageenan aldehyde in the water is provided by taking a water sample as a detection matrix, has the advantages of short pretreatment time, high efficiency and good method stability, and can meet the detection requirements of the carrageenan aldehyde in the water sample.

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 present invention relates to the technical field of shield muck detection, and particularly relates to a method for identifying and detecting trace pollutants in shield muck, which comprises the following steps: Step S1. Pretreatment of shield muck, extraction with an anionic surfactant; Step S2. Avoidance of interfering components; Step S3. Detection of an anionic surfactant; Step S4. Calculation of the content of an anionic surfactant. The present invention directly uses fresh shield muck for extraction, avoiding the decomposition of anionic surfactants caused by high-temperature drying in traditional methods, significantly improving the accuracy of detection results. Moreover, by using a laboratory oscillator, 10-20 samples can be processed in batches at one time, simplifying the operation steps, reducing the consumption of reagents at the same time, effectively avoiding the problem of easy air leakage of separating funnels, improving the operation efficiency and the safety of experimental personnel, and can quickly and efficiently complete the extraction of anionic surfactants in soil, having broad application prospects.

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 utility model discloses a reflux ratio controller which comprises a cylinder body, a liquid-phase inlet, a liquid-phase outlet and a reflux inlet, a liquid-phase inlet, a liquid-phase outlet and a reflux inlet are formed in the cylinder body, and a cavity is formed in the cylinder body; the electromagnet is installed on the outer side wall of the cylinder body, the separating funnel is arranged in the cavity, the separating funnel is rotationally connected with the inner wall of the cylinder body, the rotating axis and the central axis of the separating funnel are arranged at intervals, the separating funnel is provided with a first position and a second position, an armature is installed on the separating funnel, and the armature is connected with the electromagnet. And after the electromagnet is electrified, the separating funnel rotates from the first position to the second position. The utility model solves the problems in the background art that a three-way automatic control valve cannot meet the switching requirement due to the high switching speed required by fine chemical engineering, and a funnel type backflow device possibly causes funnel switching deviation under the strong scouring of materials.

The invention relates to the technical field of preparation of functional active substances as by-products of aquatic products, in particular to a method for preparing squalene from livers of cultured takifugu obscurus, which comprises the following steps: preparing liver oil: taking out the livers from the cultured takifugu obscurus, adding n-hexane, n-heptane, petroleum ether or diethyl ether-water mixed liquor, homogenizing, ultrasonically extracting, centrifuging, and filtering to obtain the liver oil; filtering to prepare the liver oil for breeding the Takifugu obscurus; saponification: adding sodium hydroxide-ethanol into the liver oil of the cultured Takifugu obscurus, and refluxing in a water bath; extraction: transferring the saponified liquid into a separating funnel, and adding normal hexane, normal heptane or cyclohexane for extraction; and purification: dissolving the collected sample in dichloromethane, passing through a silica gel column for chromatographic purification, and collecting a fraction containing the squalene component. The method disclosed by the invention has the advantages of simple process, convenience in operation, high extraction efficiency and high product purity, and is a method for obtaining high-purity squalene by fully utilizing the processing value of the by-product liver of the cultured Takifugu obscurus.

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 discloses a sample preparation device for quantitative detection. The sample preparation device for quantitative detection comprises a quantitative bottle and a sealing assembly, the quantitative bottle comprises a bottle opening and a bottle body; the sealing assembly comprises a connector, a main body and a liquid outlet pipe; the connector, the main body and the liquid outlet pipe are connected into a whole; the connecting opening is detachably connected with the bottle opening in a sealing manner; an air vent is formed in the main body, a constant-pressure pipe is arranged in the direction from the air vent to the connecting port in an extending mode, and the constant-pressure pipe penetrates through the connecting port; the sealing assembly further comprises a sealing piece used for sealing the ventilation opening. And a liquid outlet valve is arranged on the liquid outlet pipe. The sample preparation device for quantitative detection has the effects of quantifying the volume of the solution, the reaction bottle and the separating funnel, and can be suitable for preparing various to-be-detected solutions for quantitative detection. The accuracy and precision of the test result are ensured, the preparation steps of the to-be-detected liquid are simplified, and the detection cost is reduced.

The utility model is applicable to the technical field of urine detection, and provides a urine pretreatment device for Orbitrap GC 240, including a treatment tank, the top of which is hollow and provided with a cover plate, the cover plate is slidably connected to the top inner wall of the treatment tank, vertical rods are symmetrically provided on both sides of the bottom surface of the cover plate, and slots adapted to the vertical rods are symmetrically provided on both sides of the top inner wall of the treatment tank, a spring is provided between the inner bottom surface of the slot and the bottom surface of the vertical rod, two separating funnels are penetrated on the top surface of the cover plate, a through slot is provided on the top surface of the cover plate between the two separating funnels, a tube is provided on the inner bottom surface of the treatment tank, and a rubber tube is connected to the bottom surface liquid outlets of the two separating funnels. This solution can simultaneously perform extraction processing of multiple groups of urine samples, and the rubber tube and the tube cooperate with each other to perform subpackaging, which greatly facilitates use and improves efficiency.

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 invention belongs to the field of metallurgical analysis, and relates to a method for detecting the content of sodium stearate in an oxide remover for a hot-rolled steel pipe, which comprises the following steps: placing the oxide remover in deionized water, uniformly mixing, then dropwise adding an acid solution, heating to boil, controlling the pH value to be 2-4, keeping stirring, and reacting to obtain a sample solution; cooling the sample solution to room temperature, adding an organic solvent, keeping stirring, and filtering insoluble substances to obtain filtrate; and pouring the filtrate into a separating funnel, vigorously oscillating, standing, transferring an organic phase into a weighed distillation flask, distilling to obtain stearic acid, and calculating to obtain the content of sodium stearate. The method for measuring the content of sodium stearate in the oxide removing agent has relatively high accuracy and precision.

The utility model provides simple oil-water separation equipment, belongs to the technical field of chemical experiment equipment, and aims to solve the problem that the conventional separating funnel is manually embedded into a bracket by an operator, so that the self posture of the separating funnel is very easy to incline. The funnel main body is arranged in the placing ring; the right end of the sliding part is connected to the outer side of the connecting rod in a sliding manner; the C-shaped clamp is fixedly connected to the left side of the sliding part; the horizontal calibration assembly is arranged at the top of the funnel main body and in the [-shaped clamp; and the anti-displacement assembly is arranged behind the [-shaped clamp. According to the utility model, the funnel main body can be placed in the placing ring in a vertical and horizontal posture through the up-down movement of the limiting block, and the limiting block and the sealing plug are separable, so that the funnel main body can be conveniently matched to uniformly shake oil and water at the initial stage and subsequently adjust the posture of the funnel main body.

The present invention relates to a vacuum pressure infiltration polymer / glass-ceramic composite material, its preparation method and application, belonging to the technical field of composite material preparation. The preparation method of the present invention has the following characteristics during the process: (1) Adding a pore-forming agent to form pores and adopting a two-step sintering method (pre-sintering and calcination) of pre-sintering first, then forming and finally sintering to prepare porous glass-ceramics; (2) Using a simple and efficient vacuum / pressure infiltration device and infiltration method to prepare glass-ceramic / polymer composites. The separating funnel, suction bottle and vacuum pump in the infiltration device construct a vacuum system. First, make the porous structure of the glass-ceramics reach a vacuum state, absorb the monomer solution into the pores through the capillary force, and then press the monomer solution into the pores of the glass-ceramics through the pressurization of the load-bearing syringe; the vacuum / pressure infiltration improves the infiltration effect through the strictly procedural conversion of the infiltration liquid pressure.

The application belongs to the technical field of organic synthesis, and particularly relates to a method for synthesizing L-ascorbyl palmitate by an acyl chloride method. The method comprises the following steps: (1) adding palmitic acid into a mixed solvent, adding SOCl2 dropwise, performing acyl chloride reaction, continuously adding L-ascorbic acid after the reaction is completed, heating and keeping the temperature to perform reaction, and obtaining a reaction product; (2) adding ethyl acetate and distilled water into the reaction product, placing the reaction product into a separating funnel, obtaining a water layer and an organic layer, re-extracting the water layer with ethyl acetate once, and combining the organic layers obtained twice; washing the organic layer with water three times, then drying the organic layer with anhydrous Na2SO4, removing the organic solvent by rotary evaporation, and obtaining a crude product; (3) purifying the crude product by using a silica gel chromatography column, collecting eluent within 60-150 min, and performing rotary evaporation on the eluent, and obtaining L-ascorbyl palmitate. The method has high yield and purity for preparing L-ascorbyl palmitate.

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 invention belongs to the technical field of organic synthesis, and particularly relates to a method for synthesizing L-ascorbyl palmitate by an acyl chloride method. The method comprises the following steps: (1) adding palmitic acid into a mixed solvent, dropwise adding SOCl2, carrying out an acylating chlorination reaction, continuously adding L-ascorbic acid after the reaction is finished, and carrying out heating and heat preservation reaction to obtain a reaction product; (2) adding ethyl acetate and distilled water into the reaction product, putting into a separating funnel to obtain a water layer and an organic layer, extracting the water layer once by using ethyl acetate, and combining the organic layers obtained by two times; washing an organic layer with water for 3 times, then drying with anhydrous Na2SO4, and carrying out rotary evaporation to remove the organic solvent to obtain a crude product; and (3) purifying the crude product by using a silica gel chromatographic column, collecting eluent within 60-150 minutes, and performing rotary evaporation on the eluent to obtain the L-ascorbyl palmitate. The L-ascorbyl palmitate prepared by the method disclosed by the invention is high in yield and purity.

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.