12.2: Interpreting Mass Spectra - Chemistry LibreTexts
2024年5月27日 · interpret the fragmentation pattern of the mass spectrum of a relatively simple, known compound (e.g., hexane). use the fragmentation pattern in a given mass spectrum to assist in the identification of a relatively simple, unknown compound (e.g., an unknown alkane).
质谱法 - 维基百科，自由的百科全书
质谱 （德語： Massenspektrometrie，英語： mass spectrometry，缩写：MS）是一种电离化学物质并根据其 质荷比 （质量 - 电荷 比）对其进行排序的分析技术。 简单来说，质谱测量样品内化学物质的质量。 质谱法被用于许多不同领域，并被用于纯样品和复杂混合物的检测。 质谱 是离子訊号作为 质荷比 的函数的曲线图。 这些频谱被用于确定样品的元素或 同位素，颗粒和 分子 的质量，并阐明分子的化学结构，如 肽 和其他 化合物。 在典型的质谱法中，可以是固体，液体或气 …
Mass spectrometry - Wikipedia
A mass spectrum is a type of plot of the ion signal as a function of the mass-to-charge ratio. These spectra are used to determine the elemental or isotopic signature of a sample, the masses of particles and of molecules, and to elucidate the chemical identity or structure of molecules and other chemical compounds.
Mass spectrum - Wikipedia
A mass spectrum is a histogram plot of intensity vs. mass-to-charge ratio (m/z) in a chemical sample, [1] usually acquired using an instrument called a mass spectrometer. Not all mass spectra of a given substance are the same; for example, some mass spectrometers break the analyte molecules into fragments ; others observe the intact molecular ...
质谱法 - 百度百科
质谱法 (Mass Spectrometry,MS)即用电场和磁场将运动的离子（带 电荷 的原子、分子或分子碎片，有分子离子、同位素离子、碎片离子、重排离子、多电荷离子、亚稳离子、负离子和离子－分子相互作用产生的离子）按它们的质荷比分离后进行检测的方法。 测出离子准确质量即可确定离子的化合物组成。 这是由于 核素 的准确质量是一多位 小数，决不会有两个核素的质量是一样的，而且决不会有一种核素的质量恰好是另一核素质量的整数倍。 分析这些离子可获得化合物的分子 …
Mass Spectrometry - Michigan State University
The three essential functions of a mass spectrometer, and the associated components, are: 1. A small sample is ionized, usually to cations by loss of an electron. The Ion Source. 2. The ions are sorted and separated according to their mass and charge. The Mass Analyzer. 3. The separated ions are then measured, and the results displayed on a chart.
12.2: Interpreting Mass Spectra - Chemistry LibreTexts
2024年9月30日 · What kinds of information can we get from a mass spectrum? The most obvious information is the molecular weight of the sample, which in itself can be invaluable. If we were given samples of hexane (MW = 86), 1-hexene (MW = 84), and 1-hexyne (MW = 82), for example, mass spectrometry would easily distinguish them.
Mass spectrometry | Definition, Applications, Principle, & Facts ...
2024年11月29日 · mass spectrometry, analytic technique by which chemical substances are identified by the sorting of gaseous ions in electric and magnetic fields according to their mass-to-charge ratios.
Mass Spectrometry Decoded: Principle, Steps & Uses - Microbe …
2024年7月1日 · Mass Spectrometry (MS) is an analytical chemistry technique that helps identify the amount and type of chemicals present in a sample by measuring the mass-to-charge ratio and abundance of gas-phase ions.
Mass spectrometry and a guide to interpreting mass spectra
2015年5月7日 · Mass spectrometry allows us to measure the masses of atoms and molecules, and also obtain information about their chemical structure. Before we talk about interpreting spectra, let’s discuss how they are generated in the first place.
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