mass spectrographn.
/ˌmas ˈspɛktrəɡrɑːf/, /ˌmas ˈspɛktrəɡraf/, U.S. /ˈˌmæs ˈspɛktrəˌɡræf/ A mass spectrometer in which the deflected ions are detected photographically.
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the world > matter > chemistry > chemical assay or analytical chemistry > [noun] > acetimetry > spectrometry > mass spectrometry > apparatus
mass spectrograph1920
mass spectrometer1932
mass spectroscope1941
the world > matter > physics > atomic physics > decomposition of light, spectrum > study of spectra > types of spectrometry or spectroscopy > [noun] > analysis of mass > instrument > producing photograph
mass spectrograph1920
1920 F. W. Aston in London, Edinb., & Dublin Philos. Mag. 6th Ser. 39 611 The Positive Ray Spectrograph or, as it may be more conveniently termed, Mass-Spectrograph.
1945 H. D. Smyth Gen. Acct. Devel. Atomic Energy Mil. Purposes x. 109 Kellex, whose mass spectrograph methods of isotope analysis were sufficiently advanced as to become of great value to the project, as in analyzing samples of enriched uranium.
1984 G. H. Clarfield & W. M. Wiecek Nucl. Amer. i. 13 Aston's precise measurements with the mass spectrograph demonstrated a slight loss of mass as an atomic nucleus is built up.
This entry has been updated (OED Third Edition, December 2000; most recently modified version published online March 2022).
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n.1920