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The Mass Spectrometer. In order to measure the characteristics of individual molecules, a mass spectrometer converts them to ions so that they can be moved about and manipulated by external electric and magnetic fields. The three essential functions of a mass spectrometer, and the associated components, are:
Raman spectroscopy provides information about molecular vibrations that can be used for sample identification and quantitation.The technique involves shining a monochromatic light source (i.e. laser) on a sample and detecting the scattered light.The majority of the scattered light is of the same frequency as the excitation source; this is known as Rayleigh or elastic scattering.he technique involves shining a monochromatic light source (i.e. laser) on a sample and detecting the scattered light. The majority of the scattered light is of the same frequency as the excitation source; this is known as Rayleigh or elastic scattering.