139 results about "Microwave digestion" patented technology

The invention discloses a microwave digestion tank with a rapid pressure reduction structure, and relates to the technical field of microwave digestion tanks. The microwave digestion tank with the rapid pressure reduction structure comprises a tank body and a tank cover, a mounting cavity is formed in the tank cover, a through hole is formed in the bottom of the mounting cavity, and an exhaust pipe is fixedly connected to the top of the through hole. According to the microwave digestion tank with the rapid pressure reduction structure, during rapid pressure reduction, when high-pressure gas in the sealing cavity is discharged through the through hole, gas-liquid separation, gas discharge and liquid return into the sealing cavity can be performed through the gas-liquid separation device, so that the liquid in the tank body is prevented from being taken out by gas flow, and the accuracy of a detection result is ensured.

The invention belongs to the technical field of chemical detection, and particularly relates to a method for detecting the content of boron in soil and sediment, which comprises the following detection methods: S1, weighing a sample and putting the sample into a digestion tank; s2, adding a digestion solution into the digestion tank; s3, after uniform stirring, putting the digestion tank into a microwave digestion instrument for microwave digestion; s4, after digestion is completed, closing the microwave digestion instrument, and after the digestion tank is cooled to the room temperature, filtering to remove precipitates; s5, transferring the digestion solution into a volumetric flask, and fixing the volume for subsequent analysis; and S6, analyzing the digestion solution by using ICP-OES / MS (Inductively Coupled Plasma-Optical Emission According to the method for detecting the boron content in the soil and the sediment, ammonium fluoride is used for replacing hydrofluoric acid in boron detection of the soil and the sediment, use of toxic reagents is reduced, mannitol is added, a stable complex is formed by mannitol and boron, and the recovery rate of boron is increased.

The invention relates to a digestion method for lithium sulfide impurity element analysis and a content determination method thereof, the digestion method comprises the following steps: (A1) pre-digestion: weighing a lithium sulfide sample, and adding ultrapure water to obtain a sample aqueous solution; dropwise adding oxidizing acid into the sample aqueous solution, and heating to enable the lithium sulfide sample in the sample aqueous solution to fully react, so as to obtain a pre-digested sample; (A2) microwave digestion: carrying out microwave digestion on the pre-digested sample under a closed condition to obtain a microwave digested sample, and fixing the volume to obtain a to-be-detected sample solution. Compared with a conventional multi-time acid-adding digestion method, the digestion method has the advantages that oxidizing acid does not need to be added repeatedly, so that the operation steps are simple, the digestion time is short, and compared with the multi-time acid-adding digestion method, the method can meet quantitative analysis of most impurity elements in lithium sulfide.

The invention provides a method for detecting the content of elements in carbonized resin. The method comprises the steps of resin pretreatment, instrument tuning, standard curve drawing, sample detection and the like. The method comprises the following steps: firstly, transferring a certain amount of dry carbonized resin into a cleaned PFA digestion tank, adding high-purity mixed acid, setting a segmented heating program to start microwave digestion, cooling to room temperature after digestion is completed, adding a proper amount of ultrapure water to dilute a digestion solution, and adding an internal standard solution and a chemical additive to obtain a to-be-detected sample solution; preparing a multi-element mixed standard solution according to the sample element types, adding the standard solution into the sample solution, and measuring the signal intensity ratio R of the to-be-measured element to the internal standard in each solution; and drawing a standard curve by taking the labeling concentration as a horizontal coordinate and R as a vertical coordinate, correcting the standard curve, and detecting the sample to be detected. The method is used for detecting the content of elements in carbonized resin, the carbonized resin is digested through microwaves, and the obtained solution is clear and can be directly subjected to ICP-OES (Inductively Coupled Plasma-Optical Emission Spectrometer) detection.

This invention discloses a method for dissolving NiCrPSi nickel alloy samples for ICP-OES detection, comprising the following steps: mixing the NiCrPSi nickel alloy sample to be tested with hydrochloric acid aqueous solution, concentrated nitric acid, and hydrofluoric acid aqueous solution, digesting at 120-140℃ for 1.5-2.5h, and then evaporating the solution to dryness at 220-260℃; then adding nitric acid aqueous solution and heating until the solid is completely dissolved, and then diluting with water to obtain the NiCrPSi nickel alloy test solution. The dissolution method of this invention can completely dissolve NiCrPSi nickel alloy powder without elemental loss, providing an accurate sample solution for ICP-OES detection; and it eliminates the need for specialized equipment such as microwave digesters or electrothermal digesters, as well as special reagents such as perchloric acid and tartaric acid, using only conventional acid reagents and general experimental equipment, thus reducing costs, simplifying operation, and enhancing versatility.

The invention belongs to the field of detection, and particularly relates to a method for detecting the migration amount of nine metals in a cosmetic packaging material and application of the method. The method comprises the following steps: sample acquisition: taking cosmetic simulation liquid; sample migration; sample pretreatment: taking the cosmetic simulation liquid in the packing material, and respectively carrying out the following treatments: filtering the acid-containing cosmetic simulation liquid through a filter membrane; heating the alcohol-containing cosmetic simulation liquid to be nearly dry, fixing the volume by using nitric acid, and filtering; adding nitric acid into the oil-containing cosmetic simulation liquid, heating for pre-digestion, cooling to room temperature after the pre-digestion is completed, carrying out microwave digestion, heating until no yellow smoke is generated after the digestion is completed, fixing the volume by using deionized water, and filtering; an ICP-MS instrument is adopted for testing, and data acquisition and processing are carried out; and preparing a standard solution, and calculating to obtain the content of each element. Nine elements can be detected at the same time, and the detection efficiency can be effectively improved; the pretreatment method is designed for different cosmetic simulation liquids, and the detection accuracy can be improved.

The invention relates to the technical field of analysis and detection, in particular to a method for analyzing an aluminum element in peanut iodized oil. The analysis method specifically comprises the following steps: sample pretreatment: fully reacting a to-be-detected sample with nitric acid, treating the to-be-detected sample in a water bath environment at 80-120 DEG C for 1-2 hours, and then carrying out microwave digestion; after the digestion is completed, treating in a water bath environment at 60-80 DEG C for 1-2 hours, and fixing the volume. Performing inductively coupled plasma mass spectrometry determination: respectively adding internal standard ISTD elements with the same concentration into the standard solution, the test solution and the blank solution, and performing determination; and preparing a standard curve by using the standard solution, and calculating the concentration of the aluminum element in the test solution by using the standard curve. Compared with the prior art, the analysis method provided by the invention not only has lower requirements on the sample dosage, but also has higher accuracy and lower detection limit.

The invention relates to the technical field of positive electrode material foreign matter detection, and particularly discloses a technology for detecting the number and content of foreign matters in an explosion-proof positive electrode material of a lithium battery. The method comprises the following steps: sampling a plurality of ton bags, uniformly dispersing a to-be-tested sample by taking absolute ethyl alcohol as a dispersing agent, and putting the to-be-tested sample into an ultrasonic machine by adopting a screen for ultrasonic screening until no obvious material residue exists on the screen; washing residues on the sieve with ultrapure water, carrying out suction filtration, and observing and acquiring quantity information of foreign matter particles through a cleanliness instrument; and finally, performing microwave digestion on impurities on the filter membrane, and testing the content of impurity elements by virtue of an inductively coupled plasma emission spectrometer, so that the interference of main elements in the sample is effectively eliminated. The method can realize efficient separation and accurate analysis of foreign matters in the positive electrode material, is high in detection sensitivity and simple and convenient to operate, can be widely applied to the quality control link of the positive electrode material, and provides reliable detection support for improving the safety performance of the positive electrode material.

The invention relates to the technical field of metal detection, in particular to a method for detecting gallium, germanium and indium in high-temperature vitreous furnace slag, which comprises the following steps: drying and grinding the high-temperature vitreous furnace slag, mixing with an alkali solvent, melting at high temperature, cooling, adding water, and filtering to obtain a precipitate containing gallium, germanium and indium; soaking and dissolving the precipitate with dilute acid, and then carrying out microwave digestion; and after digestion is completed, adding a boric acid solution to neutralize residual hydrofluoric acid, and detecting by adopting inductively coupled plasma mass spectrometry after volume metering. According to the present invention, the alkali melting is combined with the microwave digestion, such that the complete dissolution of the sample is achieved, the matrix interference is reduced, and the detection sensitivity and the detection accuracy are improved. The method has the advantages of short pretreatment time, safe operation, wide application range and the like, and can effectively solve the problems of complex sample pretreatment, low detection sensitivity and serious matrix interference in the prior art.

This invention discloses a method for determining the content and simultaneously identifying the source of polyglutamic acid (PCA) in fertilizers based on microwave digestion-high-resolution liquid chromatography-mass spectrometry (LC-MS), belonging to the field of analytical detection technology. The method includes: microwave-assisted acid hydrolysis of fertilizer samples to obtain a hydrolysate; injecting the hydrolysate into a liquid chromatography-high-resolution mass spectrometry (LC-MS) instrument, performing a single injection analysis in data-independent acquisition (DIA) mode, and simultaneously acquiring a mass spectrometry dataset containing a full-scan fingerprint of the parent ion and fragment information of the daughter ion by alternating between low and high collision energies; extracting the precise mass number of PCA from the dataset for accurate quantification, and calculating the PCA content using the difference method; simultaneously retrieving the total ion chromatogram and inferring the source of PCA based on the response of other amino acids. This invention is the first to introduce microwave digestion pretreatment and high-resolution mass spectrometry DIA acquisition mode into the field of PCA detection in fertilizers, requiring only a single injection to simultaneously complete accurate quantification and source identification, effectively avoiding false positives caused by background of plant and animal protein hydrolysates, and significantly improving the efficiency and confidence of PCA detection in complex matrix fertilizers.

1. The name of the design product: microwave digestion instrument (high temperature and high pressure). 2. The use of the design product: an experimental equipment for sample digestion. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The utility model discloses a microwave digestion acid-driving observation device which comprises a longitudinal observation tube with a sealing lens at the lower end, and an illuminating lamp is arranged at the lower end part of the longitudinal observation tube or below the longitudinal observation tube. The upper end of the longitudinal observation pipe is connected with a transverse observation pipe of which the trend is vertical to the trend of the longitudinal observation pipe; a first reflective mirror used for reflecting light in the longitudinal observation pipe to the outer end of the transverse observation pipe is fixedly installed at the joint of the longitudinal observation pipe and the transverse observation pipe. When the acid-driving operation is observed, the longitudinal observation tube is inserted into the digestion tank or the lower end of the longitudinal observation tube is positioned at the opening of the digestion tank, the illuminating lamp is turned on, and an operator can observe the state in the digestion tank in the side direction of the digestion tank by means of the reflection direction change of the light rays by the reflective mirror. Therefore, the operation is simplified, the risk of acid gas overflow is reduced, and the operation safety is improved.

The invention discloses a method for detecting mercury content in cordyceps sinensis, which comprises the following steps: taking cordyceps sinensis powder, pre-treating by adopting a microwave digestion instrument, and then detecting by adopting an inductively coupled plasma mass spectrometer. The test conditions of the inductively coupled plasma mass spectrometer are as follows: the mass numbers of mercury are selected to be 201 Hg and 202 Hg, the mass numbers of chromium, iron, nickel and tungsten are selected to be 52 Cr, 56 Fe, 60 Ni and 186 W, internal standards are selected to be 45 Sc, 72 Ge, 115 In and 209 Bi, an interpolation mode is adopted, and instrument determination is selected to be a KED collision mode. The method can effectively avoid false positive of the mercury test in the cordyceps sinensis, can accurately and reliably evaluate the quality of the cordyceps sinensis to prevent misjudgment, can cope with the specific doping problem of the cordyceps sinensis, and can also be applied to optimization of crushing equipment and crushing time in the crushing process.

The invention relates to the technical field of chemical analysis and detection, in particular to a method for detecting iodide ions in nylon slices. The method for detecting the iodide ions in the nylon slices comprises the following steps: placing the nylon slices in a microwave digestion tank, adding a potassium sulfate aqueous solution with the mass concentration of 0.9-1%, placing the nylon slices in a microwave digestion instrument for digestion, cooling after digestion is finished, and recording the nylon slices as a sample A; and directly introducing the prepared test solution A into an inductively coupled plasma emission spectrometer for determination, and calculating through an iodide ion standard curve to obtain the actual iodide ion content in the sample. According to the method for detecting the iodide ions in the nylon slices, only one-time microwave digestion is needed, multiple times of transfer or complex reaction are not needed, the extraction efficiency is high, and operation is easy; meanwhile, potassium nitrate is replaced by potassium sulfate, so that the accuracy and repeatability of a measurement result are further improved.

The utility model relates to experimental apparatus technical field, concretely relates to a microwave digestion appearance of quick sample taking and placing, including host computer and hinged setting in the sealed cover of host computer top surface, the host computer includes heat -proof shell and the microwave generating device of fixed mounting in heat -proof shell inner wall, the heat -proof shell top surface has the opening, the heat -proof shell is installed with lifting digestion jar device.

The invention provides a method and a device for microwave digestion of a geological sample under normal pressure, the method for microwave digestion of the geological sample under normal pressure comprises the following steps: S1, taking a first preset amount of geological sample, grinding until the granularity is less than 200 meshes, putting into a digestion bottle, and adding hydrofluoric acid with a first preset volume and nitric acid with a second preset volume; s2, standing for a first preset time for pre-digestion; s3, performing microwave digestion on the pre-digested geological sample for a second preset time until the geological sample is completely dissolved in a solution of hydrofluoric acid and nitric acid; s4, cooling the geological sample solution subjected to microwave digestion; s5, placing the cooled solution of the geological sample on a heating plate for heating, and performing acid removal on the solution of the geological sample at a first preset temperature until thick liquid drops appear at the bottom of the digestion bottle; s6, cooling to normal temperature, adding aqua regia, and fixing the volume to 100 ml; and S7, placing the sample in an inductively coupled plasma mass spectrometer to test trace elements in the geological sample.

The invention relates to the technical field of edible mushroom processing, in particular to low-molecular-weight hericium erinaceus beta-glucan with antioxidant activity as well as a preparation method and application of the low-molecular-weight hericium erinaceus beta-glucan. According to the method, the macromolecular hericium erinaceus beta-glucan is used as a raw material, the low-molecular-weight beta-glucan is prepared through microwave digestion and compound enzyme step-by-step degradation, the weight-average molecular weight of the prepared low-molecular-weight beta-glucan is 7.611 kDa, and compared with a high-molecular-weight beta-glucan sample, the low-molecular-weight beta-glucan is better in water solubility and lower in solution viscosity; the compound has the capability of efficiently scavenging free radicals, has good antioxidant activity, and has a wide application prospect.

The application discloses a microwave digestion tank with a rapid pressure reduction structure and relates to the technical field of microwave digestion tanks. The microwave digestion tank with the rapid pressure reduction structure comprises a tank body and a tank cover, an installation cavity is formed in the tank cover, a through hole is formed in the bottom of the installation cavity, and an exhaust pipe is fixedly connected to the top of the through hole. When the microwave digestion tank with the rapid pressure reduction structure is rapidly depressurized, high-pressure gas in the sealed cavity can be separated from liquid through a gas-liquid separation device when the high-pressure gas is discharged through the through hole, the gas is discharged, the liquid returns to the sealed cavity, the liquid in the tank body is prevented from being carried out by the airflow, and the accuracy of detection results is ensured.

The application relates to a microwave digestion instrument for pesticide sample pretreatment and relates to the technical field of pesticide residue detection. The microwave digestion instrument comprises a shell, the bottom of the shell is fixedly connected with a device seat, the top of the shell is provided with a controller, the outside of the shell is provided with a protection mechanism, the inside of the shell is provided with a heating mechanism, the outside of the device seat is provided with a dissipation mechanism, the protection mechanism comprises a rotating seat, the outside of the rotating seat is fixedly connected to the right side of the outside of the shell, the outside of the rotating seat is rotationally connected with an inner door, the outside of the inner door is fixedly connected with a pressing part, the left side of the outside of the shell is fixedly connected with an opening and closing seat, and the outside of the opening and closing seat is rotationally connected with an outer door. The application has the advantages that the inner door is driven to rotate through the rotating seat, the outer door is driven to rotate through the opening and closing seat, one side of the pressing part is supported on the outside of the shell, and the other side of the pressing part is supported on the outer door, so that the inner door and the outer door are tightly combined with the shell, and the sealing effect is improved.

The invention provides a method for analyzing trace elements in dinodon rufozonatum and an antithrombotic activity application of the dinodon rufozonatum. The method comprises the following steps: pretreatment of a dried snake or decocted liquid sample, microwave digestion, acid removal and constant volume, and ICP-MS detection of 25 trace elements. The antithrombotic activity application of the method for analyzing the trace elements in the dinodon rufozonatum is characterized in that the trace elements such as selenium, chromium and vanadium related to the antithrombotic activity are detected, the content range of the trace elements is strictly controlled, element-activity correlation verification is carried out in combination with an antithrombotic activity verification experiment, and the dinodon rufozonatum antithrombotic preparation is provided. The composition comprises dinodon rufozonatum alcohol extract and pharmaceutical auxiliary materials in a mass ratio of (4-9): 1, and the content of antithrombotic elements in the dinodon rufozonatum alcohol extract meets specific standards. The development and application of the preparation provide a new choice for the field of antithrombotic drugs, fully explore the medicinal value of dinodon rufozonatum, and have broad market prospects and important scientific significance.

The invention discloses a method for determining the content of a nickel element in ferronickel, which mainly comprises the following steps: dissolving a ferronickel sample with hydrochloric acid, nitric acid and hydrofluoric acid under the condition of microwave digestion, firstly determining the content of the cobalt element in a test solution by adopting inductively coupled plasma emission spectrometry, secondly taking the test solution and adding a masking agent to mask interference elements, a copper ion selective electrode is used as an indicator electrode, an Ag / AgCl electrode is used as a reference electrode, a Cu-EDTA solution is used as an indicator, EDTA is used as a titrant, the content of nickel and cobalt elements in a sample is calculated according to the consumption of an EDTA standard titration solution, and finally the content of the nickel element can be obtained by deducting the content of the cobalt element from the content of the nickel and cobalt elements. The method solves the problem of determination of the nickel element in ferronickel, improves the precision and accuracy of analysis and measurement, and is rapid in measurement and simple and convenient to operate.

The invention discloses a rapid sample dissolving method of a vanadium-titanium-chromium-manganese-iron quinary alloy and an all-element detection method of the vanadium-titanium-chromium-manganese-iron quinary alloy, and belongs to the field of alloy chemical component analysis and pretreatment. The rapid sample dissolving method comprises the following steps: weighing a vanadium-titanium-chromium-manganese-iron quinary alloy sample, putting the sample into a microwave digestion tank, and adding ultrapure water to wet the sample; the method comprises the following steps: respectively transferring hydrochloric acid, nitric acid and hydrofluoric acid into a microwave digestion tank, adding hydrogen peroxide when the reaction is no longer violent, then sealing the microwave digestion tank, putting the microwave digestion tank into a microwave digestion instrument, performing digestion according to set conditions, taking out the microwave digestion tank after digestion is completed, and cooling the microwave digestion tank to room temperature. Then, ICP-AES and ICP-MS are used for determining medium-content and low-content elements in the alloy, vanadium is determined through chemical wet analysis, and all-element detection is achieved. The method is simple to operate and rapid in digestion; the problems that when an existing alloy element detection method is applied to the vanadium-titanium-chromium-manganese-iron quinary alloy, dissolution is incomplete, the dissolution efficiency is low, and sulfuric acid or sodium salt interference substances are likely to be introduced can be effectively solved.

The invention discloses an efficient and safe microwave digestion-atomic fluorescence detection method for total selenium in soil, and belongs to the technical field of analytical chemistry and environmental detection.According to the method, the content of total selenium in selenium-rich soil is rapidly, accurately and safely measured by optimizing the sample weighing amount, the microwave digestion procedure and the detection conditions, and the detection accuracy is improved. The method comprises the following specific steps: weighing 0.1 g of an air-dried and sieved selenium-rich soil sample, adding 5mL of concentrated nitric acid, then carrying out a microwave digestion process of heating to 175 DEG C for 12 minutes and maintaining for 48 minutes, after digestion, adding 5mL of 6mol / L hydrochloric acid, carrying out acid removal reduction at 140 DEG C, fixing the volume to 15mL by using 5% diluted hydrochloric acid, and finally determining by using an atomic fluorescence spectrophotometer by using 5% hydrochloric acid as a carrier current and 1% potassium borohydride and 0.5% potassium hydroxide as reducing agents. According to the method, the use of dangerous reagents such as hydrofluoric acid and perchloric acid is avoided, the detection period is remarkably shortened, the linear range is 0-10 mu g / L, and the correlation coefficient is Rgt; the average recovery rate is up to 101.13%-101.51%, and the precision is RSDlt (Research Standard Defect); the requirements of rapid detection of the total selenium content of the selenium-rich soil, agricultural production and environmental evaluation are met.

The utility model discloses a microwave digestion instrument convenient to adjust, which comprises a body, and a placing plate is mounted in the body; a placing disc is fixedly mounted on the top surface of the placing plate, a plurality of clamping grooves are formed in the bottom surface of the placing disc, and a groove is formed in the middle of the top surface of the body; a rotating assembly is arranged in the groove; the rotating assembly comprises a bottom plate fixedly connected with the groove, and stabilizing plates are symmetrically installed on the surface of the top of the bottom plate. Wherein the surface of one side, close to the top, of the stabilizing plate is fixedly connected with an extension plate, the surface of the top of the extension plate is fixedly provided with a driving motor, and the output end of the driving motor is connected with a first belt pulley in a penetrating manner. Therefore, different reagent samples are digested, and the flexibility and practicability of the device are improved.

The utility model belongs to the technical field of analytical instruments, and particularly relates to a digestion tank tray for a microwave digestion instrument. The digestion tank tray comprises a lower fixing ring, and a plurality of elastic ejector pins are uniformly arranged on the inner ring of the lower fixing ring along the circumferential direction; an upper tray is arranged on the upper portion of the lower fixing ring and fixedly connected with the lower fixing ring. A digestion tank insertion hole is formed in the top of the upper tray; the lower fixing ring sleeves the outer part of a rotating disc of the microwave digestion instrument; a plurality of positioning grooves are uniformly formed in the outer ring of a rotating disc of the microwave digestion instrument along the circumferential direction; an ejector pin insertion hole is formed in the positioning groove; and the positioning grooves are in one-to-one correspondence with the elastic thimbles. According to the digestion tank tray, the problem that digestion tanks are taken out and transferred one by one is solved, the working efficiency is greatly improved, and the falling probability of the digestion tanks is greatly reduced.

The invention provides a method for detecting the amount of regenerated lithium in a ternary lithium battery positive electrode material, and relates to the technical field of lithium battery recovery, and the method comprises the following steps: carrying out microwave digestion on a sample, and directionally removing iron, aluminum and copper interfering ions by adopting EDTA (Ethylene Diamine Tetraacetic Acid) masking coupling gradient pH precipitation; the method comprises the following steps: constructing a standard addition-internal standard dual-correction model, and drawing a correction curve to calculate the initial concentration of lithium by adding a gradient lithium standard solution and a cesium internal standard solution and combining an atomic absorption spectrum or ICP-OES (Inductively Coupled Plasma Optical Emission Spectrometer) detection signal intensity ratio; an interference coefficient library is pre-established based on the nickel-cobalt-manganese impurity concentration to intelligently compensate residual errors, and the anti-interference performance of lithium detection under a complex matrix is remarkably improved through the synergistic effect of directional impurity removal and a double-correction model; the pretreatment process is simplified, instrument parameters are optimized, the equipment dependence and the operation cost are reduced while the detection precision is ensured, and an economical and efficient lithium content real-time detection scheme is provided for a regenerated positive electrode material production line.

The utility model discloses a sampling device for pretreatment of cosmetics by a microwave digestion method, which relates to the field of trace sample transfer and comprises a sampling mechanism arranged at the top of a digestion tube; the sampling mechanism comprises a cover plate, a plurality of positioning assemblies distributed in an annular array are arranged on the cover plate, and the positioning assemblies are attached to the inner wall of the upper end of the digestion tube; a sampling assembly is arranged in the middle of the cover plate. According to the utility model, the cover plate is arranged on the sampling mechanism, the plurality of positioning components are arranged on the cover plate, the L-shaped plates on the positioning components can be automatically ejected out after extending into the digestion tube under the action of the springs, and the plurality of L-shaped plates are matched to play a positioning role, so that the sampling tube on the cover plate is kept at the central position of the digestion tube; meanwhile, the plurality of L-shaped plates can be matched with the digestion tubes with different tube diameters under the action of the springs, so that the working range of the device is widened.

The application belongs to the technical field of RMA material analysis and detection, and discloses a digestion method of RMA material and a determination method of zirconia content in the RMA material. The digestion method is as follows: the RMA material is calcined to remove organic matter, and then is added into a mixed digestion solution composed of ammonium nitrate, sulfuric acid and hydrochloric acid to perform microwave digestion, so as to obtain a digestion solution. The determination method of the zirconia content is as follows: the digestion solution is diluted with nitric acid and an internal standard substance is added, and the volume is adjusted to obtain a sample to be measured; a standard series solution with different zirconium (Zr) concentrations is prepared, and then an inductively coupled plasma emission spectrometer is used to perform scanning and draw a standard working curve; meanwhile, the sample to be measured is tested, and the zirconia content in the sample to be measured is calculated according to the standard curve. The method can completely digest the RMA material without adding hydrofluoric acid, and has a good guiding significance for studying the influence of the zirconia (ZrO2) content in the RMA material on the performance improvement of the material.

The utility model relates to the technical field of microwave digestion equipment, concretely is a kind of molybdenum ore microwave digestion appearance, the upper end of lower connecting disc is rotatably connected with carousel main body, the upper wall of carousel main body is equipped with multiple groups of movable passageway, the inner wall of movable passageway of each group is slidably connected with connecting sliding block main body, and one end opening of movable passageway is fixedly connected with fixed block, the upper wall of fixed block is fixedly connected with installation cylinder, installation cylinder is used to install digestion tank, one end of fixed block is rotatably connected with threaded rod, the outer wall of threaded rod is screw-connected with sliding block main body, after digestion operation ends, the digestion tank needed to be taken out is rotated to the export by carousel main body, servo motor is opened, threaded rod is rotated by servo motor, sliding block main body is moved in the inner wall of movable passageway, the digestion tank to be taken out is moved to the export by installation cylinder, it is extremely convenient to take out, avoid mutual collision.

The application discloses rhombic nanosheet-shaped copper-doped nickel-cobalt transition metal selenide and a preparation method and application thereof. The preparation method of the material is as follows: after a coordination agent, a surfactant, a nickel salt, a cobalt salt and a copper salt are mixed with a solvent, the mixture is placed in a microwave COD digester to perform a microwave-assisted solvothermal reaction, a copper-doped nickel-cobalt MOFs precursor is obtained; the copper-doped nickel-cobalt MOFs precursor and a selenite are respectively placed in the downstream and the upstream of a tube furnace, and a selenization reaction is performed under a protective atmosphere, and the rhombic nanosheet-shaped copper-doped nickel-cobalt transition metal selenide is obtained. The material has an ultrathin rhombic nanosheet-shaped structure, the surface of the material is rough, the particle size distribution of the material is uniform, and the material has excellent electrochemical performance; when the material is used as an electrode material of a supercapacitor, the capacitance performance can be greatly improved. The preparation process is simple, the conditions are mild, the time consumption is short, and the cost is low, and the preparation process meets the industrial production standards.