11 results about "Microanalysis" patented technology

The invention belongs to the technical field of metal material micro analysis / welding processes, and particularly relates to an in-situ imaging method for the three-dimensional morphology of small-size inclusions of weld metal. According to the method, a weld metal sample is sequentially subjected to annealing, grinding and polishing, electrolysis and scanning electron microscope sample preparation, and an observable sample is obtained; wherein an organic electrolyte used for electrolysis is prepared from the following components in percentage by mass: 0.9 percent to 1.1 percent of tetramethylammonium chloride, 0.3 percent to 0.8 percent of triethanolamine, 8 percent to 12 percent of acetylacetone, 4 percent to 6 percent of glycerol, 0.4 percent to 0.8 percent of diphenylguanidine, 0.2 percent to 0.4 percent of triphenylphosphine oxide, 0.08 percent to 0.15 percent of sodium metavanadate and the balance of absolute methanol. According to the method, the three-dimensional morphology of the inclusions in the weld metal can be developed in situ.

The present application relates to the field of particle track microanalysis technology, and is a heavy ion track positioning method suitable for microseeds. The present application mainly uses a scanner to scan a biological stack, uses mapping software to process the scanning diagram, obtains a picture of a single seed hole, and acquires position information of seeds in the seed hole, uses a VHX microscope to scan a CR39 detection sheet, acquires passive detection information of each seed hole, and superimposes the passive detection information on the picture processed by the mapping software, analyzes radiation detection conditions at the Arabidopsis thaliana seeds, and further converts data to acquire various radiation information of the individual Arabidopsis thaliana seeds. The present application is committed to batch processing, rapid, high-precision processing of returned detection sheets. In terms of batch degree, the whole process is batch processing, and related software can be used to automatically output batch pictures and data, thereby reducing the degree of manual participation.

The utility model provides a kind of ion grinding high-resolution in-situ microscopic analysis device, the ion grinding high-resolution in-situ microscopic analysis device includes vacuum chamber;Sample stage for carrying the sample to be measured is set in vacuum chamber;Ion grinding unit, the ion grinding unit includes the ion beam emission end extended into vacuum chamber;High-resolution in-situ microscopic analysis unit, the high-resolution in-situ microscopic analysis unit includes the image acquisition end extended into vacuum chamber;And with the processor of high-resolution in-situ microscopic analysis unit electrical connection;The ion grinding unit is used to emit ion beam to the sample to be measured and is ground, obtains the target cross section of target area;The high-resolution in-situ microscopic analysis unit is used to obtain the two-dimensional image of the target cross section;The processor is used to carry out three-dimensional reconstruction to the two-dimensional image, obtains the three-dimensional imaging of the target area.

The present application relates to a kind of low content component energy spectrum analysis method, belong to metallurgical dust resource utilization and material microanalysis technical field.The method includes: preparation sample exposure center section, obtain full section image by scanning electron microscope image splicing, and different analysis regions are divided;Low multiple energy spectrum area scanning is carried out in each analysis region, and the element distribution and zinc content data of multiple positions are obtained;For each analysis region, the arithmetic mean of residual zinc content is calculated as the regional representative value;Based on the characteristic data image of zinc element distribution, high multiple energy spectrum area scanning and point scanning are carried out on the characteristic micro area of zinc element aggregation to analyze the phase form and element composition of residual zinc.The present application realizes the quantitative, zoned, spatial positioning and multi-scale characterization of residual zinc content distribution and occurrence state in metallized pellet by "overall observation-zoned statistics-micro area analysis" progressive analysis, provides more accurate data support for process optimization.

The invention relates to the technical field of chemical detection, and particularly discloses a preparation method and application of fluorescent carbon dots for detecting methylene blue. A carbon dot probe shows extremely high sensitivity to methylene blue, is remarkably superior to the prior art, realizes wide-range detection of 0.1-300 [mu] M and is far superior to 0.1-12 [mu] M in the prior art; the method can adapt to low-concentration microanalysis or detection of high-concentration industrial wastewater, meets the requirement for real-time rapid detection, is innovatively combined with a smart phone color recognition technology, and can complete quantitative detection only through an ultraviolet lamp or a smart phone. By extracting the color component ratio of the fluorescence image, the linear relationship between the color and the concentration is established, so that convenient detection with limited resources such as field water quality monitoring on site is carried out. In the environment with a large number of interfering substances, the detection result is hardly influenced, the accuracy of complex actual water sample detection is ensured, the adding standard recovery rate in the actual water sample is 92.1-103.3%, the relative standard deviation is small, and the method has obvious accuracy and reliability in actual environment monitoring.

The invention discloses a pesticide residue trace detection method for fragile berry agricultural products, and relates to the field of microanalysis, the detection method comprises the following steps: S1, placing berries to be detected in a lauryl sodium sulfate aqueous solution for treatment; s2, carrying out droplet contact by using a mixed organic solvent, and collecting an extracting solution; s3, concentrating and redissolving the extracting solution, and purifying and enriching through a solid-phase extraction column to obtain a to-be-detected solution; and S4, based on an enzyme inhibition principle reaction, determining absorbance change and calculating an inhibition ratio, and completing qualitative or semi-quantitative analysis on the organophosphorus and carbamate pesticide residues. A non-destructive surface pretreatment and in-situ micro-extraction method is adopted, the somatic cell structure of the fruit does not need to be damaged, the release of endogenous substances such as polyphenol, organic acid, saccharide pigments and the like in cells is avoided, and the accuracy and reproducibility of target pesticide signals in subsequent analysis can be ensured, so that main matrix interference is eliminated; and a clean sample basis is provided for trace detection.

This invention belongs to the field of pathogen activity analysis technology. It discloses an optical chemiluminescence trace analysis system for pathogenic bacteria. The system includes: constructing a set of discrete reaction sites of the target pathogenic bacteria on an immobilized capture interface in the sample; performing a chemiluminescence reaction on the set of discrete reaction sites to generate a local chemiluminescence response sequence and a luminescence spatial distribution sequence; obtaining the spatial response trajectory of the target pathogenic bacteria by analyzing the lighting sequence of each discrete reaction site and the expansion and aggregation characteristics in the site's neighborhood; obtaining the pathogenic bacteria activity determination result by analyzing the consistency of continuous luminescence at different discrete reaction sites and the branching and converging characteristics of the outward expansion path in the spatial response trajectory; and outputting a conclusion on the presence of pathogenic bacteria. This invention improves the stability of trace pathogenic bacteria detection and enhances the ability to distinguish weak positives and activity.

This invention provides a comprehensive investigation system for the boron enrichment mechanism of metamorphic rocks based on micro-area in-situ technology. The system comprises a sample target preparation and characterization module, a combined micro-area in-situ analysis module, a data integration and processing module, and a spatiotemporal correlation and evolutionary sequence reconstruction module, connected sequentially. By establishing a unified spatial coordinate system, multiple micro-area analysis instruments, such as electron probe microanalysis, laser ablation mass spectrometry, and ion probe microanalysis, are sequentially invoked to perform collaborative analysis on the same sample target, obtaining data on mineral composition, trace elements, boron isotopes, and zircon U-Pb-Hf isotopes. The system automatically fuses multi-source data and intelligently identifies mineral generations, and couples geochemical models with machine learning algorithms to construct an evolutionary sequence model of boron geochemical behavior with absolute time as the axis, achieving a quantitative characterization of the entire process of boron source, migration, and enrichment in an open system. This invention significantly improves the systematicness and accuracy of research on boron enrichment mechanisms in metamorphic rocks.

Techniques for preparing a powder sample for charged particle beam microanalysis are described. A method for preparing a powder sample includes providing a silicon section configured with an uneven edge. The method includes positioning the silicon section on aluminum foil with the uneven edge adjacent to the foil. The method includes placing a powder sample on the foil. The method includes sliding or pushing the silicon section across the powder sample so that the uneven edge contacts and entrains the powder. The method also includes covering the entrapped powder with a sealant such as silver paint or carbon paint to encapsulate the particles.

Title: Pollutant Microanalyzer and Associated Process The invention relates to a device for analyzing a pollutant contained in a gaseous phase, comprising: - sampling means capable of sampling said gaseous phase and generating a flow stream, - capture means capable of allowing said gaseous phase and the trapping liquid solution to flow on either side of a porous membrane, and of transferring said gaseous pollutant to the trapping solution, reaction means connected to the capture means, capable of reacting the enriched trapping solution with the pollutant, to generate a reaction product, - means for analyzing the reaction product capable of analyzing said reaction product in solution and deducing therefrom a measurement of the concentration of said pollutant in the gaseous phase.The device is characterized in that it also comprises: - a reference gas inlet connected to the capture means and capable of supplying the capture means with a flow of reference gas, and - a valve device such as a three-way valve disposed upstream of the capture means to supply the capture means alternately with said gaseous phase comprising the pollutant, or with said reference gas. Figure for the abbreviation: Fig. 1,

The application provides a method for in-situ micro-area determination of mineral element content, and relates to the field of mineral measurement. The method for in-situ micro-area determination of mineral element content comprises the following steps: preparing a polished section of an ore sample; identifying target mineral particles in the polished section and taking a backscattered image to obtain the content of target elements in multiple particles; measuring the area of each particle to be measured, calculating the proportion of the area of each particle to be measured in the total area of all particles to be measured, and obtaining the area occupancy rate of each particle; multiplying the content of the target element of each particle by the corresponding area occupancy rate, summing up, and obtaining the area-weighted average content of the target element. The element content value obtained by the method can more truly reflect the average chemical composition of the mineral in the whole ore, provide more accurate data basis for the prediction of beneficiation process indicators, and solve the problem of ignoring the influence of the size of the mineral particle size on the representativeness of the final data.