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Распределение пор по размерам ЯМР-анализатор
The pore sizes distribution is an important characteristic of materials, especially in fields such as materials science, химия, и геология. It can significantly affect the properties and behavior of the material, including its permeability, площадь поверхности, adsorption capacity, and mechanical strength.
Распределение пор по размерам Measuring Methods
There are several methods and techniques used to determine распределение пор по размерам. Some of the commonly used techniques include:
- Mercury Intrusion Porosimetry: This method involves immersing a sample in a mercury bath and applying increasing pressure to force the mercury into the pores. By measuring the volume of mercury intruded at different pressures, тот распределение пор по размерам can be determined.
- Gas Adsorption: Gas adsorption techniques, such as nitrogen adsorption using the Brunauer-Emmett-Teller (BET) method, can provide information about the specific surface area and распределение пор по размерам of porous materials. The adsorption isotherms obtained at different relative pressures can be analyzed using various models, such as the Barrett-Joyner-Halenda (BJH) method or the density functional theory (DFT), to determine the распределение пор по размерам.
- Capillary Flow Porometry: This technique involves applying a wetting liquid to a sample and measuring the flow rate through the material. The capillary flow porometry method can provide information about the распределение пор по размерам and pore connectivity.
- Electron Microscopy: Scanning electron microscopy (SEM) or transmission electron microscopy (TEM) can be used to examine the surface and internal structure of materials at high magnification. These techniques can provide qualitative information about pore sizes distributions.
Распределение пор по размерам Measuring by NMR
In NMR, a sample is subjected to a strong magnetic field, which causes the nuclei of certain atoms within the sample to align with or against the magnetic field. A radio frequency (РФ) pulse is then applied to the sample, which causes the nuclei to absorb energy and become excited. When the RF pulse is turned off, the nuclei return to their original state, releasing the absorbed energy as electromagnetic radiation. This radiation is detected by an antenna, and the resulting NMR spectrum provides information about the chemical and physical properties of the sample.
In the case of rock core распределение пор по размерам анализ, NMR can be used to study the properties of the minerals and fluids within the rock sample. The NMR spectrum provides information about the number of hydrogen atoms in the sample, their chemical environment, and the amount of fluid present in the sample. This information can be used to determine the porosity, проницаемость, and fluid content of the rock, as well as the composition and structure of the minerals present.
Распределение пор по размерам Measuring by NMR Advantages
Ядерный магнитный резонанс (ЯМР) instrument has several advantages as a technique for studying the properties of molecules and materials:
Неразрушающий: NMR is a non-destructive technique that allows for the analysis of samples without altering their chemical or physical properties.
Универсальный: NMR can be used to study a wide range of materials, including organic compounds, inorganic compounds, полимеры, белки, and even intact cells.
Quantitative: NMR can provide quantitative information about the concentration and distribution of different components within a sample.
Structural information: NMR can provide detailed structural information about molecules, including their three-dimensional shapes, межатомные расстояния, and chemical environments.
High resolution: NMR has high resolution and can distinguish between different chemical groups within a sample, even in complex mixtures.
No radiation exposure: Unlike other analytical techniques such as X-ray crystallography, NMR does not involve exposure to ionizing radiation, making it safer for both the user and the sample.
Minimal sample preparation: NMR requires minimal sample preparation, often only requiring the sample to be dissolved in a suitable solvent.
Распределение пор по размерам NMR of Niumag
Распределение пор по размерам NMR refers to a series of NMR instruments manufactured by Niumag Corporation.
Niumag NMR instruments use a low-field, permanent magnet design that allows for high sensitivity and resolution while maintaining a compact size and affordable cost. These instruments offer a variety of features, including automated shimming, контроль температуры, and a user-friendly interface for data analysis and processing.
The Niumag NMR instruments can be used for a variety of applications, such as quality control, research and development, and process monitoring. They are particularly useful for analyzing the composition, состав, and properties of materials, including polymers, chemicals, food products, фармацевтика, and geological samples.
The Niumag NMR instruments are available in several models with different field strengths and sample sizes, ranging from 0.5 Тесла в 2.0 Тесла. These instruments are widely used in academia, исследовательские лаборатории, and industrial settings for a variety of applications in materials science, химия, геология, and other fields.
