46 results about "Trace element analysis" patented technology

The invention belongs to an alloy trace element analysis technology and relates to a method for measuring the sulfur content in a powdered high-temperature alloy. In the method, the sulfur content is measured by adopting a high-frequency infrared carbon and sulfur analyzer and a high-frequency induction combustion-infrared ray absorption method. The measurement method comprises the following steps of: measuring a sulfur content blank value; preparing a sulfur correction sample; correcting by adopting the high-frequency infrared carbon and sulfur analyzer; sampling and preparing a sample; preparing a specimen; and measuring the sulfur content in the high-temperature alloy powder sample to be measured. The invention improves the accuracy of a measuring result, solves the measuring problem of the sulfur content in the powdered high-temperature alloy and provides a reliable technical guarantee for the development, the smelting, the application and the quality control of the powdered high-temperature alloy.

The present invention provides a concentration method and apparatus for preparing a liquid specimen for a trace element analysis system. A holder positions a thin film that is prepared to have a liquid repellency so that a liquid sample containing a specimen can be uniformly evaporated to be concentrated at one location. An irradiation source of energy can be applied to enable a detector to determine the trace element.

The invention relates to the field of milk powder quality detection and more specifically relates to a method for distinguishing milk powder original production places through an elemental analysis-stable isotope mass spectrometry. The method is characterized by comprising the following steps: S1, obtaining samples of milk powder imported from a plurality of Countries; S2, respectively performingstable carbon and nitrogen isotope detection on a plurality of samples, performing stable hydrogen and oxygen isotope detection and performing analysis; S3, performing microelement analysis on the plurality of samples; S4, utilizing a principle component analysis method for performing principle component analysis on elements in the plurality of the samples and primarily distinguishing the samplesof the milk powder from different original production places; S5, utilizing original production place information of the plurality of samples and analysis data in the S3 and S4 and discriminant analysis to perform statistical modeling to obtain an original production place discrimination model coefficient matrix and corresponding original production place discrimination prediction accuracy; S6, bringing unknown samples into the model to perform original production place discrimination and finally judging original production place attributes. By means of the method, original production place traceability and discrimination can be primarily performed on the milk powder; thus, convenience is brought to checking of milk powder quality and fighting of counterfeit and shoddy products.

A group composition analysis method to resid and asphalt hydrocarbon is to add a treated silica gel into a chromatographic post to be added with treated Al2O, weigh resid or asphalt accurately and put them into the chromatographic post then put Al2O in it. Normal heptane is put into the post and flown paraffinsection is collected, the matched solution of normal heptane and dichloromethane is put into the post to collect the flown aromatic section, the solution of matched by dichlormethane and THF is put in it to collect the gel section. The receiving bottles are completely extracted and weighed accurately, the increased weight of each is net for each preparation section and the result is got by compute.

The invention discloses a method for comprehensively recognizing sedimentation hiatal surfaces in an ultra-thick seam. The sedimentation hiatal surfaces in the ultra-thick seam are comprehensively recognized according to five parameters acquired through coal petrography and coal quality analysis, microelement analysis, organic matter stable carbon isotope analysis, one-dimensional continuous wavelet transformation of log data and Milankovitch cycle analysis of the log data; growth control factors of the sedimentation hiatal surfaces are explained from the origin essentially through recognition of Milankovitch cycles in the ultra-thick seam, the root cause of growth of the sedimentation hiatal surfaces is found out, and the accuracy and the credibility of the sedimentation hiatal surfaces are greatly improved. Besides, weight scoring is performed according to sensitivity of different recognition methods, the recognized sedimentation hiatal surfaces are correspondingly assigned, the scores obtained with all the methods are added up, and the reliability of the sedimentation hiatal surfaces is described quantitatively. The recognition method is convenient and flexible and has better practicability.

The invention discloses a seabed sulfide ore prospecting method based on topographic analysis, which comprises the following steps: step 1: selecting a mineralizing prospect area; step 2: searching for topographic data of the mineralizing prospect area and drawing a topographic map of the seabed; step 3: analyzing the topographic map of the seabed, and planning and designing a sampling station; step 4: obtaining a sediment sample at the sampling station position in the step 3; step 5: performing heavy sand mineral identification and main trace element analysis on the sediment sample, and drawing a seabed heavy mineral dispersion halo map and a geochemical halo map; step 6: performing overlay analysis on the seabed heavy mineral dispersion halo map and the geochemical halo map, and defininga favorable mineralization area in combination with the topographic analysis. The method in the invention optimizes and innovates the sampling station setting of the seabed sediment, and the samplingstation setting is more reasonable and effective; combined with the heavy mineral and geochemical methods, a better detection effect is achieved for the inactive hydrothermal zone concealed sulfide and secondary enrichment mineralization; and the cost is low compared with other methods.

The invention discloses a method for determining the hydrothermal activity age of a carbonate reservoir. The method comprises the following steps: step 1. collecting and screening samples; step 2. performing reservoir petrologic feature analysis on the samples; step 3. performing cathode luminescence analysis on the samples; step 4, performing carbon-oxygen isotope and trace element analysis on the samples; step 5, performing laser in-situ carbonate mineral U- Pb dating on the samples; and step 6, performing hydrothermal activity age analysis on the samples. The method disclosed by the invention has the beneficial effects of simple preprocessing, short test period and high data accuracy.

The invention provides a laser-based solution ablation injection analysis method. The method comprises the steps as follows: weighing a to-be-tested geological sample and digesting to obtain a digestion product; subjecting the digestion product to constant volume to obtain a solution sample; injecting the solution sample into a solution sample target; covering the upper part of the solution sampletarget with a sealing film, and then placing the sealed solution sample target in an ablation pool; ablating the solution sample in the solution sample target by adopting a laser beam to obtain aerosol; and loading the aerosol into an inductively coupled plasma mass spectrometer by utilizing a carrier gas for detection, thereby obtaining measured values of major elements and trace elements in theto-be-tested geological sample. By adopting the method provided by the invention, the problems of solvent-related polyatomic ion interference and sample matrix effect in the ICP-MS (Inductively Coupled Plasma Mass Spectrometer) analysis of major elements and trace elements injected by adopting a conventional solution atomization method are overcome, and a simple, environmentally-friendly and novel injection method with a film-dissolving effect is provided for analyzing solution samples by the ICP-MS.

The invention discloses a full-automatic trace element analyzer, which relates to the technical field of trace element detection. The full-automatic trace element analyzer mainly comprises a fixed disk, a rotating disk, a driving shaft, a cleaner, a sample adding device, a test electrode, a liftable cleaning platform and the like. A slide rail and a slide way which cooperate with each other are arranged between the rotating disk and the fixed disk to prevent the rotating disk from vibrating up and down during rotation; contact sensors cooperate with balls, an audible and visual alarm gives analarm to remind an operator to replace or adjust the instrument in time when the rotating disk does not rotate in place, the cooperation between triangular fastening blocks and slots can prevent the rotary shaft from slightly rotating when the rotating disk rotates in place, and thereby the accuracy of measurement is ensured; and the number of measuring cup holes in the rotating disk can be permanently designed as six. The practicability is high.

The invention discloses a method for calibrating an ICP-MS trace element analyzer through an internal standard combined solution. The method comprises the following steps: preparing the internal standard combined solution; sampling the internal standard calibration product and the external standard calibration product at the same time; adjusting parameters of a trace element analyzer; sampling theinternal standard calibration product and the external standard calibration product at the same time; drawing a calibrated standard working curve; and detecting signals of trace elements and internalstandard elements in the sample to be detected, calculating the ratio of the trace elements to the internal standard elements, and calculating the concentration of the trace elements to be detected on the basis of the calibrated standard working curve. According to the method, the preparation work before computer detection is simple and rapid to operate, the probability of manual operation errorscaused by tedious preparation is reduced, and when the standard working curve is directly adopted for testing, an internal standard method is used for correction, so that the optimal test result canbe obtained.

An analytical vessel for analyzing trace elements, which is formed of glassy carbon produced through carbonization of a resin composition. A method of analyzing trace elements, which comprises the steps of introducing a solution which is capable of decomposing an assay sample into an analytical vessel containing the assay sample and made of glassy carbon produced through carbonization of a resin composition to thereby dissolve the assay sample, thus obtaining a sample solution; and measuring trace elements included in the assay sample and dissolved in the sample solution.

The invention belongs to the technical field of high-purity trace element analysis, and relates to an analysis method for determining a gallium element in high aluminium. According to the invention, 10 mL-20 mL of hydrochloric acid (1+1) and 3-8 mL of nitric acid are added, and heating is carried out for dissolving a sample. The method takes dilute hydrochloric acid and nitric acid for dissolvingthe sample to obtain a clarified sample solution; an optimum analysis spectral line is determined through interference experiments, and the measurement accuracy is increased; a determination scope ofthe method is wide, the measurement lower limit is 0.005%, and the measurement upper limit is 0.005%. The synchronous processing of a sample and preparation of a calibration solution are employed formeasuring the gallium element, the analysis error is minimum, and the method repeatability is good; the recovery rate and the precision are good; through standard sample analysis and method reinspection, the analysis method has the advantages of good accuracy and stable method, and completely accords with the requirement of trace element analysis. The method has the advantages of fast measurement,simple operation, and saves a lot of manpower and material resources.

The invention discloses a sample feeding device for a trace element analyzer. The sample feeding device comprises a base and a support. The support is fixedly connected to the top end face of the base. A sample inlet is formed in the base; a sample feeding moving assembly is mounted on the support; a sample feeder is fixedly connected to the sample feeding moving assembly, a groove is formed in the base, two belt wheels are rotationally connected in the groove and are in transmission connection through a belt, one belt wheel is fixedly connected with a first servo motor, the other belt wheel is fixedly connected with a fixing block, and a sample tray is clamped to the fixing block. The sample tray, the belt pulleys and the fixing block are arranged, a plurality of samples can be detected at one time, the operation is convenient, an automatic sample changing function during sample detection can be realized, and the detection efficiency is improved; the sample feeding moving assembly isarranged, the sample feeder can move in the horizontal direction and the vertical direction, and the sample feeder can conveniently suck the sample and inject the sample into the sample inlet.

The invention belongs to the field of alloy trace element analysis technologies, and relates to an atomic fluorescence method for measuring the content of arsenic, antimony and bismuth which are contained in a high-temperature alloy FGH96. The atomic fluorescence method comprises the following analysis steps of: weighing a sample material; preparing a sample solution; preparing a calibration solution; preparing a low-standard solution; preparing a high-standard solution; measuring the concentration of the arsenic, the antimony and the bismuth which are contained in the sample solution; calculating a measurement result to obtain the content of the arsenic, the antimony and the bismuth. The invention provides a hydride generation atomic fluorescence method which has the advantages of high analysis sensitivity, easiness and convenience for operation, short analysis cycle and high efficiency and is used for measuring the content of the arsenic, antimony and bismuth which are contained in the high-temperature alloy FGH96. The hydride generation atomic fluorescence method provided by the invention is wide in application prospect, can meet the requirement that the content requirements of impurity elements are more and more strict with the engineering application of the FGH96 alloy and the requirement for control of low-melting point elements, namely the arsenic, the antimony and the bismuth, especially. The atomic fluorescence method provided by the invention meets the requirements of scientific research and production on the quality control of raw materials, reduces the rejection rate of products and saves the development and production cost.

The invention belongs to an alloy trace element analysis technology and relates to a method for measuring selenium and tellurium in a high-temperature alloy FGH96. The method comprises the analysis steps of weighing a test material; preparing a test sample solution; preparing a calibration solution; preparing a low-standard solution; preparing a high-standard solution; measuring the concentration of selenium and the concentration of tellurium in the test sample solution; and calculating according to measured results to obtain the content of selenium and the content of tellurium. The hydride generation atomic fluorescence method provided by the invention is used for measuring the selenium content and the tellurium content in the high-temperature alloy and is high in analysis sensitivity, easy to operate, short in analysis period and high in efficiency. The atomic fluorescence method has wide application prospect and can meet the trend that along with the engineering application of the alloy FGH96, a requirement on the impurity element content is more and more strict, and particularly, the impurities such as selenium and tellurium are controlled strictly. The method can meet requirements of scientific research and production on the quality control of raw materials, reduce the rejection rate of products, and save the development and production costs.

The invention belongs to the field of technologies for quantitatively analyzing impurity elements of graphene oxide, and relates to an analysis method for measuring manganese, silicon and potassium ingraphene oxide. According to the analysis method, a sample is heated in an electric furnace in a stepped temperature rising mode; then the sample is burned in a muffle furnace, and finally the oxidesare dissolved by an acid. An inductive coupling plasma spectrometer is adopted for measurement. Through a dissolution condition test, a coexist element interference test, and a work curve linear test, an optimal analysis line is determined, the measurement accuracy is improved; the measurement range is wide, the detection range of manganese is 0.10% to 10.0%, the detection range of silicon is 0.05% to 1.00%, and the detection range of potassium is 0.01% to 0.20%. The analysis method has the advantages of good repeatability, high recovery rate, and high precision. By analyzing a standard sample and analysis results of different instruments, the provided analysis method has the advantages of high accuracy and stability, and totally meets the requirements of trace element analysis. The measurement method is direct and rapid, the operation is simple and convenient, and a large amount of labor and materials is saved.

The invention discloses a laser-assisted full-reflection X-fluorescence uranium ore trace element analysis device. The device comprises an excitation light source, a detection device, a sample table,a laser-assisted analysis device, an analyzer and circuit output equipment. The device disclosed by the invention has the advantages that the sample positioning and area and thickness monitoring can be quickly and effectively realized, the influence on the full-reflection optics by the thickness and area change of the sample can be overcome, and the TXRF measurement accuracy is improved. By adopting the full-reflection X-ray fluorescence analysis principle is adopted, the content of the trace heavy metal in the sample can be quickly detected, the detection is simple and fast and low in cost; the precision is high, the measurement time is short, the personal error is small, and the operator labor intensity is low; the X-fluorescence heavy metal measurement instrument is free from chemical pollution and radioactive pollution, short in measurement time, high in precision, simple in structure, safe and reliable, and convenient for use.

The invention provides a method and device for determining lithology of clastic garnet mineral mother rock. The method comprises steps of preliminarily determining the lithology of the clastic garnetmineral mother rock through employing a garnet Mg-Fe+Mn-Ca main element discrimination graph according to a main element analysis result of a to-be-detected clastic garnet mineral; and when the main element analysis result of the to-be-detected chip garnet mineral falls in the Type A, Type B or Type D region of the discrimination graph, further determining the parent rock lithology of the to-be-detected chip garnet mineral by utilizing the trace element analysis result of the to-be-detected chip garnet mineral. According to the method, garnets from a basic rock source and a variable basic rocksource can be more systematically and accurately distinguished, garnets from different types of skarn sources can be distinguished, and garnets from a granite source, a high-grade granite phase-change argillaceous rock source and a medium-low-grade hornstone phase-change argillaceous rock source can be distinguished; and therefore, the method plays an important role in the aspects of material source recovery research, even basin-mountain coupling relationship research and the like.

The invention belongs to the field of alloy trace element analysis and relates to a method of measuring ultra-low sulfur content in wrought superalloy. The method comprises the following steps of lowering and stabilizing a blank value, using a high-content sulfur standard substance calibration instrument, measuring a sulfur content total blank value, measuring the sulfur content total blank valuethrough three calibration processes, measuring low-content sulfur standard substances, determining that a measurement value is in a standard substance allowable difference range, and finally measuringthe ultra-low sulfur content in the wrought superalloy to be measured. The method provided by the invention improves the accuracy of a measurement result and provides reliable technical guarantee tosmelting and quality control of the wrought superalloy.

The invention discloses a trace element detecting method. The method comprises the following steps that a to-be-detected sample reagent is detected by using a three-electrode sensor, and voltage signals varying along with time are obtained, wherein the three-electrode sensor particularly comprises a working electrode, a counter electrode and a reference electrode; the voltage signals are subjected to signal conditioning, and a conditioning signal is obtained; the conditioning signal is analyzed by using an embedded development platform NI MyRIO and a LabVIEW development platform, and a trace element analysis result is obtained. The method has fewer operation steps and is simpler, quicker in data collection and more precise in type and content detection, and the detection efficiency is obviously improved. Meanwhile, the invention further discloses a trace element detecting device. The trace element detecting device has the above advantages.

The invention provides a method for determining the fireflooding combustion temperature of a heavy oil reservoir by using iron-containing minerals. The method comprises the following steps of carryingout a calcination test on a core in a target research area under different temperature conditions, and carrying out whole-rock quantitative analysis on the core after the core is cooled to obtain thesiderite content in the core under different calcination temperature conditions and the relationship between the siderite content and the temperature; carrying out heavy mineral analysis on the cooled rock core so as to determine the content of iron-containing minerals in the heavy minerals under different calcination temperature conditions and the relationship between the iron-containing minerals and the temperature; carrying out trace element analysis on the cooled rock core so as to determine the contents of total iron, Fe<2+> and Fe<3+> in the iron-containing minerals under different calcination temperature conditions and the relationship between the contents and the temperature; analyzing the change rule of the color of the cooled rock core, and establishing a rock core color code plate; and determining the fireflooding combustion temperature of the heavy oil reservoir according to the relationship between the siderite content, the iron-containing mineral content, the total ironcontent, the Fe<2+> content and the Fe<3+> content in the rock core and the temperature and one or more of the rock core color code plates.

The invention belongs to the alloy trace element analysis technology, and relates to a method for measuring hydrogen content in a powder high-temperature alloy. The method is characterized by measuring the hydrogen content in the powder high-temperature alloy with a hydrogen tester by an inert gas pulse heating-thermal conductance method and specifically comprising the following steps: weighing asample material; preparing a sample; performing a blank test; preparing a hydrogen calibration sample; calibrating the sample with the hydrogen tester; and measuring the hydrogen content in the sample. The method of the invention can help improve the accuracy of measuring results and solve the problem of measuring the hydrogen content in the powder high-temperature alloy.

The invention discloses an analyzer for trace elements in blood. The analyzer comprises a host and a computer control system, wherein the computer control system is connected with the host through a data cable; a testing room and a laser illumination system are arranged in the host; the laser illumination system is arranged in the testing room and comprises a laser generator and a laser incident channel; test tubes for holding blood samples are arranged at the bottom of the laser incident channel; an optical fiber collecting head is arranged on the side wall, which is just opposite to the test tubes, of the testing room; the optical fiber collecting head is connected with a spectrograph located in the host through wires; the spectrograph is connected with the computer control system through the data cable; the test tubes are arranged in the testing room through test tube holders; the bottoms of the test tube holders are arranged in the host through a sliding seat; the testing room is arranged in a sealing manner; the sliding seat is sealed with the testing room by a sealing strip. According to the analyzer disclosed by the invention, the accuracy of a testing result can be ensured, rapid detection can be realized, the testing time is shortened, and the efficiency is improved.

A seabed sulfide ore prospecting method based on topographic analysis, comprising the following steps: step 1: selecting a mineralization prospect zone; step 2: searching for topographic data of the mineralization prospect zone and drawing a seabed topographic map; step 3: analyzing the seabed topographic map, and planning and designing a sampling station; step 4: obtaining a sediment sample at the sampling station position in step 3; step 5: performing heavy sand mineral identification and main trace element analysis on the sediment sample, and drawing a seabed heavy mineral dispersion halo map and a geochemical halo map; step 6: performing overlay analysis on the seabed heavy mineral dispersion halo map and the geochemical halo map, and defining a favorable mineralization zone in combination with the topographic analysis. The method optimizes and innovates the sampling station setting of the seabed sediment, and the sampling station setting is more reasonable and effective; in combination with the heavy mineral and geochemical methods, a better detection effect is realized for inactive hydrothermal zone concealed sulfide and secondary enrichment mineralization; costs are lower compared with other methods.

An experimental method for the influence of trace elements on the growth of algae under different nitrogen and phosphorus conditions. First, a fresh medium is prepared. There is no nitrogen source, phosphorus source and trace elements to be tested in the medium, and then different amounts of N source and P source are put into it. As well as the trace elements to be tested, obtain different N / P ratios and different trace element contents of the medium; then select the experimental algae species and inoculate them into the preset fresh medium containing different nitrogen and phosphorus ratios and different trace element contents middle; then cultivate the algae, measure the algae photometrically, calculate the content of chlorophyll a, then count the algal cell density of the cultivated algae, and finally carry out different nitrogen and phosphorus conditions on the sample according to the measurement results of chlorophyll a and algal cell density. Under the condition that trace elements affect the growth of algae, the present invention can simultaneously measure chlorophyll a and algae cell density in a short time, and quickly reflect the experimental results through the data, which has the advantages of high sensitivity, high precision and high accuracy.

The invention discloses a method for analyzing trace elements in food and managing diet health. The method comprises the following steps: 1, classifying oriented user groups according to classification standards to obtain user group data after the classification standards are determined; 2, acquiring the daily diet record data of a specified user group; 3, performing text analysis processing on the obtained daily diet record data through data processing to obtain trace element content characteristics; 4, determining a proper cycle time T, and generating a new trace element analysis table by adata processing center; 5, analyzing whether the trace elements ingested by a user are at a normal level through the trace element analysis table; and 6, formulating reasonable diet, work duration andrest time recommendation for the user group according to the analysis result. According to the invention, the nutrient contents in various foods can be known, and the relationship between nutrients in foods and health is explored, so that the method is helpful for preventing or treating some diseases.

The invention discloses a control circuit of a trace element analyzer and the trace element analyzer. The control circuit comprises a switch assembly, a turntable assembly, an element detection assembly and an element analysis assembly, the switch assembly is conducted when receiving the key signal and outputs a first power supply signal; a to-be-detected biological sample is placed on the turntable assembly; the element detection assembly receives a first power supply signal and acquires an element detection signal corresponding to the biological sample to be detected; the element analysis assembly acquires the content of the trace elements according to the element detection signals and displays the content; the control circuit is provided with a relatively simplified circuit module structure; the actual content of the trace elements in the biological sample to be detected can be fully automatically and accurately detected; the detection steps of the element content are simplified, technicians can obtain the content of the trace elements more visually and quickly, the content of the trace elements does not need to be detected manually, the trace element detection error of the biological sample to be detected is reduced, the practical value of the trace element detector is increased, and the application range of the trace element detector is widened.

The invention belongs to the technical field of high-purity trace element analysis, and relates to an analysis method for determining a silicon element in high aluminium. According to the invention, 5mL-15 mL of sodium hydroxide (100g / L) is added, an electric hot plate is controlled at about 120-150 V, heating is carried out for about 40-70 min, then the electric hot plate is taken out, cooling is carried out to room temperature, 2-5 mL of nitric acid is added, and the material is placed on the electric hot plate for reheating to dissolve salts. The method takes sodium hydroxide, hydrochloricacid, nitric acid, and hydrofluoric acid for dissolving a sample to obtain a clarified sample solution; an optimum analysis spectral line is determined through interference experiments, and the measurement accuracy is increased; a determination scope of the method is wide, the measurement lower limit is 0.001%, and the measurement upper limit is 0.02%. The synchronous processing of a sample and preparation of a calibration solution are employed for measuring the silicon element, the analysis error is minimum, and the method repeatability is good; the recovery rate and the precision are good;through standard sample analysis and method reinspection, the analysis method has the advantages of good accuracy and stable method, and completely accords with the requirement of trace element analysis.