单词 | fast atom bombardment |
释义 | fast atom bombardmentfast atom bombardmentA technique of mass spectrometry that uses a beam of neutral atoms (created by neutralising ions of about 5 keV energy) to sputter sample molecules from a liquid held on the surface of a beam-intersecting sample probe. The impacting atoms deposit energy into the semivolatile matrix, causing desorption of ions, neutral molecules, and clusters of solvent and sample molecules. Desolvation follows desorption, and molecules (M) are usually ionised in a process of protonation to form M H. The mass spectra usually contain a large background of ions from the energy-moderating solvent (e.g., glycerol). |
随便看 |
|
英语词典包含2567994条英英释义在线翻译词条,基本涵盖了全部常用单词的英英翻译及用法,是英语学习的有利工具。