In all types of mass ______, it is _____ phase _____ that are detected. In EI MS
ID: 513221 • Letter: I
Question
In all types of mass ______, it is _____ phase _____ that are detected. In EI MS, otherwise known as ______ _____ MS, ions are generated in a vacuum chamber by bombarding molecules with high-energy ______. After a collision takes place, a _____ cation is formed. These ions are detected and then reported on a mass spectrum, where the x-axis has units of ______/______ and the y-axis is percent ______ _____. The most abundant ion in a mass spectrum is known and the _____ peak. The ion associated with the original molecule is the _____ ion. This ion can decompose into other species known as _____ions.Explanation / Answer
In all types of mass spectrometry, it is gas phase ions that are detected. In EI MS, otherwise known as electron ionization MS, ions are generated in a vacuum chamber by bombarding molecules with high-energy electrons. After a collision takes place, a radical cation is formed. These ions are detected and then reported on a mass spectrum, where the x-axis has units of m/z and the y-axis is percent relative abundance. The most abundant ion in a mass spectrum is known as the base peak. The ion associated with the original molecule is the molecular ion. This ion can decompose into other species known as fragment ions.
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