Mass spectrometry

Mass spectrometry (previously called mass spectroscopy () or informally, "mass-spec" and MS) is an analytical technique used to measure the mass-to-charge ratio of ions. It is most generally used to find the composition of a physical sample by generating a mass spectrum representing the masses of sample components. The mass spectrum is measured by a mass spectrometer.
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Mass spectrometry, n a method of identifying and analyzing substances by fragmenting substances with a bombardment of high-energy electrons. [more]Mass spectrometry - Community and Resources

(of elements) A method for experimentally determining isotopic masses and isotopic abundances . A sample of an element is converted into a stream of ions and passed through an electromagnetic field. Ions with different charge-to-mass ratios are deflected by different amounts, and strike different spots on a film plate or other detector. From the position of the spots, the mass of the ions can be determined; from the intensity of the spot, the relative number of ions (the isotopic abundance) can be determined.

mass-spectrometry
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