583results about How to "Improve separation rate" patented technology

The invention relates to a clean process method for extracting vanadium, chromium and iron from vanadium slag step by step. The clean process method comprises the following steps of: selectively oxidizing the vanadium slag to obtain a roasted product; leaching the obtained roasted product by using a leaching agent to extract vanadium, carrying out liquid-solid separation to obtain vanadium-containing leach liquor and vanadium-extracted tailings, and carrying out product transformation on the vanadium-containing leach liquor to prepare vanadium series products; adding the obtained vanadium-extracted tailings and a silicon fixing agent to a sodium hydroxide solution, selectively fixing silicon, then oxidizing to extract chromium, then carrying out liquid-solid separation to obtain chromium-containing leach liquor and chromium-extracted tailings, and carrying out product transformation on the chromium-containing leach liquor to prepare chromium series products; mixing the chromium-extracted tailings with a reducing agent, and carrying out magnetizing roasting and magnetic separation to obtain silicon slag and ion concentrate powder / iron-enriched slag / reduced iron powder. The clean process method disclosed by the invention realizes the step-by-step extraction and high-efficiency separation of valuable components such as vanadium, chromium and iron which are contained in the vanadium slag, prevents the mutual entrainment of vanadium, chromium and iron products; in addition, the clean process method disclosed by the invention realizes the near zero discharge of waste water and the recycling of final slag and is clean and pollution-free.

The invention relates to a staged packaging type potato combine harvester. The harvester comprises a rack (13); a roll shaft chain type staging device (35), a first stage soil and potato separation and conveying device (34) and a second stage soil and potato separation and conveying device (12) are arranged on the rack (13); ground wheels (11) are arranged at the lower part of the rack (13); a belt scraper type lifting elevator (16) is arranged on one side; a material receiving and packaging device (22) is arranged on the roll shaft chain type staging device (35); a transverse chain rod type conveyor (17) is arranged at the back end of the second stage soil and potato separation and conveying device (12); an elastic stripper rod pick-roll type two-stage stalk separation device and rubber belt type two-stage stalk separation device are further arranged between the first stage soil and potato separation and conveying device (34) and the second stage soil and potato separation and conveying device (12); a digging shovel frame (3) and the rack (13) are articulated through a traction rod (31); a copying soil breaking roll (1), a soil cutting disk (2), a digging shovel (32) and a soil loosening transition tooth (4) are arranged on the digging shovel frame (3); and the upper part of the digging shovel frame (3) is connected with a lifting rod of a lifting cylinder (29). The harvester is in tractor traction type and can complete the procedures of digging of potato crops, soil and potato separation, separation of stalk, weeds and a ground film, conveying and lifting of potatoes, staging of potatoes, collection, packaging and the like of potato crops.

A hydrogen generator for apparatus for use in an internal combustion engine of a vehicle for increasing the efficiency of the engine and decreasing emissions from the engine has stainless-steel electrolysis plates that are close-spaced in the generator housing. The hydrogen unit is configured to inject hydrogen after the throttle body and the carburetor using a spacer located between the intake manifold and the throttle body or carburetor. Alternative, a modified spark plug equipped with a tube and a check valve is mounted on the engine, while being controlled by the generator's PCB controller. The PCB controller is configured to control a variety of operational control devices, including a gas level controller, a liquid level controller, a temperature controller, a pressure controller, a flow rate controller, a current controller a tachometer controller, a pressure sensor configured to detect gas pressure in the housing, a liquid sensor configured to detect level of aqueous solution in the housing, and a temperature sensor. The operational conditions of the hydrogen generator can be controlled from a cab of the vehicle.

The invention provides a gas and oil separator with good applicability and good gas and oil separating effect. The gas and oil separator comprises an air inlet, an air inlet passage communicated with the air inlet, a gas and oil separating cavity, an air outlet passage and an air outlet, wherein the air inlet passage and the gas and oil separating cavity are separated by a clapboard with a through hole; a baffle plate is arranged in the gas and oil separating cavity, is positioned behind the clapboard and faces the through hole of the clapboard; the gas and oil separating cavity is communicated with the air outlet passage below the gas and oil separating cavity through a cylinder in which a spiral air passage is formed; the cylinder is vertically arranged behind the baffle plate; an oil return groove is reserved at the bottom of the air outlet passage; a through hole communicated with the oil return groove is reserved on a gas and oil separating cavity bottom plate; and the air outlet passage is communicated with the air outlet through a PCV valve. Two types of gas and oil separating devices are arranged in the gas and oil separator and sequentially act to separate the gas and oil of the gas and oil separator for two times, so that the problem of poor effect of one-time separation of the traditional gas and oil separator is solved and the gas and oil separating effect is better.

As one example, a fuel rail assembly for supplying pressurized fuel to a plurality of cylinders of an engine is provided. The fuel rail assembly includes a fuel rail housing defining an internal fuel rail volume having at least a first region and a second region; a fuel separation membrane element disposed within the fuel rail housing that segregates the first region from the second region. The membrane element can be configured to pass a first component of a fuel mixture such as an alcohol through the membrane element from the first region to the second region at a higher rate than a second component of the fuel mixture such as a hydrocarbon. The separated alcohol and hydrocarbon components can be provided to the engine in varying relative amounts based on operating conditions.

The invention discloses a peel-pith-leaf separator of a maize straw. The separator comprises a rack (13) and a power mechanism (12) arranged on the rack and is characterized in that a guiding conveying mechanism, a leaf removing mechanism, a peel-stripping mechanism and an output mechanism are arranged on the rack (13) from front to back and are all in transmission connection with the power mechanism (12). The separator disclosed by the invention specially aims at leaf-removing and pith-stripping works so as to realize the function of peel-pith-leaf thorough separation, and further the peel, the pith and the leaf of the maize straw can be respectively and effectively utilized; besides, the separator disclosed by the invention has the advantages of small mechanical vibration, low noise, less energy consumption, strong practicability, good market prospect and worthy of popularization and application.

The invention relates to a preparation method of a rare-earth element doped modified hollow microsphere bismuth oxyiodide photocatalyst. The preparation method comprises the following steps: adding bismuth nitrate pentahydrate and nitrate of a rare-earth element into a solvent and sufficiently dissolving to obtain a bismuth nitrate solution containing the rare-earth element; under magnetic stirring, dropwise adding a potassium iodide solution at a uniform speed drop by drop; after finishing dropwise adding, continually carrying out the magnetic stirring to obtain a precursor solution; puttingthe precursor solution into a reaction kettle to react by adopting a solvothermal method; after finishing the reaction, cooling a product to room temperature and taking out the product; washing, drying in vacuum and grinding to obtain the rare-earth element doped modified hollow microsphere bismuth oxyiodide photocatalyst. The method provided by the invention is simple and feasible and has the characteristics of simple process, good experiment reproducibility, low production cost and the like; the prepared rare-earth element doped composite photocatalyst has good photocatalytic degradation performance on organic pollutant and a good application prospect.

The invention discloses a method for recovering an electrolyte in a waste lithium ion battery. The method comprises the steps that the single cell of the waste lithium ion battery after discharging isdisassembled; thermal cracking treatment is carried out at 300 to 500 DEG C, wherein the pyrolysis time is 0.5 to 1.5h; the solid material after thermal cracking is pulverized, sorted and recovered to acquire an electrode material, iron, aluminum and copper powder; the thermally cracked gas is first dedusted and then condensed to recover the condensed electrolyte; and the condensed gas is discharged after being leached with an alkaline solution. According to the method provided by the invention, the electrolyte is recovered, and the fluorine content of the discharged gas is reduced to below the emission standard to meet the requirement of environmental protection treatment.

The invention discloses a method for recycling Co3O4 from a positive electrode material of a waste lithium cobalt oxide battery. By means of an organic acid leaching method, the positive electrode material of the waste lithium cobalt oxide battery is obtained through separation, operation is simple, and the separation rate reaches more than 98%. Meanwhile, in the leaching process, the pollution to the environment is reduced by selecting organic acid. Zero pollution to the environment is achieved in the process of obtaining Co3O4 through spraying sintering, and operation is simple and feasible. An obtained product is stable in chemical property, the material performance is superior, and the product can serve as an electronic material and can also be widely applied to catalysts and oxidizing agents and applied to manufacturing cobalt salt, enamel pigment and the like.

A method of operating a membrane separation module is provided that includes the steps of directing a feed stream comprising a first component into the membrane separation module to separate the first component by permeating it across a membrane; and introducing a second component into the feed stream such that the second component has a higher permeability through said membrane than the permeability of the first component through said membrane.

The invention relates to a method for extracting gold, silver, platinum and palladium from electronic waste and belongs to the field of resource utilization of the waste. The method comprises the following steps: gathering metals by using pretreatment, carrying out acid pickling and gathering precious metals, leaching the precious metals by using high-pressure chlorine gas, leaching gold, platinum and palladium for one step, extracting, separating and extracting gold, carrying out chemical precipitation, separating and extracting platinum and palladium, and extracting silver by using an ammoniation method. Through the method for extracting gold, silver, platinum and palladium from the electronic waste, the resource utilization of the electronic waste can be implemented; the extraction of gold, silver, platinum and palladium in the electronic waste can be implemented; the gold, silver, platinum and palladium are high in recovery rate, low in cost, short in process, few in environment hazards and low in yield of waste water and waste gas.

The invention discloses a crop seed screening device. The crop seed screening device comprises a box. The box is erected above a screening pond. A hopper is arranged on the upper portion of the box. One side of the box is provided with a connecting pipe and a lower outlet. The other side of the box is provided with a slag discharging port. An upper screening plate, an upper guiding plate, a lower screening plate and a lower guiding plate are arranged in the box from top to bottom. A baffle is arranged between the lower screening plate and the bottom surface of the box. An upper vibrating motor and a lower vibrating motor are installed on the upper screening plate and the lower screening plate respectively. Both the upper screening plate and the lower screening plate are arranged obliquely. The upper screening plate and the lower screening plate are each provided with a plurality of screening holes. According to the crop seed screening device, through the arrangement of the box and the screening pond, seeds in unqualified sizes are separated in the box by means of a vibrating screen, and then imperfect seeds and husks are separated from intact seeds through the screening pond; the structure is simple, using is convenient, and the seed separation rate is greatly increased; in this way, the screening speed is increased, and the planting success rate of screened seeds is increased.

The process for extraction consists the steps of, identifying the source of the raw material, extracting and concentrating the raw material, mixing the extractive with thin layer silica gel by the proportion of 1:1, loading column by the ratio of sample : thin layer chromatography silica gel = 1:0.5, and washing with expansion agent. The invention realizes an extraction process with an increased standard body purity.

The invention discloses a condensing range hood, which comprises a shell, a separation screen, a centrifugal fan and a control device, wherein the shell consists of a front panel, two lateral plates, a rear plate and a top plate, the separation screen is arranged on the air inlet of the front panel and the bottom part of the front panel is provided with an oil collecting groove; the housing of the centrifugal fan is provided with oil holes; and a surrounding plate is arranged on the top plate, and the centrifugal fan is arranged in the surrounding plate. The condensing range hood is characterized by comprising a refrigerating device which is arranged in the shell. Due to the adopted structure, an oil and fume mixed gas entering the separation screen is cooled to a lower temperature, so that when the oil fume passes through the separation screen, oil is condensed and drops into the oil groove at the bottom part of the front panel and then flows into the oil collecting oil. Thus, the oil and fume separation rate is improved effectively and environmental pollution is reduced greatly.

Herein disclosed is a method of removing at least one component from a feed by subjecting the feed to high shear in the presence of carbon dioxide to produce a high shear-treated product and separating the at least one component from the high shear-treated product to produce a component-reduced product. Also disclosed is a method of removing asphaltenes from asphaltenic oil by subjecting the asphaltenic oil to a shear rate of at least 10,000 s−1 in the presence of carbon dioxide to produce a high shear-treated product and separating asphaltenes from the high shear-treated product to produce an asphaltene-reduced product oil. Systems are also provided for carrying out the methods.

The invention discloses a treatment method for separating copper and arsenic in arsenic filter cakes. The method comprises the following steps: (1) drying, grinding and sieving raw residues of the arsenic filter cakes; (2) mixing the sieved residues with water and pulping; (3) adding copper chloride into a solution; (4) placing the solution in a water bath stirrer at 80-85 DEG C and simultaneously introducing air and reacting for 6 hours; and (5) reacting for 1-3 hours, then adding sodium sulfide into the solution, introducing the generated sodium sulfide into leaching residues, wherein a leaching solution is an arsenic-containing solution. According to the treatment method for separating copper and arsenic of the arsenic filter cakes, the purpose of separating copper and arsenic can be effectively achieved; the leaching residue is returned to the smelting process and is used; then the leaching solution is oxidized; the pH is regulated; ferrous sulfate is used for depositing arsenic to generate scorodite crystals. The method effectively reaches high recovery rate of copper and harmless treatment of arsenic in the arsenic filter cakes with low cost.

The invention belongs to the field of photocatalytic materials, in particular to a preparation method and application of a Z-type photocatalyst MgAl LDH / CN-H. The preparation method comprises the following steps: firstly, preparing g-C3N4, and preparing CN-H by acidizing and modifying g-C3N4; secondly, preparing MgAl LDH from raw materials of magnesium nitrate, aluminum nitrate, citric acid and urea by the hydrothermal reaction in an alcohol and water mixed system; and finally, assembling and forming the Z-type photocatalyst MgAl LDH / CN-H by the electrostatic attraction action of positively charged MgAl LDH and negatively charged CN-H. The prepared photocatalyst exhibits excellent photocatalytic performance under simulated solar irradiation, the degradation rate for tetracycline hydrochloride can reach to be more than 99%, and the degradation rate is 23 times higher than that of a single photocatalyst of g-C3N4 and 7.5 times higher than that of a single photocatalyst of MgAl LDH, so that the photocatalyst has relatively good application prospects.

The method of separating reversibly thermally precipitable oligomeric N-substituted (meth)acrylamides and conjugates thereof from aqueous solution includes thermally precipitating the oligomeric N-substituted (meth)acrylamides and the conjugates thereof from an aqueous solution in the presence of at least one salt and then filtering in the presence of at least one filter aid. The filter aid has a wet density of 0.2–0.3 g / cc and comprises≧99% cellulose with fiber lengths<75 μm (99%) and=μm (65%). The salt can be a potassium, sodium, ammonium, calcium and / or magnesium chloride, acetate and / or sulfate salt and can be present in the aqueous solution in a concentration between 0.01 M and 3 M.

Provided is an apparatus for separating and collecting oil spilled in an ocean, which is capable of easily removing the oil spilled in rivers, reservoirs, or oceans using a density difference between water and oil. The apparatus for separating and collecting oil spilled in the ocean according to the present invention includes a separator body having a separation space therein formed to receive mixed water in which water and oil are mixed, and a mixed water introducing part formed at one side thereof to introduce the mixed water, a drainage member which is installed in the separation space, and in which an end thereof is connected and in communication with the separator body to be located lower than a level of the water, such that the water separated from the oil due to a density difference is discharged to an outer side of the separator body, and a length adjusting part configured to move a height of an upper end of the drainage member exposed to the outer side of the separator body vertically to control the level of the water in the separator body.

The invention provides a fuel filter. The fuel filter comprises a filter cover component, and a filter tank component, wherein the filter cover component comprises a filter cover body, an oil inlet tube arranged on the filter cover body, a temperature controller arranged in an inner cavity of the filter cover body and capable of inducting the temperature of the fuel and emitting a temperature signal, a heater capable of heating the fuel, an oil outlet tube arranged on the filter cover body and an oil suction tube; one end of the oil suction tube is communicated with the oil outlet tube and arranged in the inner cavity of the filter cover body and the oil suction tube is capable of extracting clean fuel and exhausting the extracted clean fuel into the oil outlet tube; the filter tank is detachably connected with the filter cover component, and comprises a filter tank body, a combined type filter element arranged on the upper part of the inner cavity of the filter tank body, a water collecting cavity formed in the lower part of the inner cavity of the filter tank body, a water level sensor arranged in the water collecting cavity and capable of inducting the water level height and emitting a water level signal, and a water draining valve. The fuel filter has the beneficial effects of good sealing property, an optimized size design, and high impurity filtering and oil-water separating efficiency. The invention further provides an engine with the fuel filter.

The invention discloses a method for separating corn stalk bark and corn pith, which comprises the steps of: (1) crushing corn stalks, (2) separating crushed stalk barks from other light parts; (3) separating light parts of corns from air flow and dusts. The invention further discloses a device for realizing the method for separating corn stalk bark and corn pith, which comprises a crusher, a high-speed oscillating sieve, a cyclone separator and a centrifugal fan, and all the parts are connected by pipes. The device is mainly used for separating corn stalks without leaves and corn pith, or directly dividing the whole corn stalks into two parts, i.e. stalk barks and a mixture of stalk leaves and corn pith. Because the stalk barks, leaves and pith of the corns are different in components, the separation of all the parts is helpful for high-efficiency utilization, and lays a foundation for commercialized high-efficiency utilization of stalks of corns and the like.

The invention discloses nano TiO2 / PMMA composite materials prepared by synthesizing three ionic liquids, namely BmimBF4, BmimPF6 and AmimBF4 by a microwave heating method respectively, and taking the ionic liquids as a reaction medium under the condition of microwave radiation respectively. The composite materials are subjected to testing and characterization by XRD, IR, SEM, TG and BET, and subjected to photocatalytic degradation performance test by a methyl orange solution under a high-pressure mercury lamp; the results show that the composite materials have an optimum preparation condition as for different ionic liquids, and the photocatalytic activity of the TiO2 / PMMA composite materials can be obviously improved by adoption of the ionic liquids as the reaction medium; the prepared TiO2 / PMMA composite materials represent high photocatalytic activity without high-temperature calcination; and the photocatalytic activity of the composite materials is further improved after TiO2 is loaded with PMMA and is obviously superior to that of an unloaded nano TiO2 catalyst under the same condition.

The invention relates to a double-column recycling chromatographic system. The double-column recycling chromatographic system comprises a first eluting pump, a second eluting pump and a sampling pump, wherein the first eluting pump and the second eluting pump are respectively connected with a first six-position three-way valve which is connected with a first one-way six-position valve and a second one-way six-position valve; the first one-way six-position valve and the second one-way six-position valve are respectively connected with a first chromatographic column and a second chromatographic column; the first chromatographic column and the second chromatographic column are also respectively connected with a first ultraviolet detector and a second ultraviolet detector. The double-column recycling chromatographic system has the advantages that the sample separating rate is increased, and the absorbing amount of adsorbing columns is increased by 30-50% compared with the traditional chromatographic system; and for separation of difficultly-separated samples, the components without being separated can be absorbed and desorbed for multiple times by multi-time circulation, so that substances which are separated in a difficult manner are separated easily, and further the yield and the purity reach higher level.

The invention specifically relates to a method for extracting immune cells from marrow, belonging to the technical field of cytobiology. The method comprises the following steps: (1) acquiring human marrow, diluting the human marrow with an alpha-MEM nutrient solution containing fetal calf serum, then carrying out centrifugation and discarding supernatant and a fat layer so as to obtain marrow cells; (2) transferring human peripheral blood into a centrifuge tube, carrying out centrifugation, sucking up blood plasma at an upper layer for subsequent usage and cells at a lower layer for separation of peripheral blood lymphocytes, and adding an alpha-MEM nutrient solution containing the blood plasma at the upper layer into the marrow cells to prepare a cell suspension; (3) adding a separating medium into another centrifuge tube, flatly spreading the cell suspension onto the separating medium, carrying out centrifugation, and sucking up albuginea-layer cells so as to obtain immune cells; and (4) adding isopyknic immune cells into an immune cell cryopreservation solution, carrying out uniform mixing and carrying out immune cell cryopreservation. The method provided by the invention can effectively improve the separation rate of the immune cells and the survival rate of the immune cells after cell cryopreservation and enhances the security of cells transfused back to a patient.

The invention discloses a mechanical pretreatment system for municipal domestic waste comprehensive treatment (marsh production). The system comprises a coarse crushing unit, a vertical shaft hammer type grinding unit and a dry-wet component extrusion and separation unit which are arranged in sequence. The units are sequentially connected through a conveying machine. The invention further discloses a mechanical pretreatment process for municipal domestic waste comprehensive treatment adopting the mechanical pretreatment system. The process comprises the process steps of coarse crushing, vertical shaft hammer type grinding and dry-wet component extrusion and separation. The technical defects that organic matter separation efficiency is low and the impurity content is high according to existing domestic waste comprehensive treatment mechanical pretreatment are overcome, the waste receiving adaptability is high, the equipment integration degree is high, continuous stable operation is achieved, various kinds of domestic waste with complex ingredients are used as raw materials, dry and wet components are produced to meet different follow-up technological requirements, coordinated treatment of various kinds of municipal domestic waste is achieved, and the system and the process are suitable for being applied and popularized.

When the oil component in water to be treated is passed for separation through two stages, a coarse-graining element (9) in a front stage separation chamber (4) and a coarse-graining element (16) in a rear stage separation chamber (5), occurrence of clogging in the coarse-graining element (16) in the rear stage separation chamber (5) is avoided to improve the rate of separation of oil component. The water to be treated moving from the front stage separation chamber (4) to the rear stage separation chamber (5) is filtered by a filter element in a filter (20), whereby the solid particle component contained in the water to be treated is separated.

The invention discloses a washable photo-catalytic super-hydrophobic cotton fabric, wherein a dopamine modified cotton fabric, the surface of which is loaded with beta-FeOOH nano-particles, is used asa carrier; and the surface of the carrier is modified with dodecanethiol. The invention discloses a preparation method of the washable photo-catalytic super-hydrophobic cotton fabric. Dopamine modification processing on the purified cotton fabric is carried out; by taking ferric salt as a precursor, the beta-FeOOH nano-particles grow on the surface of the dopamine fabric in situ; then, a low-surface-energy matter, namely dodecanethiol, is modified on the surface of the rough fabric; and thus, the super-hydrophobic cotton fabric having water resistance and photo-catalytic performance is obtained. The fabric in the invention can completely degrade methylene blue solution within 180 min in visible light; furthermore, the water resistance is good; after circulation for five times, both the stability and the reliability of degrading the methylene blue solution can reach 90%; furthermore, the surface droplet static contact angle of the cotton fabric is greater than 150 DEG C; and, after oilwater separation through different oil, the separation rate is greater than 98%.

The invention relates to a matched plastic film residue separation device for a cotton picker. The matched plastic film residue separation device comprises a separation chamber. A large net-shaped roller, a small net-shaped roller and an air-lock valve area arranged in the separation chamber. A cotton flow inlet, a plastic film residue outlet and a seed cotton outlet are arranged on the separation chamber. The large net-shaped roller and the small net-shaped roller are both of internal hollow structures, gauzes are arranged at the peripheries of outer layers of the net-shaped rollers, and the small net-shaped roller is arranged obliquely above the large net-shaped roller and close to the plastic film residue outlet. When the matched plastic film residue separation device works, the large net-shaped roller and the small net-shaped roller rotate in a counterclockwise mode. The air-lock valve structurally and mainly comprises a casing, an air-lock valve rotating shaft and a fan blade arranged on the air-lock valve rotating shaft. In an initial stage for picking cotton, sundries in seed cotton can be removed, so that a serial of related work procedure links of opening, removing residues and the like can be eliminated after seed cotton is harvested, and energy consumption is reduced. The device can greatly reduce sundry separation difficulty and is simple in structure, economical and practical.

The invention provides a solid-liquid-gas three phase flow-dividing rumen imitation continuous fermentation system, which is characterized by comprising a fermentation tank body (a), a stirring device (b), a liquid discharging valve (c), a solid discharging device (d), an injection pump (e), a computer (f) and a CH4 and CO2 detector (j). By using the fermentation system, the solid-phase, liquid-phase and gas-phase products produced by fermentation in the fermentation tank can be separated with high efficiency and delivered to the solid discharging device, the liquid discharging valve and the CH4 and CO2 detector respectively. The products in three phases discharged from reaction can be measured accurately by corresponding measuring means, so that deep study on fermentation reaction effectof different kinds of feed can be facilitated. Meanwhile, as an injection pump for supplying buffer solution into the fermentation tank constantly is designed, the drawback that a static fermentationdevice cannot realize continuous fermentation is overcome. In addition, the whole control process of the system can be implemented by high-automation control of a computer.

The invention relates to a determining method of an atorvastatin calcium related substance. The method comprises the following steps of 1, preparing a test solution, i.e. taking a proper amount of atorvastatin calcium, adding a solvent to dissolve and quantitatively dilute the atorvastatin calcium until about 1mg of atorvastatin calcium is contained in 1ml of solution, and taking the solution as the test solution; 2, preparing a mixed reference substance solution, i.e. weighing a proper amount of reference substances of an impurity A, an impurity B, an impurity C, an impurity D and an impurity E, and a proper amount of reference substance of the atorvastatin calcium, adding the solvent to dissolve and quantitatively dilute the reference substances until about 3 micrograms of impurity A, 2 micrograms of impurity B, 2 micrograms of impurity C, 2 micrograms of impurity D, 2 micrograms of impurity E and 10 micrograms of atorvastatin calcium solution are contained in 1ml of solution, and taking the solution as the mixed reference substance solution; 3, performing HPLC (High Performance Liquid Chromatography) analysis, i.e. taking 20 microliters of test solution and 20 microliters of mixed reference substance soulution, respectively filling the test solution and the mixed reference substance into a liquid chromatograph, recording a chromatogram until a gradient elution program is finished, and according to the peak area of the chromatogram, calculating the content of each component.