mass spectrometry


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mass spectrometry

(mas spek-trom'ĕ-trē),
The analysis obtained using a mass spectrograph.

mass spectrometry

(in chemistry) a technique for the analysis of a substance in which the molecule is subjected to bombardment by high-energy electrons or atoms to cause ionization and fragmentation to give a series of ions in the gas phase that constitutes the fragmention pattern observed by using a mass spectrometer. A molecule can frequently be identified just on the basis of its mass spectrum. See also spectrometry, spectrophotometry.

mass spectrometry

A method for identifying molecules based on the detection of the mass-to-charge ratio of ions generated from the molecule by vaporisation and electron bombardment. Deflection of the ions through a magnetic field results in a characteristic pattern which is used to define the molecule of interest.

mass spectrometry (MS) (mas' spek·trˑ·n·mē),

n a method of identifying and analyzing substances by fragmenting substances with a bombardment of high-energy electrons. Each molecule has a specific pattern of fragmentation, and these patterns are recorded on a mass spectrum. This technique is often combined with gas-liquid chromato-graphy.
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This is helpful to practitioners of mass spectrometry, who frequently encounter difficulties explaining just what mass spectrometry is to other scientists, funding agencies, the media, and the general public.
But like mass spectrometry, this technique until recently had only worked on small molecules.
The Mass Spectrometry Group, led by NIEHS principal investigator Kenneth B.
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