mass$47074$ - определение. Что такое mass$47074$
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Что (кто) такое mass$47074$ - определение

ANALYTICAL TECHNIQUE BASED ON DETERMINING MASS TO CHARGE RATIO OF IONS
Mass spectrometer; Mass spectrograph; Mass spectroscopy; Mass Spectrometer; Mass Spectrometry; Mass Spectroscopy; Spectrum analysis, mass; Mass spec; Mass spectroscope; Mass spectrography; Mass analyzer; Mass Spec; Mass-spec; Mass spectrometers; Isotopic distribution; Accelerated mass spectrometer; Mass Spectrograph; Mass accuracy; Mass spectrometrist; Mass Spectrometers; Mass spectrum analyzer; Trace gas analysis; Soft ionization; Hard ionization; Applications of mass spectrometry
  • [[Calutron]] mass spectrometers were used in the [[Manhattan Project]] for uranium enrichment.
  • [[Surface ionization]] source at the [[Argonne National Laboratory]] linear accelerator
  • Replica of [[F.W. Aston]]'s third mass spectrometer
  • ThermoQuest AvantGarde sector mass spectrometer
  • Quadrupole mass spectrometer and electrospray ion source used for Fenn's early work
  • Inductively coupled plasma ion source
  • [[Indianapolis Museum of Art]] conservation scientist performing [[liquid chromatography–mass spectrometry]]
  • Fourier-transform ion cyclotron resonance mass spectrometer
  • Orbitrap mass analyzer
  • TEGA]] mass spectrometer
  • MALDI]]
  • [[Toluene]] electron ionization mass spectrum
  • WB-57]] high-altitude research aircraft

mass spectrometer         
¦ noun an apparatus for separating isotopes, molecules, and molecular fragments according to mass by ionizing them and making them move in different paths by means of electric and magnetic fields.
Mass spectrometry         
Mass spectrometry (MS) is an analytical technique that is used to measure the mass-to-charge ratio of ions. The results are presented as a mass spectrum, a plot of intensity as a function of the mass-to-charge ratio.
mass spectrograph         
¦ noun a mass spectrometer in which the particles are detected photographically.

Википедия

Mass spectrometry

Mass spectrometry (MS) is an analytical technique that is used to measure the mass-to-charge ratio of ions. The results are presented as a mass spectrum, a plot of intensity as a function of the mass-to-charge ratio. Mass spectrometry is used in many different fields and is applied to pure samples as well as complex mixtures.

A mass spectrum is a type of plot of the ion signal as a function of the mass-to-charge ratio. These spectra are used to determine the elemental or isotopic signature of a sample, the masses of particles and of molecules, and to elucidate the chemical identity or structure of molecules and other chemical compounds.

In a typical MS procedure, a sample, which may be solid, liquid, or gaseous, is ionized, for example by bombarding it with a beam of electrons. This may cause some of the sample's molecules to break up into positively charged fragments or simply become positively charged without fragmenting. These ions (fragments) are then separated according to their mass-to-charge ratio, for example by accelerating them and subjecting them to an electric or magnetic field: ions of the same mass-to-charge ratio will undergo the same amount of deflection. The ions are detected by a mechanism capable of detecting charged particles, such as an electron multiplier. Results are displayed as spectra of the signal intensity of detected ions as a function of the mass-to-charge ratio. The atoms or molecules in the sample can be identified by correlating known masses (e.g. an entire molecule) to the identified masses or through a characteristic fragmentation pattern.