12 results about "Isotope analysis" patented technology

This invention relates to the field of mineral deposit exploration technology, specifically disclosing a method for determining the extension of magmatic hydrothermal deposits using fluid inclusions. The method involves collecting mineral samples containing fluid inclusions from the target deposit and its surrounding area using a systematic grid. Physicochemical parameters are obtained through petrography, microthermometry, and isotope analysis, and a spatial database is established. Multiple initial hydrothermal centers are identified. A multi-dimensional spatial constraint field is constructed, incorporating temperature-salinity-isotope gradients, mineralization depth, and magma-water mixing ratio. Using the initial centers as seed points, a neighborhood search is performed along the gradient synthesis direction. Sub-hydrothermal centers are generated and continuously grow when preset conditions are met, until an overlap threshold is reached, at which point iteration stops. All hydrothermal centers and growth paths are integrated to construct a spatial extension model. High-potential areas are screened using a target area evaluation index, and the extension direction and potential mineralization target areas are determined by combining the mineralization depth. This significantly improves the accuracy of concealed ore body prediction and the efficiency of mineral exploration.

This invention provides an apparatus, system, and method for analyzing altered carbonate carbon isotopes. The apparatus includes: an enrichment component comprising at least one enrichment tube having an enrichment section; and a freezing component comprising a container filled with a refrigerant. The enrichment section is completely immersed in the refrigerant to freeze the target gas generated by sample decomposition within the enrichment section to a target concentration. Based on the technical solution of this invention, analysis of low-content altered carbonate carbon isotopes can be achieved; it can also simultaneously acquire multiple sets of samples required for altered carbonate carbon isotope analysis, saving time for detecting large quantities of altered carbonate carbon isotopes. Furthermore, the operation is simple, reducing analytical costs and providing a reliable technical means for the application of geochemical exploration technology.

This invention discloses a pretreatment device for precise quantification and isotope analysis of dissolved organic nitrogen, including an extraction and filtration device for extracting and filtering the sample; and a separation and purification device connected to the extraction and filtration device for separating and purifying the extracted and filtered solution to obtain purified dissolved organic nitrogen. The separation and purification device is an electrodialysis device, or it includes an aluminum electrode ionization system, an anion and cation exchange membrane, and a fractional purification system. This invention provides a basis for rapidly and accurately analyzing the isotope content of dissolved organic nitrogen and phosphorus in sediments and effectively tracing the source of dissolved organic nitrogen and phosphorus based on the detection results.

This invention belongs to the field of isotope analysis technology, specifically relating to environmental tracing and geochronological studies of the cosmogenic nuclide beryllium-10. It discloses an automated collection device and method for purifying the cosmogenic nuclide beryllium-10. The device constructs an automated chain of online reaction, real-time monitoring, and intelligent diversion, eliminating reliance on manual solution collection experience. The mixed reaction module precisely proportions the eluent, buffer solution, and chromogenic solution, creating a specific instantaneous chromogenic environment for beryllium ions. Combined with an optical detection module, it can capture color signals in real time and convert them into digital signals. The control module drives the fluid switching module at millisecond levels based on preset signal thresholds, accurately separating the target product from the waste liquid. This mechanism can accurately identify the start and end points of the elution peaks of the target element, solving the problem of beryllium-10 loss caused by complex sample matrices or resin aging. Through standardized photoelectric detection, it ensures high recovery rates and purity requirements for ultra-trace beryllium-10 analysis.

This invention discloses a method for Hf isotope analysis in geological samples, belonging to the field of chemical analysis technology. The method includes the following steps: dissolving the geological sample to obtain a sample solution; chemical separation and enrichment, loading the sample solution into an ion exchange column loaded with UTEVA extraction resin to separate and enrich hafnium from the sample solution; and mass spectrometry analysis, where the Hf element obtained from the 0.3 mol / L nitric acid solution can be directly analyzed using a multi-collector inductively coupled plasma mass spectrometer combined with membrane desolvation injection to obtain high-precision Hf isotope mass spectrometry results. This method can separate and enrich Hf element in geological samples, is simple and fast to operate, highly efficient, low in cost, and has a low background and high recovery rate, making it particularly suitable for Hf isotope analysis in geological samples with low Hf content.

This invention discloses a method for identifying the bio-based properties of liquid fuels based on a liquid scintillation counter. 14 C isotope analysis is used to determine the bio-based content of liquid fuels, thereby identifying whether the liquid fuel is bio-based, fossil-based, or a mixture of bio-based and fossil-based. The steps include: S1, optimizing the experimental parameters of the liquid scintillation counter; S2, determining the sample counting efficiency; S3, determining the background sample... 14 β decay count of C; S4, calculate the bio-based content of the sample using a combination formula.

Described are techniques for distinguishing between biomethane and fossil methane using isotopic analysis. Examples include evaluating a methane source using radioisotope analysis stable isotope analysis. In some cases, radioisotope analysis is used for purposes of calibrating a stable isotope analysis technique or for verifying precision or reliability of a stable isotope analysis result.

This invention discloses a method for dissolving dual-labeled nitrogen gas in water ( 15 The preparation and quantification method of N2 standard samples belongs to the field of stable isotope analysis technology. This method will... 15 N-labeled ammonium chloride solution reacts with sodium hypochlorite in a completely sealed reaction flask filled with liquid and without a headspace, resulting in in-situ formation and dissolution. 15 N 15 Nitrogen gas was directly measured in its dissolved state in the liquid phase using membrane sample mass spectrometry (MIMS). 15 N 15 The m / z 30 characteristic signal of N was obtained by simultaneously monitoring the concentrations of residual monochloramine, dichloramine, and trichloramine in the reaction solution, and corrected based on the principle of nitrogen conservation. 15 N 15 The true concentration of nitrogen (N). This invention eliminates the need for gas collection, transfer, and cold trap purification throughout the entire process, avoiding nitrogen escape losses; chloramine correction significantly improves quantitative accuracy. It is simple to operate and allows for the flexible preparation of a series of concentration standards ranging from 10 to 1000 μmol / L. The signal drift of the standards is less than 3% within 30 days, making it suitable for isotope ratio mass spectrometry calibration, denitrification tracing, and isotope analysis of dissolved nitrogen in environmental water samples.

The present application relates to the element analysis-based multivariate statistical analysis method, system and medium, belong to technical field, the present application is through according to the target marine product sample's δ 18 O value, historical temperature and salinity data of each target water area Construct inversion prediction model, so as to utilize the inversion prediction model to invert the water temperature change curve and water salinity change trend data experienced by the current marine product during the whole growth period, finally according to the water temperature change curve and water salinity change trend data experienced by the current marine product during the whole growth period Dynamic matching, locking the most possible growth area, and correcting the source in combination with the event log occurred in the target area.The present application upgrades stable isotope analysis from simple origin fingerprint comparison to the application of paleoenvironment reconstruction technology in marine product tracing, utilizes the characteristics of shell body recording environmental information, traces through physical model inversion and time series data matching, the method is scientific and rigorous, and the result is more persuasive.

This invention relates to the field of plant water source ratio calculation technology, and discloses a normalized method for calculating the plant water source ratio, comprising the following steps: S1, data acquisition, determining the isotopic composition of xylem water and soil water in each layer through stable water isotope analysis; S2, contribution ratio calculation, calculating the contribution ratio of each soil layer to plant water; S3, water source score calculation, calculating the water source score WSS according to the formula; S4, evaluation and application, constructing the relationship with ecosystem variables through the WSS score. By normalizing the water source score WSS value from 0 to 1, and eliminating absolute depth differences through mathematical standardization, the research results of different regions or different soil stratification schemes are directly comparable, thereby solving the defect of traditional methods that cannot be compared horizontally due to the subjectivity of depth boundaries, and realizing an objective comparison of the degree of plant deep water dependence across regions.

The application discloses a Populus euphratica clonal daughter plant water utilization strategy optimization method based on split infiltration wheel irrigation, and relates to the technical field of desert plant ecological restoration, and the specific steps of the optimization method are as follows: a split infiltration wheel irrigation ecological restoration test area is selected, a root breaking area is divided and a root breaking ditch is excavated, and three irrigation modes are adopted for treatment; after three years, a clonal daughter plant-mother plant pair is determined as a research object in September; multiple types of samples are synchronously collected and stored in a low temperature state; samples are treated and indexes are determined; the water contribution proportion is quantified by comparison and a model, the optimal irrigation mode is determined, and the water utilization strategy is optimized; by combining the multi-mode irrigation and the isotope analysis technology, the application accurately analyzes the water source of the Populus euphratica clonal daughter plant, breaks through the traditional experience-driven mode, improves the water resource utilization efficiency, simultaneously, the Bayesian model is used to quantize the water absorption difference of the clonal daughter plants of different ages, a theoretical basis is provided for formulating a differentiated irrigation scheme, and the sustainable restoration of the ecological system is promoted.