365 results about "Trace element" patented technology

The invention relates to the technical field of oil and gas geological exploration, in particular to an over-mature hydrocarbon source rock parent material type distinguishing method and system.The method comprises the following steps that regional deposition characteristics are studied, an over-mature hydrocarbon source rock deposition environment is recognized, principal elements and microelements are extracted in combination with a geological background, and component relevance is judged; and sorting representative sedimentary environment elements, and establishing a sedimentary environment associated element set. According to the method, accurate recognition of the sedimentary environment is achieved by extracting major elements and trace elements, representative elements are screened, proportional analysis is combined with the macerals, distribution characteristics of saprolite groups, exinite groups and the like are determined, the ratio relation between the macerals and inorganic elements is recognized, a ratio operation set is constructed, and the relation between the macerals and the elements is analyzed in a multi-dimensional mode. The relationship between parent material types and maceral characteristics is disclosed, a maceral type index model is constructed, hydrocarbon source rock parent material type division precision and sedimentary environment analysis systematicness are improved, and a scientific basis is provided for oil and gas resource exploration.

The invention relates to the technical field of spectrum detection, in particular to a method for detecting the content of trace elements in quartz sand. The method comprises the following steps: acquiring spectral data of a quartz sand solution with gradient change of concentration; in each concentration spectrum, calculating an overlapping index according to the position and peak height difference of a spectrum peak and a previous spectrum peak, and screening abnormal spectrum peaks; analyzing the cross interference of the abnormal spectrum peak and the previous spectrum peak to obtain a distortion representation degree; obtaining the deviation influence degree according to the deviation of the abnormal spectrum peaks influenced by the silicon peaks among different concentrations, obtaining the concentration change interference degree according to the deviation amplitude variation trend of the distortion representation degree in the continuous concentration spectrum data in the ordered concentration, and correcting the spectrum data of the abnormal spectrum peaks to detect the content of the trace elements. According to the method, the spectrum data deviation of the quartz sand under the gradient concentration change is dynamically analyzed and quantified, so that the interference of the silicon element on the trace elements is eliminated, and the accuracy and reliability of the detection result of the content detection of the trace elements in the quartz sand are improved.

The invention discloses a method for detecting trace elements in a GH4169 high-temperature alloy by using secondary ion mass spectrometry, which specifically comprises the following steps: A1, firstly, carrying out necessary pretreatment on a GH4169 high-temperature alloy sample to remove surface pollution and an oxide layer; a2, selecting a time-of-flight secondary ion mass spectrometer, setting proper analysis parameters, and selecting a double-plasma O2 + ion source. The invention relates to the technical field of metal material trace chemical component analysis. According to the method for detecting the trace elements in the GH4169 high-temperature alloy by using the secondary ion mass spectrometry, a sample pretreatment process of the GH4169 high-temperature alloy is optimized, a double-plasma O2 + ion source and a low-energy electron gun charge compensation system of a time-of-flight secondary ion mass spectrometer are innovatively configured, deep analysis and a three-dimensional reconstruction algorithm are combined, and the trace elements in the GH4169 high-temperature alloy are detected. The sensitivity, the spatial resolution and the data reliability of trace element detection are obviously improved.

The silicon steel comprises the following components in percentage by weight: 0 to 0.005 percent of C, 1.3 to 2.8 percent of Si, 0.20 to 0.80 percent of Mn, 0 to 0.05 percent of P, 0.2 to 1.2 percent of Al, less than or equal to 0.005 percent of S, less than or equal to 0.005 percent of O, less than or equal to 0.005 percent of N, less than or equal to 0.003 percent of Nb, less than or equal to 0.003 percent of V, less than or equal to 0.003 percent of Ti, 0.001 to 0.005 percent of Ca, one or two of 0.02 to 0.15 percent of Sb, 0.02 to 0.15 percent of Sn and 0.1 to 0.4 percent of Cu, and the balance of Fe and inevitable impurities. By adding proper trace elements, adopting effective calcium treatment to control inclusions and matching with proper hot rolling, cold rolling and annealing processes, an unnormalized low-iron-loss high-magnetic-induction non-oriented silicon steel product is obtained. The minimum iron loss P15 / 50 of the manufactured non-oriented silicon steel product with the thickness of 0.5 mm is 2.73 w / kg, and the maximum magnetic induction intensity B50 / 50 can reach 1.735 T; the minimum iron loss P15 / 50 of the series with the thickness of 0.35 mm is 2.25 w / kg, and the maximum magnetic induction intensity B50 / 50 can reach 1.718 T.

The invention belongs to the technical field of chemical analysis of metallurgical standard samples, and discloses a super duplex stainless steel spectrum standard sample with high quality, high uniformity, high stability and accurate fixed value and a development method thereof. The method comprises the following steps: component design and raw material proportioning, smelting and casting, forging and homogenization treatment, primary inspection of uniformity and sample processing, uniformity inspection, constant value analysis and mathematical statistics, determination of characteristic values of standard samples, stability analysis of the standard samples after long-term storage, and traceability guarantee measures. The super duplex stainless steel spectrum standard sample comprises the following components in percentage by mass: 25%-26% of Cr, 6.50%-7.50% of Ni, 3.50%-4.50% of Mo, 0.23%-0.27% of N, 0.5%-1.0% of Cu, 0.5%-1.0% of W, and the balance of iron and inevitable impurities, and the content of trace elements including sulfur, aluminum and boron is controlled in a specific ppm level range.

The invention discloses a trace element compound premix granulating and screening device and an application method, and relates to the technical field of screening equipment.The trace element compound premix granulating and screening device comprises a base plate, a scrap screening speed control mechanism, a multi-stage screening mechanism, a screen drum radial vibration mechanism and a screen drum lifting and transferring mechanism; an inclined rectangular frame is mounted on the upper side of the seat plate through an inclined control assembly; the multi-stage screening mechanism comprises rotating sleeves, the rear side of the inclined rectangular frame is transversely and rotationally connected with three longitudinal rotating sleeves at equal intervals, the three rotating sleeves are all connected with a screen drum rotating power assembly, a prism is longitudinally and slidably connected into each rotating sleeve, and the front end of the prism in the middle is connected with a scrap screening assembly; according to the microelement compound premix granulating and screening equipment and the application method, a multi-stage screening mode is adopted, chippings and particles with the size exceeding the standard can be screened out, non-stop screen hole cleaning work can be achieved, and the particle screening efficiency can be improved.

The invention discloses a full-automatic trace element sample adding system, relates to the technical field of clinical diagnosis and detection, and solves the problems that whether a sample adding needle is added into a sample tube or not is difficult to analyze, and initial early warning is difficult to carry out; secondly, bubbles in a sample tube are difficult to detect and analyze according to a judgment result; next, the sample is difficult to identify and classify, and the content and distribution of trace elements in the sample are difficult to analyze according to an analysis result; and finally, the technical problem that the abnormal comprehensive index is difficult to comprehensively analyze according to various data for early warning is solved. Through the data acquisition module, the data processing module, the data analysis module and the comprehensive evaluation module, whether a sample adding needle is added into a sample tube or not is analyzed according to a video image, initial early warning is performed, and the detection efficiency is improved; the bubble influence coefficient, the sample deviation value, the microelement variation coefficient and the environmental pollution coefficient are comprehensively analyzed, and early warning is carried out.

The invention relates to the crossing field of mineralogy and geochemistry, in particular to a mineral and element relation analysis method for gold-bearing minerals based on image matching and data fusion and application of the mineral and element relation analysis method. Comprising the steps of ore sample processing, gold-bearing mineral image calibration through AMICS, trace element scanning through fixed-point EPMA and EDS, image-level matching and spatial data fusion and gold-bearing mineral-element relation analysis. According to the method, the AMICS mineral map and the EPMA element information are fused, relation analysis of trace elements in the gold ore and visual reconstruction of a mineral-element corresponding mechanism can be achieved, and effective data and image models are provided for microcosmic metallogenic information requirements in digital mine construction.

The invention provides a culture medium for tylosin fermentation. Specifically, the culture medium comprises a carbon source, a nitrogen source, inorganic salt and trace elements. The applicant optimizes the types and contents of a carbon source, a nitrogen source, inorganic salts and trace elements, so that the culture medium for improving the yield of tylosin is obtained. The culture medium disclosed by the invention is low in cost, and the yield of tylosin can be remarkably increased. Compared with the prior art, the method has the advantage that the yield of tylosin is increased by 27.95%.

The invention relates to the technical field of land reclamation, and discloses a soil trace element dynamic monitoring method and system for land reclamation, and the method comprises the steps: obtaining a soil element data set; autocorrelation analysis is carried out according to the soil element data set, spatial interpolation is carried out according to obtained autocorrelation characteristics, and an element spatial distribution diagram is obtained; performing time sequence analysis according to the soil element data set to obtain time change characteristics; performing space-time coupling according to the element space distribution diagram and the time change characteristics to obtain space-time prediction model parameters; performing Bayesian optimization according to the space-time prediction model parameters to obtain optimized prediction model parameters; and carrying out distribution prediction according to the optimized prediction model parameters, the element spatial distribution diagram and the time change characteristics to obtain a trace element prediction result, and carrying out visualization. The method has the following effect that the dynamic monitoring accuracy of the soil trace elements can be improved.

The invention relates to the technical field of spectral measurement, in particular to a portable human body rubidium microelement detector and a spectral detection method. Converting the spectral data to obtain an absorbance curve; carrying out data segmentation on the absorbance curve, and calculating to obtain a baseline drift degree of the absorbance curve based on a segmentation result; performing baseline correction on the absorbance curve based on the baseline drift degree in combination with an iterative adaptive baseline correction algorithm to obtain an absorbance curve after baseline correction; and comparing the absorbance curve after the baseline correction with a standard absorbance-concentration curve to obtain the concentration of the rubidium element. According to the method, for the phenomenon that the content of the rubidium element is relatively low, the baseline drift degree of the spectral data is analyzed in a targeted manner, and the baseline drift degree is set as an iteration termination condition of an iteration self-adaptive baseline correction algorithm, so that a baseline drift part in the spectral data is separated, and the accurate content of the rubidium element in a sample is obtained on the basis of conversion.

A spectrometer for detecting a trace element in an agricultural product and use thereof is provided. The spectrometer includes: a light source device configured to generate light required by spectroscopic detection; a convergence device configured to converge the light generated by the light source device; a chopping device configured to modulate a frequency of light converged by a convergence device; a filter device configured to shield light of a wavelength other than a preset wavelength; a detection device configured to receive light passing through a to-be-detected agricultural product and the filter device, and convert an optical signal into an electrical signal; and a processing device configured to generate spectroscopic analysis data according to the electrical signal outputted by the detection device and output a substance content analysis result according to the spectroscopic analysis data, where the preset wavelength of the filter device ranges from 400 nm to 5,000 nm.

The invention discloses application of a microelement complex in a feed additive, which comprises the following steps: mixing fresh kelp and water with the same mass as the fresh kelp, grinding and pulping to obtain kelp slurry, then adding compound enzyme into the kelp slurry, stirring and mixing uniformly, continuously adding boric acid and ammonium molybdate tetrahydrate under a magnetic field condition, stirring and mixing uniformly, and carrying out enzymolysis and chelation under an ultrasonic condition; sequentially adding zinc sulfate heptahydrate, ferrous sulfate heptahydrate, copper sulfate pentahydrate, cobaltous sulfate heptahydrate and manganese sulfate tetrahydrate while stirring, carrying out chelation reaction under a magnetic field condition, and centrifuging to take supernatant, so as to obtain a seaweed chelating solution; then adding maltose into the seaweed chelating liquid, uniformly stirring and mixing, continuously adding sodium selenite, and carrying out chelation reaction under the condition of a high-voltage pulsed electric field; and finally, continuously adding a beta-calcium polymalate aqueous solution under a magnetic field condition, carrying out ultrasonic oscillation treatment, and carrying out spray drying to obtain a complex of trace elements. The obtained complex of the trace elements can be used for preparing a feed additive, raw material sources are safe, and the complex has an obvious promoting effect on animal growth.

The invention relates to the field of trace element detection, in particular to a system for detecting the concentration of trace elements in water. The gas chamber is connected with the atomization device, is internally provided with a light path capable of dynamically adjusting the White cell, and is used for enhancing a spectral absorption signal of the low-concentration trace elements; the light path modulation module is mounted on the side wall of the gas chamber; the temperature control module is used for adjusting the temperature of the optical element and the air chamber; the spectrum detection module is arranged behind the light outlet of the gas chamber and is used for detecting a spectrum signal after the aerosol is absorbed; the ionization and mass spectrum module comprises an ionization source and a mass spectrometer, the ionization source is used for ionizing the aerosol in the gas chamber into ions, and the mass spectrometer is used for separating the ions according to the mass-to-charge ratio and detecting the ions. According to the invention, a spectrum and mass spectrum combined technology is adopted, a water sample to be detected is atomized into aerosol water drops, and high-sensitivity detection of trace elements in water is realized by enhancing a spectrum absorption signal of low-concentration trace elements.

The invention discloses a water-soluble fertilizer containing modified nano double-chelated medium trace elements, and belongs to the technical field of biological agriculture. The fertilizer is composed of sorbitol, glycerin, EDTA iron, EDTA zinc, potassium citrate, calcium citrate, magnesium sulfate heptahydrate, disodium ethylene diamine tetraacetate, an auxiliary agent and the like. The auxiliary agent is prepared from carboxymethyl chitosan, a modified nano auxiliary agent and polyethylene glycol, and the modified nano auxiliary agent is prepared from amylopectin, 8-hydroxyquinolone and isopropyl tri (dioctyl pyrophosphate acyloxy) titanate through a reaction. By adopting a double-chelation technology and a nanotechnology, the stability of trace elements in the fertilizer is remarkably improved, and nutrients are prevented from being lost and fixed in soil. And the absorption efficiency of the plants on elements such as iron, zinc and magnesium is improved by the nano-scale particles and the chelated nutrients. Field tests show that the fertilizer can significantly promote the growth of mung bean sprouts and improve the biomass and the content of medium trace elements in plants.

The invention provides a cultural relic age determination method and system, and relates to the technical field of cultural relic age determination, the method comprises the following steps: collecting a sample from a to-be-tested cultural relic, and cleaning, drying and crushing the sample to obtain a treated sample; performing elemental composition analysis on the sample through an energy dispersion X-ray fluorescence spectrophotometer to obtain the types and content ratios of main elements and trace elements in the sample; collecting similar cultural relic samples of known years, performing elemental composition analysis, and establishing a standard sample ratio of the known years; comparing the ratio of the types and contents of the main elements and the trace elements in the sample with the ratio of a standard sample of a known age, and fitting a calibration curve through a least square method according to a comparison data set; and optimizing the calibration curve, and calculating an absolute age estimation value of the cultural relic according to the optimized calibration curve. According to the method, interference of single element variation is reduced through multi-element correlation analysis, and historical relic age determination is carried out.

The invention relates to the technical field of mineral analysis, and discloses a mineral trace element detection method which comprises the following steps: S1, sample preparation; s2, spectrum acquisition; s3, processing spectral data; s4, selecting a characteristic wavelength; s5, constructing a spectral analysis model; s6, model training and verification; s7, trace element content prediction; and S8, outputting a result. According to the mineral trace element detection method, a large amount of spectral data can be rapidly collected by adopting the high-resolution spectrometer and the Fourier transform infrared spectrum technology, background noise is removed and the data quality is improved through the preprocessing step, the detection speed is increased, and the detection accuracy is improved. The method also improves the accuracy of a detection result through precise characteristic wavelength selection and optimization of a support vector machine algorithm, and particularly guarantees the generalization capability and prediction precision of the model through five-fold cross validation and grid search optimization of model parameters, thereby improving the detection efficiency while guaranteeing the accuracy and reliability of the detection method.

The invention relates to the technical field of geochemistry and logging, in particular to a method and system for predicting the content of major elements and microelements in marine shale, and the method comprises the steps: obtaining drilling coring and logging curve data, and carrying out the depth alignment of a feature response section and a coring section on a logging curve based on lithologic features; rock samples of different lithofacies are collected through a system, main trace element content testing is carried out, deep matching processing is carried out based on the characteristic response section after depth alignment, and main trace element content data and logging data are subjected to depth consistency integration; constructing a data set based on the main trace element content data and the logging data with consistent depth, and constructing a machine learning model by applying a random forest algorithm, the machine learning model performing hyper-parameter optimization and feature selection based on a multi-strategy improved sparrow search algorithm; and inputting the logging data with the depth to be predicted into the trained model to predict the content of the main quantity and the content of the trace elements.

The invention discloses a rare metal mineralization potential comprehensive evaluation method based on rock geochemistry, and aims to solve the problems of single evaluation index and disjunction between field observation and indoor analysis in the prior art. The method comprises the following steps: obtaining geological data of an analysis area, and screening a target area based on a favorable structure background and an exposed feature criterion; identifying mineralogical and lithofacies markers and collecting sampling data; the method comprises the following steps: acquiring rock geochemical data of a sample sampled by a previous person, including multi-dimensional data including major elements, trace elements, isotope composition and the like, and calculating a quantitative evaluation index according to the data; and finally, establishing a comprehensive evaluation model by adopting a weighted scoring method to realize mineralization potential grade division and target region accurate delineation in a three-dimensional space. According to the method, organic combination of macroscopic geologic features and microcosmic geochemical data is realized, and a complete technical system from field observation to indoor analysis to engineering decision is formed.

The invention discloses a microalloyed copper alloy, a preparation method and application, and the microalloyed copper alloy comprises the following components in percentage by mass: 0.05-2.0% of trace elements, 0.015-0.04% of P, and the balance of Cu and inevitable impurities. Wherein the trace elements comprise at least one of Ni or Zn. Mn can also be added into the copper alloy. According to the invention, the performance of the alloy is regulated and controlled by controlling the variety and proportion of the trace elements, so that the finally prepared copper alloy has excellent corrosion resistance and stress fatigue resistance on the basis of keeping good high strength, high pressure resistance and processability; the problems that an existing copper pipe is insufficient in pressure resistance and poor in corrosion resistance and fatigue resistance can be solved, and the copper pipe has wide application prospects in the fields of air conditioner refrigeration, electronic communication, aerospace and the like. Meanwhile, the copper alloy further has stable processing performance and meets the requirement for large-scale production.

The invention discloses a crack diagnosis method for multi-type tracer collaborative inversion of a propping agent laying condition, and belongs to the technical field of oil and gas field exploitation, and the method comprises the following steps: during fracturing construction, adding trace element tracers into each fracturing section of a horizontal well on the ground to prepare a fracturing fluid with a constant tracer concentration; in the sand-carrying fluid stage, a tracer film-coated propping agent is pumped into the crack of each fracturing section, so that the crack has a preset opening degree; flowback is carried out after fracturing and pump stopping, sampling is carried out at a wellhead of the horizontal well, and the concentration of the microelement tracer agent and the concentration of the carbon quantum dot tracer agent of each fracturing section are detected; according to the detection results of the trace element tracer and the carbon quantum dot tracer in each fracturing section, drawing charts of two curves of the trace element tracer and the carbon quantum dot tracer in the same fracturing section, wherein the concentrations of the trace element tracer and the carbon quantum dot tracer change along with time; analyzing according to the characteristics of the two curves in the drawn chart, and determining the propping agent laying condition and the crack closing condition of each fracturing section.

The invention relates to a high-strength and high-conductivity Cu-Zr alloy material added with trace elements and a preparation method of the high-strength and high-conductivity Cu-Zr alloy material, and belongs to the technical field of copper alloy preparation and processing. The copper alloy is prepared mainly through a combined deformation heat treatment process, the prepared copper alloy has high strength and excellent conductivity and plasticity, the heat stability of the alloy is improved, and the copper alloy can be used as a lead frame, a rectifier device, a high-temperature-resistant copper alloy material, a high-temperature-resistant copper alloy material, a high-temperature-resistant copper alloy material, a high-temperature-resistant copper alloy material, a high-temperature-resistant copper alloy material, a high-temperature-resistant copper alloy material and a high-temperature-resistant copper alloy material. The method is applied to advanced fields such as rail transit and electrical electronics.

The invention relates to the technical field of oil liquid detection, in particular to an oil liquid remote monitoring system and a monitoring method thereof, and the system comprises an oil liquid component monitoring module, a spectral feature analysis module, a component cross interference compensation module, an abnormal component screening module and an intelligent early warning module. According to the invention, continuous tracking of trace elements and chemical substances in the oil liquid is realized through real-time remote monitoring and data analysis of the spectrometer, monitoring of metal elements and oxides is more accurate by using a data processing technology, tiny changes of components can be captured in real time, and through detailed analysis of the spectral absorptivity, the detection accuracy of the oil liquid is improved. The system can identify potential anomalies and allow timely intervention at the initial stage of change, so that equipment failure or performance reduction is avoided, coupling weight and deviation value analysis are comprehensively utilized, understanding of complex interaction is greatly enhanced, and a comprehensive decision support basis is provided for risk management and early warning.

The invention discloses a trace element content measuring method, and relates to the technical field of metallurgical analysis, the method comprises the following steps: obtaining a plurality of standard reference substances, the matrix components of the plurality of standard reference substances are the same, and the standard contents of the same trace element to be measured in the plurality of standard reference substances are in stepped distribution; under a preset test condition, based on the standard relative sensitivity factor, respectively testing the plurality of standard reference substances through glow discharge mass spectrometry to generate the test content of the to-be-tested trace element; based on the test content and the standard content, determining a calibration proportionality coefficient corresponding to the to-be-tested trace element; based on the calibration proportionality coefficient, calibrating the standard relative sensitivity factor to generate a calibration relative sensitivity factor; and testing the to-be-tested sample through glow discharge mass spectrometry based on the calibration relative sensitivity factor under a preset test condition, and determining the test content of the to-be-tested trace element in the to-be-tested sample.

The invention belongs to the technical field of trace element detection, and particularly relates to a trace element detection device which comprises a storage box, an access hole is formed in the front end of the storage box, a detachable cover plate is clamped in the access hole, a moving cavity opening is formed in the upper side of the storage box, and a protection plate is clamped in the moving cavity opening. A lifting mechanism is fixed to the rear end of the interior of the storage box, a vertical plate is fixed to the front end of the lifting mechanism, and the upper side of the vertical plate is fixedly connected with the lower side of a protection plate. The trace element detector is clamped and fixed to the interior of the storage box, and when the trace element detector needs to be used, the trace element detector can be moved to the exterior of the storage box; and when not in use, the device can be moved into the storage box to be effectively protected, accidental collision and damage are avoided, and the device is small in size and can be carried at will by directly carrying the storage box.

The invention discloses a new-type barite deposit mineralization mode construction method based on a same sedimentary fault. The method belongs to the field of geological exploration and mineral resource prediction, and comprises the following steps: analyzing the earth crust cracking activity history of an earthquake-Hangjian broken basin, and recovering a basin'checkerboard 'structure prototype; by means of field geological survey and research, drilling engineering, geophysics, remote sensing geological big data and the like, north-east-east-direction and north-west-direction co-sedimentary fault networks are identified and modeled, and a deep metallogenic fluid rising and jet flow channel is determined; the metallogenic process is concluded into a hydrothermal jet flow stage and an underwater gravity flow deposition stage, deep fluid is revealed to rise, jet flow and precipitate along a fault, and an ore-rich zone of a composite seabed fan body group is formed; and a geochemical prospecting prediction model combining trace element and sulfur isotope characteristics is established. The method systematically clarifies a coupling mechanism of ore control of the same sedimentary fault, ore-forming fluid migration and gravity flow deposition, and provides a theoretical basis and a technical means for prospecting prediction of the barite deposit in the Hendan-Hangjian fault basin.

The invention relates to the technical field of quartz product detection, in particular to a device and method for testing local trace element pollution on the surface of a quartz glass component, and the device comprises an objective table; a to-be-tested quartz glass part sample is fixed on the objective table, and at least one sampling hole leading to the surface of the to-be-tested quartz glass part sample is formed in the objective table. The testing method comprises the following specific steps: S1, placing a quartz glass part sample to be tested on the testing device; s2, a sampling solution with the volume of V1 is added into a sampling hole in the testing device, after a certain period of time, the sampling solution is recycled from the sampling hole, and finally a to-be-tested solution with the volume of V2 is obtained; and S3, testing the solution to be tested in the bottle by using an ICP-MS (Inductively Coupled Plasma Mass Spectrometry) to obtain the trace element content on the local surface of the quartz glass part. The specific area of the quartz glass component can be accurately detected, and the defect that local pollution data cannot be provided by an overall soaking method is overcome.

The invention relates to the technical field of soil conditioners, in particular to a mineral type soil conditioner and a production process thereof. The invention overcomes the problem of insufficient soil fertility caused by enhanced toxic action of cations in soil and insufficient trace elements in soil. By screening the particle size of the fly ash, the adsorption rate of the soil conditioner to the heavy metals in the soil is improved; by controlling the adding amount of the KOH solid powder, the adsorption amount of the modified fly ash to lead and cadmium in the soil is increased; the content of exchangeable aluminum in the soil is reduced by controlling the adding amount of deionized water in the calcined material and the standing and aging time; by roasting the mixture at different temperatures, the content of calcium and magnesium in the soil is increased; by changing the adding parts of the water, the polyacrylamide, the limestone and the montmorillonite, the performance of the soil conditioner for solidifying the trace elements is further improved.

The present invention discloses a method for quantitative determination of trace harmful elements in various flotation products of rare polymetallic ores, which includes three parts: sample processing, preparation of complex matrix standard solution and sample testing. Each flotation product is digested with analytically pure concentrated nitric acid; the main mineral species of each product are determined by XRD, and the high-purity standard substances of each main associated mineral are digested with analytically pure concentrated nitric acid, and the content of harmful elements to be monitored is determined by ICP-MS after appropriate dilution; each standard substance digestion solution is diluted to a major element concentration of 1000μg / mL, and used to dilute the harmful element standard stock solution to obtain standard solutions with different concentration gradients; then the process blank and digestion sample are tested using an inductively coupled plasma mass spectrometer using a combination of internal standard method and matrix matching to obtain the content of trace harmful elements to be measured. It effectively overcomes the mass spectrometry and non-mass spectrometry interference problems faced by complex matrix sample testing, is suitable for the analysis and testing of trace element content in complex samples, and has a simple method and is easy to operate.

The invention discloses a culture base material for lepista sordida rich in strontium, zinc and germanium as well as a preparation method and application of the culture base material, and relates to the technical field of edible mushrooms. The culture base stock is prepared from the following raw materials: a nitrogen source, a carbon source, inorganic salt, spirulina, polyglutamic acid and compound bacteria, the compound bacteria comprise aspergillus niger, lactobacillus cavings-like and candida utilis; the culture base stock comprises trace elements; the trace elements comprise at least one of strontium, zinc and germanium. The culture base stock can effectively shorten the growth cycle of lepista sordida, improve the yield and the biotransformation rate, reduce the cost and promote enrichment of trace elements such as strontium, zinc and germanium in lepista sordida.