field desorption

简明释义

场解吸

英英释义

例句

1.The technique of field desorption is essential for analyzing trace amounts of substances in forensic science.

在法医学中，场脱附技术对于分析微量物质至关重要。

2.Researchers have developed a new method that enhances field desorption efficiency for environmental samples.

研究人员开发了一种新方法，提高了环境样品的场脱附效率。

3.The application of field desorption has revolutionized the detection of pollutants in water sources.

在水源污染物检测中，场脱附的应用引发了革命性的变化。

4.By using field desorption, scientists can obtain high-resolution spectra from complex mixtures.

通过使用场脱附，科学家可以从复杂混合物中获得高分辨率光谱。

5.In mass spectrometry, field desorption allows for the direct analysis of solid samples without prior treatment.

在质谱分析中，场脱附允许对固体样品进行直接分析，无需预处理。

作文

Field desorption is a crucial process in the realm of surface science and analytical chemistry. It refers to the phenomenon where molecules are released from a solid surface into the gas phase under the influence of an external electric field. This process is particularly significant in mass spectrometry, where it is used to analyze various compounds with high sensitivity and specificity. The ability to desorb ions from surfaces efficiently allows researchers to study materials at the molecular level, providing insights into their structure and composition.One of the primary applications of field desorption (场脱附) is in the analysis of organic compounds. In traditional methods, samples often need to be vaporized before they can be analyzed, which may lead to the loss of some volatile components. However, with field desorption (场脱附), the molecules can be desorbed directly from the surface without the need for prior heating or chemical treatment. This not only preserves the integrity of the sample but also enhances the detection of trace amounts of substances that would otherwise be overlooked.The mechanism behind field desorption (场脱附) involves the application of a strong electric field, which lowers the energy barrier for desorption. When an electric field is applied to a surface coated with the sample, the charged particles gain enough energy to overcome the attractive forces holding them to the surface. This results in the release of ions, which can then be analyzed using mass spectrometry techniques.Moreover, field desorption (场脱附) has proven to be advantageous in various fields such as environmental monitoring, pharmaceuticals, and forensic science. In environmental studies, it can be used to detect pollutants on soil or water surfaces, providing valuable data for assessing contamination levels. In the pharmaceutical industry, it aids in the characterization of drug compounds, ensuring that formulations meet regulatory standards. Forensic scientists utilize field desorption (场脱附) to analyze substances found at crime scenes, helping to identify unknown materials and provide evidence in legal cases.Despite its advantages, field desorption (场脱附) is not without challenges. The efficiency of the desorption process can be influenced by various factors, including the nature of the surface, the strength of the electric field, and the properties of the molecules being desorbed. Researchers continue to explore ways to optimize these parameters to improve the overall effectiveness of the technique.In conclusion, field desorption (场脱附) is a powerful analytical tool that facilitates the direct analysis of materials at the molecular level. Its ability to desorb ions efficiently from surfaces has opened new avenues for research and application across multiple disciplines. As technology advances, the potential for field desorption (场脱附) to contribute to scientific discovery and innovation will undoubtedly grow, making it an essential area of study in modern chemistry and material science.

场脱附是表面科学和分析化学领域中的一个关键过程。它指的是在外部电场的影响下，分子从固体表面释放到气相中的现象。这个过程在质谱分析中尤其重要，因为它用于高灵敏度和特异性地分析各种化合物。有效地从表面脱附离子的能力使研究人员能够在分子水平上研究材料，从而提供有关其结构和组成的深入见解。场脱附的主要应用之一是在有机化合物的分析中。在传统方法中，样品通常需要在分析之前蒸发，这可能导致一些挥发性成分的损失。然而，使用场脱附，分子可以直接从表面脱附，而无需事先加热或化学处理。这不仅保留了样品的完整性，还增强了对微量物质的检测，这些物质在其他情况下可能会被忽视。场脱附背后的机制涉及施加强电场，降低脱附的能量障碍。当电场施加到涂有样品的表面时，带电颗粒获得足够的能量以克服将其固定在表面上的引力。这导致离子的释放，这些离子随后可以使用质谱技术进行分析。此外，场脱附在环境监测、制药和法医学等多个领域证明了其优势。在环境研究中，它可以用于检测土壤或水表面的污染物，为评估污染水平提供有价值的数据。在制药行业中，它有助于药物化合物的表征，确保制剂符合监管标准。法医科学家利用场脱附分析在犯罪现场发现的物质，帮助识别未知材料并在法律案件中提供证据。尽管有其优势，场脱附也不是没有挑战。脱附过程的效率可能受到多种因素的影响，包括表面的性质、电场的强度以及被脱附分子的特性。研究人员继续探索优化这些参数的方法，以提高该技术的整体有效性。总之，场脱附是一种强大的分析工具，可以促进对材料在分子水平上的直接分析。其有效地从表面脱附离子的能力为多个学科的研究和应用开辟了新途径。随着技术的进步，场脱附对科学发现和创新的贡献潜力无疑会增长，使其成为现代化学和材料科学中一个重要的研究领域。