439 results about "Dissolution" patented technology

The invention discloses a mine water recharge reservoir scaling trend prediction, scale removal and permeation enhancement method, and the trend prediction method comprises the steps: carrying out the conventional physicochemical index analysis of the water quality of mine water and a monitoring well according to the hydrogeological information of a recharge reservoir, and calculating the scaling trend of the mine water recharge reservoir based on a Retino index method and the relative saturation R.S. The scaling conditions of carbonate, sulfate and silicate are rapidly judged respectively; when scaling occurs, the ion concentration change on a path is revealed through a Transport module and an Equilibrium Phases module in the PHREEQC software, and verification is carried out through a measured value of a monitoring well; and then according to the mineral dissolution precipitation reaction and the percentage of the reservoir rock sample composition, calculating the reaction dose and the void ratio so as to formulate a mine water recharge reservoir permeation enhancement optimization scheme. According to the method, the scaling trend of the mine water recharge reservoir can be effectively predicted, the recharge process is monitored, and continuous operation of deep well recharge sealing work of mine water is facilitated.

The invention provides a method for realizing dynamic balance of source water minerals based on ion coordinated regulation and control, and belongs to the technical field of water treatment. According to the method, multi-parameter coupling regulation and control are achieved by conducting split-flow pretreatment on source water and building a dynamic synergistic coefficient model, the source water is separated to prepare calcium-magnesium compensation liquid, the ion concentration and the water temperature are monitored in real time, and a synergistic coefficient model fusing ion activity factors and the temperature effect is built; a fuzzy PID controller is used for dynamically analyzing pH fluctuation and collaborative deviation to adjust the injection proportion of compensation liquid, and precise mineralization is achieved by combining turbulence mixing intensity optimization; a closed-loop feedback mechanism and a high-frequency liquid supplementing technology are adopted to quickly correct ion concentration deviation, and the dissolution activity of compensation liquid is differentially regulated and controlled through a reverse temperature difference strategy so as to stabilize pH. According to the method, the ion synergistic effect, dynamic algorithm control and dissolution kinetics optimization are combined, the response speed and balance precision of water quality regulation are improved, and the method is suitable for precise mineral regulation and quality optimization of high-quality drinking water.

The invention relates to the technical field of image data processing, in particular to a water-soluble fertilizer dissolution rate visual measurement method and system, and the method comprises the steps: obtaining a sequence image of a dissolution process; performing multi-scale frequency domain analysis on the image, and calculating a scale convergence index by using the deviation between a local phase and a weighted average phase; a spectral sharpness factor is calculated according to the ratio of the high-frequency energy response to the low-frequency energy response; fusing the scale convergence index and the spectral sharpness factor to obtain a solid boundary probability; segmenting the particle region based on the probability and converting the particle region into physical mass, and differentiating a mass change sequence to obtain a dissolution rate. By fusing the phase consistency and the frequency domain energy distribution characteristics, the physical entity edge and the optical refraction halo are effectively distinguished, the refraction interference problem during high-concentration dissolution is solved, and the dissolution rate measurement accuracy is improved.

Targetry coupled separation refers to enhancing the production of a predetermined radiation product through the selection of a target (including selection of the target material and the material's physical structure) and separation chemistry in order to optimize the recovery of the predetermined radiation product. This disclosure describes systems and methods for creating (through irradiation) and removing one or more desired radioisotopes from a target and further describes systems and methods that allow the same target to undergo multiple irradiations and separation operations without damage to the target. In contrast with the prior art that requires complete dissolution or destruction of a target before recovery of any irradiation products, the repeated reuse of the same physical target allowed by targetry coupled separation represents a significant increase in efficiency and decrease in cost over the prior art.

The invention belongs to the technical field of iron ion detection, and particularly relates to a rapid detection method for ferric ions in water, which comprises the following steps: a fluorescent probe preparation step: taking trihydrate of copper nitrate and tryptamine, adding into a centrifuge tube in sequence, adding ultrapure water, performing ultrasonic dissolution, transferring into a high-pressure reaction kettle, and performing hydrothermal reaction to obtain a fluorescent probe; cooling to room temperature, centrifuging the obtained yellow green solution in a centrifugal machine, and filtering the supernate through a microfiltration membrane to obtain a copper-doped carbon quantum dot CuCDs stock solution, namely the fluorescent probe; analyzing and determining Fe < 3 + >: taking the diluent of the prepared CuCDs solution, adding the diluent into a centrifugal tube containing a Fe < 3 + > standard solution, uniformly mixing, carrying out fluorescent quantitative analysis and detection, and exploring the change rule of the fluorescence intensity ratio of CuCDs; according to the rapid detection method for Fe < 3 + > provided by the invention, the synthesized CuCDs have high sensitivity, can realize on-site rapid detection of Fe < 3 + > in a water medium, and shows a wide application prospect in the field of environmental monitoring.

The invention belongs to the technical field of ferrous metallurgy, and particularly relates to a method for determining dissolution kinetics of solute in metallurgical slag based on molecular dynamics simulation, compared with a traditional experimental method, molecular dynamics simulation does not need a large number of thermal state experiments and complex detection modes, and large-scale simulation calculation can be rapidly completed on a computer. And meanwhile, various different conditions can be simulated in a short time, and superior processes and slag systems can be quickly screened out. According to the method, the reaction which is difficult to observe clearly can be visualized, the atomic trajectory behavior of the dissolution behavior, the dynamic change, the dispersion process of the solute and the like are provided, rich and accurate information is provided for research on dissolution kinetics, and the dissolution rule and the structure evolution mechanism of the solute in the high-temperature melt can be revealed. In addition, the method is high in safety, and danger possibly brought by a high-temperature experiment is avoided.

The invention relates to a method for recovering platinum in nickel-platinum waste. The method comprises the steps of hot nitric acid dissolution, filtration, pH adjustment, selective precipitation and drying. The characteristic that hot nitric acid can completely dissolve Ni and partially dissolve Pt is utilized to achieve preliminary separation of NiPt, sodium sulfide is used as a precipitator, selective precipitation of platinum is achieved through the Ksp difference of platinum sulfide and base metal sulfide within the pH range of 1-2, the recovery rate of platinum is greatly increased, and energy consumption of the platinum recovery process is reduced. Emission of a large amount of volatile acid is avoided while economic benefits are improved, and the method is more suitable for actual production.

The invention discloses a detection method for rapidly determining the main content of magnesium hydroxide and calcium oxide in the process of preparing high-purity magnesium hydroxide from salt lake bischofite, which comprises the following steps: determining the main content of magnesium hydroxide: weighing a proper amount of sample, dissolving with hydrochloric acid and fixing the volume to obtain a test solution; taking a proper amount of the test solution, adding triethanolamine to mask interfering ions, adjusting the pH value with an ammonia-ammonium chloride buffer solution, taking chrome black T as an indicator, and titrating the main content of magnesium hydroxide with an EDTA standard solution; and measuring the content of calcium in magnesium hydroxide: taking a proper amount of the test solution, adding triethanolamine to mask interfering ions, adjusting the pH value by using a sodium hydroxide solution, adding a proper amount of a calcium indicator, and titrating the content of magnesium calcium hydroxide by using an EDTA standard solution. The method is simple and easy to implement, can quickly and accurately analyze and detect the main content and the calcium oxide content in the magnesium hydroxide, can realize complete dissolution of the magnesium hydroxide, and does not artificially introduce a large number of impurity elements, so that the system error is reduced, and the detection quality is improved.

A composite oil phase and composite emulsion matrix for site-mixed emulsion explosive and preparation methods therefor. The composite oil phase is divided into material A and material B, wherein in the material A, a high-viscosity polyisobutylene maleic anhydride amine esterification derivative is used as a primary emulsifier to increase the strength and thickness of an emulsification film of an emulsion matrix, thereby improving the stability of the emulsion matrix; in the material B, a low-viscosity polyisobutylene maleic anhydride amine esterification derivative and SP-80 are used as primary emulsifiers to regulate the ammonium nitrate dissolution rate of the emulsion matrix, thereby improving the sensitization characteristic of the emulsion matrix; and the emulsion matrix prepared from two composite oil phases can effectively improve the water resistance of the emulsion matrix while the problems of high-temperature over-sensitization and low-temperature insensitivity are solved, so that the explosion quality is guaranteed.

The invention discloses a method for measuring the content of calcium fluoride in dolomite-containing fluorite mine. The method comprises an acetic acid solution, a hydrochloric acid solution, a triethanolamine solution, a potassium hydroxide solution and boric acid. The method for measuring the content of calcium fluoride in the dolomite-containing fluorite mine comprises the following steps: S1, reagent proportioning; s2, preparing a calcium standard solution; s3, preparing an EDTA standard titration solution; s4, selecting an instrument; s5, preparing a sample; s6, step analysis; s7, content correction and determination; and S8, calculating a result. The invention belongs to the technical field of calcium fluoride content determination, and particularly relates to a method for measuring the content of calcium fluoride in dolomite-containing fluorite mine, compared with the prior art, the method solves the problem of dolomite dissolution when calcium carbonate is leached by acetic acid, and the content of calcium fluoride in the fluorite mine can be measured by accurately calculating the dissolution amount of dolomite. The measured calcium fluoride content is clearer, more reasonable and more reliable and approaches to a true value, and the process operation is simple and rapid, and is suitable for the requirements in the fields of mine production, assay detection and the like.

The invention belongs to the technical field of hydrogen sulfide stress corrosion resistance detection of oil well pipes, and particularly relates to a method for testing the influence of anodic dissolution in saturated hydrogen sulfide on stress corrosion fracture of an oil well pipe, which comprises the following steps: respectively carrying out slow strain rate tensile tests in a saturated hydrogen sulfide environment and a nitrogen environment to obtain a stress-strain curve of an oil well pipe sample; measuring a hydrogen permeation curve of the oil well pipe sample in the saturated hydrogen sulfide environment; carrying out fast and slow sweep potential polarization curve test and hydrogen permeation curve test on the oil well pipe, and carrying out hydrogen charging-slow stretching test on the oil well pipe under the cathode hydrogen charging potential corresponding to the steady-state hydrogen permeation current density; and according to the damage degree of the saturated hydrogen sulfide environment to the mechanical properties of the oil well pipe, the minimum influence degree of hydrogen in the saturated hydrogen sulfide environment to the stress corrosion fracture of the oil well pipe is determined by combining the damage degree of hydrogen separated out from the cathode reaction to the mechanical properties of the oil well pipe. The device has the advantages of simplicity in operation and accurate measurement result.

The invention relates to the technical field of novel material chemical analysis, and discloses a triphenyl phosphate purity standard substance valuing method, which comprises the following steps: filtering, drying, dissolving and sterilizing a triphenyl phosphate sample; a triphenyl phosphate sample is comprehensively analyzed from different angles by comprehensively applying a GC-MS (Gas Chromatography-Mass Spectrometry) technology, an NMR (Nuclear Magnetic Resonance) technology, an infrared spectroscopy, a gas chromatography-flame ionization detector method, a Karl Fischer method and an inductively coupled plasma mass spectrometry, and finally, the purity value of the triphenyl phosphate purity standard substance is calculated by a mass balance method. The method provides a scientific and accurate technical means for quality control and standard formulation of the triphenyl phosphate product, has important practical application value for related industries in the fields of chemical engineering and material science, and is beneficial for improving the product quality and promoting industrial upgrading.

The invention discloses a method and system for predicting well wall fracture and instability of a salt-bearing stratum, and the method comprises the steps: respectively calculating and obtaining three drilling fluid densities through the quantitative prediction of the creep rate, collapse pressure and well drilling induced joint extension of the salt-bearing stratum, and controlling and determining an optimal drilling fluid density range through the three drilling fluid densities. The salt concentration required by the drilling fluid capable of inhibiting salt rock dissolution is calculated, so that drilling parameters of the salt-bearing stratum are optimally designed, the density range of the drilling fluid of the salt-bearing stratum and the upper limit value of the degree of mineralization of the drilling fluid are determined by comprehensively considering various factors such as the salt rock creep rate, the dissolution rate, stratum collapse and induced fracture generation, and the drilling parameters of the salt-bearing stratum are optimized. Well control safety in salt-containing formation drilling is ensured, underground complexity is avoided, the drilling speed is increased, meanwhile, secondary disasters such as environmental pollution and waste of human, property and material are avoided, and on the basis of the method, the safety of salt-containing formation drilling can be improved, the drilling speed can be increased, the development process of oil and gas resources can be enhanced, and energy safety can be promoted.

The invention discloses a method for measuring the content of impurity elements in high-purity quartz by ICP-MS (Inductively Coupled Plasma Mass Spectrometry). The method is characterized by comprising the following steps: S1, drying a sample; s2, weighing a sample; s3, primary dissolution with strong acid I; s4, secondary dissolution with strong acid II; s5, cooling and constant volume; and S6, respectively testing and analyzing the standard series working solution, the sample solution and the blank solution on ICP-MS (Inductively Coupled Plasma Mass Spectrometry). According to the method, the influence of impurity elements brought in in the sample treatment process on the determination result is reduced, the harm of precipitation generated by some metal ions and chloride ions on the accuracy of the result is avoided, the inductively coupled plasma mass spectrometer is adopted for analysis in the later period, the detection limit is greatly reduced, and the accuracy of the result is improved. Therefore, the purposes of reducing the lower limit of impurity element content measurement and increasing the upper limit of the silicon dioxide content range (the applicable silicon dioxide content range of the method can be higher than 99.99%) are achieved.

The invention relates to a ferrous sulfide cleaning method based on a ferrous sulfide cleaning device, and belongs to the technical field of petrochemical engineering treatment equipment. The method specifically comprises the steps that inspection preparation work before operation is conducted, a PLC control system injects industrial water and passivating agent liquid into a dissolving tank according to a given proportion, an electric pump B is started, the electric pump B can continuously supply liquid into equipment to be cleaned, meanwhile, a solution at the bottom of the equipment to be cleaned flows back into the dissolving tank, and the solution circularly enters and exits from the equipment to be cleaned; and according to the detected parameter change of the iron ion on-line monitor, the PLC control system automatically judges that the cleaning is finished when the change of the iron ion content does not exceed 10% in the latest two hours after the circulating cleaning is performed for 12 hours. The problems that manual matching control of industrial water and passivating agent liquid is not accurate, the iron ion content and the PH value cannot be analyzed on line, whether passivation cleaning is qualified or not cannot be automatically judged, and manual labor investment is large are solved.

The invention provides a method for determining boron element in iron ore, which comprises the following steps: weighing 0.2 g of sample, uniformly mixing with a flux, heating to red at 700-800 DEG C, cooling, adding sodium peroxide for secondary melting, dissolving in water, and transferring to a beaker; adding ethanol to boil, fixing the volume to 500mL, filtering and taking 100mL, adjusting the pH value, adding hydrogen peroxide to slightly boil, cooling, adding barium carbonate to boil, diluting and filtering, and taking 25mL for color development determination. According to the method, sodium carbonate and / or potassium carbonate and sodium peroxide are adopted to form a composite flux, an iron ore sample is completely decomposed through secondary melting and step-by-step dissolution, and the sample decomposition efficiency is improved; the method is stable in recovery rate, is superior to a conventional method in precision, can accurately measure the boron content in the iron ore, meets the technical requirements on boron element detection in the fields of ferrous metallurgy, geological exploration and the like, provides an efficient and reliable detection means for boron content analysis, and ensures the accuracy and reproducibility of a detection result.

The invention relates to an ion transport performance evaluation method and device, computer equipment, a storage medium and a computer program product. The method comprises the following steps: acquiring transport process simulation parameters determined based on a transport interface structure of dissolved ions; based on the transport process simulation parameters and a target machine learning force field obtained by training according to a transport interface structure of the dissolved ions in advance, carrying out molecular dynamics simulation on a dissolution process of the dissolved ions on the transport interface to obtain dissolution stress information of the dissolved ions; and determining an ion transport performance evaluation result of the dissolved ions according to the dissolution stress information. By adopting the method, the calculation cost can be reduced, and the ion transport performance evaluation rate can be improved.

The invention discloses a method for preparing an impurity content test solution in titanium tetrachloride by a sulfuric acid method and a detection method, and belongs to the technical field of component detection and analysis. The preparation method and the detection method comprise the following steps: adding water into a titanium tetrachloride sample to react until a precipitate is dissolved and no thick white smoke is generated; heating and evaporating the obtained product to dryness under the condition that the temperature is not higher than 100 DEG C; then adding a sulfuric acid solution and a proper amount of water, heating under the condition that the temperature is not higher than 200 DEG C until the titanium matrix is completely dissolved to obtain a clear and transparent solution, and adding water to dilute and fix the volume to obtain a titanium tetrachloride impurity content test solution with the sulfuric acid concentration being less than 2%; and determining the impurity content in the solution by adopting ICP-MS or ICP-OES. The method disclosed by the invention is simple to operate, effectively avoids the pollution risk of external elements, and reduces the operation error, thereby greatly improving the accuracy and reliability of an analysis result.

The invention relates to the technical field of underground hydrogen storage, and discloses an underground hydrogen storage prediction method coupled with a chemical reaction. The method comprises the following steps: determining the hydrogen leakage flux of the underground hydrogen storage according to reservoir information of the underground hydrogen storage based on the Darcy law; according to three-phase substances including mineral composition, solution composition and gas composition of the underground hydrogen storage, a physical model containing a mineral-fluid-gas storage three-phase substance equilibrium relation of the underground hydrogen storage is established by utilizing the law of conservation of substances; according to the dissolution trends of different minerals in the underground hydrogen storage under the hydrogen-fluid-rock chemical reaction system, a dissolution kinetic model of the different minerals is established; and according to the hydrogen leakage flux, the coupling physical model and the dissolution kinetic model, obtaining the change conditions of mineral composition, solution composition and gas composition in the underground hydrogen storage library caused by hydrogen-fluid-rock chemical reaction under the hydrogen leakage flux, so as to predict the hydrogen storage condition of the underground hydrogen storage library.

The invention relates to the field of modern processing of traditional Chinese medicines, and particularly provides a low-temperature crushing preparation process and application of a traditional Chinese medicine composition. According to the process, medicinal materials are pre-frozen at the temperature of-40 DEG C to-30 DEG C to be subjected to glassy transition, and the synergistic effect of vortex airflow crushing and a high-frequency ultrasonic field under the protection of liquid nitrogen is combined, so that the crushing temperature is controlled to be less than or equal to-30 DEG C, and the ultrafine particle size D90 is less than or equal to 15 microns. Meanwhile, a three-stage gradient cold trap (-80 DEG C,-120 DEG C and-196 DEG C) is adopted to recover volatile components, and a surface modifier is immediately added after crushing to inhibit powder agglomeration. The process solves the problems of degradation of thermosensitive components, dissipation of volatile components, overlarge particle size and the like in traditional crushing, so that the retention rate of the thermosensitive components is greater than or equal to 95%, the volatile loss rate is less than or equal to 3%, and the dissolution rate is increased by 2.8 times or more. The obtained powder can be directly applied to acupoint application, powder inhalation and transdermal preparations, and the requirements of a novel drug delivery system are met.

The invention discloses a method for synchronously detecting multiple heavy metal ions in a water body, relates to a method for synchronously detecting multiple heavy metal ions in a water body, and belongs to the technical field of environmental monitoring. The problems of poor selectivity and organic interference during synchronous detection of multiple heavy metal ions are solved. According to the scheme, three heterojunction modification layers are constructed on a glassy carbon electrode to form a bionic photoelectric electrode; step-by-step photoelectric enrichment: 650nm laser is adopted,-0.6 V enables a middle layer to capture Cd < 2 + > and Pb < 2 + >, 532nm laser is adopted,-1.5 V pulse enables a surface layer to enrich Cu < 2 + > and Hg < 2 + >, and square waves repel organic matters; dissolution peaks are collected in different areas in differential pulse dissolution scanning, 12 keV X-ray excitation is synchronized, and quantification is performed only when the target ion characteristic dissolution peak potential is matched with the corresponding characteristic X-ray fluorescence signal at the same time. The method is used for synchronously and accurately detecting Cd < 2 + >, Pb < 2 + >, Cu < 2 + > and Hg

The invention relates to the technical field of element detection, in particular to a method for measuring the manganese content in copper concentrate, which comprises the following steps: weighing a copper concentrate sample with the mass of m in a tetrafluoroethylene beaker, and adding a small amount of water to soak the sample; adding nitric acid and hydrochloric acid, and heating at 200-300 DEG C for 5-10 minutes; then adding perchloric acid and hydrofluoric acid, heating at 200-300 DEG C until the copper concentrate sample is completely dissolved, and cooling to room temperature; adding dilute nitric acid, and heating to dissolve the separated salt crystals to obtain a to-be-detected pre-solution; transferring the to-be-detected pre-solution to a volumetric flask, adding water to dilute the pre-solution to a scale line, and uniformly shaking to obtain a to-be-detected solution; according to the method, a nitric acid-hydrochloric acid-perchloric acid-hydrofluoric acid mixed acid digestion system is adopted, so that the manganese element in the copper concentrate is completely dissolved, and the interference of a complex matrix on manganese determination is effectively solved; by combining the high sensitivity and multi-element analysis capability of the inductively coupled plasma emission spectrometer, a linear standard curve of a manganese element characteristic spectral line and concentration is established, and the accuracy and precision of quantitative analysis are remarkably improved.

The present application relates to the technical field of reservoir diagenetic strength prediction characterization, and more particularly to a simulation method for offshore deep reservoir dissolution strength, which is characterized in that, according to the relationship between the parameters of diagenetic fluid channels and the reservoir dissolution strength, the diagenetic fluid channels are mathematically characterized, a reservoir dissolution factor calculation model under the guidance of fault parameters is constructed, the model can calculate the dissolution strength in the vertical direction of a single well, and finally, the longitudinal distribution curve of the dissolution factor calculated by the model is combined with seismic data to perform inversion simulation, spatial simulation and prediction of the reservoir dissolution strength, so that quantitative evaluation of the reservoir dissolution effect can be realized. The present application constructs a dissolution factor prediction calculation model based on the quantitative relationship between the dissolution strength and the diagenetic fluid channels, and performs calculation from the cause mechanism of dissolution, so that the rationality and accuracy of the characterization are improved.

A dissolution determination apparatus and an operating method thereof are provided. The dissolution determination apparatus may include: a dissolution determination apparatus may include: a reader configured to read identification information of a container that accommodates a target sample; a driving module including at least one body, the at least one body of the driving module configured to open the container and move the container to a capturing position; an image obtaining module configured to obtain, at the capturing position, at least one image of the target sample while the container is open; and at least one processor configured to automatically determine whether the target sample is dissolved by analyzing the at least one image of the target sample based on the identification information of the container.

The invention discloses a method for in-situ leaching mining of sandstone uranium ore, the concentration of bicarbonate radical ions in ore bed water in the sandstone uranium ore is lower than 0.5 g / L, the sandstone uranium ore comprises yttrium-containing uranium ore, and the carbonate content is 1.5%-2.5%; the ore bed water serves as a solvent, 500 mL of leaching agents with different pH values adjusted through sulfuric acid are prepared, and the concentration of hydrogen peroxide in the leaching agents is 2 g / L; and determining the maximum pH value when the uranium ore in the slice sample is corroded by using the leaching agents with different pH values, and taking the maximum pH value as a critical pH value. The leaching agent with the critical pH value is used for exploiting the sandstone uranium ore, corrosion to gangue minerals in the leaching process can be reduced, the number of formed colloids and CaSO4 precipitates is reduced, the precipitates are prevented from blocking an ore bed, in addition, the method can be used for target corrosion of the refractory uranium ore, and therefore efficient leaching is achieved.

The utility model discloses an accelerated dissolution instrument for chemical analysis, which relates to the technical field of accelerated dissolution instruments and comprises a base, an annular seat is fixedly connected to the upper side of the base, a sliding table is fixedly connected to the upper side of the base, a lifting plate is slidably connected to the front side of the sliding table, and a motor is fixedly connected to the upper side of the lifting plate. The lower side of the lifting plate is fixedly connected with a plurality of guide columns, and the lower ends of the guide columns are fixedly connected with a cover plate. Through the mutual cooperation of the driving shaft, the fixed column, the rotating shaft, the stirring rod, the limiting strip, the annular chute, the first connecting plate, the telescopic column, the second connecting plate and the spring, the stirring rod can be stirred up and down in a reciprocating manner in the stirring process, and solute and solvent in a solution can be fully mixed in the vertical direction through up-and-down reciprocating stirring, so that the stirring efficiency is improved. And on the basis of single rotary stirring, the stirring dimension in the vertical direction is increased, so that solute particles can be more quickly dispersed into the whole solution system.

The present invention discloses a method for rapidly detecting the water content in a solvent based on the color change of CsPbBr3 perovskite nanocrystals. The method comprises: adding PbBr2 and CsBr as precursors to a good solvent for dissolution, then adding a ligand and mixing uniformly to obtain a precursor solution; adding a poor solvent to the precursor solution to obtain a CsPbBr3 and PAA composite colloid; dripping solvents of varying water contents and volumes into equal amounts of the CsPbBr3 and PAA composite colloids to obtain mixtures; measuring the fluorescence spectra of the mixtures after standing for the same period of time, obtaining the CIE coordinate colors corresponding to the fluorescence spectra, and obtaining a colorimetric chart; dripping a solvent to be tested into the CsPbBr3 and PAA composite colloid, measuring its fluorescence spectrum to obtain the corresponding CIE coordinate colors or obtaining its luminescent color under ultraviolet light, and comparing the color with the colorimetric chart to determine the water content of the solvent to be tested. The method can determine the water content of a solvent by visually observing the photoluminescent color of the perovskite colloid after the solvent has been added, thereby enabling rapid and convenient perovskite detection of the water content of the solvent.

The invention provides a high-density solute and a preparation method thereof, the high-density solute comprises a solute body and an instantizer used for assisting the solute body to be uniformly dissolved in water, and the instantizer can react with water to generate the solute body. Through the combined design of the solute body and the instantizer, the high-density solute provided by the invention not only has the characteristic of high density so as to improve the solute loading capacity under the same volume, but also can remarkably accelerate the dissolution rate of the solute body by virtue of the characteristic that the instantizer is preferentially dissolved and reacts with water to generate the solute body, so that rapid and uniform dissolution is realized; no extra impurities are introduced in the whole process; the solute is suitable for the field where the solute needs to be rapidly and uniformly dissolved, and stability and reliability of solute supply in an application scene are effectively guaranteed.

The embodiment of the invention discloses a method and a device for preparing 212Pb based on 226Ra, and the method comprises the following steps: carrying out reactor irradiation treatment on a target material containing 226Ra to obtain an irradiated target material; and dissolving the irradiation target material to obtain a target material dissolving solution. The target material dissolving solution is placed in a first separation column to be subjected to first acid leaching treatment, a Th-containing adsorption column is obtained, and the first separation column is used for adsorbing Th. And carrying out second acid leaching treatment on the Th-containing adsorption column to obtain a Th-containing eluent. And carrying out standing treatment on the Th-containing eluent to obtain a standing solution containing 228Th. And the standing liquid containing 228Th is placed in a second separation column to be subjected to third acid leaching treatment, eluant containing 212Pb is obtained, and the second separation column is used for separating lead.

The invention provides a method for detecting the dissolution rate of drug nanocrystals based on an aggregation-induced fluorescence probe, and belongs to the field of drug analysis. Comprising the steps of construction of an AIE probe-nanocrystal hybrid system, establishment of a fluorescence intensity-drug solid content standard curve, determination of the dissolution rate of the nanosuspension and the like. The amount of undissolved medicine is directly reflected through a solid-state fluorescence signal, and the adsorption error of a filter membrane is thoroughly eliminated; the microplate reader can online monitor the change of the fluorescence intensity of a plurality of samples along with time at one time; meanwhile, the detection method can be compatible with standard dissolution devices such as a paddle method; complex test conditions such as pH gradient dissolution are supported; compared with the prior art, the detection efficiency of the final implementation effect is improved by 5-30 times, the manual intervention of operation is reduced by 80%, the equipment and solvent cost is reduced by 80%, and the HPLC is only used for the establishment process of the fluorescence intensity-drug solid content standard curve; and the problem of too long time consumption of HPLC detection is substantially solved.