150results about How to "High enrichment rate" patented technology

The invention relates to a wet-process metallurgy technology in the metallurgical field and particularly relates to an all-wet process pretreatment method for copper anode mud. The all-wet process pretreatment method is as follows: firstly, carrying out hot acid leaching onto copper anode mud, leaching metals such as copper, selenium, sliver, barium, and the like and adding in liquor, leaving gold, tellurium, tin, platinum and platinum-family metals in leaching residue; by virtue of alkali leaching of hot acid leaching residue, leaching and enriching metals such as tellurium, lead, arsenic, and the like in liquor; carrying out chlorination on the obtained tellurium-separating residue for separating gold, enriching the gold, the platinum and the platinum-family metals in the liquor, enriching the tin and the antimony in residue; diluting the hot acid leaching liquor by water, enriching the copper and the selenium in diluted liquor, dissolving obtained precipitates by nitric acid, and filtering to obtain barium sulfate molten slag and sliver nitrate liquor. The all-wet process pretreatment method disclosed by the invention cancels a sulfating and roasting process which is high in energy consumption and great in pollution in the conventional copper anode mud treatment method, removes and openly recycles barium by the hot acid leaching before extracting the gold and the sliver, reduces treatment amount of the copper anode mud, and improves recovery rate of gold and sliver.

The invention provides a method for recovering gold, silver, tin and copper from industrial wastes. The method comprises the following steps of: (a) adding the industrial wastes in hydrochloric acid solution, adding an oxidant, and performing oxidation acid-leaching treatment to obtain leaching slag, and solution containing tin ions and copper ions; (b) treating the leaching slag to obtain gold and silver; (c) adding iron in the solution containing tin ions and copper ions, and reacting to obtain copper, and a solution containing tin ions and ferrous ions; (d) adding lime in the solution containing tin ions and ferrous ions, and reacting to obtain tin, and solution containing ferrous ions; (e) heating the solution containing ferrous ions, charging air and adding lime, and reacting to obtain goethite and calcium chloride solution; (f) adding concentrated sulphuric acid in the calcium chloride solution to obtain calcium sulphate precipitate and hydrochloric acid solution. The various steps of the method disclosed by the invention are effectively coordinated; zero-discharge in production can be realized; precious metals are efficiently separated, and valent by-products of iron mine and gypsum are obtained; the method has good application prospect.

The invention provides a method for extracting indium from indium-rich smoke dust by using an oxygen pressure technology. The method is characterized by comprising the following steps of: carrying out leaching indium extraction of the difficult-to-handle indium-rich smoke dust of a Pb-Sn reverberatory furnace by adopting a wet-process metallurgical oxygen pressure acid leaching technology, and highly enriching and recycling valuable metals in the raw material; and purifying to remove impurities of leachate, and carrying out extraction, replacement and electrolytic refining, thereby obtaining greater than 99.995% of electrical indium products. The technology method has the advantages that the indium leaching rate of the indium-rich smoke dust of the Pb-Sb reverberatory furnace and the enrichment rate of the valuable metals can be obviously increased, and the comprehensive recycling effect can be achieved, thereby waster water of indium smelting can be discharged up to the standard after being processed with low cost, the environmental pollution in the indium extraction process is eliminated. In the process, the leaching rate of the indium is more than 97%, leaching residues containless than 0.01% of indium, the enrichment rate of plumbum, tin, bismuth and zinc is more than 98%, the quality of refined indium products is more than 99.995%, and plumbum enriching slag containing greater than 60% of Pd is obtained. The technical scheme can independently form a system, can also be used for improving and perfecting old technologies and has higher popularization and application value.

The invention discloses a method for collaborative resource between a waste circuit board and an automobile tail gas waste catalyst. The method comprises the following steps: firstly, obtaining a copper-rich collective through performing crushing, magnetic separation and high voltage electrostatic separation on the waste circuit board; crushing the automobile tail gas waste catalyst to obtain waste catalyst powder; mixing the copper-rich collective and the waste catalyst powder to obtain mixed powder; adding a reagent in a certain amount of mixed powder in proportion, placing in a high-temperature muffle furnace for reaction and cooling to a room temperature after the completion of the reaction to obtain a product of which an upper layer is a glass layer, and a lower layer is a copper layer; separating the copper layer from the glass layer, taking out, crushing, then placing the glass layer in the muffle furnace for heat treatment; after the completion of the treatment, pouring microcrystalline glass liquid into a mold while the microcrystalline glass liquid is still hot, reducing the temperature and forming; after a room temperature is lowered, preparing out fluorescent microcrystalline glass. In the process, the recovery rate of precious metals exceeds 98 percent, the precious metals are enriched for 20 times or more, and the obtained fluorescent microcrystalline glass can betaken as an LED fluorescent lamp and other materials. To sum up, the method has the characteristics of being efficient, environmentally friendly and high in resource degree and is suitable for large-scale industrial application.

The invention relates to a method for leaching zinc and recovering valuable metals through carrying out pressurized oxidation on zinc sulfide concentrates. The method can be used for simultaneously treating zinc sulfide concentrates rich in lead, silver and dissipated metals and zinc sulfide concentrates free of lead, silver and dissipated metals. The method comprises the steps of firstly, carrying out peracid leaching on most of zinc and dissipated metals in zinc sulfide concentrates rich in zinc and valuable metals into a solution at high temperature and high pressure to obtain heavy metal contained residues, namely, lead and silver residues; then, carrying out weak acid leaching on zinc in the zinc sulfide concentrates only containing zinc at high temperature and high pressure, and meanwhile, separating iron and gangue components from main metal zinc; finally, settling gallium, germanium, indium and the like in the dissipated metals in the leached solution by using a neutralizing agent, and enriching gallium, germanium, indium and the like into neutralized residues. The method can be used for simultaneously treating zinc sulfide concentrates with different components under the condition that technical parameters and supporting facilities are not changed; in addition, the recovery rate of zinc is high, and meanwhile, the recovery rate of valuable metals is also high.

A low-fuel consumption and low-pollution combustion system supplies an engine with a mixture, in which oxygen contained in air is separated from nitrogen through a PSA (pressure swing adsorption) whereby oxygen having purity above 95% and a fuel mixture is fed into and burned in the combustion chamber obtaining a desired engine output with low-fuel consumption. Nitrogen is previously removed so that nitride oxide can be minimized during combustion procedure and CO and toxic gas derived from incomplete combustion can be minimized. The system obtains high engine output and low-fuel consumption by reducing toxic gas derived from incomplete combustion. The system includes an oxygen separator for separating oxygen from nitrogen by introducing external air into adsorption towers with predetermined pressure while storing the oxygen separated from the nitrogen in an oxygen storage tank and exhausting the nitrogen.

The invention provides a method for leaching an alloy material obtained from the magnetic-separating copper-nickel ore concentrate, relating to a method for recycling the platinum group metals in the process of producing the metallic nickel, in particular to a method for recycling the platinum group metals from the fine alloy material of the leaching magnetic separation copper-nickel ore concentrate. The method is characterized in that the leaching process adopts two sections: one is leaching at standard atmosphere and the other is leaching with pressurization to obtain the leaching slag with high platinum group metals content and the leaching liquid with high nickel-copper content. The method of the invention processes the alloy material of the leaching magnetic separation copper-nickel ore concentrate by the wet method technique, and adopts the processing technique combining the sulphuric acid leaching at standard atmosphere and the leaching with pressurization to obtain the leaching liquid with high nickel-copper content and the leaching slag with high platinum group metals content; the leaching slag is directly used for recycling the platinum group metals and the leaching liquid enters the electrolytic nickel system. The method effectively solves the recycling problem of the platinum group metals and the problem of environmental protection, is simple and efficient and protects the environment.

The invention discloses preparation and an application of a light-triggered erythrocyte membrane wrapped NO nano bionic donor material. The method comprises the following steps: (1) synthesizing a sulfhydrylated mesoporous silica wrapped polydopamine nanoparticle, (2) preparing a dual-load polydopamine (PDA) @ mesoporous silica nanoparticle, (3) preparing a target marked erythrocyte membrane, and(4) preparing a target molecular marked erythrocyte membrane wrapped dual-load polydopamine @ mesoporous silica nanoparticle. The PDA@mSiO2 nanoparticle with good photothermal conversion performance is successfully integrated in an NO bionic nanoparticle structure; a cell membrane can be ablated to effectively release a loaded medicine under stimulation of near infrared light; at the same time, amore obvious killing effect can be caused on tumor cells; and therefore, a combined application of various treatment means is achieved.

The invention provides a method for removing fluorine, chlorine and valuable metals in secondary zinc oxide, which solves the problems of low removal rate, high energy consumption, low environment friendliness and low economical efficiency in the prior art. According to the method, high-fluoride / chloride secondary zinc oxide used as a raw material is granulated, aired and subjected to rotary kiln roasting, flue gas is settled and subjected to dust collection, the roasted product is subjected to indirect water cooling, and a mixed air heating process is adopted by using natural gas as a heat source, thereby removing the fluorine, chlorine, lead and indium and implementing reenrichment of indium, lead and other valuable metals. The roasting process is utilized to remove most of fluorine, chlorine, lead and indium; the lead and indium are enriched in the roasted dust, thereby solving the problem of later processing of the high-fluoride / chloride secondary zinc oxide; and the method has the advantages of fewer required technical processes, high efficiency, smooth procedure, high degree of mechanization and the like, and greatly enhances the environmental and economic benefits.

The invention discloses an airflow type headspace liquid-phase microextraction method. The airflow type headspace liquid-phase microextraction system is an open system, inert gas is introduced into the surface of the sample matrix through an inert gas inlet pipe so as to mix the inert gas with the object in the gaseous phase and also drive the object to move towards the extraction solvent continuously, when passing through the extraction solvent, the object is adsorbed by the extraction solvent, the inert gas flows out the extraction system, and the process is continuously repeated until the extraction ends. The introduction of the inert gas not only increases the rate of evaporation of the object from the sample matrix, but also increases the mass transfer velocity from the object to the extraction solvent, so as to increase the enrichment ratio of the object; as the airflow type headspace liquid-phase microextraction system is an open system, the gaseous phase volume is not limited, which is beneficial for enriching the low vapor-pressure object; and by prolonging the enrichment time, the gaseous phase volume in the enrichment system is enlarged so as to increase the enrichment ratio of the object. The invention has the advantages of the enrichment detection of the low vapor-pressure object.

The invention relates to a preparation process of functional polyunsaturated fatty acid in bee pollen, which comprises the following steps: firstly, preparing free crude fatty acid; secondly, preparing urea alcohol; thirdly, performing urea inclusion reaction; fourthly, obtaining complex fatty acid; fifthly, obtaining polyunsaturated fatty acid; and sixthly, obtaining the polyunsaturated fatty acid methyl ethyl oxalate product. The invention optimizes all parameters influencing the enrichment effect, ensures the optimal process condition, improves the yield of the polyunsaturated fatty acid, has simple process, low production cost and easy industrial popularization and application, and can realize the massive production; meanwhile, the process more completely keeps the nutrient and the physiologically active of the functional polyunsaturated fatty acid, thereby being widely applied to the development and the production of relative medicine and health product thereof.

The invention discloses a membrane-type gas enrichment device based on a polyimide film, comprising a silicon substrate, a top cap and an enrichment region arranged between the silicon substrate and the top cap; the enrichment region comprises a hanging membrane, a film heater and an adsorption film, the hanging membrane is arranged on the silicon substrate, the film heater and the adsorption film are arranged on the surface of the hanging membrane, the top cap is provided with an air inlet and an air outlet, an airflow passage is formed between the hanging membrane and the top cap; the invention is characterized in that the hanging membrane adopts the polyimide film which is not provided with a through hole, and airflow in the airflow passage flows along the surface thereof. Due to excellent tenacity of the polyimide film, the size of the polyimide film can be far greater than the size of the membrane of inorganic rigid materials such as SiN and SiO2, not only is the enrichment area greatly enlarged but also the effective contact between the airflow and the adsorption film is also given into consideration, thus improving the enrichment ratio.

The invention provides a pretreatment method for platinum palladium concentrate. The pretreatment method comprises the following steps: mixing the platinum palladium concentrate, sodium carbonate, sodium hydroxide and sodium chlorate uniformly according to a certain ratio; roasting at certain temperate; transforming impurity elements such as copper, selenium and tellurium into corresponding oxide or corresponding salt; and adding the roasting slag into water according to a certain ratio and leaching, wherein impurities such as copper, selenium and tellurium enter the alkaline leachate, and gold, platinum and palladium are enriched in the alkaline leaching slag. Compared with the traditional pretreatment method for the platinum palladium concentrate, the pretreatment method for the platinum palladium concentrate has the advantages that oxidation roasting and water leaching are adopted, so the noble metal content of the alkaline leachate is low; the leaching rate of the impurities such as copper, selenium and tellurium is high, the copper leaching rate reaches over 95 percent, the selenium leaching rate reaches over 88 percent, and the tellurium leaching rate reaches over 95 percent; the enrichment rate of the noble metal such as gold, platinum and palladium is high, so the extraction treatment on gold, platinum and palladium in the next step is promoted; and equipment is low in corrosivity, safe in operation, good in comprehensive recycling benefit and good in operating environment.

The invention discloses a gas flow type dynamic liquid phase micro-extraction method. An extraction system is a semi-closed system containing inert gases; substances to be measured are heated at high temperature to be changed into gaseous substances, and complete and quick separation of non-volatile substances, volatile substances and semi-volatile substances in complex samples is realized; the gaseous substances to be measured are transferred into an extraction phase in a micro-injection needle through an adaptor under the flow of the inert gases; the flow of the inert gases and a extraction solvent in the micro-injection needle are used for realizing the semi-closed system; and finally, complete and quick enrichment is realized. In the extraction process, the contact area between an object and the extraction solvent is enlarged by using a small amount of the extraction solvent in a mode of forming an organic micro-liquid membrane. The method has the main advantage of realizing simultaneous and quick separation and complete enrichment of volatile organic components, semi-volatile organic components and non-volatile components, and instrument analysis can be directly carried out after the method is used for extracting.

The invention belongs to the field of heavy-metal-contaminated soil restoration and discloses a restoration method for a cadmium-contaminated rice field. The restoration method comprises the steps of planting sedum plumbizincicola in the cadmium-contaminated rice field; after a certain growing period is reached, removing the sedum plumbizincicola, and then planting rice; when the rice reaches a certain growing period, applying biochar to the rice field; after the rice is harvested, detecting the content of cadmium in the rice field and the content of cadmium in rice grains; and if the content of cadmium is still high, repeating the above procedures to conduct circulatory planting till the content of cadmium is qualified. By means of the restoration method for the cadmium-contaminated rice field, the cadmium enrichment ratio of the sedum plumbizincicola is greatly increased, and through solidification of the biochar, the cadmium removal rate of the rice field is increased.

The invention provides a method for preparing ruthenium trichloride with low-concentration complicated ruthenium-containing waste liquid. The method comprises the steps that the low-concentration complicated ruthenium-containing waste liquid is subjected to acidification, selective ruthenium settlement and routine washing and drying; enriched ruthenium residues are obtained; the ruthenium residues are subjected to chlorine alkalization distillation, hydrochloric acid absorption, concentration and baking; and reagent-grade ruthenium trichloride is prepared. The method has the characteristics that a technology is simple; the energy consumption is low; a ruthenium enrichment rate is high; an impurity element reaches the standard; the distillation times are less; the reaction time is short; the product quality is easy to control; and a product yield is high.

The invention discloses a hyaluronic acid derived maytansine prodrug, a preparation method thereof and application of maytansine prodrug in preparation of tumor target treatment medicines. The maytansine prodrug comprises a hyaluronic acid main chain and a maytansine side chain, wherein maytansine and hyaluronic acid are connected by a disulfide bond, and the hyaluronic acid has a molecular weight of 7-500kDA; and the maytansine content in the hyaluronic acid derived maytansine prodrug is 10-50 percent. The hyaluronic acid derived maytansine prodrug is amphipathic, and can be self-assembled in an aqueous solution to form a nano-drug, the outer hydrophilic layer is formed by hyaluronic acid, and the inner hydrophobic layer is formed by the hydrophobic drug maytansine, so that the maximum tolerated dose of an anti-cancer drug can be improved to a great extent. Furthermore, the hyaluronic acid derived maytansine prodrug has a positive target capability without extra modifying target molecules, has a high enrichment ratio on a tumor part, has high cytotoxicity to tumor cells and canwell inhibit tumor growth in the in-vivo treatment process for a tumor-bearing naked mouse.

The invention relates to a method for measuring phenolic compounds in immature bitter oranges or fructus aurantii through SPE-HPLC.The method specifically comprises the steps that powder of the immature bitter oranges or powder of fructus aurantii is taken, accurately weighed and placed into a conical flask with a cover, methyl alcohol is precisely added, ultrasonic extraction, cooling, well shaking and filtering are conducted, filtrate is precisely measured, pressure is reduced, the filtrate is recovered and dried, the product is dissolved with water, the mixture flows through a solid-phase extraction column which is balanced through methyl alcohol and water in advance, then, leaching with methyl alcohol, eluting with pure methyl alcohol, volume metering for the part eluted with pure methyl alcohol and filtering with a millipore filter membrane are sequentially conducted, and testing liquid is obtained; the phenolic compounds are measured.Compared with the prior art, the method has the advantage that as SPE is adopted for pretreating the sample, the effect of impurities on measuring is reduced; solid-phase extraction has the advantages that operation is easy and convenient, the enrichment ratio is high, less solvent is consumed, cost is low, and extraction and separation are integrated.In addition, chromatographic conditions established through the method have good resolution for the phenolic compounds to be measured, and analysis conditions are appropriate.

The invention provides a detection kit for NPC (nasopharyngeal carcinoma) CTCs (circulating tumor cells). The detection kit comprises a human peripheral blood leucocyte removal part and an immunofluorescence in-situ hybridization identification part, wherein the human peripheral blood leucocyte removal part comprises a dilution buffer, a red blood cell lysis buffer, a density gradient centrifugation medium, a cell immobilization liquid A and immunomagnetic beads, and the red blood cell lysis buffer is formed by mixing ammonium chloride, sodium bicarbonate and an EDTA-2Na solution; the immunofluorescence in-situ hybridization identification part comprises a buffer, a hybridization stationary liquid B, a biotin labeled CEP8 probe, a red quantum dot labeled CD45 antibody, green quantum dot labeled streptavidin, a mounting medium and bovine serum albumin powder. The detection kit combines an immunomagnetic enrichment and separation technology, a fluorescence in-situ hybridization technology, an immunofluorescence cytochemical technology and an NPC CTC counting technology and can determine the number of the NPC CTCs in a sample precisely.

The invention relates to an immunomagnetic bead for aflatoxin B1 enrichment purification and a preparation method and application thereof. A carboxyl carboxyl serves as a carrier, an aflatoxin B1 monoclonal antibody serves as a recognition midbody, the immunomagnetic bead coupled with the aflatoxin B1 monoclonal antibody is prepared through the process of activating, coupling, washing and closing, and aflatoxin B1 in a detecting sample can be efficiently captured and enriched through incubation of the immunomagnetic bead in proper buffer liquid under certain conditions. The immunomagnetic bead for aflatoxin B1 enrichment purification has the advantages of increasing the concentration of aflatoxin B1 in the sample to be detected, improving the lower limit of detection, eliminating interference of impurities, improving detecting accuracy and reliability, shortening sample treatment time and achieving fast detection.

The invention relates to a genetically modified cell of coexpression mouse membranous type interleukin 15 and retinoic acid early transcript 1 epsilon (Rae-1 epsilon) and a preparation method thereof. The genetically modified cell is a BaF3 cell which can stabilize the genetically modified cell of the coexpression membranous type IL-15 and Rae-1 epsilon protein. The genetically modified cell can be prepared by a method comprising the following steps: amplifying a mouse Rae-1 epsilon gene and a mouse membrane expression type IL-15 gene by a polymerase chain reaction (PCR) technology; respectively inserting the amplified mouse Rae-1 epsilon gene and the amplified mouse membrane expression type IL-15 gene into two polyclone sites of an eukaryotic expression vector pVITRO2-mcs to acquire a recombined vector; transfecting the recombined vector into a mouse tumor cell strain BaF3; and acquiring the genetically modified cell by antibiotics screening and flow cytometry sorting. The genetically modified cell can provide IFN-gamma producing killer dendritic cells (IKDC) with triple stimulating signals as an instrument for efficiently amplifying and activating the IKDC in vitro. In addition, the genetically modified cell can also be used for antineoplastic immunotherapy research.

The invention discloses a carbon nano-fiber / carbon fiber solid-phase micro-extraction material, a method for preparing the same and a method and a device for manufacturing carbon nano-fiber / carbon fiber solid-phase micro-extraction devices. The carbon nano-fiber / carbon fiber solid-phase micro-extraction material, the methods and the device have the advantages that carbon nano-fibers / carbon fibers can be prepared, and chromatographic analysis processes are provided for detecting plant hormones by means of infusion and micro-enrichment in real time; the carbon nano-fibers are modified on the carbon fibers, so that spatial stereoscopic three-dimensional structures can be formed, active sites can be effectively increased, the enrichment ratios can be increased, and the difficult problem of difficulty in detecting plant hormones in real time due to the low concentration of the plant hormones can be solved.

The invention relates to a preparation method and applications of queen lagerstroemia folium apocyni veneti general flavones. The method adopts a membrane separation technology to extract and separate extract of queen lagerstroemia folium apocyni veneti so as to obtain queen lagerstroemia folium apocyni veneti general flavones; and animal test proves that the queen lagerstroemia folium apocyni veneti general flavones obtained by the method have good preventive and therapeutic effect on Alzheimer's disease, thereby effectively solving the problem of medicament for preventing and treating Alzheimer's disease, realizing prevention and treatment on Alzheimer's disease, and developing new medical value of queen lagerstroemia folium apocyni veneti general flavones.

The invention discloses a totally-enclosed cell and cell factor preparation device which comprises an upper blood bag, a lower blood bag and a thin connecting pipe, wherein the upper blood bag is provided with an anti-coagulation inlet, a plasma sucking port for sucking plasma and an output port for outputting cells and cell factors; the bottom of the upper blood bag is conical; the top of the lower blood bag is conical; and the upper blood bag, the thin connecting pipe and the lower blood bag are formed into a dumbbell-shaped blood collecting bag. The cell and cell factor preparation method comprises the following steps of: introducing anti-coagulation blood, marrow and cord blood into the blood collecting bag, erecting the blood collecting bag on a hard sleeve, putting the hard sleeve into a centrifuge, and starting the centrifuge; separating the lower blood bag from the thin connecting pipe; fully mixing the plasma in the upper blood bag, and extracting the plasma in the upper blood bag for testing platelet concentration; reserving the plasma in the upper blood bag for later use; or centrifuging again to extract a plasma layer, and reserving centrifugally precipitated cells. The invention has the advantages of simplicity and convenience in operation, low loss of platelets, mononuclear cells and cell factors and high enrichment ratio, and obviously improves the safety and practicality.

The invention relates to a method for efficiently enriching ammonia nitrogen ions in water based on a membrane and an electrode, and belongs to the technical field of water treatment. The method for efficiently enriching ammonia nitrogen in wastewater is characterized by comprising the following steps: introducing raw water; connecting a membrane assembly C, setting the flow and stirring; connecting a power supply and setting the current; setting an electrode submerging form and the shape and thickness of the electrode; setting an extraction stopping time ratio and cleaning a membrane assembly; putting into running once again. By adopting the method, ammonia nitrogen in water can be enriched efficiently and organic matters can be separated in a single treatment unit, the defect of insufficient denitrification carbon source in the existing nitrification / denitrification process and a deformation process thereof (such as an oxidation ditch and a BAF (Biological Aerated Filter)) for treating low C / N wastewater and the defect of poor existing NH4<+1> separating and enriching efficiency are overcome, and the problems of oxidation of organic matters in an electrochemical treatment system and insufficient denitrification carbon source are solved. Moreover, the device structure is simple, and convenience is brought to practical operation and running.

The invention relates to an amidoxime-group-modified cyclodextrin / sodium alginate gel ball composite adsorption material which is prepared by combining amidoximated diaminomaleonitrile with an oxygen-containing functional group of sodium alginate and an oxygen-containing functional group of cyclodextrin, so that on the one hand, amidoxime groups are introduced, adsorption sites in gel are increased, and selective adsorption capacity of composite material to hexavalent uranium is greatly enhanced; on the other hand, the sodium alginate and the cyclodextrin enhance the mechanical properties of the material and obtain stronger mechanical properties, so that the material has good mechanical properties, can be repeatedly used for multiple times, is easy to separate from water, and adsorption sites in the composite aerogel are also increased; the composite adsorption material is used for enriching hexavalent uranium, is high in enrichment rate and short in adsorption time, is not influencedby seawater salinity, can be repeatedly used, is easily separated from a water body, and is easy to recover and recycle.

The invention relates to a method for measuring the activity concentration of kalium-subtracted total beta radionuclides in seawater, and the method is characterized in that the method comprises the following steps: (a) adding a cobalt carrier into used seawater, forming cobalt ion solution, adjusting the pH value of the cobalt ion solution to be greater than seven, and then adding thioacetamide into the solution to form cobalt sulfide sediments through reaction; (b) extracting and putting the cobalt sulfide sediments under the temperature from 600 DEG C to 800 DEG C for ashing; (c) adding porphyrized ashing products to a measuring disc, adding an ethyl alcohol sample, and putting the mixture on a flow-gas type proportional counter for measurement and calculation. The method achieves the measurement of beta radionuclides with the enrichment ratio being greater than 95% which is discharged into the seawater in an operation process of nuclear facilities, such as 58Co, 60Co, 59Fe, 65Zn, 110mAg and so on, thereby guaranteeing that the sediments prepared through the method are more uniform and moderate in weight. The detection lower limit is 3mBq / L, so the method is suitable for the monitoring of the activity concentration of kalium-subtracted total beta radionuclides in seawater, and is also suitable for heavy-salt water similar to a seawater sample, and heavy-salt water which contains radionuclides and is obtained through processing.

The invention relates to a method for enriching Cryptosporidium parvum oocysts and Giardia Lamblia sporocysts in water. The method comprises the following steps: adding an inorganic metal salt coagulant into a bulk water sample, stirring, coagulating, precipitating, collecting precipitate alumen ustum in a small-volume container, adding acidic solution into the small-volume container to dissolve the alumen ustum, centrifuging, removing supernate and thus, enriching the Cryptosporidium parvum oocysts and Giardia Lamblia sporocysts in water. In the invention, the problems of low Cryptosporidium parvum oocyst and Giardia Lamblia sporocyst enrichment rate, instability, high operation requirement and expensive filtering equipment and consumable items of the conventional method for enriching Cryptosporidium parvum oocysts and Giardia Lamblia sporocysts. The method does not need expensive apparatus and equipment and medicines and greatly reduce capital investment. The method is simple in operation, easy to master, time-saving and labor-saving, reduces cost of enrichment of Cryptosporidium parvum oocysts and Giardia Lamblia sporocysts in water, improves enrichment efficiency and is a novel method which clears the preliminary work for subsequent steps of immunomagnetic separation, immunofluorescence label microscope counting, polymerase chain reaction (PCR) qualitative detection, nano probe gene chip detection and Real-time PCR quantitative detection and the like.

The invention relates to a full-automatic sample thermal desorption and liquid phase micro-enriching device which comprises a heating device, a condensing device, an enriching device and a controller, wherein the heating device comprises a heating body; a heating slot is formed in the heating body; a quartz sample pipe is arranged in the heating slot; a high-temperature polytetrafluoroethylene pad is arranged at a pipe opening of the quartz sample pipe; a stainless steel pipe is arranged between the heating body and the quartz sample pipe; one end of the stainless steel pipe is arranged in the quartz sample pipe; the other end of the stainless steel pipe is connected with a micro-flow controller; a nitrogen cylinder is connected with the micro-flow controller; a syringe needle is arranged on the high-temperature polytetrafluoroethylene pad; one end of the syringe needle is arranged in the quartz sample pipe; the other end of the syringe needle is connected with the condensing device; the enriching device is connected with the condensing device; electric connecting wires are arranged between the heating body and the micro-flow controller as well as the controller. The full-automatic sample thermal desorption and liquid phase micro-enriching device has the advantages of simple structure, convenience in use, low cost, integrated function of extracting, purifying and condensing, less dosage, short enriching time and higher enriching efficiency.