39results about How to "Good extraction" patented technology

The invention discloses a method for recognizing insulator image on the basis of the Canny edge detection algorithm. The method comprises following steps: 1. pre-treating an insulator image taken by a camera in an electric transmission line field; 2. performing edge detection to the image on the basis of Canny operators; 3. performing morphological erosion operation to the image; 4. performing insulator extracting and recognizing by use of Hough transformation line detection. By use of the method, insulators can be accurately located and identified in complicated electric transmission line fields, and the interference of complicated environment can be effectively avoided.

The invention discloses an extraction and preparation method of abamectin B2a, which comprises the following steps: preparing an abamectin fermentation liquid into dry mycelia, and leaching; concentrating the leaching liquor, and adding toluene and other extractants to carry out extraction; crystallizing the extract I; concentrating the mother solution into ointment; adding toluene into the ointment to obtain an extract II; adding a filter aid into the extract II, stirring, cooling, crystallizing, growing the grain, and carrying out vacuum filtration; adding toluene to dissolve the filter cake, heating the filtrate, cooling, crystallizing, growing the grain, and carrying out vacuum filtration to obtain an abamectin B2a crystal crude product; and recrystallizing the abamectin B2a crystal crude product to obtain the abamectin B2a crystal fine product. The method disclosed by the invention can effectively separate the abamectin B2a from the abamectin fermentation liquid, and has the advantages of high extraction rate and favorable purification effect.

Provided herein is an efficient solid-liquid separation method for bio-waste material treatment. The method contemplates the addition of certain cationic polyelectrolytes (or “polymers” as used herein) to the bio-waste materials prior to solid-liquid separation, such as centrifugation, thus greatly facilitate the subsequent solid-liquid separation step. The liquid portion, once separated from solid portion using the subject methods, can be subjected to further downstream nutrient recovery manipulations (such as phosphate precipitation and ammonia stripping) with potentially better efficiency, or may be used directly in a number of operations, such as a liquid diluent for feedstocks in an ethanol plant.

The invention provides a rock core fracture extraction method and a rock core fracture extraction system. The rock core fracture extraction method comprises the steps of: dividing a rock core image tobe extracted into a plurality of superpixels; inputting an image in a minimum circumscribed rectangle of each superpixel into a pre-obtained fracture identification model, and acquiring a judgment result indicating whether the image in each minimum circumscribed rectangle comprises a rock core fracture; and acquiring the rock core fracture according to the judgment results of the images in all ofthe minimum circumscribed rectangles. The rock core fracture extraction system comprises an image segmentation module, a judgment module and an extraction module, wherein the image segmentation module is configured to segmenting the rock core image to be extracted into the plurality of superpixels; the judgment module is configured to acquire the judgment result indicating whether the image in each of the minimum circumscribed rectangles comprises the rock core crack; and the extraction module is configured to acquire the rock core fracture according to the judgment results of the images in all of the minimum circumscribed rectangles. The rock core fracture extraction method and the rock core fracture extraction system segment the rock core image into superpixels, and extract the rock core fracture by using the fracture identification model, thereby improving the precision of rock core fracture extraction.

The invention provides a deep heavy oil reservoir in-situ regeneration foam oil exploiting method. The method includes: using vertical wells and/or horizontal wells to form a steam-stimulated well pattern; continuously injecting light alkane solvent into an oil reservoir through the steam-stimulated well pattern to form a first light alkane solvent slug; stopping light alkane solvent injection, and continuously injecting natural gas into the oil reservoir through the steam-stimulated well pattern to form a natural gas slug; stopping natural gas injection, continuously injecting light alkane solvent into the oil reservoir through the steam-stimulated well pattern to form a second light alkane solvent slug; shutting the wells for soaking; and opening the wells for continuous production; wherein the light alkane solvent is preferably alkane with carbon number of 5-8. By the method, foam oil flow can form in oil layers during steam-stimulated recovery, and oil production speed and recovery efficiency of the deep heavy oil reservoir can be increased effectively.

The invention relates to a method for extracting iodine from iodine-containing phosphorus ore, which is characterized by comprising the following steps: (1) an oxidizing agent prepared by one of chlorine or carbon tetrachloride or hydrogen peroxide is directly added to a phosphoric acid transporting pipeline; (2) phosphoric acid enters an extracting tower by directly entering the tower; (3) extracting gas adopts a tangential gas entering mode to lead diluted acid to generate rotational flows; and (4) a bubble type sieve plate is selected to lead the extracting gas and the diluted acid to be sufficiently contacted so as to extract iodine molecules in the phosphoric acid. The method sets an operation index aiming at the characteristic of iodine in the phosphorus ore in oxidizing and extracting processes and the characteristic of impurities in the diluted acid, the iodine extracting rate of the phosphorus ore can be effectively increased by 70-80 percent by using the method and the operation index and matching with the phosphorus ore extracting tower invented by an inventor, the operation cycle of the extracting tower is effectively prolonged in order to lead the extracting tower to continuously and stably operate for 200-300 hours, and the cleaning operation of the sieve plate is reduced.

The invention discloses a extracting method of grease, which is characterized by the following steps: 1) disintegrating materials to 10-40 order; 2) adopting liquid dimethyl ether as extraction solvent; conveying to materials with the rate of material and dissolvent at 1:2-1:24; extracting 30-120 min under the condition of pressure at 5-30 kilogram at 30-90 Deg C; 3) separating grease in the condition of pressure at 1-5 kilogramat 20-60 Deg C. The invention simplifies the manufacturing craft, which improving extracting rate effectively.

The invention discloses an automatic meander extraction method. The method comprises the steps that (1) vector river line layer data in the interval of [start, end] are read; a meander neck element and a corresponding meander element are extracted based on the shortest weighted distance; the position of the beginning of the meander interval is determined and denoted as [neckStart, neckEnd]; (2) the middle data of the interval [neckStart, neckEnd] are removed from the data interval [start, end], and sub-interval dividing is carried out; (3) the step (1) to the step (2) are iterated until all meanders and meander neck elements thereof are extracted; and (4) parts conforming to user-specified thresholds are extracted from the meanders and meander neck elements acquired in the step (3) to generate a meander line layer and a meander neck line layer. The automatic meander extraction method provided by the invention has the advantages of high execution efficiency and high accuracy.

The invention provides a method for extracting a liver region in an ultrasound image. The method is characterized by comprising the steps of: step 1, handling a situation of uneven illumination in the image, so that the brightness of the liver region in the image tends to be uniform; step 2, reducing noise in the image and completing image segmentation by using an FCM_I algorithm added with neighboring correlation information and priori shape information; step 3, acquiring a foreground region and a background region according to an FCM_I classification result and grey scale information; step 4, and acquiring an image of a complete liver region according to distribution and shapes of organs in a liver. The method for extracting the liver region in the ultrasound image provided by the invention improves the possible association of foreground pixels of the liver region, and reduces the association between the backgrounds of the liver region, thereby extracting the relatively complete liver region.

The invention discloses a method for determining a phthalates substance in a plastic package material. The method comprises the following steps: 1) preparing a standard solution: respectively taking 0.1 mL of a phthalate standard stock solution in a volumetric flask with volume of 5 ml and metering the volume by hexane, preparing 100.0 mg/L of a phthalate mixing standard solution in a refrigerator at the temperature of 0-4 DEG C for storage; 2) extracting a sample: weighing 0.5 g of a crushed plastic packaging bag sample, placing the sample in a 5 mL of centrifugation test tube, adding absolute ethyl alcohol and uniformly mixing the materials, performing ultrasonic extraction for 30 min, centrifuging the material, taking an upper layer clear liquid, dumping the residues; and 3) employing a chromatographic instrument for separating and analysis on the sample. The method employs ultrasound-assisted absolute ethyl alcohol extraction, a plurality of purifying technologies of low temperature processing and solid phase extraction are combined, matrix interference is effectively reduced, and the extraction effect is good.

The invention relates to the field of sustained organic pollutant monitoring, in particular to a method for treating, extracting and purifying organic chloride pesticide in sediment of a coal mining subsidence area. The method specifically comprises the following steps of (1) treatment of sediment; (2) soxhlet extraction; (3) purifying and dilution; in the treatment process of sediment, freeze-drying, grinding and sieving a sediment sample; in the extraction process, extracting the organic chloride pesticide from the sediment sample by the soehlet extraction; in the purification process, purifying an extraction liquid by a self chromatographic column, wherein, because the extraction liquid contains part of moisture and multiple organic pollutants, the purification process is required to prevent the influence on the instrument detection; finally, concentrating the to-be-detected sample. The method for treating, extracting and purifying the organic chloride pesticide in the sediment of the coal mining subsidence area has the advantages that the process is simple and convenient, the method is simple, and the like; the interference by the impurities is excluded as much as possible, the reagent amount is saved, the optimum extraction and purification effect is realized, and the higher recovery rate is guaranteed.

The invention relates to a method for extracting camellia seed meal protein employing ultrasonic assisted enzymolysis. The method comprises the following steps: (1) enzymolysis: evenly mixing crushed camellia seed meal which is filtered by an 80-100-mesh sieve with water according to the ratio of solid to liquid of 1:(6-7), adjusting the pH to 7.25-7.30, adding composite plant hydrolase which is 0.04-0.05% of mass of the camellia seed meal, carrying out enzymolysis at 65-70 DEG C for 3-3.5 hours, carrying out enzyme deactivation after enzymolysis is finished, and then centrifuging to obtain camellia seed meal residues; (2) ultrasonic assisted alkaline extraction: evenly mixing the camellia seed meal residues in the previous step with proper water, adjusting the pH value to 10.0-10.5, carrying out alkaline extraction at 40-45 DEG C for 80-90 minutes, and carrying out centrifugal separation after alkaline extraction is finished so as to obtain supernate, wherein ultrasonic assistance is adopted in the alkaline extraction process, the power of the ultrasonic wave is 300-1000W, and the ultrasonic time is 20 minutes; (3) acid precipitation: adjusting the pH value of the supernate obtained in the step (2) to 4.6, standing at room temperature for 1-1.5 hours, then centrifuging to obtain sediments, and freeze-drying the sediments to obtain the camellia seed meal protein. The extraction technology disclosed by the invention is mild in condition; the prepared camellia seed meal protein is good in shape, and color and luster, and can be widely applied to a feed additive.

The invention discloses an extraction method of plant genome DNA rich in polysaccharides. The method comprises the following steps: grinding through liquid nitrogen; adding precooled CATB-free bufferand mercaptoethanol, and sufficiently and uniformly vibrating; laying the materials on ice, controlling the temperature to be 4 DEC C, performing centrifugation, and abandoning supernatant; washing according through PBS according to viscosity, adding an SDS solution and mercaptoethanol, and uniformly mixing; then performing water bath, and performing reversing and mixing during water bath; addingequivoluminal phenol and chloroform after the materials are cooled, and reversing and mixing; performing centrifugation, taking supernatant, adding RNase A, performing reversing and mixing, and layingthe materials at a room temperature; adding isopropanol, reversing and mixing, laying the materials at a room temperature or a low temperature, performing centrifugation, abandoning supernatant, washing through 75 percent ethanol, and adding an appropriate volume of sterile water for dissolving. The method has a better extraction effect on plant gene rich in polysaccharides, and compared with conventional methods, the method has the advantages that the gene integrity and subsequent purity are better.

The invention discloses a recovering method for a copper-containing waste etching solution. The recovering method comprises the following steps that (1), the copper-containing waste etching solution is filtered and then conveyed into a neutralization dilution tank, the pH is adjusted to 2.6-3.5, and the copper-containing etching solution at least comprises a copper-containing acidic waste etching solution; (2), mixed liquid in the neutralization dilution tank is conveyed into a multi-level countercurrent extraction module through a first adjusting solution storage tank, an extraction agent and kerosene are added to the multi-level countercurrent extraction module, and then the multi-level countercurrent extraction is performed; (3), multi-level washing is conducted on the loaded organic phase obtained through the multi-level countercurrent extraction in the second step, and the washing water phase and the organic phase are obtained; (4), the organic phase obtained in the third step is subjected to reverse extraction, and the reverse extraction water phase and the reverse extraction organic phase are obtained; (5), the reverse extraction water phase obtained in the fourth step is subjected to oil-water separation, and the water phase and the oil phase are obtained; and (6), the water phase obtained in the fifth step is subjected to electrolysis from an electrolyte circulating tank to an electrolytic tank; and waste electrolyte and cathode copper are obtained through the electrolysis.

The invention discloses a cosmetic composition containing a traditional Chinese medicine extracting solution. The cosmetic composition consists of dwarf lilyturf tubers, hippophae rhamnoides fruits, licoflavone, radix astragali, bighead atractylodes rhizomes, camomile, purslane herbs, smoked plums, ginseng, snow lotus herbs, frankincense, hairyvein agrimonia herbs, rhizoma polygonati odorati, cornu cervi pantotrichum, paeonia suffruticosa, Chinese herbaceous peony, centella asiatica, chamomile, purple perilla, lophatherum gracile, platycodon roots, turmeric, herba scutellariae barbatae, mint,herba hedyrotidis diffusae, sodium hyaluronate, vitamin E, butanediol, sterin, palmitoyl tetrapeptide and deionized water. Through collaborative application of multiple traditional Chinese medicine skin care products, the extraction effect is good; and through multiple-directional comprehensive cultivating and conditioning of restraining melanin generation, moisturizing, dispelling small poxes andthe like, the effects of whitening skin, dispelling freckles, moisturizing, resisting wrinkle, resisting inflammation and dispelling small poxes can be jointly exerted, and finally, the effect of treating both manifestation and root cause of diseases can be achieved. The cosmetic composition has repair effects on damaged skin, has favorable whitening effects on freckles, chloasma, senile plaque and melanin pigmentation caused by age increment and pockmark, besides, is a purely natural product, and is non-toxic and nonirritant.

The invention discloses an extraction and purification method for matrine and oxymatrine in Sophora flavescens. According to the method, ultrasonic extraction, organic solvent extraction and various separation techniques are applied scientifically and comprehensively, organic combined points of the conventional extraction and purification methods are summarized, ultrasonic primary extraction is performed with ethanol with reasonable concentration, then total alkali in the Sophora flavescens is extracted effectively by macroporous resin, and finally, the matrine and the oxymatrine are obtainedby column chromatographic separation. Particularly, the optimal separation effect is obtained by applying specific adsorbent as filler. The extraction process is fine, and the extraction rate and thepurity of the obtained matrine and oxymatrine are 91% or higher. The process is simple, industrialization is easy to realize, the product purity is high, strong guarantee is provided for antiviral, anti-inflammatory and antitumor application of the matrine and the oxymatrine, and the matrine and the oxymatrine have good market development prospect.

The invention discloses a novel fast extracting device which comprises a tank body, a stirrer, a slag discharge door, a feed port and a discharge port, wherein the inverted stirrer is arranged inside the tank body; the stirrer penetrates through the bottom part of the tank body; the slag discharge door is arranged at the bottom part of the tank body; a stainless steel cloth is arranged on the slag discharge door; the feed port and the discharge port are arranged at the top part of the tank body, and a heating device is also arranged inside the tank body. The invention provides the novel fast extracting device which is better in extracting effect, high in extracting efficiency and convenient to discharge slag.

The invention provides a method for detecting halogenated pyridinol disinfection by-products in a water body, and belongs to the technical field of municipal water supply and drainage and environmental engineering. The method comprises the following steps: pretreating a water sample, and adjusting the pH value of the water sample to 3-4 in the pretreatment process to obtain a solution to be detected; then, detecting halogenated pyridinol disinfection by-products in the solution to be detected by adopting a liquid chromatography-mass spectrometry technology; and establishing a working curve ofthe halogenated pyridinol disinfection by-products, obtaining a map of the substance to be detected, and calculating the concentration of the halogenated pyridinol disinfection by-products by adoptingan external standard method. According to the detection method disclosed by the invention, a pretreatment method of liquid-liquid extraction is optimized, and the recovery rate of halogenated pyridinol disinfection byproducts is increased; the liquid chromatography-mass spectrometry method is optimized, a relatively low detection limit is obtained, and a reliable detection method is provided formonitoring and subsequent control of halogenated pyridinol disinfection byproducts in a water body.

The invention discloses a beating type compound cloth adhesive powder extractor. The beating type compound cloth adhesive powder extractor comprises a frame, wherein a compound cloth fixing frame usedfor fixing a compound cloth is arranged on the frame; a driving device and beating rods capable of swinging on the frame to beat the compound cloth are arranged on the frame; an output end of the driving device is connected with cams used for driving the beating rods to swing. The beating type compound cloth adhesive powder extractor adopts a manner of repeatedly beating the compound cloth by using the beating rods; the manner is similar to a manual beating manner; the beating type compound cloth adhesive powder extractor is excellent in extraction effect and high in efficiency, and is environmentally friendly and healthy.

The invention discloses an ionic liquid and a method for extracting codfish roe protein by utilizing the same. The ionic liquid is mainly prepared from the following raw material components: alkaloidand organic acid; the organic acid is selected from at least one of tartaric acid, salicylic acid, succinic acid and benzoic acid; and the molar ratio of the alkaloid to the organic acid is (1-12):(0.2-3). The method for extracting the codfish roe protein by utilizing the ionic liquid comprises the following steps: mixing codfish roes with an aqueous solution of the ionic liquid, performing pre-freezing and unfreezing, performing wall breaking, stirring and centrifuging on the unfrozen mixture, and filtering a supernate. The ionic liquid has a very good extraction effect on codfish roe proteinand high extraction efficiency, and the extracted protein has high biological activity and high stability and is easy to store.

The invention provides a pathological voice spectrum reconstruction method based on an energy operator. The method comprises the steps of adaptive windowing of a pathological voice signal fundamental frequency, calculation of a power spectrum, reconstruction of the power spectrum, frequency domain smoothing of the power spectrum, calculation of a power cepstrum, homomorphic filtering and calculation of a spectrum envelope. According to the pathologic voice spectrum reconstruction method based on the energy operator, the problem that pathologic voice spectrum components are too dispersed is solved, main information, spectrum components and peak values of voice can be effectively extracted, a reconstructed pathologic voice spectrum envelope is obtained, and the pathologic voice spectrum reconstruction efficiency is improved. The problem that the traditional voice analysis method always fails in parameter extraction of pathological voice is solved.

The invention provides a preparing method of a composition with natural sun screen performance. The preparing method comprises the steps that A-phase raw materials are sterilized, the temperature is adjusted to 75-85 DEG C, and stirring is conducted until the materials are dissolved and the mixture becomes transparent, wherein the A-phase raw materials comprise water and carbomer; B-phase raw materials are heated to 80-90 DEG C and stirred evenly, wherein the B-phase raw materials comprise one or two of glycerol monostearate and PEG-100 stearate and one or two of cetearyl olivate and sorbitanolivate; the B-phase raw materials and the A-phase raw materials are mixed evenly at 75-85 DEG C; homogeneous emulsification is conducted; C-phase raw materials are added and stirred evenly, wherein the C-phase raw materials comprise triethanolamine, a dendrobium officinale extract, a ginger extract, a magnoliae officmalis cortex extract and an angelicae sinensis radix extract. The preparing method is simple and easy to implement, and supercritical CO2 is adopted to extract natural plants, so that the extraction effect is good, and the preparing method is economical and environmentally friendly and saves energy. The prepared composition has high safety and high sun screen capacity.

The invention belongs to the field of traditional Chinese medicine extracts, and particularly relates to a cortex eucommiae extract composition for treating gestational hypertension and an applicationof the cortex eucommiae extract composition. The composition comprises 20-40 parts of ursolic acid, 10-25 parts of chlorogenic acid, 20-60 parts of a mixing extract of pinoresinol diglucoside and liriodendrin, and 30-50 parts of total flavone. The cortex eucommiae extract composition is prepared through the steps of enzymolysis, multiple-step extraction, dissolving and the like. The preparation method is simple and efficient, the prepared cortex eucommiae extract composition has good effect in the respect of treating gestational hypertension, and besides, the side effect is reduced.

The invention discloses an extraction method of China-hemp seed storage protein, and relates to an extraction method of protein. The method solves the problem that an existing method for extracting the China-hemp seed storage protein is poor in effect. The extraction method of the China-hemp seed storage protein comprises the following steps: 1, extracting; 2, combining two centrifuged supernatants to obtain water-soluble protein; and 3, combining the two centrifuged supernatants to obtain salt-soluble protein. According to the method, the extraction of the China-hemp seed storage protein is realized, and the extraction effect is good. According to the extraction of the China-hemp seed storage protein, the China-hemp seed storage protein is primarily separated according to different solubility, then water-soluble protein and salt-soluble protein in China-hemp seeds are obtained respectively, the two proteins have different effects, and more scientific and more efficient proteins can be obtained according to actual requirements and different proportions. And the protein mixture has higher nutritional value.

The invention relates to a pretreatment kit for bacterial plasmid extraction. The pretreatment kit comprises a component A, namely 100-200mg/ml lysozyme, and a component B, namely a washing solution,wherein preferably, the component A is 100mg/ml lysozyme. The invention also discloses a pretreatment method for bacterial plasmid extraction, and a bacterial plasmid extraction kit and method. The pretreatment kit and method for the bacterial plasmid extraction can effectively improve the bacterial plasmid extraction efficiency, particularly have greatly excellent lactobacillus plantarum extraction effect, can solve the problem of being incapable of efficiently extracting gram-positive bacterium plasmid of existing methods, and thus have broad market application prospects.

The invention discloses a composition extracted from Cistanche deserticola and application of drug composition and extracting method, which comprises the following steps: preparing raw material; lixiviating through alcohol; condensing; extracting; doing water sedimentation; drying; dehydrating; filtering through macropore resin. The invention increases the content of pineal glycoside and ergosterin steroid glycoside to 56. 3% and 9. 78% respectively, which can treat hypertension obviously.

The invention discloses a road vehicle shadow feature extraction method. Firstly, data needing to be processed are reduced and road surface areas of an image are extracted through a geometric constraint method, gauss convolution is conducted on the road surface areas, gray level upper limit threshold values of shadows are obtained, the image is scanned in lines through the threshold values, collection of shadow lines is acquired, and location information of the shadow lines is recorded. The shadow lines are divided into standard shadow lines and ordinary shadow lines according to difference value between an upper neighborhood and a lower neighborhood, the standard shadow lines are stored in a result set, shadow features of vehicles are simulated according to location relation fusion between the standard shadow lines and the ordinary shadow lines, and areas which may include the vehicles are extracted. By means of the shadow lines extracting and fusing to simulate existing feature extraction method based on the areas, the extraction effect of most of the vehicles is good. The consuming time is small, the rate of missing detection is low, the detection effect is good for distant vehicles particularly, and the detection rate of a system is improved.

The invention discloses a process method for treating coal chemical industry wastewater. The method comprises the steps: extraction treatment of benzene/phenol/ammonia substances in the wastewater, hydrolytic acidification treatment, oil removal treatment, adsorption treatment, deep biochemical treatment and filtration. By adopting the wastewater treatment method disclosed by the invention, afterthe coal chemical industry wastewater is subjected to benzene/phenol/ammonia substance extraction treatment, macromolecular refractory organic matters in the wastewater are adsorbed and removed through adsorption treatment, so that the biodegradability of the wastewater is further improved, then biochemical substances in the wastewater are further removed through deep biochemical treatment, and thus the treatment efficiency of deep treatment is greatly improved. According to the method, no chemical needs to be added into the wastewater, so that the problem that the quality of effluent is influenced due to the addition of the chemical is avoided, and the method is an efficient and safe coal chemical industry wastewater treatment process.

The invention discloses a method for detecting bisphenol compounds in milk. The method comprises the following steps: firstly, measuring a certain amount of milk sample to be detected, adding a bisphenol compound standard substance into the milk sample to be detected, and fully vortex and uniformly mixing; transferring the sample to a specific solid-phase extraction column, and enabling the milk sample to be detected to pass through the specific solid-phase extraction column through a negative pressure device, so that the bisphenol compounds in the milk sample to be detected are enriched on the specific solid-phase extraction column; eluting the specific solid-phase extraction column by using 3mL of ultrapure water so as to remove strong-polarity interferents; and eluting the specific solid-phase extraction column with methanol, collecting an eluent, carrying out nitrogen blowing until the eluent is completely dried, carrying out constant volume determination with methanol, carrying out vortex filtration on a filter membrane, and carrying out determination with liquid chromatography-tandem mass spectrometry so as to realize detection of the bisphenol compounds in the milk sample to be detected. The method is simple to operate and good in extraction effect, can greatly improve the detection sensitivity, and is suitable for detecting low-concentration bisphenol compounds in large-volume milk.

The invention discloses a compound eluting agent for arsenic-polluted soil and an arsenic-polluted soil remediation method. The compound eluting agent is composed of sodium dithionite and tartaric acid, arsenic-polluted soil and the compound eluting agent are evenly mixed, and arsenic in the soil can be effectively removed through oscillation eluting. Sodium hydrosulfite and tartaric acid are combined and compounded, the content of arsenic in polluted soil can be effectively reduced, the arsenic removal rate can reach 80% or above, and the eluting agent is simple in component, remarkable in effect and low in cost and has a very good application prospect.