62 results about "Trace metal" patented technology

The invention relates to the technical field of spectral analysis, and discloses a method and a system for detecting the concentration of trace metal ions. The method comprises the following steps: acquiring original spectral response data of an electronic smoke sample; carrying out signal separation by utilizing a frequency domain feature extraction technology to obtain an initial spectrum data set; performing background noise filtering and baseline drift correction on the initial data to obtain a refined spectrum data set; constructing a concentration-wavelength mapping relation through absorption peak positioning and characteristic wave band screening on the basis of the refined spectrum data set; carrying out continuous time sequence sampling on the samples based on the mapping relation to generate a concentration dynamic change data set; analyzing a concentration fluctuation rule and an abnormal point in the dynamic data, and generating concentration risk assessment data; and finally outputting a time sequence detection file. According to the method, high-precision dynamic monitoring and intelligent risk assessment of trace metal ion concentration are realized, interference is effectively inhibited, and sensitivity and early warning capability are improved.

The invention discloses a method for detecting the content of trace metal ions in a diazo naphthoquinone photosensitizer. The method comprises the following steps: sample pretreatment: weighing diazonaphthoquinone photosensitizer powder in a clean room, putting the diazonaphthoquinone photosensitizer powder into a cleaned and dried wide-mouth PFA bottle, adding an organic reagent, and carrying out ultrasonic treatment until a solid is completely dissolved; the method comprises the following steps: testing: adding a metal standard substance into an organic solvent to prepare three standard solutions with different concentrations; debugging an instrument, determining target metal in the standard solution in a Cool mode, a No Gas mode and a He mode by using an inductively coupled plasma mass spectrometer to obtain a signal intensity value (CPS value) corresponding to each metal ion concentration in the standard solution, and establishing a standard curve; and measuring the sample in which the photosensitizer is dissolved by using the same steps to obtain the content of metal ions in the sample. According to the method, appropriate detection conditions are optimized for different elements to be detected in the diazo naphthoquinone photosensitizer, polyatomic ion interference and matrix effect in a sample are mainly reduced, the content of 16 metal ions can be accurately detected at the same time, and the test efficiency is high.

The utility model discloses a device for separating trace metal from solid waste, which comprises a grinder, a powder mixer, a rotary molten slurry furnace, a pressurizing pipe blowing device, a container and a water cooling tank, the outlet of the grinder is connected with the inlet of the powder mixer, the outlet of the powder mixer is connected with the inlet of the pressurizing pipe blowing device, and the container is connected with the water cooling tank. An outlet of the pressurizing pipe blowing device extends into the rotary molten slurry furnace, an inclined rotating mechanism for controlling the rotary molten slurry furnace to rotate and incline is arranged outside the rotary molten slurry furnace, the rotary molten slurry furnace is provided with a pouring edge opening, the lower part of the edge opening is connected with a container, and the container is conveyed into a water cooling tank through hoisting to cool and shape molten slurry. The solidified and shaped molten slurry is fed into an inlet of a grinding and crushing machine through a spiral conveyor, an outlet of the grinding and crushing machine is connected with a magnetic separator, and metal crushed aggregates obtained by the magnetic separator enter a storage box through a discharging valve; the device disclosed by the utility model can realize recovery of trace metals in high-temperature molten steel slag.

This invention discloses a wheat-specific fertilizer suitable for rice-wheat rotation and its preparation method, comprising the following steps: mixing equal volumes of carboxymethyl chitosan solution, composite biochar dispersion, and agar solution, then adding sodium tripolyphosphate solution dropwise, stirring, allowing to stand, dialyzing, and freeze-drying to obtain hydrogel particles; swelling the hydrogel particles in a mixed aqueous solution of urea and superphosphate, filtering, and vacuum drying to obtain the wheat-specific fertilizer suitable for rice-wheat rotation; this invention uses a coating material to coat composite biochar powder, nitrogen fertilizer, and phosphate fertilizer, and improves the utilization rate of nitrogen and phosphate fertilizer through the slow-release effect of the coating material; by adsorbing fixed trace metal elements through the coating material, the slightly acidic state of the phosphate fertilizer during dissolution is used to convert the adsorbed fixed trace metal elements into a free state, and then titanium aluminum carbide promotes the movement of the free trace metal elements, thereby promoting the absorption and utilization of trace metal elements by wheat roots and improving wheat yield and quality.

The invention discloses a preparation method and application of a degradable cellulose nano-fibril-metal composite material. The preparation method comprises the following steps: S1, preparing a cellulose nano-fibril carrier; S2, chelating metal ions; and S3, carrying out film treatment. The application refers to the application in crop rhizosphere or phyllosphere micronutrient supplement. The invention develops a compound fertilizer system which takes natural cellulose nanofibril as a carrier and chelates trace metal ions through functional groups such as surface carboxyl / hydroxyl and the like, and the compound fertilizer has high specific surface area and stronger metal ion loading capacity; stable loading and slow release are realized through interface adsorption and complexation; the material is completely degradable and is ecological and environment-friendly; the fertilizer can be applied to soil or leaf surfaces and is suitable for various crop types; the process is simplified, and the method has the advantage of convenient industrial popularization.

To more precisely measure the concentration of a trace amount of metal contained in treated water.SOLUTION: An analysis system 300 for analyzing a metal concentration of a liquid includes a pretreatment device 100 for decomposing an organic substance contained in the liquid, and a measurement device 200 for measuring the metal concentration of the liquid in which the organic substance is decomposed by the pretreatment device 100.SELECTED DRAWING: Figure 3

The present disclosure provides methods for determining concentration of various trace metal ions in aqueous solutions, such as gold plating solutions. At a particular fixed reduction potential, the cathodic current can suddenly increase in magnitude after a certain period of time (e.g., an incubation time) passes in the presence of a trace metal ion (e.g., Tl(I)), where the incubation time is inversely proportional to the concentration of trace metal in the electrolyte. The concentration of the trace metal can be calculated after measuring the incubation time and comparing it against a calibration curve.

The present disclosure relates to a process of treating an aqueous stream from an industrial process. Specifically, the disclosed process reduces the cyanide-containing impurities and trace metal contaminants from the aqueous stream, such as to facilitate subsequent biological treatment, hydrogen gas generation by electrolysis or direct water recycle for reuse.

The invention provides a method for improving metalized binding force of quartzite by combining strong cleaning with a glass transition layer. The method comprises the following steps: S1, pre-cleaning a quartzite substrate; s2, a SiO2 glass transition layer is deposited on the surface of the cleaned quartzite substrate through magnetron sputtering; s3, carrying out annealing and curing treatment on the substrate on which the SiO2 glass transition layer is deposited; s4, sequentially depositing a TiW adhesion layer and a Cu functional layer on the surface of the cured SiO2 glass transition layer; and S5, carrying out spin coating, exposure, development, electroplating thickening and etching on the Cu functional layer to form a metalized pattern. By introducing the strong chemical cleaning step, trace metal impurities on the surface of the quartz stone can be specifically and efficiently removed, the substrate surface with ultrahigh cleanliness and high surface energy is obtained, and weak binding force points caused by interface pollution are fundamentally eliminated.

The invention discloses a method for detecting trace metal elements in a liquid sample by combining laser processing enrichment substrate with high repetition frequency scanning LIBS (laser-induced breakdown spectroscopy), which comprises the following steps of: preparing micro-structure hydrophilic enrichment points with controllable size and high consistency on a super-hydrophobic surface by utilizing a laser processing technology; uniform, repeatable and highly controllable evaporation and enrichment of a liquid sample in form and size are realized, evaporation residues of the liquid sample are analyzed by combining high repetition frequency pulse laser, the whole sample residual area is covered by focus scanning, analysis result variation caused by sample non-uniformity is reduced to the greatest extent, and the analysis accuracy is improved. And sensitive and high-repeatability element analysis is realized.

The invention discloses an application of an OsYSL12 gene or a protein coded by the OsYSL12 gene in increasing the content of metal trace elements in rice grains, and belongs to the technical field of gene engineering. The rice OsYSL12 gene involved in the invention is derived from cultivated rice Nipponbare. According to the invention, an OsYSL12 gene in rice is knocked out; through detection, a homozygous knockout mutant of the OsYSL12 is obtained. The yield of a single plant of different mutants is not obviously different from that of a wild type, but the content of metal trace elements manganese, zinc and copper in brown rice is obviously increased compared with that of a contrast, so that the brown rice has better nutritional quality. Therefore, the method for knocking out the rice OsYSL12 gene to strengthen the metal trace elements in the grains, provided by the invention, has an important application value and can generate good economic benefits.

The invention relates to the technical field of a produced liquid stratum source identification method, in particular to a method for judging an oilfield produced liquid stratum source, which comprises the following steps of: calculating the similarity S1 between a crude oil trace metal element fingerprint spectrum of a sample to be determined and a crude oil trace metal element standard fingerprint spectrum of a target stratum; the similarity S2 between the stratum water trace metal element fingerprint spectrum of the sample to be determined and the stratum water trace metal element standard fingerprint spectrum of the target stratum is calculated, if the S1 and the S2 are both larger than 0.9, the produced liquid from the stratum to be determined comes from the target stratum, and if the S1 and the S2 are not larger than 0.9 at the same time, the produced liquid from the stratum to be determined does not come from the target stratum. According to the method, the trace metal element composition of the crude oil and the formation water in the produced liquid is converted into the trace metal element fingerprint spectrum for the first time to determine which formation the produced liquid comes from, so that the difference information of the crude oil and the formation water in the produced liquid can be more intuitively reflected, and the accuracy of judging the source of the produced liquid is improved.

The present disclosure relates to an apparatus for treating an aqueous stream from an industrial apparatus. Specifically, the disclosed apparatus reduces the cyanide-containing impurities and trace metal contaminants from the aqueous stream, such as to facilitate subsequent biological treatment, hydrogen gas generation by electrolysis or direct water recycle for reuse.

This invention belongs to the field of scintillator material preparation technology, specifically relating to a method for purifying high-purity cesium iodide and its application in the preparation of cesium iodide scintillator screens. The method involves sequentially mixing and heating cesium iodide-containing waste and residual materials to dissolve them, filtering and removing impurities, adsorption and removing impurities, concentrating and temperature-controlled crystallization, centrifuging, drying, and vacuum packaging. This process comprehensively removes solid particulate impurities, elemental iodine, and various trace metal ions from the raw materials, effectively preventing oxidation and deterioration during purification. The method is simple to operate, highly industrially feasible, and can purify waste materials to a high purity level that meets the requirements of high-performance applications. It allows for the reuse of waste materials at the same purity level, reducing production costs, alleviating raw material supply pressure, and complying with environmental protection requirements. Applying the high-purity cesium iodide obtained by this method to the preparation of cesium iodide scintillator screens using a vacuum thermal evaporation process ensures the excellent performance of the scintillator screens, making them suitable for high-end fields such as medical imaging and non-destructive testing.

The invention discloses a method for detecting the content of trace metal elements in electronic-grade potassium hydroxide, and belongs to the technical field of electronic chemical detection. The detection method comprises the following steps: diluting an electronic-grade potassium hydroxide sample, and detecting the contents of 27 trace metal elements in the electronic-grade potassium hydroxide by adopting a standard addition method and combining an octupole collision / reaction tank technology with an inductively coupled plasma mass spectrometer. The method has the advantages of simplicity and convenience in operation, high sensitivity, high accuracy, wide linear range, strong anti-interference capability and the like, can effectively detect the content of trace metal ions in the electronic-grade potassium hydroxide, and provides powerful technical support for quality control of the electronic-grade potassium hydroxide.

A method of regulating metal homeostasis includes identifying an aptamer having an affinity for a target trace metal, and introducing the aptamer to the target trace metal for sequestering metal ions of the target trace metal to generate a bound aptamer. The bound aptamer may then be directed (injected, ingested, or expunged) around a patient physiology for manipulating the sequestered metal ions based on therapeutic directives. When a harmful metal is to be mediated, the aptamer is directed to a physiological region for sequestering metal ions for removal. When a deficient presence is to be increased, the bound aptamer is directed to a physiological region for increasing the presence of the target trace metal in the physiological region. The trace metals may include metals and metalloids such as iodine, copper, iron, manganese, zinc, selenium, cobalt and molybdenum.

The application relates to the technical field of inorganic high-purity powder material preparation, in particular to a continuous preparation process of high-purity magnesium oxide particles, the purity of the magnesium oxide particles is not less than 99.95%, the D50 particle size is 1.8-2.1 mu m, the particle size distribution span is 0.70-0.85, the total content of trace metal impurities is 2.1-4.2 ppm, the thermal weight loss rate is 0.04%-0.08%, and the bulk density is 0.48-0.55 g / cm 3 3 . The application adopts a continuous production mode, replaces a traditional batch process, realizes whole-process continuous operation of raw material feeding, reaction, crystallization, washing, drying, calcination and grading, greatly improves the stability and uniformity of a production process, eliminates batch quality differences, and adapts to industrial large-scale production requirements.​

The utility model discloses a powder coating trace metal impurity removing and sorting device which comprises a filtering cylinder, a first filtering plate and a second filtering plate, cylinder covers are installed at the two ends of the filtering cylinder, a discharging opening is formed in the lower half portion of the filtering cylinder, the first filtering plate is arranged in the discharging opening, a groove body is installed in the center of each cylinder cover, and a plurality of grooves are formed in the groove body. A collecting shell is arranged in the groove body and the shaft hole, an annular groove is formed in the inner side face of the cylinder cover, a ring body is movably arranged in the annular groove, the two ends of the second filter plate are installed on the ring body, and a driving mechanism for driving the ring body to rotate is installed on the cylinder cover. The powder coating filtering device is simple in structure, filtering can be rapidly conducted through combination of the first filtering plate and the second filtering plate, along with rising of the second filtering plate, powder coating can be filtered, metal impurities are intercepted, after the second filtering net rotates to a certain angle, the metal impurities can automatically slide into the collecting shell along the inclined second filtering plate, and the powder coating filtering device is convenient to use. And impurities can be conveniently collected.

The invention discloses a method for determining trace metal impurities in electronic-grade hydroxylamine, which comprises the following steps: diluting a hydroxylamine sample by preparing a composite extracting solution which has a pH value of 5.5 + / -0.2 and contains ammonium citrate, ammonium acetate and EDTA (Ethylene Diamine Tetraacetic Acid), effectively inhibiting hydroxylamine decomposition and stabilizing metal ions, and determining trace metal impurities in electronic-grade hydroxylamine by combining a triple quadrupole inductively coupled plasma mass spectrometry technology. The interference of polyatomic ions is eliminated by utilizing the cooling atomization and dynamic reaction tank functions, and finally, quantification is performed by adopting a matrix-matched standard curve method. The method solves the technical problems of low metal ion detection recovery rate and poor accuracy caused by chemical instability of electronic-grade hydroxylamine, has the advantages of safety in operation, high sensitivity, stable recovery rate and the like, and provides a reliable analysis means for quality control of key chemicals in a semiconductor manufacturing process.

The invention belongs to the field of biomedical engineering materials, and aims to provide a biodegradable bone repair material capable of 3D printing and a preparation method thereof. Biological 3D printing is an emerging subject of additive manufacturing and biomedicine cross fusion, and the tissue engineering scaffold obtained through biological 3D printing has good biocompatibility and excellent biological activity. The degradable bone repair material and 3D printing are combined. Degradable polylactic acid and an inorganic biological material are fused, polycaprolactone-ZnO is subjected to electrostatic spinning to enhance the supporting strength of the material, and meanwhile hydroxyapatite and trace metal elements needed by bone tissue growth are added. In clinical application, the bone repair material plays a supporting role in cell division and new tissue generation. In clinical application, the bone repair material plays a supporting role in cell division and new tissue generation. Along with gradual degradation of the repair material in a living body, the degradation product does not generate host reaction to the living body, and meanwhile, secondary trauma and medical cost caused by the fact that a patient needs to carry out a secondary operation to take out an implant material after bone repair are reduced.

The invention relates to the technical field of functional ceramic products, in particular to original degerming and moisturizing functional ceramic and a preparation method and a use method thereof.The functional ceramic is formed by firing natural mineral argil, and the natural mineral argil is naturally enriched with at least two trace metal elements of iron, copper, zinc and manganese needed by human metabolism; the porosity of the body of the functional ceramic is 15-30%, and the functional ceramic is used in cooperation with food to be heated in a microwave oven heating scene. According to the invention, natural mineral argil is taken as a raw material, and through structural design and process optimization, triple functions of moisturizing, nutrition supplement and sterilization in a microwave oven heating scene are realized, so that the core pain point of food moisture loss is solved, trace elements required by a human body are safely supplemented, and meanwhile, the safety of food after heating can be improved; the product is stable in preparation process and convenient to use, and has high practical value and market prospect.

The present invention relates to a process for isolating Extracellular Vesicles (EV) secreted by microalgae (MEV – microalgae extracellular vesicle) cultured in basal and stress environment conditions namely pH, salinity, light, nutrient starvation, and temperature. Additionally, microalgae can be cultivated in thermal water classified as bicarbonate, sulphate, sulphide, chloride, or weakly mineralized trace metal. The present invention also relates to compositions comprising said MEV, which are useful to be applied to therapeutic, cosmetic, nutraceutical, phytopharmaceutical and medical including veterinary applications. The present invention lays in the technical domain of pharmaceuticals, medicine, cosmetics, nutraceutical, veterinary and research and development in cellular biology and appliances thereof.

The invention discloses a pretreatment method for trace metal impurity detection of a high-purity electronic-grade silicon-based precursor material. The method comprises the following steps: heating and volatilizing a liquid sample in an ultrapure PTFE / PFA beaker, and redissolving by using an electronic-grade inorganic acid-organic acid composite acid system; uniform heating is achieved through a special heating plate, pretreatment volatile organic waste gas is treated in cooperation with a hundred-grade dust-free environment, a clean operation table and a tail gas condensation and collection system, meanwhile, metal impurity concentration of different degrees can be achieved through the proportion of the use amount of a pretreatment sample to the use amount of redissolved inorganic acid, the detection limit is effectively reduced to 1-5 ppt, and the detection efficiency is improved. The recovery rate of the metal impurity detection pretreatment method reaches 85%-115%. The method breaks through the defects of long pretreatment time, silicon and carbon residues, metal loss caused by severe pretreatment reaction and the like of a traditional hydrolysis and digestion method, the treatment time is shortened to 2-4 hours, the G4 / G5 level (single metal 1t, 10ppt) detection requirement is effectively met, and a high-sensitivity and low-background-interference detection scheme is provided for impurity management and control of a high-purity silicon-based precursor in an advanced process.

The invention relates to a method for detecting the content of trace metal ions in electronic-grade tetramethoxysilane, which comprises the following steps of: a) removing a silicon substrate in the electronic-grade tetramethoxysilane by adopting a pretreatment method to prepare a sample solution; b) preparing at least six groups of standard solutions with different ion concentrations of metal elements to be detected by adopting the reagent obtained in the step a); c) determining the standard solution obtained in the step b) by using an inductively coupled plasma tandem mass spectrometer to obtain a CPS count value corresponding to each ion concentration of the standard solution; d) fitting a standard curve of'ion concentration-CPS count value 'of the metal element to be measured; and e) determining the sample solution treated in the step a) by using an inductively coupled plasma tandem mass spectrometer to obtain a CPS count value of each metal ion to be detected, and calculating the concentration of each metal ion in the sample to be detected according to the standard curve fitted in the step d). The method is high in analysis speed, good in accuracy and high in precision.

The invention relates to the technical field of environmental protection, and discloses a lead zinc ore tail water innocent treatment method and system.The lead zinc ore tail water innocent treatment method comprises the steps that a static semiconductor strong electrolysis technology is adopted to conduct pretreatment on lead zinc ore tail water, and volatile pollutants are removed; generating free radicals through an electrochemical micropore negative charge aeration technology to form trace lead compounds and zinc compounds; carrying out acidic micro-electrolysis treatment by adopting an electrochemical micropore negative charge aerobic acidic micro-electrolysis reaction kettle technology; chlorine dioxide micropores are adopted for slow-release disinfection treatment; performing static precipitation to obtain supernate and bottom mud; further oxidizing the bottom mud by adopting solid hydrogen peroxide particle micropore slow release; a flotation column is adopted for rinsing and enriching, and treatment of a multi-stage desliming bucket suspension separator is included; purifying by adopting magnetic separation or a shaking table, discharging and stacking tailings, and enriching and recovering trace metal elements in the tail water by adopting nematophilic bacillus organisms; and the tail water is recycled. The lead-zinc ore tail water is treated through the static semiconductor strong electrolysis module and the electrochemical micropore negative charge aeration module, and efficient removal of pollutants is achieved.

1. The name of the design product: trace metal content analyzer. 2. The use of the design product: trace metal content analyzer for laboratory. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view 1. 5. The design claimed contains color.

The application provides a silicon substrate digestion solution, a detection method and a kit for trace metal impurities in organosilane. The silicon substrate digestion solution comprises, by mass fraction, 1-10 parts of hydrofluoric acid, 1-3 parts of hydrogen peroxide and 1-5 parts of water. The silicon substrate digestion solution provided by the application can completely digest organosilane to obtain a sample solution through the cooperation of the specific mass ratio of hydrofluoric acid, hydrogen peroxide and water, and when the sample solution is subjected to trace metal impurity detection, the sample solution will not block the atomizer nozzle and contaminate the atomization chamber, which is conducive to maintaining the precision and service life of the detection equipment, and the sample solution is not easily affected by the operation environment to introduce impurities, and the detection precision of trace metal impurities is further improved.

The application discloses a method for high-selectivity recovery of beryllium from lithium smelting beryllium-containing clinker, and belongs to the technical field of beryllium-containing solid waste resource utilization. After the lithium smelting beryllium-containing clinker is crushed, slurry is prepared, and under the shearing action, concentrated acid is slowly added dropwise to the slurry to precisely control the pH of the slurry in the range of 3.0-3.5 to perform reaction. After the reaction is completed, solid-liquid separation is performed to obtain beryllium-containing filtrate. The beryllium-containing filtrate is subjected to precipitation by using a sodium hydroxide solution to precisely control the end-point pH of the beryllium-containing filtrate in the range of 8.5-9.0, and a composite precipitate containing beryllium hydroxide and potassium sodium cryolite is obtained. The method completely breaks the traditional situation of 'waste production waste', not only realizes efficient separation of the highly toxic beryllium, but also directly converts the beryllium-containing solid waste into 'rich beryllium potassium sodium cryolite composite concentrate' with a main phase of crystalline potassium sodium cryolite and a beryllium grade of more than 5.5%, realizing double high-value extraction of trace metals (beryllium) and bulk minerals (cryolite).

The invention discloses a bamboo-stalk bamboo induced regeneration culture medium and an induction method thereof, and relates to the technical field of plant biologication.The bamboo-stalk bamboo induced regeneration culture medium comprises trace metal elements in an exchangeable coordination state, a quinone trapping agent, a recyclable reduction couple and an antioxidant synergist; the recyclable reduction pair comprises ascorbic acid, salts and a reduced sulfur source, and reacts with the phenol oxidation product in the culture medium to reduce the phenol oxidation product into an original form; according to the phenol load index, the equivalent weight of trace metal elements, the concentration of a quinone trapping agent and the proportion of recyclable reduction pairs are dynamically adjusted; the phenol load index is determined through the absorbance or the total phenol equivalent of the short-time extraction liquid of the explant. According to the method, the adaptability, the survival rate and the regeneration efficiency of the explant are effectively improved by dynamically adjusting the components of the culture medium and accurately controlling environmental factors, and the condition that the explant obtains optimal nutrient support in different growth stages is ensured, so that healthy growth and efficient regeneration of the bamboo stalk bamboo explant are promoted.

The application discloses a kind of silting feed and its preparation method and application, the feed includes: plant feed powder 60-75 parts, polyphenol active ingredient 5-13 parts, trace metal element component 3-8 parts, organic-inorganic hybrid microcapsule structure carrier 4-9 parts, valence self-locking agent 1-5 parts, synergistic slow-release agent 2-6 parts and auxiliary material 2-8 parts;Microcapsule structure carrier is formed by organic macromolecule and inorganic nanomaterial co-deposition, polyphenol active ingredient is embedded into the inside of carrier, metal ion forms gradient distribution layer on the surface and skeleton of carrier, valence self-locking agent is coordinated with metal ion, synergistic release agent is compounded with microcapsule structure, and slow-release network is formed.The technology breaks through the technical barrier that metal ion and phenolic active ingredient synergistically catalyze oxidation inactivation, realizes the partition embedding and gradient controllable release of functional component, and guarantees the functionality and biological adaptability in the whole process of feed processing, storage and feeding.