mass spectrometern.

Brit.

/ˌmas spɛkˈtrɒmᵻtə/, U.S.

/ˈˌmæs ˌspɛkˈtrɑmədər/

Origin: Formed within English, by compounding. Etymons: mass n.², spectrometer n.

Etymology: < mass n.² + spectrometer n. Compare earlier mass spectrograph n.

An apparatus used to analyse substances by the separation of ions in a sample according to their mass-to-charge ratio, which produces a distinctive mass spectrum; esp. an apparatus of this kind in which the ions are detected electrically rather than photographically.The sample to be analysed is vaporized and ionized in a vacuum, and the resulting ions formed into a beam and accelerated through an electric field. They are then deflected differentially according to their mass, usually by passing through a magnetic field, before detection.

ΘΚΠ

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 > without magnetic fields

mass spectrometer1932

the world > matter > physics > atomic physics > decomposition of light, spectrum > study of spectra > types of spectrometry or spectroscopy > [noun] > analysis of mass > instrument

mass spectrometer1955

spectrograph1955

mass spectroscope1963

1932 Physical Rev. 40 429 A new type of mass spectrometer..in which no magnetic fields are used.

1955 New Biol. 18 66 It is possible by using a mass-spectrometer to determine the proportions of heavy nitrogen, N¹⁵, and the normally more abundant isotope, N¹⁴, in a given sample.

1969 D. Price & J. E. Williams Time-of-flight Mass Spectrometry p. ix There are now about 300 time-of-flight mass spectrometers in use throughout the world.

1991 New Scientist 21 Dec. 13/1 It contains a mass spectrometer and airports use it to sniff..checked-in luggage for traces of gas from explosives.

This entry has been updated (OED Third Edition, December 2000; most recently modified version published online March 2022).

单词	mass spectrometer
释义	mass spectrometern. Brit. /ˌmas spɛkˈtrɒmᵻtə/, U.S. /ˈˌmæs ˌspɛkˈtrɑmədər/ Origin: Formed within English, by compounding. Etymons: mass n.², spectrometer n. Etymology: < mass n.² + spectrometer n. Compare earlier mass spectrograph n. An apparatus used to analyse substances by the separation of ions in a sample according to their mass-to-charge ratio, which produces a distinctive mass spectrum; esp. an apparatus of this kind in which the ions are detected electrically rather than photographically.The sample to be analysed is vaporized and ionized in a vacuum, and the resulting ions formed into a beam and accelerated through an electric field. They are then deflected differentially according to their mass, usually by passing through a magnetic field, before detection. ΘΚΠ 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 > without magnetic fields mass spectrometer1932 the world > matter > physics > atomic physics > decomposition of light, spectrum > study of spectra > types of spectrometry or spectroscopy > [noun] > analysis of mass > instrument mass spectrometer1955 spectrograph1955 mass spectroscope1963 1932 Physical Rev. 40 429 A new type of mass spectrometer..in which no magnetic fields are used. 1955 New Biol. 18 66 It is possible by using a mass-spectrometer to determine the proportions of heavy nitrogen, N¹⁵, and the normally more abundant isotope, N¹⁴, in a given sample. 1969 D. Price & J. E. Williams Time-of-flight Mass Spectrometry p. ix There are now about 300 time-of-flight mass spectrometers in use throughout the world. 1991 New Scientist 21 Dec. 13/1 It contains a mass spectrometer and airports use it to sniff..checked-in luggage for traces of gas from explosives. This entry has been updated (OED Third Edition, December 2000; most recently modified version published online March 2022). < n.1932
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