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| == 19th Century ==
| | see [[wikipedia:History of mass spectrometry]] |
| | | [[category:miscellaneous]] |
| :'''1886'''
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| ::[[Eugen Goldstein]] observes [[canal rays]].
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| :'''1898''' | |
| ::[[Wilhelm Wien]] demonstrates that canal rays can be deflected using strong electric and magnetic fields.
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| == 20th Century ==
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| :'''1905'''
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| ::[[Joseph John Thomson]] begins his study of positive rays.
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| :'''1906'''
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| ::Thomson is awarded the Nobel Prize in Physics "in recognition of the great merits of his theoretical and experimental investigations on the conduction of electricity by gases"
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| :'''1919'''
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| :: [[Francis Aston]] constructs the first velocity focusing mass spectrograph with mass resolving power of 130.
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| :'''1922'''
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| ::Aston is awarded the Nobel Prize in chemistry "for his discovery, by means of his mass spectrograph, of isotopes, in a large number of non-radioactive elements, and for his enunciation of the whole-number rule."
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| :'''1931''
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| ::[[Ernest O. Lawrence]] invents the [[cyclotron]].
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| :'''1934'''
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| ::[[Josef Mattauch]] and [[Richard Herzog]] develop the double-focusing mass spectrograph.
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| :'''1936'''
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| ::[[Arthur J. Dempster]] develops the spark ionization source.
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| :'''1937'''
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| ::Aston constructs a mass spectrograph with resolving power of 2000.
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| :'''1939'''
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| ::Lawrence receives the Nobel Prize in Physics for the cyclotron.
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| :'''1939'''
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| ::Lawrence develops the [[Calutron]] for uranium isotope separation.
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| :'''1946'''
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| ::William Stephens presents the concept of a [[time-of-flight]] mass spectrometer.
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| :'''1956''' | |
| ::Fred McLafferty proposes a hydrogen transfer reaction that will come to be known as the [[McLafferty rearrangement]].
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| :'''1959'''
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| ::Researchers at [[[Dow Chemical]] interface a [[gas chromatograph]] to a mass spectrometer.
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| :'''1989'''
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| ::[[Wolfgang Paul]] receives the Nobel Prize in Physics "for the development of the ion trap technique"
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| == 21st Century ==
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| :'''2002'''
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| ::[[John Fenn]] and [[Koichi Tanaka]] are awarded one-quarter of the Nobel Prize in chemistry each "for the development of soft desorption ionisation methods ... for mass spectrometric analyses of biological macromolecules."
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| =External Links=
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| :*[http://www.chm.bris.ac.uk/ms/history.html Bristol History of Mass Spectrometry]
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| :*[http://www.amazon.com/exec/obidos/tg/detail/-/0941901319?v=glance Measuring Mass: From Positive Rays to Proteins by Michael A. Grayson (Editor)]
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| :*[http://masspec.scripps.edu/MSHistory/mshisto.php Scripps History of Mass Spectrometry]
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| :*[[Wikipedia:Mass spectrometry]]
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